CN104884814A - System and method for operating a compressor drive - Google Patents
System and method for operating a compressor drive Download PDFInfo
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- CN104884814A CN104884814A CN201380056571.0A CN201380056571A CN104884814A CN 104884814 A CN104884814 A CN 104884814A CN 201380056571 A CN201380056571 A CN 201380056571A CN 104884814 A CN104884814 A CN 104884814A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0246—Surge control by varying geometry within the pumps, e.g. by adjusting vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0261—Surge control by varying driving speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Control Of Positive-Displacement Air Blowers (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Embodiments of a system and method manipulate the position of inlet guide vanes and the drive speed for optimizing performance of a compressor device (e.g., a centrifugal compressor). In one embodiment, the systems and methods can correlate setpoints (e.g., inlet volume flow and discharge pressure) desired for installation and/or implementation of the compressor device with reference data collected as part of in-situ performance testing. This reference data identifies, in one embodiment, a position for the inlet guide vanes and a drive speed for a number of different setpoints at a set of reference conditions (e.g., ambient temperature and ambient pressure).
Description
Background technique
Theme disclosed herein relates to compressor set (such as centrifugal compressor), and particularly relates to the system and method for the performance for optimizing the compressor set comprising entrance guide vane (IGV) assembly and variable speed drive.
Many compressor sets (such as centrifugal compressor) use inlet guide vane to regulate the flow of the working fluid entering into compressor set.Such as, the variable position of inlet guide vane, to increase and to reduce flow rate-such as by changing the effective flow area leading to the ingress of compressor.When combining the variable speed drive that can change the rotational speed of impeller and using, the operation of the controlled compressor set processed of traditional control system with improving SNR, efficiency, and reduces running cost by reducing energy ezpenditure in addition.
The technique optimizing the performance of these compressor sets needs to test widely and identify often.This technique may be work and time intensive, and in addition must time be everlasting facility place locally independent compressor set on perform.
Summary of the invention
Present disclosure describes improvements: which reduce the necessary time of the compressor set for onsite application and effort that qualification has variable inlet guide vane and variable speed drive.These improve and are associated with the Reference data that a part of testing as field performance is collected by the set point (such as inlet volumetric flow and head pressure) required for the specific installation of compressor set and/or enforcement.In one embodiment, this Reference data determines inlet guide vane position and the actuating speed of many different set points under one group of base condition.As described below, present disclosure proposes the embodiment of such system and method: it uses this Reference data to select and realize required set point and the operation setting needed for enhancing compressor set overall performance under conditions present (it is different from base condition).
Accompanying drawing explanation
Briefly reference is carried out to accompanying drawing now, wherein:
Fig. 1 depicts the front perspective view of an example of compressor set;
Fig. 2 depicts the front detail drawing of an example of compressor set, and it has a kind of representative configuration of inlet guide vane assembly;
Fig. 3 depicts the front detail drawing of an example of compressor set, and it has another representative configuration of inlet guide vane assembly;
Fig. 4 depicts the sketch of the exemplary embodiment of the system of the operation for controlling compressor set (such as Fig. 1, the compressor set of 2,3 and 4);
Fig. 5 depicts the flow chart of the exemplary embodiment of the method for operate compressor device (such as Fig. 1, the compressor set of 2,3 and 4);
Fig. 6 depicts the flow chart of another exemplary embodiment of the method for operate compressor device (such as Fig. 1, the compressor set of 2,3 and 4);
Fig. 7 depicts an example of the method for the efficiency for compressor optimizing device (such as Fig. 1, the compressor set of 2,3 and 4);
Fig. 8 depicts the top view of the Exemplary portals guide vane for compressor set (such as Fig. 1, the compressor set of 2,3 and 4) be in primary importance and the second place;
Fig. 9 depicts the top view of Exemplary portals guide vane of Fig. 7 being in primary importance, the second place and the 3rd position; And
Figure 10 depicts the high-level schematic wiring diagram of the example for the controller used for compressor set (such as Fig. 1, the compressor set of 2,3 and 4) and system (system of such as Fig. 4).
In all some views, the place be suitable for, the identical or corresponding element of similar label instruction and unit; Unless otherwise noted, these views are nots to scale (NTS).
Embodiment
Get on very well widely, discussion below focuses on the embodiment of the system and method for the performance of amendment compressor set (such as centrifugal compressor).These embodiments can determine the operation setting (position of such as inlet guide vane and actuating speed) about compressor set, thus the set point (such as inlet volumetric flow and head pressure) realized needed for some, and identify the performance of compressor set without the need to performing test widely.In one aspect, these system and methods select operation setting by being associated with one group of baseline performance measurement by required set point.This group data operation to the compressor set under some operational condition (such as environment temperature, ambient pressure, relative moisture etc.) quantizes.
These system and methods utilize the data relevant with the operation of compressor set to construct compressor set further, such as, select the position of inlet guide vane in the inlet guide vane assembly occuping impeller upstream, and/or select the actuating speed being used for impeller.In addition, by monitoring operating parameter (such as head pressure) continuously and adjusting the position of inlet guide vane and/or actuating speed, the following examples form feedback control loop, and it can improve compressor efficiency and improve performance envelope.Such as, these system and methods can set the position of inlet guide vane and the speed of impeller, to make working fluid remain in one or more required flow parameter (such as entrance flow rate and head pressure), operate when inputting minimum power capability to drive unit simultaneously.
Fig. 1 depicts an example of compressor set 100.In FIG, compressor set 100 has the entrance 102 of band inwall 104 (such as it can form a part for the component of the inlet shroud be commonly called in compressor set 100).Entrance 102 connects in the mode be connected that circulates with spiral case 106, and spiral case is positioned at the downstream of entrance 102 and defines outlet 108.Driver element 110 is connected with the impeller 112 with central axis 114.During operation, driver element 110 makes impeller 112 rotate, thus is pumped in entrance 102 by working fluid (such as air).Impeller 112 compression working fluid.The working fluid of compression flow in spiral case 106.In one embodiment, compressor set 100 is connected at outlet 108 place and industrial pipeline, so that at certain pressure and/or discharge working fluid as required under some set point of specifying (such as inlet volumetric flow, head pressure etc.).Such as, the embodiment of compressor set 100 has application in various setting and industry, comprises automotive industry, electronics industry, aerospace industry, oil and natural gas industry, power generation industries, petrochemical industry etc.
