CN104676834A - Method for controlling cooling water systems in freezing station systems on basis of environmental temperatures and compression ratios - Google Patents
Method for controlling cooling water systems in freezing station systems on basis of environmental temperatures and compression ratios Download PDFInfo
- Publication number
- CN104676834A CN104676834A CN201510054655.1A CN201510054655A CN104676834A CN 104676834 A CN104676834 A CN 104676834A CN 201510054655 A CN201510054655 A CN 201510054655A CN 104676834 A CN104676834 A CN 104676834A
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- China
- Prior art keywords
- temperature
- cooling water
- pressure ratio
- flow
- water
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- 239000000498 cooling water Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000007613 environmental effect Effects 0.000 title claims abstract description 8
- 238000007710 freezing Methods 0.000 title abstract 6
- 230000008014 freezing Effects 0.000 title abstract 6
- 230000006835 compression Effects 0.000 title abstract 2
- 238000007906 compression Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000005057 refrigeration Methods 0.000 claims description 25
- 239000000725 suspension Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the field of control for integrated freezing stations, in particular to a method for controlling cooling water systems in freezing station systems on the basis of environmental temperatures and compression ratios. The method includes particular steps of monitoring environmental wet-bulb temperatures of the outsides of freezing station units and comparing the environmental wet-bulb temperatures to set temperatures; regulating flow of cooling water until the flow of the cooling water is equal to 0.6 times rated flow if the environmental temperatures are lower than or equal to the set temperatures, regulating the flow of the cooling water until the flow of the cooling water is equal to the rated flow, allowing the flow of the cooling water to continue being equal to the rated flow for 5-8 seconds, monitoring the temperatures of inlet water of condensers, judging whether the temperatures of the inlet water of the condensers are lower than the set temperatures or not, and starting fans of cooling towers; monitoring measured pressure difference between freezing water and cooling water and starting main units; judging the types of compressors, and allowing the cooling water systems to enter quick loading modes until the cooling water systems stop running. The method has the advantages that the cooling water systems can be logically controlled by the aid of logic control of the all-variable-frequency freezing station systems, accordingly, obvious energy-saving effects can be realized, and the method is high in automation degree and suitable to be popularized and utilized in the industry.
Description
Technical field
What the present invention relates to is integrated refrigeration station control field, is specifically related to the method based on ring temperature and pressure ratio controlled cooling model water system in a kind of refrigeration station system.
Background technology
Buildings in general causes air conditioner load to change along with seasonal variations, and winter, thermic load was generally little than refrigeration duty in summer, and air-conditioner water system supply backwater temperature difference generally gets 5 DEG C summer, gets 10 DEG C winter.Need refrigerating operaton at transition season or winter, now cooling water temperature is on the low side, if do not carry out control can produce lower pressure ratio, thus causes cold in refrigeration station system normally to start.
In the prior art, the mode of compressor raising pressure ratio adopts bypass mode to control the flow of water-cooling system usually; Or directly employing manually or empirical data carries out controlled cooling model tower and quantity opened by cooling water pump, and subjectivity accounting is comparatively large, cannot realize Automated condtrol.And this kind to control lower control accuracy poor, water system hysteresis quality greatly, causes cold difficulty in starting, even cannot normally run.
Summary of the invention
According to the deficiencies in the prior art, the invention provides a kind of by judging the mode that combines of compressor pressure ratio in environment temperature and control refrigerator system, the method for controlled cooling model water system, thus realize refrigeration station system and run fast.
Technical scheme of the present invention is: based on the method for ring temperature and pressure ratio controlled cooling model water system in a kind of refrigeration station system, concrete steps are as follows:
1) ambient wet bulb temperature outside monitoring refrigeration station unit compares with design temperature, when environment temperature is greater than design temperature, carry out step 2); When environment temperature is less than or equal to design temperature, the flow of cooling water is adjusted to the metered flow of 0.6 times, proceeds step 3);
2) the comparing of monitoring of environmental wet-bulb temperature and design temperature, when environment temperature is more than or equal to design temperature, the flow of cooling water is adjusted to metered flow, continues 5-8 second, proceed step 4); When environment temperature is less than design temperature, the flow of cooling water is adjusted to (0.6-1.0) metered flow doubly, continues 5-8 second, proceed step 3);
3) whether the temperature of monitoring condenser water inlet is less than design temperature, when the temperature of condenser water inlet is less than design temperature, opens cooling tower one-level fan; When the temperature of condenser water inlet is more than or equal to design temperature, open cooling tower secondary fan;
4) monitoring chilled water and cooling water actual measurement pressure reduction continue to be greater than 45%-50% normal flow pressure reduction more than 15 seconds, then start main frame;
5) type of compressor is judged, when type of compressor is magnetic suspension centrifugal compressor, judge the operation pressure ratio of compressor and the size setting pressure ratio, when running pressure ratio and being greater than setting pressure ratio, after cooling tower leaving water temperature desired value being set to 26 DEG C by centralized control system, re-start step 1); When running pressure ratio and being not more than setting pressure ratio, then handpiece Water Chilling Units in refrigeration station system is loaded amplitude and adjust to 10% to end of run; When type of compressor is not for magnetic suspension centrifugal compressor, the operation pressure reduction of monitoring handpiece Water Chilling Units, when running pressure reduction and being greater than setting pressure reduction, after cooling tower leaving water temperature desired value being set to 26 DEG C by centralized control system, re-starts step 1); When running pressure ratio and being not more than setting pressure reduction, then handpiece Water Chilling Units in refrigeration station system is loaded amplitude and adjust to 10% to end of run.
