CN102410680A - Method for controlling thermal load response of water chilling unit - Google Patents
Method for controlling thermal load response of water chilling unit Download PDFInfo
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- CN102410680A CN102410680A CN2011103344816A CN201110334481A CN102410680A CN 102410680 A CN102410680 A CN 102410680A CN 2011103344816 A CN2011103344816 A CN 2011103344816A CN 201110334481 A CN201110334481 A CN 201110334481A CN 102410680 A CN102410680 A CN 102410680A
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- water chilling
- temperature
- thermic load
- chilling units
- handpiece water
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Abstract
The invention discloses a method for controlling thermal load response of a water chilling unit, which comprises the steps of real-timely monitoring the practical thermal load capacity and practical liquid supply temperature of the water chilling unit, and automatically regulating the water chilling unit based on the set thermal load capacity and the set liquid supply temperature. The method can real-timely monitor the thermal load capacity, and automatically unload or load based on the thermal load capacity to lead the refrigerating capacity of the water chilling unit to be quickly matched with the thermal load. The method can reduce the fluctuation of water supply temperature, and can lower the unit energy consumption to realize energy conservation and consumption reduction under the premise that the water supply temperature of the water chilling unit meets requirements.
Description
Technical field
The present invention relates to handpiece Water Chilling Units dynamic response control field, specifically is a kind of control method of handpiece Water Chilling Units thermic load response.
Background technology
At present, the climate type that China's air-conditioning uses belongs to the T1 class, and such air-conditioning refrigerating operaton in summer limiting temperature of relevant national standard is 43 ℃, and air-conditioning manufacturing enterprise manufactures for foundation by this standard.But because China's weather diversity, the environment actual temperature often was higher than 43 ℃ when the increase in temperature of summer high temperature and continuous days lengthening caused air-conditioning to use, and in use the handpiece Water Chilling Units Chang Buneng of air-conditioning normally moves, loads and unloads.Current, handpiece Water Chilling Units loads, mainly according to feed flow temperature or time liquid temp, there is many deficiencies: the feed flow temperature fluctuation is big for Unloading Control; To the low-response that thermic load changes, unit bad adaptability; Unit COP is low, and energy consumption is high.In addition, the feed flow temperature accuracy is being required than under the condition with higher, only using the feed flow temperature to be used as that handpiece Water Chilling Units loads, the foundation of unloading is just more improper.
Summary of the invention
The technical problem that the present invention will solve provides a kind of control method of handpiece Water Chilling Units thermic load response, solves present handpiece Water Chilling Units and loads and the inaccurate problem of unloading operation.
Technical scheme of the present invention is:
A kind of control method of handpiece Water Chilling Units thermic load response may further comprise the steps:
(1), the design temperature of record handpiece Water Chilling Units and set the thermic load amount when prime;
(2), gather the feed flow temperature of handpiece Water Chilling Units, calculate the actual heating load amount;
(3), the contrast size of decide feed flow temperature and design temperature, actual heating load amount and the size of setting the thermic load amount, confirm the handpiece Water Chilling Units loading, unload or three kinds of operations of maintenance current state:
A, when the feed flow temperature greater than design temperature, and the actual heating load amount is then carried out load operation to unit when setting the thermic load amount when prime;
B, when the feed flow temperature greater than design temperature, and the actual heating load amount is less than or equal to when prime is set the thermic load amount, then keeps current state constant;
C, be less than or equal to design temperature when the feed flow temperature, and actual heating load keeps then current state constant greater than when prime is set the thermic load amount;
D, be less than or equal to design temperature when the feed flow temperature, and actual heating load is less than or equal to when prime and sets the thermic load amount, then unit is carried out unloading operation;
(4), after accomplishing aforesaid operations, treat system stability after time-delay a period of time after, collecting temperature and flow signal again, when reach set delay time after, carry out control operation again.
Described setting thermic load amount at different levels is to carry out analytical calculation respectively through the loading progression to handpiece Water Chilling Units, obtains every grade and loads the corresponding respectively thermic load amount of progression, and it is decided to be setting thermic load amount at different levels.
Described actual heating load amount is to calculate according to the thermodynamics formula, and the thermodynamics formula is following:
Q=C×F×（T
2-T
1）
Wherein: Q-unit thermic load amount (kW)
The specific heat of C-circulation fluid (kJ/ (kgK))
F-circulating fluid flow rate (kg/s)
T
1-feed flow temperature (℃)
T
2-time liquid temp (℃).