Fig. 2 and Fig. 3 shows the front detail drawing of the exemplary embodiment of compressor set 200 (Fig. 2) and compressor set 300 (Fig. 3).In fig. 2, entrance 202 has inlet guide vane assembly 216, and it occupy the upstream of impeller (impeller 112 of such as Fig. 1).Inlet guide vane assembly 216 has multiple inlet guide vane 218 with blade body 220.When working fluid enters entrance 202, inlet guide vane 218 regulates the flow of working fluid.Blade body 220 is connected with the inwall 204 of entrance 202, and it extends to the second end 224 of the central axis 214 near impeller from the first end 222 near inwall 204.In one example, blade body 220 can around axis 226 move (such as pivot or rotation).Compressor set 200 also comprises actuator, its be substantially depicted as label 228 the structure that identifies.Actuator 228 and inlet guide vane 218 are connected, to change the orientation of blade body 220.Such as, the operation of actuator 228 may cause inlet guide vane 218 to rotate, and this changes effective flow area of entrance 202.
As shown in the best in the structure of Fig. 3, together with other component marked in figure (first end 322 of such as inwall 304, blade body 320 and spin axis 326), compressor set 300 comprises flow director 330 (being also referred to as " bullet 330 "), and it occupy in entrance 302.Bullet 330 defines multiple stream chamber 332 circumferentially arranged around central axis 314.Stream chamber 332 allows working fluid to enter in entrance 302.In the example of fig. 3, blade body 320 ends on the second end 324, its lower end near chamber 332 and/or lower surface.The operation of actuator 328 may cause inlet guide vane 318 to rotate, thus changes effective flow area in chamber 332.
Fig. 4 shows the schematic diagram of the system 434 of the operation for controlling compressor set 400.System 434 comprises controller 436, operational condition sensor 438, parameter sensors 440 and variable speed drive 442, and itself and driver element 410 are connected.Controller 436 can communicate with driver element 410-such as by communicating with variable speed drive 442, and make speed change to second speed from First Speed to cause driver element 410.Controller 436 also communicates with inlet guide vane assembly 416 by communicating with actuator 428, to cause inlet guide vane 418 to change position, such as, fades to the second place from primary importance.In one embodiment, controller 436 (or other devices one or more in system 434) communicates with peripheral unit 446 (such as display device, computer, smart phone, kneetop computer, panel computer etc.) and/or external server 448 by network 444.
The example of controller 436 comprise computer and have processor and storage-its can store and perform some executable instruction, software program etc.-computing device.Controller 436 may be separate unit, such as a part for the control unit of operate compressor device 400 and miscellaneous equipment.This control unit and/or controller 436 can be positioned on away from compressor set 400 place, by wireless and wire communication-such as by network 444, and communicate between compressor set 400 and controller 436.In other example, controller 436 and compressor set 400 integrate, such as, as operating driver element 410 and/or the hardware of actuator 428 and/or a part for software.
The example of operational condition sensor 438 provides the information of the environment around about compressor set 400.Except other measured value, this information can comprise environment temperature, ambient pressure and relative moisture.As described below, the enforcement of system 434 can use this information to carry out determination operation and arrange (position of such as inlet louver guider 416 and the speed of driver element 410), with the set point utilizing these operational conditions to reach required, and in a specific example, the operational condition that there is (prevail) during the set point of the operational condition during current operation and the on-the-spot test of compressor set associates by it.
One or more operating parameters of parameter sensors 440 monitoring compressor device 400.Inter alia, the example of these operating parameters comprises flow parameter (such as flow rate, flow velocity, static pressure, pressure head etc.) and mechanical parameter (such as input power, electric current, voltage, moment of torsion etc.).Parameter sensors 440 can comprise one or more sensor device to operating parameter sensitivity.These sensor devices can be presented as flowmeter, pressure transducer, accelerometer and similar component.Such device produces signal (such as analogue signal and digital signal), its to the measured value of corresponding operating parameter encode-this device is configured to measure this measured value.
The example of parameter sensors 440 can with energy is passed to the axle of impeller 412 from driver element 410 or other mechanism is connected.When this position, parameter sensors 440 can measure several parameters (such as moment of torsion, angular velocity etc.) of the operation defining driver element 410 and/or compressor set 400 substantially.Other position of parameter sensors 440 comprises near spiral case (spiral case 106 of such as Fig. 1) inner portions and outlet (outlet 108 of such as Fig. 1), and other measures the position through the flow parameter of the working fluid of compressor set 400.In addition, compressor set 400 can comprise the circuit of operation driver element 410, it comprises some element (such as capacitor, resistor, transistor etc.) structure, thus the input of monitoring to driver element 410, such as electric current, voltage, power etc.
The embodiment of system 434 can comprise multiple sensor device (such as parameter sensors 440), and it measures different operating parameters.Such as, system 434 can dispose flowmeter at entrance (entrance 102 of such as Fig. 1) place, pressure transducer is disposed near outlet (outlet 108 of such as Fig. 1), and/or deployment circuit, to monitor the electricity used at compressor set 400 operation period driver element 410.Signal is supplied to controller 436 by sensor device.These signal transmission and/or the data relevant with the operation of compressor set 400 and information are encoded.Controller 436 can process the signal from parameter sensors 440, to produce output.These outputs can be encoded to the instruction of the operation for one or more component, to configure compressor set 400.As more elaborations below, output can be encoded to instruction, to change the position of inlet guide vane 418, such as, indicates actuator 428 operation to change orientation and/or the position of inlet guide vane 418.Such as, these instructions can cause actuator 428 to move, and this makes again inlet guide vane 418 move (such as rotating) by the angular deflection from primary importance to the second place.
