WO2014196497A1 - ターボ冷凍機 - Google Patents
ターボ冷凍機 Download PDFInfo
- Publication number
- WO2014196497A1 WO2014196497A1 PCT/JP2014/064607 JP2014064607W WO2014196497A1 WO 2014196497 A1 WO2014196497 A1 WO 2014196497A1 JP 2014064607 W JP2014064607 W JP 2014064607W WO 2014196497 A1 WO2014196497 A1 WO 2014196497A1
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- WO
- WIPO (PCT)
- Prior art keywords
- flow path
- refrigerant
- economizer
- phase component
- turbo
- Prior art date
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- 239000003507 refrigerant Substances 0.000 claims description 114
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000002826 coolant Substances 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 70
- 239000012071 phase Substances 0.000 description 38
- 239000007788 liquid Substances 0.000 description 25
- 230000006835 compression Effects 0.000 description 16
- 238000007906 compression Methods 0.000 description 16
- 239000003921 oil Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000001133 acceleration Effects 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000012808 vapor phase Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007792 gaseous phase Substances 0.000 description 2
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/053—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of turbine type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
- F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
- F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/01—Geometry problems, e.g. for reducing size
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/006—Cooling of compressor or motor
- F25B31/008—Cooling of compressor or motor by injecting a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
- F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
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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
Definitions
- the present invention relates to a turbo refrigerator.
- This application claims priority based on Japanese Patent Application No. 2013-117737 for which it applied to Japan on June 4, 2013, and uses the content here.
- refrigerant is circulated between a condenser and an evaporator, the refrigerant compressed by the turbo compressor is condensed by the condenser, and the condensed refrigerant is evaporated by the evaporator.
- refrigerant is circulated between a condenser and an evaporator, the refrigerant compressed by the turbo compressor is condensed by the condenser, and the condensed refrigerant is evaporated by the evaporator.
- Patent Document 1 In order to efficiently vaporize the refrigerant in the evaporator, it is desirable that the vapor phase component contained in the refrigerant supplied to the evaporator is small. For this reason, for example, as shown in Patent Document 1, an economizer is installed in front of the evaporator, the vapor phase component of the refrigerant supplied to the economizer is removed, and the vapor phase component of the removed refrigerant is returned to the turbo compressor. is doing.
- Patent Document 2 and Patent Document 3 disclose detailed configurations of the parts where the gas phase component of the refrigerant removed from the economizer in Patent Document 1 is returned to the turbo compressor.
- the pipe for supplying the gas phase component of the refrigerant separated by the economizer to the turbo compressor has the same diameter up to the turbo compressor and is connected to the turbo compressor at a right angle.
- the pipe when the pipe is thick, the flow velocity in the pipe becomes slow, and acceleration loss is generated when it joins the main stream flowing in the turbo compressor.
- the pressure loss in the pipe is increased, and the pressure in the economizer is not sufficiently lowered (the pressure cannot be pulled), so that the refrigerant is not sufficiently evaporated in the economizer.
- the present invention has been made in view of the above-described circumstances, and in a turbo refrigerator equipped with an economizer, the gas-liquid separation in the economizer is satisfactorily performed and the acceleration loss when supplying the gas phase component of the refrigerant to the turbo compressor is reduced.
- the purpose is to reduce.
- a first aspect of the present invention is a turbo refrigerator including a turbo compressor to which a gas phase component of a refrigerant from an economizer is supplied, wherein the turbo compressor includes a first flow path through which a compressed refrigerant gas flows, A connection pipe connected to the first flow path and a second flow path through which the gas phase component of the refrigerant flows, and the diameter of the connection pipe is from the second flow path toward the first flow path. It is a turbo refrigerator that is shrinking.
- the overall pressure loss of the second flow path and the connection pipe is such that the gas phase component of the refrigerant flows from the economizer into the second flow path.
- This is a turbo refrigerator that has a possible value.
- a third aspect of the present invention is the turbo refrigerator according to the first aspect, wherein the pipes constituting the second flow path have the same diameter.