Described feed flow temperature reaches back liquid temp and is average feed flow temperature and the average liquid temp that returns through being arranged at the temperature sensor on the feed flow pipeline and being arranged at the temperature sensor collection on the back liquid pipeline and behind software filtering, obtaining by mean value calculation.
Described circulating fluid flow rate is the average circulating fluid flow rate through being arranged at the circulating fluid flow rate sensor acquisition on the liquid back pipe road and behind software filtering, obtaining by mean value calculation.
Describedly be arranged at the measured temperature of temperature sensor on the feed flow pipeline, the measured temperature of temperature sensor that is arranged on the liquid back pipe road is all gathered, is handled and store through intelligent controller.
The measured data on flows of circulating fluid quantity sensor on the described liquid back pipe road is gathered, is handled and store through intelligent controller.
Described software filtering is meant that the method for utilizing software processes removes the interfering data in the image data, and obtain want calculated data; Described mean value calculation is selected weighted-average method for use, progressively strengthens the weight of this moment data point in whole data group constantly in proper order by gathering.
Setting delay time of the present invention will fully take into account the time interval of compressor loads in the handpiece Water Chilling Units, unloading; Be difficult for too short or long; Time is too short then possibly to have a negative impact to the handpiece Water Chilling Units life-span, and overlong time then possibly not reach the thermic load effect of response fast.
The present invention can monitor the variation of thermic load in real time; And change the refrigerating capacity of adjusting handpiece Water Chilling Units through the mode of automatic unloading or loading according to thermic load; Itself and thermic load are mated fast, and this method can reduce the fluctuation of supply water temperature, and can make handpiece Water Chilling Units under the situation that supply water temperature meets the demands; Reduce the unit energy consumption, reach energy saving purposes.
Description of drawings
Fig. 1 is an operational flowchart of the present invention, and wherein, " Y " representative is eligible, and " N " representative is ineligible.
The specific embodiment
See Fig. 1, a kind of control method of handpiece Water Chilling Units thermic load response may further comprise the steps:
(1), the design temperature of record handpiece Water Chilling Units and set the thermic load amount when prime;
(2), gather the feed flow temperature of handpiece Water Chilling Units, and calculate the actual heating load amount;
(3), the contrast size of decide feed flow temperature and design temperature, actual heating load amount and the size of setting the thermic load amount, confirm the handpiece Water Chilling Units loading, unload or three kinds of operations of maintenance current state:
A, when the feed flow temperature greater than design temperature, and the actual heating load amount is then carried out load operation to unit when setting the thermic load amount when prime;
B, when the feed flow temperature greater than design temperature, and the actual heating load amount is less than or equal to when prime is set the thermic load amount, then keeps current state constant;
C, be less than or equal to design temperature when the feed flow temperature, and actual heating load keeps then current state constant greater than when prime is set the thermic load amount;
D, be less than or equal to design temperature when the feed flow temperature, and actual heating load is less than or equal to when prime and sets the thermic load amount, then unit is carried out unloading operation;
(4), after accomplishing aforesaid operations, treat system stability after time-delay a period of time after, collecting temperature and flow signal again, when reach set delay time after, return and carry out new control operation.
Wherein, setting thermic load amounts at different levels are to carry out analytical calculation respectively through the progression that respectively loads to handpiece Water Chilling Units, obtain every grade and load the corresponding respectively thermic load amount of progression, and it is decided to be setting thermic load at different levels;
The feed flow temperature reaches back liquid temp and is average feed flow temperature and the average liquid temp that returns through being arranged at the temperature sensor on the feed flow pipeline and being arranged at the temperature sensor collection on the back liquid pipeline and behind software filtering, obtaining by mean value calculation;
Circulating fluid flow rate is the average circulating fluid flow rate through being arranged at the circulating fluid flow rate sensor acquisition on the liquid back pipe road and behind software filtering, obtaining by mean value calculation;
Actual heating load amount through type: Q=C * F * (T
2-T
1) calculate.Wherein, C is the specific heat of cycling hot, and F is the handpiece Water Chilling Units circulating fluid flow rate, T
2For handpiece Water Chilling Units is on average returned liquid temp, T
1Be the average feed flow temperature of handpiece Water Chilling Units.