In one embodiment, the motion of actuator 428 changes the orientation of inlet guide vane 418 relative to working fluid stream.Although the disclosure contemplates the scope of structure widely for inlet guide vane 418, but in one example, inlet guide vane 418 can rotate to another location (such as the second place) from a position (such as primary importance), and vice versa.When being present in inlet guide vane assembly (the inlet guide vane assembly 216 of such as Fig. 2 and the inlet guide vane assembly 316 of Fig. 3), the rotation of the collective of the inlet guide vane 418 caused by actuator 428 changes inlet guide vane 418 position relative to each other, thus increase and reduce entrance (such as Fig. 1, the entrance 102 of 2 and 3,202,302) flow area.
Fig. 5 shows the flow chart of the exemplary embodiment of the method 500 of operate compressor device (such as Fig. 1, the compressor set 100,200,300 and 400 of 2,3 and 4).Method 500 comprises the first signal receiving in step 502 and encode to first group of operational condition of compressor set, and the first set point is transformed into the second set point for compressor set in step 504.In one embodiment, the second set point corresponds to second group of operational condition, and it is different from first group of operational condition.Method 500 also comprises the operation setting selected in step 506 for compressor set, to realize the second set point.In one embodiment, method 500 also comprises and produces output in step 508, and it is to instruction encoding, to carry out operate compressor device according to operation setting.
As mentioned above, first group of operational condition (such as in step 502) can describe compressor set run residing for condition (such as temperature, pressure, relative moisture etc.).These conditions can affect the position of inlet guide vane and the speed of driver element, to obtain required set point.One or more sensing device (the operational condition sensor 438 of such as Fig. 4) can be derived from about the data of first group and second group and information, which provide to the environment temperature of information-such as, ambient pressure, etc. the signal of value-encode.
The operation setting making compressor set realize required set point can associate with the operation setting of the compressor set used under different operating condition by the step (such as in step 504) for the first set point being transformed into the second set point.As mentioned above, the operation setting for compressor set can comprise the position of inlet guide vane and/or actuating speed that is directed and driver element, and/or its combination.These steps can be compressor set and determine suitable operation setting, to realize required set point.In one embodiment, method 500 can comprise one or more step of collecting operating data for the on-the-spot test by compressor set.This test can make baseline compressor performance quantize, such as, in conjunction with some operation setting of compressor set.In one example, second group of operational condition defines the operational condition (such as temperature, pressure, relative moisture etc.) existed when test occurs at the scene.
The embodiment of method 500 can comprise the step for the first inlet volumetric flow being transformed into the second inlet volumetric flow, wherein the inlet volumetric flow of the second inlet volumetric flow representative at benchmark (or second group) operational condition place.In one example, inlet volumetric flow calculates according to following equation (1):
Wherein SP
secondthe second set point when second group of operational condition (environment temperature such as at the scene during testing property and ambient pressure), SP
firstthe first set point (environment temperature of such as every day and ambient pressure) when first group of operational condition, P
firstthe ambient pressure of first group of operational condition, P
secondthe ambient pressure of second group of operational condition, T
firstthe environment temperature of first group of operational condition, and T
secondit is the environment temperature of second group of operational condition.
Method 500 also can comprise the step for the first head pressure being converted to the second head pressure.In one embodiment, the second head pressure represents under benchmark (or second group) operational condition relative to the head pressure of surge (and/or surge condition).Surge condition is the feature of compressor set, which defines compressor set and energy can be given working fluid to overcome minimum flow during system resistance.The example of surge condition is subject to the impact of system construction (such as pipeline, system back pressure etc.).When the outbreak of surge condition, inlet volumetric flow becomes unstable, and this may cause flowing reverse fluctuation, during this period, flows fluctuation between suction and discharge.
Method 500 can use surge condition feature to calculate the value for adiabatic head, and selects the value of second head pressure corresponding with the value of adiabatic head.Head pressure under surge condition can associate with head pressure required under conditions present by adiabatic head.In one example, the adiabatic head being used for compressor set under conditions present associates with the adiabatic head under base condition by switch process, to select the second head pressure.In a specific example, method 500 comprises the step calculating adiabatic head according to equation (2) below,
Wherein Head
adiabaticbe the adiabatic head under conditions present, k is the ratio of heat capacities of working fluid, Z
abe the average gas compressibility coefficient of working fluid, R is the gas constant of working fluid, and MW is the molecular weight of working fluid, T
1the environment temperature of current operational conditions, P
1the ambient pressure of conditions present, and P
2it is the head pressure of conditions present under surge.Utilize equation 2 above, method 500 is by the Head under conditions present
adiabaticvalue and the Head that calculates with base condition of field performance test period
adiabaticvalue associate, to determine the second head pressure.
The embodiment of method 500 also can determine the situation under wherein set point can make compressor set be placed in failure condition.Exemplary failure condition comprises the above-mentioned surge condition causing stream fluctuation between sucking and discharging.Method 500 can comprise one or more step for producing alarm in response to the value that compressor set may be caused to enter the set point of failure condition.In one example, these steps can comprise the step for being compared with the value controlling that surge line exists by the inlet volumetric flow under required head pressure.The example controlling surge line defines the combination of the set point of the generation by causing surge.If inlet volumetric flow meets or exceedes the value controlled on surge line, so method 500 can comprise the step of the output for generation of the information transmitting wait condition and/or possible failure condition.
Question blank and/or other storage vault of the data gathered under benchmark (or second group) operational condition is reflected for selecting the step of operation setting (such as in step 506) to utilize.Table 1 is below an example of the question blank for this object.
Table 1
As mentioned above, table 1 has collected under second group of (or benchmark) operational condition from the data collected by field performance test.In one example, these data reflect head pressure and the inlet volumetric flow of the compressor set configured under given one group of operation setting (position (%) of such as IGV and actuating speed (Hz)).These data are collected in some operational condition (such as environment temperature and ambient pressure), and it contributes to required set point to associate (as described above) with the data in table 1.
The embodiment of method 500 also can comprise the step for the second set point (namely through first (or current) set point of conversion) in navigation watch 1, and for distributing the step of the value corresponding with the second set point identified in table 1 for operation setting.Such as, if the second set point comprises the inlet volumetric flow with 29,000SCFM value, so method 500 is by the value for finding in operation setting allocation table 1, and it comprises %IGV value and the 52Hz of 35.These values are corresponding with the frequency of the position of inlet guide vane and the variable speed drive of compressor set respectively, to realize the inlet flow rate value of 29,000SCFM.