- the turbo refrigerator in which the gas phase components of the refrigerant flowing through the second flow path merge along the compressed refrigerant gas flowing through the first flow path. It is.
- a fifth aspect of the present invention is the turbo refrigerator according to the first aspect, wherein the first flow path is constituted by an elbow pipe.
- a sixth aspect of the present invention is the turbo refrigerator according to the fifth aspect, wherein the angle of the outlet with respect to the inlet of the elbow pipe is 180 degrees.
- a seventh aspect of the present invention is the turbo refrigerator according to the fifth aspect, wherein the refrigerant gas phase component flowing in the second flow path is spirally supplied to the elbow pipe.
- the elbow pipe is provided separately from the third flow path through which the gas phase component of the refrigerant from an economizer different from the economizer flows, and the connecting pipe. It is a turbo refrigerator which further has another connecting pipe connected with.
- the turbo refrigerator includes a turbo compressor to which a gas phase component of the refrigerant from the economizer is supplied, and the turbo compressor includes a compressed refrigerant gas.
- a connection pipe connected to the first flow path and the second flow path through which the gas phase component of the refrigerant flows, and the diameter of the connection pipe on the first flow path side is the connection pipe on the second flow path side. This is a centrifugal chiller smaller than the diameter.
- the return part has a throttle part. For this reason, the flow path area can be widened at the inlet portion of the return flow portion on the economizer side, and the speed of the gas phase component of the refrigerant discharged from the return flow portion can be increased. Therefore, according to the present invention, it is possible to suppress an increase in pressure loss in the return portion and perform gas-liquid separation in the economizer satisfactorily, and to reduce acceleration loss when merging with the main flow in the turbo compressor.
- turbo refrigerator in one embodiment of the present invention. It is an expansion schematic diagram including the channel and economizer connection pipe with which the turbo refrigerator in one embodiment of the present invention is provided.
- FIG. 1 is a system diagram of a turbo refrigerator 1 in an embodiment of the present invention.
- the turbo refrigerator 1 includes a condenser 2, an economizer 3, an evaporator 4, a turbo compressor 5, an expansion valve 6, and an expansion valve 7.
- the condenser 2 is connected to the gas discharge pipe 5a of the turbo compressor 5 through the flow path R1.
- the refrigerant (compressed refrigerant gas X1) compressed by the turbo compressor 5 is supplied to the condenser 2 through the flow path R1.
- the condenser 2 liquefies this compressed refrigerant gas X1.
- the condenser 2 includes a heat transfer tube 2a through which cooling water flows, and cools and liquefies the compressed refrigerant gas X1 by heat exchange between the compressed refrigerant gas X1 and the cooling water.
- a refrigerant chlorofluorocarbon or the like can be used.
- the compressed refrigerant gas X1 is cooled by heat exchange with the cooling water, liquefied, becomes refrigerant liquid X2, and accumulates at the bottom of the condenser 2.
- the bottom of the condenser 2 is connected to the economizer 3 via the flow path R2.
- the flow path R2 is provided with an expansion valve 6 for decompressing the refrigerant liquid X2.
- the economizer 3 is supplied with the refrigerant liquid X2 decompressed by the expansion valve 6 through the flow path R2.
- the economizer 3 temporarily stores the refrigerant liquid X2 that has been discharged from the condenser 2 and decompressed by the expansion valve 6, and separates the refrigerant into a liquid phase and a gas phase.
- the top of the economizer 3 is connected to the economizer connecting pipe 5b of the turbo compressor 5 through the flow path R3.
- the refrigerant gas phase component X3 separated by the economizer 3 is supplied to the second compression stage 12 (described later) through the flow path R3 without passing through the evaporator 4 and the first compression stage 11 (described later). Increase efficiency.
- the bottom of the economizer 3 is connected to the evaporator 4 via a flow path R4.
- the flow path R4 is provided with an expansion valve 7 for further reducing the pressure of the refrigerant liquid X2.