Preferred version is as follows:
Step 1) in design temperature be 22 DEG C.
Step 2) in design temperature be 28 DEG C.
Step 3) in design temperature be 25 DEG C.
Step 5) in setting pressure ratio be 1.4.
Step 5) in setting pressure reduction be 0.3MPa.
The present invention by the logic control of full frequency conversion refrigeration station system, thus realizes the logic control of cooling water system, and energy-saving effect is fairly obvious, and automaticity is high, is suitable for commercial introduction and uses.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Detailed description of the invention
Below in conjunction with Fig. 1, the present embodiment is described in further detail, but the present invention is not limited to specific embodiment.
Embodiment 1:
Based on a method for ring temperature and pressure ratio controlled cooling model water system in refrigeration station system, concrete steps are as follows:
1) monitor ambient wet bulb temperature outside refrigeration station unit and 22 DEG C compare, when environment temperature is greater than 22 DEG C, carry out step 2); When environment temperature is less than or equal to 22 DEG C, the flow of cooling water is adjusted to the metered flow of 0.6 times, proceeds step 3);
2) monitoring of environmental wet-bulb temperature and 28 DEG C compare, when environment temperature is more than or equal to 28 DEG C, the flow of cooling water is adjusted to metered flow, continues 5 seconds, proceed step 4); When environment temperature is less than 28 DEG C, the flow of cooling water is adjusted to (0.6-1.0) metered flow doubly, continues 5 seconds, proceed step 3);
3) whether the temperature of monitoring condenser water inlet is less than 25 DEG C, when the temperature of condenser water inlet is less than 25 DEG C, opens cooling tower one-level fan; When the temperature of condenser water inlet is more than or equal to 25 DEG C, open cooling tower secondary fan;
4) monitoring chilled water and cooling water actual measurement pressure reduction continue to be greater than 45% normal flow pressure reduction more than 15 seconds, then start main frame;
5) type of compressor is judged, when type of compressor is magnetic suspension centrifugal compressor, judge the operation pressure ratio of compressor and the size of 1.4, when running pressure ratio and being greater than 1.4, after cooling tower leaving water temperature desired value being set to 26 DEG C by centralized control system, re-start step 1); When running pressure ratio and being not more than 1.4, then handpiece Water Chilling Units in refrigeration station system is loaded amplitude and adjust to 10% to end of run; When type of compressor is not for magnetic suspension centrifugal compressor, the operation pressure reduction of monitoring handpiece Water Chilling Units, when running pressure reduction and being greater than 0.3MPa, after cooling tower leaving water temperature desired value being set to 26 DEG C by centralized control system, re-starts step 1); When running pressure ratio and being not more than 0.3MPa, then handpiece Water Chilling Units in refrigeration station system is loaded amplitude and adjust to 10% to end of run.
The present invention by the logic control of full frequency conversion refrigeration station system, thus realizes the logic control of cooling water system, and energy-saving effect is fairly obvious, and automaticity is high, is suitable for commercial introduction and uses.
Claims (6)
1. in refrigeration station system based on a method for ring temperature and pressure ratio controlled cooling model water system, it is characterized in that concrete steps are as follows:
1) ambient wet bulb temperature outside monitoring refrigeration station unit compares with design temperature, when environment temperature is greater than design temperature, carry out step 2); When environment temperature is less than or equal to design temperature, the flow of cooling water is adjusted to the metered flow of 0.6 times, proceeds step 3);
2) the comparing of monitoring of environmental wet-bulb temperature and design temperature, when environment temperature is more than or equal to design temperature, the flow of cooling water is adjusted to metered flow, continues 5-8 second, proceed step 4); When environment temperature is less than design temperature, the flow of cooling water is adjusted to (0.6-1.0) metered flow doubly, continues 5-8 second, proceed step 3);
3) whether the temperature of monitoring condenser water inlet is less than design temperature, when the temperature of condenser water inlet is less than design temperature, opens cooling tower one-level fan; When the temperature of condenser water inlet is more than or equal to design temperature, open cooling tower secondary fan;
4) monitoring chilled water and cooling water actual measurement pressure reduction continue to be greater than 45%-50% normal flow pressure reduction more than 15 seconds, then start main frame;
5) type of compressor is judged, when type of compressor is magnetic suspension centrifugal compressor, judge the operation pressure ratio of compressor and the size setting pressure ratio, when running pressure ratio and being greater than setting pressure ratio, after cooling tower leaving water temperature desired value being set to 26 DEG C by centralized control system, re-start step 1); When running pressure ratio and being not more than setting pressure ratio, then handpiece Water Chilling Units in refrigeration station system is loaded amplitude and adjust to 10% to end of run; When type of compressor is not for magnetic suspension centrifugal compressor, the operation pressure reduction of monitoring handpiece Water Chilling Units, when running pressure reduction and being greater than setting pressure reduction, after cooling tower leaving water temperature desired value being set to 26 DEG C by centralized control system, re-starts step 1); When running pressure ratio and being not more than setting pressure reduction, then handpiece Water Chilling Units in refrigeration station system is loaded amplitude and adjust to 10% to end of run.
