CN101498494B - Economical operation method for central air conditioning system - Google Patents
Economical operation method for central air conditioning system Download PDFInfo
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- CN101498494B CN101498494B CN2008100332783A CN200810033278A CN101498494B CN 101498494 B CN101498494 B CN 101498494B CN 2008100332783 A CN2008100332783 A CN 2008100332783A CN 200810033278 A CN200810033278 A CN 200810033278A CN 101498494 B CN101498494 B CN 101498494B
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- cold
- control system
- host computer
- storage groove
- refrigeration host
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000005057 refrigeration Methods 0.000 claims description 51
- 238000001816 cooling Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 abstract 8
- 238000011017 operating method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 235000019628 coolness Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention relates to an economical operating method of a central air-conditioning system, comprising the following steps: cold accumulation operation, i.e. a control system controls the closing of a valve at the inlet end of a fan coil, valves at two ends of a cold accumulation groove are open, refrigerating water comes out of the evaporator of a refrigerating main machine and enters the cold accumulation groove through a valve, the refrigerating water and cold accumulation medium in the groove undergo heat exchange, and the refrigerating water subject to the heat exchange is jointed at the collector pipe of the cold accumulation groove and is conveyed to the evaporator of the refrigerating main machine by a refrigerating water pump for purpose of temperature reduction, thus the cold accumulation circulation is completed; and cold supply operation, i.e. a monitor of a control system is used for monitoring the environment temperature and the air-conditioning load change and calculates which working condition of the compressor of the refrigerating main machine leads to the highest energy efficiency, a frequency converter is used for changing the rotation speed of the centrifugal compressor so that the compressor can work in the optimum working condition, the cold accumulation groove provides cold load for the sake of sufficient cold load, and surplus cold is stored in the cold accumulation groove. The invention causes the refrigerating main machine of the central air-conditioning system to keep operating with the highest efficiency, without being influenced by the change of the outside air temperature or the air-conditioning load, and the invention causes the refrigerating main machine of the central air-conditioning system to save energy to the maximum extent.
Description
Technical field
The present invention relates to the economical operation method of HVAC, relate in particular to a kind of economical operation method of central air-conditioning system.
Background technology
Now, in central air-conditioning system, Energy Efficiency Ratio greatly improved after the centrifugal refrigerating unit adopted converter technique, but the Energy Efficiency Ratio that improves has certain limitation scope, most between the loading zone about 40%～60%, just can reach high energy efficiency ratio, but it is not to run in this interval that the plenty of time is arranged the whole year, and optimum energy-saving effect is restricted.In addition, the control system of central air-conditioning system generally can realize functions such as warning, parameter demonstration, equipment linkage start and stop, but need the monitor staff according to weather condition, electricity price factor and load condition is artificially judged, manually control the conversion of various operating conditions, therefore there is the control inaccuracy, unhandy problem.
See also Fig. 1, this figure is the system block diagram of the central air-conditioning system of prior art, comprise that one contains the refrigeration host computer 1 of condenser 11, evaporimeter 12, compressor and throttling arrangement, this refrigeration host computer 1 is a frequency conversion centrifugal refrigerating machines, it also comprises: a cooling tower 2, one end are series at the two ends of the condenser 11 of refrigeration host computer 1 by a cooling water pump 72; One cold-storage groove 3, one end are connected with the port of export of the evaporimeter 12 of refrigeration host computer 1 by an electric two-way valve 52, and connect successively another electric two-way valve 54, a chilled water pump 71 of the other end afterwards is connected with the entrance point of the evaporimeter 12 of described refrigeration host computer 1; One fan coil 4, one end are connected with evaporimeter 12 ports of export by another electric two-way valve 51, the other end electric T-shaped valve 53 of connecting, and other two ends of this valve are connected with cold-storage groove 3 imports, chilled water pump 71 imports respectively; One control system 6 is connected with thermometric contact and all valves 51,52,53,54 of an end of the two ends of the two ends of fan coil 4, evaporimeter 12, condenser 11 respectively, realizes the switch of valve, conversion operation operating mode according to built-in algorithms and program.