- the evaporator 4 is supplied with the refrigerant liquid X2 further decompressed by the expansion valve 7 through the flow path R4.
- the evaporator 4 evaporates the refrigerant liquid X2 and cools the cold water with the heat of vaporization.
- the evaporator 4 includes a heat transfer tube 4a through which cold water flows, and cools the cold water and evaporates the refrigerant liquid X2 by heat exchange between the refrigerant liquid X2 and the cold water.
- Refrigerant liquid X2 takes heat by heat exchange with cold water and evaporates to become refrigerant gas X4.
- the top of the evaporator 4 is connected to a gas suction pipe 5c of the turbo compressor 5 via a flow path R5.
- the refrigerant gas X4 evaporated in the evaporator 4 is supplied to the turbo compressor 5 through the flow path R5.
- the turbo compressor 5 compresses the evaporated refrigerant gas X4 and supplies it to the condenser 2 as the compressed refrigerant gas X1.
- the turbo compressor 5 is a two-stage compressor that includes a first compression stage 11 that compresses the refrigerant gas X4 and a second compression stage 12 that further compresses the refrigerant compressed in one stage.
- the first compression stage 11 is provided with an impeller 13, and the second compression stage 12 is provided with an impeller 14, which are connected by a rotating shaft 15.
- the turbo compressor 5 has a motor 10, and the impeller 13 and the impeller 14 are rotated by the motor 10 to compress the refrigerant.
- the impeller 13 and the impeller 14 are radial impellers, and lead out the refrigerant sucked in the axial direction in the radial direction.
- the gas intake pipe 5c is provided with an inlet guide vane 16 for adjusting the intake amount of the first compression stage 11.
- the inlet guide vane 16 is rotatable so that the apparent area from the flow direction of the refrigerant gas X4 can be changed.
- a diffuser flow path is provided around each of the impeller 13 and the impeller 14, and the refrigerant led out in the radial direction is compressed and boosted in the diffuser flow path. Further, the refrigerant can be supplied to the next compression stage through a scroll passage provided around the diffuser passage.
- An outlet throttle valve 17 is provided around the impeller 14, and the discharge amount from the gas discharge pipe 5a can be controlled.
- the turbo compressor 5 includes a sealed casing 20.
- the interior of the housing 20 is partitioned into a compression flow path space S1, a first bearing housing space S2, a motor housing space S3, a gear unit housing space S4, and a second bearing housing space S5.
- the impeller 13 and the impeller 14 are provided in the compression flow path space S1.
- the rotating shaft 15 that connects the impeller 13 and the impeller 14 is provided so as to be inserted into the compression flow path space S1, the first bearing housing space S2, and the gear unit housing space S4.
- a bearing 21 that supports the rotary shaft 15 is provided in the first bearing housing space S2.
- a stator 22, a rotor 23, and a rotating shaft 24 connected to the rotor 23 are provided in the motor housing space S3, a stator 22, a rotor 23, and a rotating shaft 24 connected to the rotor 23 are provided.
- the rotating shaft 24 is provided so as to be inserted into the motor housing space S3, the gear unit housing space S4, and the second bearing housing space S5.
- a bearing 31 that supports the non-load side of the rotary shaft 24 is provided in the second bearing housing space S5.
- a gear unit 25, a bearing 26 and a bearing 27, and an oil tank 28 are provided in the gear unit housing space S4.
- the gear unit 25 has a large-diameter gear 29 fixed to the rotary shaft 24 and a small-diameter gear 30 fixed to the rotary shaft 15 and meshed with the large-diameter gear 29.
- the gear unit 25 transmits the rotational force so that the rotation speed of the rotation shaft 15 increases (acceleration) with respect to the rotation speed of the rotation shaft 24.
- the bearing 26 supports the rotating shaft 24.
- the bearing 27 supports the rotating shaft 15.
- the oil tank 28 stores lubricating oil supplied to each sliding portion such as the bearing 21, the bearing 26, the bearing 27, and the bearing 31.
