CN108050665A - A kind of cold control method for building body - Google Patents
A kind of cold control method for building body Download PDFInfo
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- CN108050665A CN108050665A CN201711384695.8A CN201711384695A CN108050665A CN 108050665 A CN108050665 A CN 108050665A CN 201711384695 A CN201711384695 A CN 201711384695A CN 108050665 A CN108050665 A CN 108050665A
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- cold
- temperature
- control method
- building body
- time constant
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Abstract
The invention discloses a kind of cold control method for building body, this method comprises the following steps：S1 according to water velocity and the length of pipe network in cold and hot matchmaker's transport pipe network, determines the regulating time constant of cooling system；After a regulating time constant, the cold of cooling system output is determined according to chilled water return water temperature and the difference for setting return water temperature by S2；S3 repeats step S2 until cold output stabilization, obtains corresponding load under the outdoor temperature.The present invention can make refrigeration system that can stablize in the shorter time, and the overshoot of system is small, and the concussion time is short, and in energy-saving run state.
Description
Technical field
The present invention relates to spatial load forecasting field, more particularly to a kind of cold control methods for building body.
Background technology
Supply cold is the core technology of central air-conditioning Optimal Control System on demand.Correct load prediction is rationally to transport
Seek the premise of refrigerator room.Each refrigeration machine has certain refrigeration work consumption, and has respective load efficiency curve, water pump
Similar it can consider, with the variation of pump variable frequency device frequency, the flow and lift of water pump also change therewith.
Correctly prediction load is to determine loading host, the foundation of water pump number of units, and can occur big shake to avoid temperature
It swings and energy waste.
However building system load is time-varying parameter, climate, the factors such as personnel and building service condition influence, and obtain
It is nearly impossible to accurate cooling and heating load numerical value.
An overshoot process is had as shown in Figure 1, being conditioned between value and set-point, overshoot is bigger, and system concussion is more
Severity is big to system shock power.
The content of the invention
The object of the present invention is to provide a kind of cold control method for building body, make refrigeration system when shorter
Between can stablize, the overshoot of system is small, and the concussion time is short, and in energy-saving run state.
In order to achieve the goal above, the present invention is achieved by the following technical solutions：
A kind of cold control method for building body, its main feature is that, this method comprises the following steps：
S1 according to water velocity and the length of pipe network in cold and hot matchmaker's transport pipe network, determines the regulating time constant of cooling system；
S2 after a regulating time constant, determines that cooling system is defeated according to chilled water return water temperature and the difference for setting return water temperature
The cold gone out；
S3 repeats step S2 until cold output stabilization, obtains corresponding load under the outdoor temperature.
The regulating time constant is less than outside air temperature time constant.
The cold output stabilizes to chilled water return water temperature, and fluctuation range is less than 5% up and down.
It is also included after the step S3：
Corresponding load outside the annual different chamber of record at temperature.
Compared with prior art, the present invention it has the following advantages：
System loading is determined in this way, and the system of avoiding is chronically at the state for adjusting concussion, can make system shorter
Time can stablize, the overshoot of the decorum is small, and the concussion time is short, and in energy-saving run state.
Description of the drawings
Fig. 1 is the schematic diagram of overshoot；
Fig. 2 is the control principle drawing of design temperature and chilled-water flow；
Fig. 3 is a kind of flow chart of cold control method for building body of the invention.
Specific embodiment
Below in conjunction with attached drawing, by the way that a preferable specific embodiment is described in detail, the present invention is further elaborated.
In the use of the present invention, first assuming that architecture noumenon will not become, the thermal conductivity factor of exterior wall is constant.
Wind direction can become, but generally winter, the cardinal wind of summer are roughly the same.
The service condition of building is generally constant, and the purposes such as office building, hotel, market determine, pass in and out the meetings such as the personnel of building
Change at any time.
Generally by one-year age, system can travel through all weather condition operations.Temperature from low to high, humidity from it is low to
Height, each wind direction, various solar irradiances etc., except extreme weather.
As shown in figure 3, a kind of cold control method for building body, which is characterized in that this method includes following step
Suddenly：
S1 according to water velocity and the length of pipe network in cold and hot matchmaker's transport pipe network, determines the regulating time constant of cooling system；
S2 after a regulating time constant, determines that cooling system is defeated according to chilled water return water temperature and the difference for setting return water temperature
The cold gone out；
S3 repeats step S2 until cold output stabilization, obtains corresponding load under the outdoor temperature.
The regulating time constant is less than outside air temperature time constant.
The cold output stabilizes to chilled water return water temperature, and fluctuation range is less than 5% up and down.
It is also included after the step S3：
S4 records the corresponding load at temperature outside annual different chamber.
Specifically, Fig. 2 is the control principle drawing of design temperature and chilled-water flow, wherein
Q：Chilled-water flow
T：Indoor design temperature
Using architecture indoor temperature as controlled device, outdoor temperature T1, interior temperature chamber are recorded in control system data acquisition unit
T2, system thing time Time.