In one embodiment, if the method 500 can comprise for data in interpolation and/or operation table 1-such as do not find in Table 1 the second set point-step.These steps can comprise such as operation setting selects the first value and the second value, and it is corresponding with the upper value (" UV ") of the second set point and the lower value (" LV ") of the second set point respectively.Step also can comprise the requirements (" RV ") such as calculated for operation setting, and wherein requirements can calculate according to equation (3) below:
Wherein OP
rvrequired operation setting (such as IGV is arranged and/or actuating speed), OP
lvthe lower value of operation setting (such as IGV is arranged and/or actuating speed), OP
uvthe upper value of operation setting (such as IGV is arranged and/or actuating speed), SP
rvthe value of the second set point (such as inlet volumetric flow and/or head pressure), SP
lvthe lower value of the second set point (such as inlet volumetric flow and/or head pressure), and SP
uvit is the upper value of the second set point (such as inlet volumetric flow and/or head pressure).
Disclosure conception uses table 1, and conception is for locating, distributing and the various steps of interpolation, uses for various input set point, comprise entrance volume flowrate (as in exemplifying embodiment above use) and head pressure.For the object of the latter, if that is, set point is head pressure, so mode of execution will focus on use table 1 to determine the particular value of head pressure.Similarly, any interpolation occurs by equation (3), it makes use of the value of the various variablees corresponding with head pressure.And, in other embodiments, method 500 can comprise based on comprising multiple set point of entrance volume flowrate and head pressure thus the step arranged for compressor set determination operation, and both values of wherein one or more inlet volumetric flows and head pressure will need interpolation and/or use equation (3) above to carry out apportioning cost to operation setting.
The component of compressor set can be instructed to operate according to the value of operation setting for generation of the step (such as in step 508) exported.Thus, inlet guide vane and/or driver element can be set on the position and speed distributed in above-mentioned steps by this output respectively.In other example, output can such as over the display, and/or provide vision to indicate as the end user that alphabet-numeric playing is designated as operation setting, and end user can understand suitable operation setting based on required set point thus.End user manually can adjust the component of compressor set, to realize operation setting.But the disclosure contemplates and the operation of compressor set can be made according to operation setting to carry out the various ways operated.
Fig. 6 shows an example of the method 600 for operate compressor device.Outside the step (such as step 602,604,606 and 608) of method 500 above, method 600 also comprises optimizes compressor efficiency based on operation setting in step 610.As below in detail as described in, the example of optimization may revise the configuration of the component of compressor set, thus reduces input power and/or power consumpiton to greatest extent, keeps operation under required set point simultaneously.For this reason, in one example, this feature of method 600 can change the speed of driver element and/or the position of inlet guide vane, thus determines such variable combination: it meets threshold operation standard, such as, for input power and/or the power consumpiton of compressor set.
Illustratively, show in the figure 7 for operate compressor device to improve an example of the method 700 of efficiency.The method 700 comprises and receives secondary signal in a step 702, and it is encoded according to first value of the first operation setting to the operating parameter of compressor set.The method 700 is also included in the step for receiving the 3rd signal at step 704 place, and the 3rd signal is encoded according to second value of the second operation setting to the operating parameter of compressor set.Method 700 also comprises and compares the first value and the second value in step 706, and selects the increment changing the second operating parameter in step 708, and wherein increment defines the relative position of the second value relative to the first value.The method 700 produces output other also comprising in step 720, and it is to instruction encoding, moves by this increment to make the second operation setting.
Under the step receiving the first signal (such as in a step 702) and secondary signal (such as in step 704) occurs in different operation setting.Operation setting is the combination that component (such as inlet guide vane, driver element, variable speed unit etc.) defines one or more setting or setting.In one example, the setting of the first operation setting is different from the setting of the second operation setting, to catch may changing of compressor set operation.In order to illustrate, Fig. 8 shows the example of inlet guide vane 800 in primary importance 850 and the second place, and the second place is identified by imaginary line and numeral 852.Inlet guide vane 800 has the blade body 820 rotated around spin axis 826.This rotation can change the leading edge 854 of blade body 820 and the position of trailing edge 856.
The communication of the first signal and secondary signal occurs in such as between parameter sensors 440 (Fig. 4) and controller 436 (Fig. 4) by wireless and/or wire communication.The information that the operating parameter of signal pair and compressor set 100 (Fig. 1,2 and 3) is relevant is encoded.This information comprises value (being also referred to as " measured value "), and it can the amount (such as meter per second, Hz etc.) of operating parameter under reflected measurement or other determinant factor (such as voltage levvl, levels of current, power etc.).In one embodiment, method 700 can comprise for receiving multiple signal from different sensor devices and selecting the step of one or more signal for the type based on the information such as coded by this signal and data.These features of method 700 can allow to select customizing messages, such as impeller 112, the flow rate entering working fluid of 412 (Fig. 1 and 4) upstream, and/or the combination of information, such as impeller 112, the flow rate entering working fluid of 412 (Fig. 1 and 5) upstream, the outlet pressure at 108 (Fig. 1) place and the power consumpiton at driver element 110,410 (Fig. 1 and 5) place.These selections may be the parts of user interface (such as graphical user interface), and its peripheral unit 446 (Fig. 4) be associated in the embodiment of one or more compressor set with conceiving herein and/or system or other display device show.
Step (such as step 706) for comparing the first value and the second value determines compressor set 100 (Fig. 1,2 and 3) operational change or difference, and it is corresponding with the change in location of diffuser vane 300.These change case are as can be increased and/or reducing operating parameter.For the object of an example, this comparison captures driver element 110, the relative change of the input power (or power consumpiton) of 410 (Fig. 1 and 5), it occurs in when operation setting incrementally changes, such as, when inlet guide vane moves to the second place 852 from primary importance 850.