- Such a casing 20 is provided with a seal mechanism 32 and a seal mechanism 33 for sealing the periphery of the rotary shaft 15 between the compression flow path space S1 and the first bearing housing space S2.
- the casing 20 is provided with a seal mechanism 34 that seals the periphery of the rotary shaft 15 between the compression flow path space S1 and the gear unit accommodation space S4.
- the casing 20 is provided with a seal mechanism 35 that seals the periphery of the rotary shaft 24 between the gear unit accommodation space S4 and the motor accommodation space S3.
- the casing 20 is provided with a seal mechanism 36 that seals the periphery of the rotary shaft 24 between the motor housing space S3 and the second bearing housing space S5.
- the motor housing space S3 is connected to the condenser 2 via a flow path R6.
- the refrigerant liquid X2 is supplied from the condenser 2 to the motor housing space S3 through the flow path R6.
- the refrigerant liquid X2 supplied to the motor housing space S3 circulates around the stator 22, and cools the motor housing space S3 by heat exchange between the stator 22 and its surroundings.
- the motor housing space S3 is connected to the evaporator 4 via the flow path R6.
- the evaporator 4 is supplied with the refrigerant liquid X2 that has lost heat in the motor housing space S3 through the flow path R7.
- the oil tank 28 has an oil supply pump 37.
- the oil supply pump 37 is connected to the second bearing housing space S5 via a flow path R8, for example.
- Lubricating oil is supplied from the oil tank 28 to the second bearing housing space S5 through the flow path R8.
- Lubricating oil supplied to the second bearing housing space S5 is supplied to the bearing 31 to ensure lubricity of the sliding portion of the rotating shaft 24 and to suppress (cool) heat generation of the sliding portion.
- the second bearing housing space S5 is connected to the oil tank 28 via the flow path R9.
- the lubricating oil supplied to the second bearing housing space S5 returns to the oil tank 28 through the flow path R9.
- the compressed refrigerant gas X1 is cooled and condensed by the cooling water in the condenser 2 and is exhausted by heating the cooling water.
- the refrigerant liquid X2 generated by condensing in the condenser 2 is decompressed by the expansion valve 6 and supplied to the economizer 3, and after the vapor phase component X3 of the refrigerant has been separated, the refrigerant liquid X2 is further decompressed by the expansion valve 7 and is evaporated. To be supplied.
- the gas phase component X3 of the refrigerant is supplied to the turbo compressor 5 via the flow path R3.
- the refrigerant liquid X2 supplied to the evaporator 4 evaporates in the evaporator 4 and thereby takes the heat of the cold water to cool the cold water. Thereby, the heat of the cold water before cooling is substantially transported to the cooling water supplied to the condenser 2.
- the refrigerant gas X4 generated by evaporating the refrigerant liquid X2 is supplied to the turbo compressor 5 and compressed, and then supplied to the condenser 2 again.
- a part of the refrigerant liquid X2 accumulated in the condenser 2 is supplied to the motor housing space S3 via the flow path R6.
- the refrigerant liquid X2 supplied to the motor housing space S3 through the flow path R6 cools the motor 10 housed in the motor housing space S3, and then returns to the evaporator 4 through the flow path R7.
- the lubricating oil flowing through the flow path R8 is supplied to the first bearing housing space S2, the second bearing housing space S5, and the gear unit housing space S4, and reduces the sliding resistance of the bearing 21, the gear unit 25, and the like.
- the flow path R3 and the economizer connecting pipe 5b merge the gas phase component X3 of the refrigerant separated by the economizer 3 with the flow (main flow) of the compressed refrigerant gas X1 in the turbo compressor 5.
- the flow path R3 and the economizer connecting pipe 5b function as a return section that returns the gas phase component X3 of the refrigerant separated by the economizer 3 to the turbo compressor 5.
- the flow path R3 is a pipe having the same diameter, and the pressure loss of the flow path R3 and the economizer connecting pipe 5b as a whole is almost equal to the amount of the gas phase component X3 of the refrigerant gas-liquid separated by the economizer 3 from the economizer 3.