2. in a kind of refrigeration station according to claim 1 system based on the method for ring temperature and pressure ratio controlled cooling model water system, it is characterized in that: step 1) in design temperature be 22 DEG C.
3. in a kind of refrigeration station according to claim 1 system based on the method for ring temperature and pressure ratio controlled cooling model water system, it is characterized in that: step 2) in design temperature be 28 DEG C.
4. in a kind of refrigeration station according to claim 1 system based on the method for ring temperature and pressure ratio controlled cooling model water system, it is characterized in that: step 3) in design temperature be 25 DEG C.
5. in a kind of refrigeration station according to claim 1 system based on the method for ring temperature and pressure ratio controlled cooling model water system, it is characterized in that: step 5) in setting pressure ratio be 1.4.
6. in a kind of refrigeration station according to claim 1 system based on the method for ring temperature and pressure ratio controlled cooling model water system, it is characterized in that: step 5) in setting pressure reduction be 0.3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054655.1A CN104676834B (en) | 2015-02-02 | 2015-02-02 | The method for controlling cooling water system in refrigeration station system with pressure ratio based on ring temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054655.1A CN104676834B (en) | 2015-02-02 | 2015-02-02 | The method for controlling cooling water system in refrigeration station system with pressure ratio based on ring temperature |
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| Publication Number | Publication Date |
|---|---|
| CN104676834A true CN104676834A (en) | 2015-06-03 |
| CN104676834B CN104676834B (en) | 2017-06-23 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2149907A (en) * | 1981-09-14 | 1985-06-19 | Mcfarlan Alden I | Air conditioning system and method |
| JPH07198182A (en) * | 1993-12-28 | 1995-08-01 | Taisei Corp | Controlling method for perimeter air conditioner and control system |
| JPH10238842A (en) * | 1997-02-25 | 1998-09-08 | Matsushita Electric Works Ltd | Air-conditioning controller and air-conditioning control method using the device |
| CN1869532A (en) * | 2006-04-25 | 2006-11-29 | 广州市地下铁道总公司 | Automatic control method for central cold supply system |
| CN101363653A (en) * | 2008-08-22 | 2009-02-11 | 日滔贸易（上海）有限公司 | Energy consumption control method and device of central air-conditioning refrigeration system |
| CN203478510U (en) * | 2013-10-10 | 2014-03-12 | 王鸿雁 | Center air conditioner energy-saving PLC |
| CN103868190A (en) * | 2012-12-12 | 2014-06-18 | 同方泰德国际科技(北京)有限公司 | Energy-saving control method suitable for central air-conditioning cooling water system |
-
2015
- 2015-02-02 CN CN201510054655.1A patent/CN104676834B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2149907A (en) * | 1981-09-14 | 1985-06-19 | Mcfarlan Alden I | Air conditioning system and method |
| JPH07198182A (en) * | 1993-12-28 | 1995-08-01 | Taisei Corp | Controlling method for perimeter air conditioner and control system |
| JPH10238842A (en) * | 1997-02-25 | 1998-09-08 | Matsushita Electric Works Ltd | Air-conditioning controller and air-conditioning control method using the device |
| CN1869532A (en) * | 2006-04-25 | 2006-11-29 | 广州市地下铁道总公司 | Automatic control method for central cold supply system |
| CN101363653A (en) * | 2008-08-22 | 2009-02-11 | 日滔贸易（上海）有限公司 | Energy consumption control method and device of central air-conditioning refrigeration system |
| CN103868190A (en) * | 2012-12-12 | 2014-06-18 | 同方泰德国际科技(北京)有限公司 | Energy-saving control method suitable for central air-conditioning cooling water system |
| CN203478510U (en) * | 2013-10-10 | 2014-03-12 | 王鸿雁 | Center air conditioner energy-saving PLC |
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| CN104676834B (en) | 2017-06-23 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190125 Address after: Unit 101, No. 56, No. 4, Zaoyuan Road, Licang District, Qingdao City, Shandong Province Patentee after: Qingdao Zhongzeng Energy Technology Co., Ltd. Address before: 266000 Room 1205, Xiwang Building, 138 Dunhua Road, North District, Qingdao City, Shandong Province Patentee before: Han Bing |
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| TR01 | Transfer of patent right |