Software filtering is to utilize the method for software processes to remove the interfering data in the image data, and obtain want calculated data; Described mean value calculation is selected weighted-average method for use, progressively strengthens the weight of this moment data point in whole data group constantly in proper order by gathering.
Claims (8)
1. the control method of handpiece Water Chilling Units thermic load response is characterized in that: may further comprise the steps:
(1), the design temperature of record handpiece Water Chilling Units and set the thermic load amount when prime;
(2), gather the feed flow temperature of handpiece Water Chilling Units, calculate the actual heating load amount;
(3), the contrast size of decide feed flow temperature and design temperature, actual heating load amount and the size of setting the thermic load amount, confirm the handpiece Water Chilling Units loading, unload or three kinds of operations of maintenance current state:
A, when the feed flow temperature greater than design temperature, and the actual heating load amount is then carried out load operation to unit when setting the thermic load amount when prime;
B, when the feed flow temperature greater than design temperature, and the actual heating load amount is less than or equal to when prime is set the thermic load amount, then keeps current state constant;
C, be less than or equal to design temperature when the feed flow temperature, and actual heating load keeps then current state constant greater than when prime is set the thermic load amount;
D, be less than or equal to design temperature when the feed flow temperature, and actual heating load is less than or equal to when prime and sets the thermic load amount, then unit is carried out unloading operation;
(4), after accomplishing aforesaid operations, treat system stability after time-delay a period of time after, collecting temperature and flow signal again, when reach set delay time after, carry out control operation again.
2. the control method of a kind of handpiece Water Chilling Units thermic load response according to claim 1; It is characterized in that: described setting thermic load amounts at different levels are to carry out analytical calculation respectively through the loading progression to handpiece Water Chilling Units; Obtain every grade and load the corresponding respectively thermic load amount of progression, and it is decided to be setting thermic load amount at different levels.
3. the control method of a kind of handpiece Water Chilling Units thermic load response according to claim 1, it is characterized in that: described actual heating load amount is to calculate according to the thermodynamics formula, and the thermodynamics formula is following:
Q=C×F×（T
2-T
1）
Wherein: Q-unit thermic load amount (kW)
The specific heat of C-circulation fluid (kJ/ (kgK))
F-circulating fluid flow rate (kg/s)
T
1-feed flow temperature (℃)
T
2-time liquid temp (℃).
4. the control method of a kind of handpiece Water Chilling Units thermic load response according to claim 3 is characterized in that: described feed flow temperature reaches back liquid temp and is average feed flow temperature and the average liquid temp that returns through being arranged at the temperature sensor on the feed flow pipeline and being arranged at the temperature sensor collection on the back liquid pipeline and behind software filtering, obtaining by mean value calculation.
5. the control method of a kind of handpiece Water Chilling Units thermic load response according to claim 3, it is characterized in that: described circulating fluid flow rate is the average circulating fluid flow rate through being arranged at the circulating fluid flow rate sensor acquisition on the liquid back pipe road and behind software filtering, obtaining by mean value calculation.
6. the control method of a kind of handpiece Water Chilling Units thermic load response according to claim 4 is characterized in that: describedly be arranged at the measured temperature of temperature sensor on the feed flow pipeline, the measured temperature of temperature sensor that is arranged on the liquid back pipe road is all gathered, handled and store through intelligent controller.
7. the control method of a kind of handpiece Water Chilling Units thermic load response according to claim 5, it is characterized in that: the measured data on flows of the circulating fluid quantity sensor on the described liquid back pipe road is gathered, is handled and store through intelligent controller.
8. according to the control method of claim 4 or 5 described a kind of handpiece Water Chilling Units thermic loads responses, it is characterized in that: described software filtering is meant that the method for utilizing software processes removes the interfering data in the image data, and obtain want calculated data; Described mean value calculation is selected weighted-average method for use, progressively strengthens the weight of this moment data point in whole data group constantly in proper order by gathering.