- the diameter is set to a value that can flow into R3.
- the return portion of the turbo compressor 5 to which the gas phase component X3 of the refrigerant separated by the economizer 3 is returned is the elbow pipe 20a.
- elbow pipe 20a be the 1st channel R10.
- the elbow pipe 20a is a 180 ° elbow pipe in which the inlet 20b and the outlet 20c face in opposite directions.
- the economizer connection pipe 5b is connected to the elbow pipe 20a from the tangential direction.
- the economizer connecting pipe 5b is directly connected to the elbow pipe 20a and has a throttle flow path whose diameter is reduced from the flow path R3 side toward the elbow pipe 20a.
- Such an economizer connecting pipe 5b increases the flow rate of the gas phase component X3 of the refrigerant flowing from the flow path R3, and is tangential to the elbow pipe 20a along the compressed refrigerant gas X1 flowing in the elbow pipe 20a.
- the gas phase component X3 of the refrigerant is supplied. Therefore, the gas phase component X3 of the refrigerant flowing through the flow path R3 merges along the compressed refrigerant gas flowing through the elbow pipe 20a.
- the turbo refrigerator 1 of this embodiment having such a configuration includes an economizer connecting pipe 5b having a throttle channel. That is, in the turbo refrigerator 1 of the present embodiment including the turbo compressor 5 to which the refrigerant gas phase component X3 from the economizer 3 is supplied, the turbo compressor 5 includes an elbow pipe 20a through which the compressed refrigerant gas X1 flows, The economizer connecting pipe 5b connected to the pipe 20a and the flow path R3 through which the gas phase component X3 of the refrigerant flows. The diameter of the economizer connecting pipe 5b is reduced from the flow path R3 toward the elbow pipe 20a.
- the turbo compressor 5 in the turbo refrigerator 1 of the present embodiment including the turbo compressor 5 to which the refrigerant gas phase component X3 from the economizer 3 is supplied, the turbo compressor 5 includes an elbow pipe 20a through which the compressed refrigerant gas X1 flows, And an economizer connecting pipe 5b connected to the flow path R3 through which the gas phase component X3 of the refrigerant flows.
- the economizer connecting pipe 5b on the elbow pipe 20a side has an economizer connecting pipe 5b on the flow path R3 side. Smaller than the diameter.
- the flow path area of the flow path R3 on the economizer 3 side corresponding to the entrance portion can be increased, and the speed of the gas phase component X3 of the refrigerant discharged toward the elbow pipe 20a can be increased. Therefore, according to the turbo refrigerator 1 of the present embodiment, the gas-liquid separation in the economizer 3 is satisfactorily performed while suppressing increase in the overall pressure loss of the economizer connecting pipe 5b and the flow path R3, and the elbow pipe 20a. Acceleration loss when merging with the mainstream can be reduced.
- the gas phase component X3 of the refrigerant supplied from the economizer connecting pipe 5b to the elbow pipe 20a is supplied along the flow of the compressed refrigerant gas X1 flowing through the elbow pipe 20a. .
- it can suppress that a turbulent flow generate
- the return portion of the turbo compressor 5 to which the gas phase component X3 of the refrigerant separated by the economizer 3 is returned is the elbow pipe 20a.
- This elbow pipe The refrigerant gas phase component X3 is supplied into the elbow 20a from the tangential direction of 20a. For this reason, it becomes possible to join the gas phase component X3 of the refrigerant along the flow of the compressed refrigerant gas X1 with a simple configuration.
- the configuration in which the elbow pipe 20a is the place where the gas phase component X3 of the refrigerant separated by the economizer 3 is returned is not limited to this.
- the straight pipe can be used as a return portion of the gas phase component X3 of the refrigerant. It is desirable to supply the vapor phase component X3 of the returned refrigerant to the straight pipe as much as possible along the main flow in the straight pipe.
- tube 20a was demonstrated.
- the present invention is not limited to this, and the gas phase component X3 of the refrigerant may be spirally supplied to a pipe through which the main flow such as the elbow pipe 20a flows.