The step (such as in step 708) of increment is selected to provide the increment change of operation setting.This increment change intention changes the operation of compressor set, such as, to improve the performance of compressor set.The example of increment change can limit both the amount of motion that occurs in inlet guide vane 800 and moving direction.In other example, increment change may cause the change of the actuating speed of driver element.This change such as can specify the change of the frequency (Hz) of variable frequency driver.
Such as, Fig. 9 shows inlet guide vane 800 and is in the 3rd position 858, and its position representing inlet guide vane 800 offset by increment 860 from the second place 852.As shown in the example of Fig. 9, increment 860 defines several position features (such as angular deflection 862 and direction 864), and they determine the intensity of variation of position relative to the second place 852 of inlet guide vane 800.In one embodiment, method 700 can comprise relative value for comparing the first value and the second value with the step of distribution locations feature.Such as, if the second value is less than the first value, so method 700 can comprise the step for distributing first group of position feature for increment 860, and first group of position feature comprises first direction and the first angular deflection.On the other hand, when the second value is less than the first value, then method 700 can comprise the step for distributing second group of position feature for increment 860, and second group of position feature comprises second direction and the second angular deflection.In one example, first direction is different from second direction (such as about Fig. 9, first direction is clockwise direction, and second direction is counterclockwise).
The amount of angular deflection can not only change between the first angular deflection and the second angular deflection but also based on the first value of operating parameter and the second value.Such as, the embodiment of method 700 can comprise: for calculating the step of changing value, and this changing value can have the value equal with the mathematics difference between the first value and the second value; And the step for changing value is compared with the threshold criteria of the nominal value that can be defined for position feature.In one example, if changing value meets threshold criteria, so method 700 can comprise the step for value being distributed to increment 860.These values can reduce along with changing value (such as along with the operation either converges of compressor set is to one group of best operating characteristics) and reduce.
Producing the step (such as in step 720) exported may cause compressor set to operate according to different operation setting.In one example, export causing the instruction of inlet guide vane 800 movement between the second place 852 and the 3rd position 858 to encode.Output can comprise can encode to instruction with any signal of operation equipment (such as simulation and/or digital signal).In example herein, output may cause actuator (such as Fig. 2, the actuator 228 of 3 and 4,328,428) mobile, it directly and/or indirectly can promote inlet guide vane (such as Fig. 2, the inlet guide vane 218 of 3 and 4,318,418 and/or the inlet guide vane 800 of Fig. 8 and 9) motion between one or more in primary importance 850, the second place 852 and the 3rd position 858.
In view of to the discussion before method 500,600 and 700, generally speaking, one or more steps of method 500,600 and 700 can be encoded into one or more executable instruction (such as hardware, firmware, software, software program etc.).These executable instructions may be computer-implemented method and/or a part for program, and it performs by processor and/or treatment device.The example of controller 436 (Fig. 4) can perform these executable instructions, export to produce some, such as encode to change inlet guide vane 218 to instruction, 318,418 (Fig. 2,3, with 4) the signal of position, and encode to change driver element 110 to instruction, the signal of the operation of 410 (Fig. 1 and 4), etc.
The disclosure conceives such embodiment further: wherein, and any one in method 500,600 and 700 embodies iterative technique and/or multioperation technology, to focus on and to optimize the operation of such as compressor set 100,200,300,400 (Fig. 1,2,3 and 4).For this reason, method 700 can comprise one or more to for operating parameter one or more values (such as the first value and the second value) and position feature is reseted and/or initialized step.This feature makes method prepare receive extra data and/or operate as follows: comparative analysis facilitates the increment change of operation setting, the position of such as inlet guide vane and the speed of driver element.Such as, in one embodiment, when second time " passing through " method 700, the second value can be distributed to the first value from operating parameter, and the second value then can comprise new value, that define the operating value occurred after inlet guide vane and/or motor speed change (such as being undertaken by increment from the second operation setting).Like this, for method being carried out to iteration to reach the object of optimal case, value before at least one and new value can compare by method 700.For the object of this example, may not need to receive and/or decodes first signal (such as in a step 702), but supplement for being that the first value distributes the second value for the step of method 700, initialization second is worth, and continues the one or more steps receiving secondary signal (such as in step 704).
Figure 10 depicts schematic diagram, it is from the high-level schematic wiring diagram presenting an example for controller 900, controller 900 can processing data (such as signal), compressor set (such as Fig. 1 is instructed to produce, 2, the compressor set 100,200,300 of 3 and 4) carry out the output that operates.The part that controller 900 can be used as compressor set is incorporated, to provide a kind of integrated independently system effectively.In other alternative, controller 900 can keep independent and/or as the part of control system, and they also can the various operations of monitoring compressor device and joining system with it.
In one embodiment, controller 900 comprises processor 902, storage 904 and control circuit 906.The component of controller 900 is linked together by bus 908, exchanges to another component to allow signal, data and information from a component of controller 900.In one example, control circuit 906 comprises and operational condition sensor 912 (the operational condition sensor 438 of such as Fig. 4) and parameter sensors 914 (parameter sensors 440 of such as Fig. 4) joining sensor drive driving circuit 910, and with variable speed drive 918 (variable speed drive 442 of such as Fig. 4) and/or driver element 920 (driver element 110,410 of such as Fig. 1 and 4) joining variable speed drive circuit 916.Control circuit 906 also comprises and actuator 924 (such as Fig. 2, the actuator 228 of 3 and 4,328,428) joining actuator drive circuit 922, and with radio device 928(such as, operate, electronic information is started to peripheral unit 930 (such as smart phone) and/or the device receiving electronic information from peripheral unit 930 (such as smart phone) according to one or more wireless and/or wire line protocols) joining radio device drive circuit 926.Also as shown in Figure 10, storage 904 can comprise the one or more software programs 932 adopting software and/or form of firmware, and each in them can comprise one or more executable instruction being configured to be performed by processor 902.