Summary of the invention
In order to overcome above-mentioned problem, the present invention aims to provide a kind of economical operation method that is used for central air-conditioning system, to improve the operational efficiency of frequency conversion centrifugal refrigerating main frame, makes it all the time with the peak efficiency operation, promptly guarantees the maximization of main frame Energy Efficiency Ratio.
Technical scheme of the present invention is: a kind of economical operation method of central air-conditioning system, be used for the in service of central air-conditioning system, and may further comprise the steps:
The cold-storage operation, be that night is during cold-storage, control system control fan coil entrance point valve closing, cold-storage groove two ends valve open, chilled water is come out to enter cold-storage groove through valve by the refrigeration host computer evaporimeter, and with groove in cool storage medium carry out heat exchange, the chilled water after the heat exchange confluxes at cold-storage groove collector pipe place and is transported to the refrigeration host computer evaporimeter through chilled water pump and lowers the temperature, finish cold-storage circulation, and by control system control refrigeration host computer all the time with high energy efficiency than operation;
The cooling operation, be that daytime is during cooling, watch-dog monitoring of environmental temperature and air conditioner load by control system change, and the compressor Energy Efficiency Ratio under which kind of operating mode that calculates refrigeration host computer is the highest, the rotating speed that changes centrifugal compressor by frequency converter makes it to move under optimum condition, not enough refrigeration duty is provided by cold-storage groove, and cold more than needed is stored in the cold-storage groove.
In the economical operation method of above-mentioned central air-conditioning system, described cooling is in service, also comprises the comparison process step, is about to that the detected refrigeration host computer of control system move the refrigerating capacity exported under maximum Energy Efficiency Ratio and user's air conditioner load compares, operate accordingly then, that is:
If control system monitors refrigeration host computer when move the refrigerating capacity of exporting equaling user's air-conditioning refrigeration duty under maximum Energy Efficiency Ratio, then by refrigeration host computer directly to the fan coil cooling;
If control system monitors refrigeration host computer and move the requirement of the refrigerating capacity of output less than user's air conditioner load under maximum Energy Efficiency Ratio, then control system controls to adjust electric T-shaped valve, open the path of fan coil and cold-storage groove, the backwater that is come out by fan coil is introduced into the cold-storage groove cooling, send into evaporimeter through cooling water pump again and further lower the temperature, be transported to user side again;
If control system monitors refrigeration host computer and move the air-conditioning refrigeration duty of the refrigerating capacity of output greater than the user under maximum Energy Efficiency Ratio, then control system controls to adjust electric T-shaped valve, close the path of fan coil and cold-storage groove, cold-storage groove two ends valve opening is stored unnecessary cold.
In the economical operation method of above-mentioned central air-conditioning system, if monitoring the cold of cold-storage groove, control system satisfies the residue load, then control system control refrigeration host computer is out of service, provides cold to fan coil separately by cold-storage groove.
In the economical operation method of above-mentioned central air-conditioning system, described control system realizes the switch of valve, the conversion of operating condition according to built-in algorithms and program.
In the economical operation method of above-mentioned central air-conditioning system, cold-storage is in service, and refrigeration host computer list cold-storage operating mode was moved automatically by the time of setting, and out of service automatically in the low ebb electricity price period according to the second day required cold that predicts.
Owing to adopted above-mentioned technical solution, the present invention changes according to air conditioner load and adjusts refrigeration host computer move the cold exported and the coupling of releasing cold or cold storage capacity of cool storage medium under peak efficiency, promptly, when main frame high energy efficiency than under the cold of operation output during less than the air-conditioning refrigeration duty, not enough cold is discharged by cool storage medium; Otherwise unnecessary cold is stored in the cool storage medium, discharges during in order to deficiency, thereby the refrigeration host computer of central air-conditioning is moved with the highest efficient all the time, and the variation with outside air temperature, air conditioner load does not change, the maximization of energy-saving effect trend.In addition, utilize the peak and valley time electricity price to save considerable operating cost for the user.
Description of drawings
Fig. 1 is the system block diagram of the cold-storage central air-conditioning system of prior art.
The specific embodiment
Fig. 1 below in conjunction with prior art describes in detail the present invention.