- tube 20a was demonstrated.
- the present invention is not limited to this, and a plurality of economizer connecting pipes 5b may be connected to the elbow pipe 20a, and the flow path R3 may be branched so as to be connected to each economizer connecting pipe 5b.
- the third flow path through which the gas phase component X3 of the refrigerant flows from the economizer connecting pipe 5x different from the economizer connecting pipe 5b, and the elbow pipe 20a are connected separately from the economizer connecting pipe 5b.
- You may further have a pipe
- the elbow pipe 20a is the first flow path R10.
- the first flow path R10 is not limited to the elbow pipe 20a, and a joint or the like normally used in this field may be used.
- the return portion has the throttle portion. For this reason, the flow path area can be widened at the inlet portion of the return flow portion on the economizer side, and the speed of the gas phase component of the refrigerant discharged from the return flow portion can be increased. Therefore, according to the present invention, it is possible to suppress an increase in pressure loss in the return portion and perform gas-liquid separation in the economizer satisfactorily, and to reduce acceleration loss when merging with the main flow in the turbo compressor.
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Abstract
Description
本願は、2013年6月4日に日本国に出願された特願2013-117737号に基づき優先権を主張し、その内容をここに援用する。
特許文献2や特許文献3には、特許文献1において、エコノマイザから取り除いた冷媒の気相成分がターボ圧縮機に返流される部位の詳細な構成が、それぞれ開示されている。
蒸発器4は、冷水が流通する伝熱管4aを備え、冷媒液X2と冷水との熱交換によって、冷水を冷却すると共に冷媒液X2を蒸発させる。冷媒液X2は、冷水との間の熱交換によって熱を奪って蒸発し、冷媒ガスX4となる。蒸発器4の頂部は、流路R5を介してターボ圧縮機5のガス吸入管5cと接続されている。ターボ圧縮機5には、蒸発器4において蒸発した冷媒ガスX4が流路R5を通って供給される。
即ち、エコノマイザ3からの冷媒の気相成分X3が供給されるターボ圧縮機5を含む本実施形態のターボ冷凍機1では、ターボ圧縮機5は、圧縮冷媒ガスX1が流れるエルボ管20aと、エルボ管20a及び冷媒の気相成分X3が流れる流路R3と接続されたエコノマイザ連結管5bと、を含み、エコノマイザ連結管5bの径は、流路R3からエルボ管20aに向かって縮小している。
換言すると、エコノマイザ3からの冷媒の気相成分X3が供給されるターボ圧縮機5を含む本実施形態のターボ冷凍機1では、ターボ圧縮機5は、圧縮冷媒ガスX1が流れるエルボ管20aと、エルボ管20a及び冷媒の気相成分X3が流れる流路R3と接続されたエコノマイザ連結管5bと、を含み、エルボ管20a側のエコノマイザ連結管5bの径は、流路R3側のエコノマイザ連結管5bの径よりも小さい。
このため、入り口部分に相当するエコノマイザ3側の流路R3の流路面積を広くし、かつ、エルボ管20a内に向けて吐出される冷媒の気相成分X3の速度を増加させることができる。したがって、本実施形態のターボ冷凍機1によれば、エコノマイザ連結管5bと流路R3とを合わせた全体の圧力損失の増大を抑えてエコノマイザ3における気液分離を良好に行うと共に、エルボ管20aの主流と合流するときの加速損失を低減させることができる。
換言すると、エコノマイザ連結管5bとは別のエコノマイザ連結管5xから冷媒の気相成分X3が流れる第3流路、及びエルボ管20aと接続され、エコノマイザ連結管5bとは別に設けられた別の連結管をさらに有しても良い。
上記実施形態においては、エルボ管20aを第1流路R10としたが、第1流路R10はエルボ管20aに限定されず、当分野において通常用いられる継手等を使用しても良い。
Claims (9)
- エコノマイザからの冷媒の気相成分が供給されるターボ圧縮機を含むターボ冷凍機であって、