This configuration of component can operate to analyze data by indicating controller 900, such as carried out the information of encoding by the signal from operational condition sensor 912, parameter sensors 914, variable speed drive 918 and/or driver element 920, with the service speed of the driver element 920 of the suitable orientation and/or compressor set of determining inlet guide vane.Such as, controller 900 can provide signal (or inputing or outputing), to make driver element 920 accelerate and slow down, makes inlet guide vane be changed to the second place from primary importance, and/or actuates other device of the operation changing compressor set.
Controller 900 can communicate among themselves with its structure component, and/or with perform high level logical function, other circuit (and/or device) of algorithm and executable instruction (such as firmware instructions, software instruction, software program etc.) communicates.Such exemplary circuit comprises discrete component, such as resistor, transistor, diode, switch and capacitor.The example of processor 902 comprises microprocessor and other logic device, such as field programmable gate array (" FPGA ") and specific integrated circuit (" ASIC ").Although all discrete components, circuit and device work in usual the understood mode of those of ordinary skill in electric field individually, just their combination and be integrated into function electrically organize with circuit in generally provide disclosed herein and described concept.
The element structure of controller 900 can allow to make some about selected structure and required operating characteristics and determine, selected structure and required operating characteristics are transmitted by graphical user interface by end user, or are fetched by device or need to be fetched by device.Such as, the circuit of controller 900 can physically representation theory analysis and logical operation, and/or can physical form replication strategy, comparative analysis and/or decision logic tree, it all operates to distribute and exports and/or value is distributed to output, it is one or more that this output correctly reflects in the character of change, content and starting point, they occur, and are reflected by the input to controller 900 provided by corresponding control circuit-such as control circuit 906.
In one embodiment, processor 902 is central processor unit (CPU), such as, be configured to ASIC and/or FPGA of the operation being used to indicate and/or controlling one or more device.This processor also can comprise other suitable component that state machine circuit maybe can control the operation of component as herein described.Storage 904 comprises volatile memory and nonvolatile memory, and can store the form adopting software (or firmware) instruction and configuration to arrange and/or the executable instruction comprising software (or firmware) instruction and configuration setting.Each control circuit 906 can be presented as self-contained unit, such as solid-state device.The example of these devices can be installed on substrate such as printed circuit board (PCB) and semiconductor, and it can hold various component, comprises processor 902, storage 904 and other relevant circuit, thus promotes the operation of controller 900.
But although Figure 10 shows the component of processor 902, storage 904 and control circuit 906 with the combining form of discrete circuit and separate member, situation need not be like this.Such as, one or more in these components comprise single integrated circuit (IC) or other component.As another example, processor 902 can comprise internal program memory, such as RAM and/or ROM.Similarly, one or more function of appointing of these components can distribute across extra component (such as multiple processor or other component).
In addition, as those of skill in the art will understand, aspect of the present invention can be embodied as system, method or computer program.Therefore, aspect of the present invention can adopt overall hardware embodiment, overall software implementation (comprising firmware, resident software, microcode etc.) or be combined with the form of embodiment of software and hardware aspect, and they all can be called " circuit ", " module " or " system " in this article substantially.In addition, aspect of the present invention can adopt the form of computer program, and it is implemented in one or more computer-readable mediums, implements computer readable program code above it.
Any combination of one or more computer-readable mediums can be utilized.Computer-readable medium can be computer readable signal media or computer-readable recording medium.The example of computer-readable recording medium comprise electronics, magnetic, electromagnetism and/or semiconductor system, equipment or device, or any suitable combination of foregoing teachings.The example (non-exhaustive list) particularly of computer-readable recording medium will comprise following content: the electrical connection with one or more circuit, portable computer diskette, hard disk, random access memory (RAM), ROM (read-only memory) (ROM), Erasable-Programable Read-Only Memory (EPROM or flash memory), optical fiber, portable compact discs ROM (read-only memory) (CD-ROM), light storage device, the any suitable combination of magnetic memory apparatus or aforementioned (storage).In the context of this article, " computer-readable recording medium " can be any tangible medium, and it can comprise or stored routine, to be used by the use of instruction execution system, equipment or device or combined command executive system, equipment or device.
Computer readable signal media can comprise be embodied in wherein-such as in a base band or as carrier wave a part-computer readable program code together with the data-signal propagated.This transmitting signal can adopt any one in various ways and its any suitable combination.Computer readable signal media can be any such computer-readable medium: it is not computer-readable recording medium, and can communicate, propagate or transmission procedure, to be used by instruction execution system, equipment or device or combined command executive system, equipment or device use.
The program-code embodied on a computer-readable medium can utilize any suitable medium to transmit, including, but not limited to wireless, wired, optical fiber cable, RF etc., or any suitable combination of aforementioned (medium).
Computer program code for performing the operation of aspect of the present invention can be write in any combination of one or more programming languages, comprises object oriented program language and traditional program design language.Program-code can perform completely on the user computer, partly performs as independently software kit on the user computer, partly on the user computer and partly perform on remote computer or server on the remote computer or completely.In the later case, remote computer is by the network of any type, comprise Local Area Network (LAN) or long haul network (WAN) and connect on the user computer, or this connection (such as, utilizing internet service provider and pass through Internet) can be carried out to outer computer.
To illustrate with reference to the flow chart of the method according to the embodiment of the present invention, equipment (system) and computer program herein and/or block diagram describes each aspect of the present invention.Will be appreciated that the combination of the frame in flow chart diagram and/or each frame of block diagram and flow chart diagram and/or block diagram, implement by computer program instructions.These computer program instructions can be supplied to the processor of general computer, special-purpose computer or other programmable data processing device, to produce a kind of machine, make to produce measure for the function/action of defined in the frame of flowchart and/or block diagram or multiple frame by the instruction performed by the processor of computer or other programmable data processing device.
These computer program instructions also can be stored in computer-readable medium, it can instruct computer, other programmable data processing device or other device work in the specific mode of one, makes the instruction be stored in computer-readable medium produce the manufacture thing of the instruction of the function/action of defined in the frame or multiple frame comprising flowchart and/or block diagram.
Computer program instructions also can be loaded on computer, other programmable data processing device or other device, to make to perform sequence of operations step on computer, other programmable device or other device, to produce executive program, the instruction performed on computer or other programmable device is made to be provided for the method for the function/action of defined in the frame of flowchart and/or block diagram or multiple frame.