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|---|---|---|---|
| CN 201110334481 CN102410680B (en) | 2011-10-30 | 2011-10-30 | Method for controlling thermal load response of water chilling unit |
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|---|---|---|---|
| CN 201110334481 CN102410680B (en) | 2011-10-30 | 2011-10-30 | Method for controlling thermal load response of water chilling unit |
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| CN102410680B CN102410680B (en) | 2013-06-19 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456836A (en) * | 2014-11-04 | 2015-03-25 | 江苏省电力公司 | Method for controlling orderly power utilization of central air conditioner based on load relation |
| CN104748319A (en) * | 2015-04-22 | 2015-07-01 | 珠海格力电器股份有限公司 | Multi-set air-conditioning system control method and device and multi-set air-conditioning system |
| CN105003954A (en) * | 2015-07-17 | 2015-10-28 | 张久明 | Heating adjusting system and heating adjusting device and method for building |
| CN105042780A (en) * | 2015-07-23 | 2015-11-11 | 魏强 | Central-air-conditioner control system |
| CN106247441A (en) * | 2016-08-08 | 2016-12-21 | 山东华旗新能源科技有限公司 | Heat pump energy-conserving control system and method |
| CN110492530A (en) * | 2019-07-26 | 2019-11-22 | 广西电网有限责任公司南宁供电局 | A kind of water cooler participates in the duty control method and device of power grid frequency modulation |
| CN110953628A (en) * | 2019-12-20 | 2020-04-03 | 珠海格力电器股份有限公司 | Multistage series heat pump system and control method thereof |
| CN111174272A (en) * | 2020-01-06 | 2020-05-19 | 珠海格力电器股份有限公司 | Heat pump heating system and control method thereof |
| CN112098130A (en) * | 2020-09-15 | 2020-12-18 | 武汉汉立制冷科技股份有限公司 | Dynamic thermal load simulation device for testing optical fiber laser water chiller |
| CN113405307A (en) * | 2020-03-16 | 2021-09-17 | 大族激光科技产业集团股份有限公司 | Circulating liquid separation control method and device |
| CN115289732A (en) * | 2022-07-04 | 2022-11-04 | 广东纽恩泰新能源科技发展有限公司 | Heat pump system control method and device, electronic equipment and storage medium |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456836A (en) * | 2014-11-04 | 2015-03-25 | 江苏省电力公司 | Method for controlling orderly power utilization of central air conditioner based on load relation |
| CN104456836B (en) * | 2014-11-04 | 2017-04-12 | 江苏省电力公司 | Method for controlling orderly power utilization of central air conditioner based on load relation |
| CN104748319B (en) * | 2015-04-22 | 2018-07-03 | 珠海格力电器股份有限公司 | Multicomputer air conditioner system control method, device and multicomputer air-conditioning system |
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| CN105003954A (en) * | 2015-07-17 | 2015-10-28 | 张久明 | Heating adjusting system and heating adjusting device and method for building |
| CN105003954B (en) * | 2015-07-17 | 2017-10-10 | 张久明 | Heat supply adjustment system, heat supply adjusting apparatus and the method for building |
| CN105042780A (en) * | 2015-07-23 | 2015-11-11 | 魏强 | Central-air-conditioner control system |
| CN106247441B (en) * | 2016-08-08 | 2019-05-21 | 山东华旗新能源科技有限公司 | Heat pump energy-conserving control system and method |
| CN106247441A (en) * | 2016-08-08 | 2016-12-21 | 山东华旗新能源科技有限公司 | Heat pump energy-conserving control system and method |
| CN110492530A (en) * | 2019-07-26 | 2019-11-22 | 广西电网有限责任公司南宁供电局 | A kind of water cooler participates in the duty control method and device of power grid frequency modulation |
| CN110953628A (en) * | 2019-12-20 | 2020-04-03 | 珠海格力电器股份有限公司 | Multistage series heat pump system and control method thereof |
| CN111174272A (en) * | 2020-01-06 | 2020-05-19 | 珠海格力电器股份有限公司 | Heat pump heating system and control method thereof |
| CN113405307A (en) * | 2020-03-16 | 2021-09-17 | 大族激光科技产业集团股份有限公司 | Circulating liquid separation control method and device |
| CN113405307B (en) * | 2020-03-16 | 2023-03-28 | 大族激光科技产业集团股份有限公司 | Circulating liquid separation control method and device |
| CN112098130A (en) * | 2020-09-15 | 2020-12-18 | 武汉汉立制冷科技股份有限公司 | Dynamic thermal load simulation device for testing optical fiber laser water chiller |
| CN115289732A (en) * | 2022-07-04 | 2022-11-04 | 广东纽恩泰新能源科技发展有限公司 | Heat pump system control method and device, electronic equipment and storage medium |
| CN115289732B (en) * | 2022-07-04 | 2023-11-21 | 广东纽恩泰新能源科技发展有限公司 | Heat pump system control method and device, electronic equipment and storage medium |
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