Definition structure variables L oadTag { T1, T2, Time, Q }, wherein Q can be a kind of load representations, including cold
Board number and loading condition and the water pump number of units of cooperation and frequency situation.
Since system is there are large time delay characteristic, adopted in order to avoid the larger hyperharmonic concussion time occurs in system using setting
The mode of the adjusting in sample cycle is controlled.
Water velocity is generally in 1m/s in cold and hot matchmaker's transport pipe network, according to the length of official website, it is known that chilled water operates
One week required time Time1, it is Time1 to set the system cycle that adjusting acts every time.
Illustrate adjusting method, it is known that chilled water reaches end and cycles the time of one week as 20 minutes, then when adjusting
Between constant be 20 minutes, and outdoor temperature transformation period need 1 it is small when, 2 it is small when differ, then 1 it is small when, 2 it is small when be outdoor
Air themperature time constant.With 20 minutes to adjust frequency, when this numerical value is small less than 1, the mode taken in this programme is " to adjust
One adjust wait a moment " mode be adjusted, that is, act once after i.e. stopping action, after waiting 20 minutes, chilled water return water is true
It can just reflect chilled water quantity delivered determines to increase or decrease cold supply again after how many, according to return water temperature and setting return water temperature
The difference of degree determines the cold of output next time.So change by one to can accurately track building cooling load twice.And freeze
System and cold transport official website there is no in frequent movement, and adjusting is slow, small to the impact of system.
It can record the load condition at temperature outside annual different chamber in this way, it, can when system operation to second year
According to this correspondence system is made to be exported according to this load operation.Rather than experience, the system operation overshoot time can be greatly reduced,
Reduction system is shaken.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (4)
1. a kind of cold control method for building body, which is characterized in that this method comprises the following steps：
S1 according to water velocity and the length of pipe network in cold and hot matchmaker's transport pipe network, determines the regulating time constant of cooling system；
S2 after a regulating time constant, determines that cooling system is defeated according to chilled water return water temperature and the difference for setting return water temperature
The cold gone out；
S3 repeats step S2 until cold output stabilization, obtains corresponding load under the outdoor temperature.
2. the cold control method of building body to be used for as described in claim 1, which is characterized in that the regulating time is normal
Number is less than outside air temperature time constant.
3. the cold control method of building body to be used for as described in claim 1, which is characterized in that the cold output is steady
Being set to chilled water return water temperature, fluctuation range is less than 5% up and down.
4. the cold control method of building body to be used for as described in claim 1, which is characterized in that after the step S3 also
Comprising：
Corresponding load outside the annual different chamber of record at temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384695.8A CN108050665A (en) | 2017-12-20 | 2017-12-20 | A kind of cold control method for building body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384695.8A CN108050665A (en) | 2017-12-20 | 2017-12-20 | A kind of cold control method for building body |
Publications (1)
| Publication Number | Publication Date |
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| CN108050665A true CN108050665A (en) | 2018-05-18 |
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| CN201711384695.8A Pending CN108050665A (en) | 2017-12-20 | 2017-12-20 | A kind of cold control method for building body |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737899A (en) * | 2009-12-14 | 2010-06-16 | 浙江大学 | Wireless sensor network-based central air-conditioning control system and method |
| CN103486693A (en) * | 2013-09-25 | 2014-01-01 | 广州大学 | Energy-saving control method for central air-conditioning chilled water system |
| US20160320110A1 (en) * | 2015-04-30 | 2016-11-03 | Daikin Industries, Ltd. | Air conditioner |
| CN107192097A (en) * | 2017-06-06 | 2017-09-22 | 珠海格力电器股份有限公司 | Control method and device for air-conditioning chilled water system |
| CN107220514A (en) * | 2017-06-14 | 2017-09-29 | 四川省建筑科学研究院 | Air-conditioning load prediction method and system based on big data |
-
2017
- 2017-12-20 CN CN201711384695.8A patent/CN108050665A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737899A (en) * | 2009-12-14 | 2010-06-16 | 浙江大学 | Wireless sensor network-based central air-conditioning control system and method |
| CN103486693A (en) * | 2013-09-25 | 2014-01-01 | 广州大学 | Energy-saving control method for central air-conditioning chilled water system |
| US20160320110A1 (en) * | 2015-04-30 | 2016-11-03 | Daikin Industries, Ltd. | Air conditioner |
| CN107192097A (en) * | 2017-06-06 | 2017-09-22 | 珠海格力电器股份有限公司 | Control method and device for air-conditioning chilled water system |
| CN107220514A (en) * | 2017-06-14 | 2017-09-29 | 四川省建筑科学研究院 | Air-conditioning load prediction method and system based on big data |
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Application publication date: 20180518 |