Therefore, the technique effect of the embodiment of system and method in this paper is the operation setting determining compressor set, the position of such as inlet guide vane and actuating speed, to realize one or more set point, and/or in one example, under this operation setting, operate compressor set, and/or in one example, location inlet guide vane and actuating speed, to reduce the power consumpiton of compressor set.
As used herein, quote in the singular, and hat has the element of wording " one " or function should be understood to not get rid of the plural number of described element or function, situation unless such exclusion is explicitly stated above.In addition, the existence that should not be understood to get rid of the other embodiment also combining stated feature is quoted to " embodiment " of claimed invention.
This printed instructions uses the open the present invention of example, comprises optimal mode, and any technician in related domain can be enable to put into practice the present invention, comprise and manufacture and use any device or system, and perform any combined method.The present invention can the scope of patented protection be defined by the claims, and can comprise other example that those of skill in the art expect.If these other examples have the structural element being not different from the written language of claim, if or it comprises with claim that written language is without the structural element of the equivalence of essence difference, so these other examples are all intended to be in the scope of claim.
Claims (24)
1. a system, comprising:
Compressor set, it comprises impeller, to circulate the inlet guide vane be connected with the joining driver element of described impeller and with described impeller;
Controller joining with described compressor set, described controller comprises processor, storage and storage on a memory and be configured to the executable instruction that performed by described processor, and described executable instruction comprises such instruction, its for:
Receive the first signal that first group of operational condition of described compressor set is encoded;
First set point is converted to the second set point of described compressor set, described second set point is corresponding with the second group of operational condition being different from described first group of operational condition;
Select the operation setting of described compressor set to realize described second set point; And
Produce and export, it is to instruction encoding, to operate described compressor set according to described operation setting.
2. system according to claim 1, is characterized in that, described second set point determines the value of the inlet volumetric flow of the working fluid of described impeller upstream.
3. system according to claim 1, is characterized in that, described second set point determines the head pressure of the working fluid near the outlet of described compressor set.
4. system according to claim 1, is characterized in that, described operation setting determines the position of described inlet guide vane.
5. system according to claim 1, is characterized in that, described operation setting determines the actuating speed of described driver element.
6. system according to claim 1, is characterized in that, described first group of operational condition and described second group of operational condition are included in the described environment temperature of compressor set operation period and the value of ambient pressure.
7. system according to claim 6, is characterized in that, described second set point according to:
calculate,
Wherein, SP
secondthe second set point under described second group of operational condition, SP
firstthe first set point under described first group of operational condition, P
firstthe ambient pressure of described first group of operational condition, P
secondthe ambient pressure of described second group of operational condition, T
firstthe environment temperature of described first group of operational condition, and T
secondit is the environment temperature of described second group of operational condition.
8. system according to claim 6, is characterized in that, described executable instruction comprises such instruction, its for:
Calculate the value of the adiabatic head under described first group of operational condition, and
For described second set point selective value, it is corresponding with the value of the adiabatic head under described second group of operational condition,
The value of wherein said adiabatic head according to:
calculate,
Wherein, Head
adiabaticbe the adiabatic head of environment temperature under described first group of operational condition and ambient pressure, k is the ratio of heat capacities of described working fluid, Z
abe the average gas compressibility coefficient of described working fluid, R is the gas constant of described working fluid, and MW is the molecular weight of described working fluid, T
1the environment temperature under described first group of operational condition, P
1the ambient pressure under described first group of operational condition, and P
2it is the head pressure under surge.
9. system according to claim 1, is characterized in that, also comprises such instruction, its for:
The threshold value of described second set point with the failure condition corresponding to described compressor set is compared; And
If described second set point meets or is less than described threshold value, then regulate the operation of described compressor set according to described operation setting.
10. system according to claim 9, is characterized in that, described threshold value defines the minimum inlet volumetric flow for preventing compressor surge.
11. systems according to claim 1, is characterized in that, also comprise such instruction, its for:
For described operation setting selects the first value and the second value, described first value is corresponding with the upper value of described second set point and the lower value of described second set point respectively with the second value; And
Calculate the requirements of described operation setting, wherein said requirements according to:
calculate,
Wherein, OP
rvthe requirements of described operation setting, OP
lvthe first value of described operation setting, OP
uvthe second value of described operation setting, SP
rvthe value of described second set point, SP
lvthe lower value of described second set point, and SP
uvit is the upper value of described second set point.
12. systems according to claim 11, is characterized in that, described second set point comprises the head pressure of the working fluid from described compressor set.
13. systems according to claim 11, it is characterized in that, also comprise the variable frequency driver connected with described driver element, described variable frequency driver produces the motor input defining motor incoming frequency and motor input voltage, and it is one or more that wherein said instruction defines in described motor incoming frequency and described input voltage.
14. 1 kinds of compressor sets, comprising:
Controller, it comprises processor, storage and storage on a memory and be configured to the executable instruction that performed by described processor, and described executable instruction comprises such instruction, its for:
Receive the signal that first group of operational condition of described compressor set is encoded;
First set point is converted to the second set point of described compressor set, described second set point is corresponding with the second group of operational condition being different from described first group of operational condition;
Select the operation setting of described compressor set to realize described second set point; And
Produce and export, it is to instruction encoding, to operate described compressor set according to described operation setting.
15. 1 kinds of controllers for operate compressor device, described controller comprises:
Processor;
Storage; With
Store on a memory and be configured to the executable instruction that performed by described processor, described executable instruction is used for:
Receive the first signal that first group of operational condition of described compressor set is encoded;
First set point is converted to the second set point of described compressor set, described second set point is corresponding with the second group of operational condition being different from described first group of operational condition;
Select the first operation setting of described compressor set to realize described second set point; And
Produce and export, it is to instruction encoding, to operate described compressor set according to described first operation setting.