前記ターボ圧縮機は、圧縮冷媒ガスが流れる第1流路と、前記第1流路及び前記冷媒の気相成分が流れる第2流路と接続された連結管と、を含み、前記連結管の径は、前記第2流路から前記第1流路に向かって縮小している、ターボ冷凍機。 - 前記第2流路及び前記連結管の全体の圧力損失は、前記冷媒の気相成分が前記エコノマイザから前記第2流路に流れ込むことが可能な値である、請求項1に記載のターボ冷凍機。
- 前記第2流路を構成する配管は、同一の径を有する、請求項1に記載のターボ冷凍機。
- 前記第2流路を流れる前記冷媒の気相成分は、前記第1流路を流れる前記圧縮冷媒ガスに沿って合流する、請求項1に記載のターボ冷凍機。
- 前記第1流路は、エルボ管で構成される、請求項1に記載のターボ冷凍機。
- 前記エルボ管の入口に対する出口の角度が180度である、請求項5に記載のターボ冷凍機。
- 前記第2流路を流れる前記冷媒の気相成分は、前記エルボ管に対して螺旋状に供給される、請求項5に記載のターボ冷凍機。
- 前記エコノマイザとは別のエコノマイザからの冷媒の気相成分が流れる第3流路、及び
前記連結管とは別に設けられ前記エルボ管と接続された別の連結管をさらに有する、請求項5に記載のターボ冷凍機。 - エコノマイザからの冷媒の気相成分が供給されるターボ圧縮機を含むターボ冷凍機であって、
前記ターボ圧縮機は、圧縮冷媒ガスが流れる第1流路及び前記冷媒の気相成分が流れる第2流路と接続された連結管を含み、前記第1流路側の前記連結管の径は、前記第2流路側の前記連結管の径よりも小さい、ターボ冷凍機。
Priority Applications (4)
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EP14807005.5A EP3006860B8 (en) | 2013-06-04 | 2014-06-02 | Turbo refrigerator |
CN201480030557.8A CN105393067B (zh) | 2013-06-04 | 2014-06-02 | 涡轮冷冻机 |
US14/895,605 US9879886B2 (en) | 2013-06-04 | 2014-06-02 | Turbo refrigerator |
JP2015521437A JP6123889B2 (ja) | 2013-06-04 | 2014-06-02 | ターボ冷凍機 |
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JP2013-117737 | 2013-06-04 | ||
JP2013117737 | 2013-06-04 |
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PCT/JP2014/064607 WO2014196497A1 (ja) | 2013-06-04 | 2014-06-02 | ターボ冷凍機 |
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US (1) | US9879886B2 (ja) |
EP (1) | EP3006860B8 (ja) |
JP (1) | JP6123889B2 (ja) |
CN (1) | CN105393067B (ja) |
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WO (1) | WO2014196497A1 (ja) |
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US11105544B2 (en) | 2016-11-07 | 2021-08-31 | Trane International Inc. | Variable orifice for a chiller |
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- 2014-06-02 EP EP14807005.5A patent/EP3006860B8/en active Active
- 2014-06-02 WO PCT/JP2014/064607 patent/WO2014196497A1/ja active Application Filing
- 2014-06-02 MY MYPI2015704413A patent/MY177829A/en unknown
- 2014-06-02 JP JP2015521437A patent/JP6123889B2/ja not_active Expired - Fee Related
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EP3006860A4 (en) | 2017-03-29 |
EP3006860A1 (en) | 2016-04-13 |
CN105393067A (zh) | 2016-03-09 |
US9879886B2 (en) | 2018-01-30 |
MY177829A (en) | 2020-09-23 |
EP3006860B8 (en) | 2021-09-15 |
JP6123889B2 (ja) | 2017-05-10 |
JPWO2014196497A1 (ja) | 2017-02-23 |
CN105393067B (zh) | 2018-01-23 |
US20160138835A1 (en) | 2016-05-19 |
EP3006860B1 (en) | 2021-08-04 |
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