The present invention is the economical operation method based on a kind of central air-conditioning system of prior art, is used for the in service of central air-conditioning system, may further comprise the steps:
The cold-storage operation, be that night is during cold-storage, control system 6 control fan coil entrance point valves 51 are closed, cold-storage groove 3 two ends valves 52,54 are opened, chilled water is come out to enter cold-storage groove 3 through valve 52 by refrigeration host computer 1 evaporimeter 12, and with groove in cool storage medium carry out heat exchange, chilled water after the heat exchange confluxes at cold-storage groove 3 collector pipe places and is transported to refrigeration host computer 1 evaporimeter 12 through chilled water pump 71 and lowers the temperature, finish cold-storage circulation, and by control system 6 control refrigeration host computers 1 all the time with high energy efficiency than operation;
The cooling operation, be that daytime is during cooling, watch-dog monitoring of environmental temperature and air conditioner load by control system 6 change, and the compressor Energy Efficiency Ratio under which kind of operating mode that calculates refrigeration host computer 1 is the highest, the rotating speed that changes centrifugal compressor by frequency converter makes it to move under optimum condition, not enough refrigeration duty is provided by cold-storage groove 3, and cold more than needed is stored in the cold-storage groove 3.
In service at cooling, also comprise the comparison process step, be about to that control system 6 detected refrigeration host computers 1 moves the refrigerating capacity exported under maximum Energy Efficiency Ratio and user's air conditioner load compares, operate accordingly then, that is:
If control system 6 monitors refrigeration host computer 1 when move the refrigerating capacity of exporting equaling user's air-conditioning refrigeration duty under maximum Energy Efficiency Ratio, then by refrigeration host computer 1 directly to fan coil 4 coolings;
If control system 6 monitors refrigeration host computer 1 and move the requirement of the refrigerating capacity of output less than user's air conditioner load under maximum Energy Efficiency Ratio, then control system 6 controls to adjust electric T-shaped valves 53, open the path of fan coil 4 and cold-storage groove 3, the backwater that is come out by fan coil 4 is introduced into cold-storage groove 3 coolings, send into evaporimeter 12 through cooling water pump 72 again and further lower the temperature, be transported to user side again;
If control system 6 monitors refrigeration host computer 1 and move the air-conditioning refrigeration duty of the refrigerating capacity of output greater than the user under maximum Energy Efficiency Ratio, then control system 6 controls to adjust electric T-shaped valves 53, close the path of fan coil 4 and cold-storage groove 3, cold-storage groove 3 two ends valves 52,54 are opened, and store unnecessary cold.
Satisfy the residue load if control system 6 monitors the cold of cold-storage groove 3, then control system 6 control refrigeration host computers 1 are out of service, provide cold to fan coil 4 separately by cold-storage groove 3.
In said method, control system 6 realizes the switch of valve, the conversion of operating condition according to built-in algorithms and program.
In service at above-mentioned cold-storage, refrigeration host computer 1 single cold-storage operating mode was moved automatically by the time of setting, and out of service automatically in the low ebb electricity price period according to the second day required cold that predicts.
In sum, the present invention makes the refrigeration host computer of central air-conditioning all the time with the highest efficient operation, and the variation with outside air temperature, air conditioner load does not change, the maximization of energy-saving effect trend.In addition, utilize the peak and valley time electricity price to save considerable operating cost for the user.