16. controllers according to claim 15, is characterized in that, also comprise such executable instruction, its for:
For described operation setting selects the first value and the second value, described first value is corresponding with the upper value of described second set point and the lower value of described second set point respectively with the second value; And
Calculate the requirements of described operation setting, wherein said requirements according to:
calculate,
Wherein, OP
rvthe requirements of described operation setting, OP
lvthe first value of described operation setting, OP
uvthe second value of described operation setting, SP
rvthe value of described second set point, SP
lvthe lower value of described second set point, and SP
uvit is the upper value of described second set point.
17. controllers according to claim 15, is characterized in that, also comprise such instruction, its for:
According to:
calculate described second set point,
Wherein, SP
firstdescribed first set point, SP
seconddescribed second set point, P
firstthe ambient pressure of described first group of operational condition, P
secondthe ambient pressure of described second group of operational condition, T
firstthe environment temperature of described first group of operational condition, and T
secondit is the environment temperature of described second group of operational condition.
18. controllers according to claim 15, is characterized in that, also comprise such instruction, its for:
Calculate the value of adiabatic head, and
For described second set point selects the value corresponding with the value of described adiabatic head,
The value of wherein said adiabatic head according to:
calculate,
Wherein, Head
adiabaticbe about the described environment temperature of compressor set operation period and the adiabatic head of ambient pressure, k is the ratio of heat capacities of described working fluid, Z
abe the average gas compressibility coefficient of described working fluid, R is the gas constant of described working fluid, and MW is the molecular weight of described working fluid, T
1described environment temperature, P
1described ambient pressure, and P
2it is the head pressure under surge.
19. controllers according to claim 15, is characterized in that, also comprise such instruction, its for:
Receive secondary signal, first value of described secondary signal to the operating parameter of the described compressor set operated according to the primary importance of inlet guide vane is encoded;
Receive the 3rd signal, second value of described 3rd signal to the described operating parameter of the described compressor set operated according to the second place of inlet guide vane is encoded;
More described first value and described second value;
Select to change described second place increment used, described increment defines the relative position of described second value relative to described first value; And
Produce and export, it is to instruction encoding, moves according to described increment to make described inlet guide vane from the described second place.
20. controllers according to claim 19, is characterized in that, described operating parameter comprises the input power value of described driver element.
21. controllers according to claim 15, is characterized in that, also comprise such instruction, its for:
Receive secondary signal, described secondary signal is encoded to the first the first value arranging the operating parameter of the described compressor set operated according to variable speed drive;
Receive the 3rd signal, described 3rd signal is encoded to the second the second value arranging the described operating parameter of the described compressor set operated according to described variable speed drive;
More described first value and described second value;
Select to change described second operation setting increment used, described increment defines the relative position of described second value relative to described first value; And
Produce and export, it is to instruction encoding, arranges move according to described increment to make described second.
22. controllers according to claim 21, is characterized in that, described operating parameter comprises the input power value of described driver element.
23. controllers according to claim 21, is characterized in that, described operating parameter comprises power delivery value, and its measurement is applied to the moment of torsion on described impeller by described driver element.
24. 1 kinds of computer programs for improvement of the efficiency of compressor set, described computer program comprises computer-readable recording medium, described computer-readable recording medium has the executable instruction be implemented on wherein, wherein said executable instruction comprises such a or multiple executable instruction, its for:
Receive the signal that first group of operational condition of described compressor set is encoded;
First set point is converted to the second set point of described compressor set, described second set point is corresponding with the second group of operational condition being different from described first group of operational condition;
Select the operation setting of described compressor set to realize described second set point; And
Produce and export, it is to instruction encoding, to operate described compressor set according to described operation setting.
Applications Claiming Priority (3)
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|---|---|---|---|
| US13/601862 | 2012-08-31 | ||
| US13/601,862 US20140064948A1 (en) | 2012-08-31 | 2012-08-31 | System and method for operating a compressor device |
| PCT/US2013/056101 WO2014035779A2 (en) | 2012-08-31 | 2013-08-22 | System and method for operating a compressor drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104884814A true CN104884814A (en) | 2015-09-02 |
Family
ID=49085220
Family Applications (1)
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|---|---|---|---|
| CN201380056571.0A Pending CN104884814A (en) | 2012-08-31 | 2013-08-22 | System and method for operating a compressor drive |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20140064948A1 (en) |
| EP (1) | EP2909481A2 (en) |
| CN (1) | CN104884814A (en) |
| BR (1) | BR112015004604A2 (en) |
| RU (1) | RU2015107883A (en) |
| WO (1) | WO2014035779A2 (en) |
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| CN105090086A (en) * | 2015-09-24 | 2015-11-25 | 哈尔滨汽轮机厂有限责任公司 | Anti-surge method applied when axial flow compressor adjusts air volume and air pressure |
| CN107559230A (en) * | 2017-09-19 | 2018-01-09 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of wind-tunnel Silence Process axial flow compressor surge preventing system using interpolation arithmetic |
| WO2018209773A1 (en) * | 2017-05-18 | 2018-11-22 | 广东美的制冷设备有限公司 | Compressor driving system, and method and device for controlling same |
| TWI677660B (en) * | 2017-09-25 | 2019-11-21 | 美商江森自控技術公司 | Two piece split scroll for centrifugal compressor |
| TWI742493B (en) * | 2019-04-22 | 2021-10-11 | 中國商復盛實業（上海）有限公司 | Centrifugal air compressor |
| CN113586476A (en) * | 2020-04-30 | 2021-11-02 | 马勒国际有限公司 | Side channel compressor for compressing gas |
| US11781559B2 (en) | 2020-04-30 | 2023-10-10 | Mahle International Gmbh | Side channel compressor for compressing gas |
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| CN115559913A (en) * | 2018-01-19 | 2023-01-03 | 概创机械设计有限责任公司 | Turbine with separate collectors |
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| US11781559B2 (en) | 2020-04-30 | 2023-10-10 | Mahle International Gmbh | Side channel compressor for compressing gas |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2015107883A (en) | 2016-10-20 |
| BR112015004604A2 (en) | 2017-07-04 |
| US20140064948A1 (en) | 2014-03-06 |
| EP2909481A2 (en) | 2015-08-26 |
| WO2014035779A2 (en) | 2014-03-06 |
| WO2014035779A3 (en) | 2014-05-30 |
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