Below embodiment has been described in detail the present invention in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details among the embodiment should not constitute limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (3)
1. the economical operation method of a central air-conditioning system is used for the central air-conditioning system operation, it is characterized in that: may further comprise the steps:
The cold-storage operation, be that night is during cold-storage, control system control fan coil entrance point valve closing, cold-storage groove two ends valve open, chilled water is come out to enter cold-storage groove through valve by the refrigeration host computer evaporimeter, and with groove in cool storage medium carry out heat exchange, the chilled water after the heat exchange confluxes at cold-storage groove collector pipe place and is transported to the refrigeration host computer evaporimeter through chilled water pump and lowers the temperature, finish cold-storage circulation, and by control system control refrigeration host computer all the time with high energy efficiency than operation;
The cooling operation, be that daytime is during cooling, watch-dog monitoring of environmental temperature and air conditioner load by control system change, and the compressor Energy Efficiency Ratio under which kind of operating mode that calculates refrigeration host computer is the highest, the rotating speed that changes centrifugal compressor by frequency converter makes it to move under optimum condition, not enough refrigeration duty is provided by cold-storage groove, and cold more than needed is stored in the cold-storage groove;
Described cooling is in service, also comprises the comparison process step, is about to that the detected refrigeration host computer of control system move the refrigerating capacity exported under maximum Energy Efficiency Ratio and user's air conditioner load compares, and operates accordingly then, that is:
If control system monitors refrigeration host computer when move the refrigerating capacity of exporting equaling user's air-conditioning refrigeration duty under maximum Energy Efficiency Ratio, then by refrigeration host computer directly to the fan coil cooling;
If control system monitors refrigeration host computer and move the requirement of the refrigerating capacity of output less than user's air conditioner load under maximum Energy Efficiency Ratio, then control system controls to adjust electric T-shaped valve, open the path of fan coil and cold-storage groove, the backwater that is come out by fan coil is introduced into the cold-storage groove cooling, send into evaporimeter through cooling water pump again and further lower the temperature, be transported to user side again;
If control system monitors refrigeration host computer and move the air-conditioning refrigeration duty of the refrigerating capacity of output greater than the user under maximum Energy Efficiency Ratio, then control system controls to adjust electric T-shaped valve, close the path of fan coil and cold-storage groove, cold-storage groove two ends valve opening is stored unnecessary cold;
Satisfy the residue load if control system monitors the cold of cold-storage groove, then control system control refrigeration host computer is out of service, provides cold to fan coil separately by cold-storage groove.
2. the economical operation method of central air-conditioning system according to claim 1 is characterized in that: described control system realizes the switch of valve, the conversion of operating condition according to built-in algorithms and program.
3. the economical operation method of central air-conditioning system according to claim 1, it is characterized in that: cold-storage is in service, refrigeration host computer list cold-storage operating mode was moved automatically by the time of setting, and out of service automatically in the low ebb electricity price period according to the second day required cold that predicts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100332783A CN101498494B (en) | 2008-01-31 | 2008-01-31 | Economical operation method for central air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100332783A CN101498494B (en) | 2008-01-31 | 2008-01-31 | Economical operation method for central air conditioning system |
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| Publication Number | Publication Date |
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| CN101498494A CN101498494A (en) | 2009-08-05 |
| CN101498494B true CN101498494B (en) | 2010-06-09 |
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| CN2008100332783A Expired - Fee Related CN101498494B (en) | 2008-01-31 | 2008-01-31 | Economical operation method for central air conditioning system |
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| CN102679649B (en) * | 2012-05-25 | 2014-10-29 | 王慧文 | Energy conservation control device and energy conservation control method of refrigerating system |
| CN102914028B (en) * | 2012-10-19 | 2015-12-16 | 广东美的制冷设备有限公司 | Energy-saving control method, system and air-conditioner |
| CN103062866A (en) * | 2013-01-04 | 2013-04-24 | 广东美的制冷设备有限公司 | Energy saving control method, energy saving control system and air conditioner |
| CN103234250B (en) * | 2013-05-15 | 2015-09-16 | 新奥科技发展有限公司 | A kind of water cool-storage technology system and operation method thereof |
| CN103277855B (en) * | 2013-05-29 | 2016-06-08 | 赖正伦 | A kind of distributed energy-accumulation control method and accumulation of energy device thereof |
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| CN109059154A (en) * | 2018-08-07 | 2018-12-21 | 王凯旋 | A kind of Commercial Complex shares cold source with for cold accumulation system and its control method |
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| JP7438976B2 (en) * | 2018-12-06 | 2024-02-27 | 東芝キヤリア株式会社 | air conditioner |
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| CN110145828A (en) * | 2019-06-12 | 2019-08-20 | 珠海格力电器股份有限公司 | Air conditioning system, integrated cold station and control method of integrated cold station |
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| CN114294737B (en) * | 2021-12-23 | 2022-11-25 | 珠海格力电器股份有限公司 | Refrigeration system, control method and air conditioner |
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- 2008-01-31 CN CN2008100332783A patent/CN101498494B/en not_active Expired - Fee Related
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