CN107327993A - A kind of high-efficiency refrigerating system and its refrigerating method - Google Patents
A kind of high-efficiency refrigerating system and its refrigerating method Download PDFInfo
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- CN107327993A CN107327993A CN201710550291.5A CN201710550291A CN107327993A CN 107327993 A CN107327993 A CN 107327993A CN 201710550291 A CN201710550291 A CN 201710550291A CN 107327993 A CN107327993 A CN 107327993A
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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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]
- Y02B30/54—Free-cooling systems
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Abstract
The present invention relates to a kind of high-efficiency refrigerating system and its refrigerating method, the high-efficiency refrigerating system includes the end-equipment for being used for the first free cooling tower EGR of free cooling refrigeration and being freezed, heat exchanger is provided between first free cooling tower EGR and end-equipment, also include the second free cooling tower EGR, cold water main unit is provided between the second free cooling tower EGR and end-equipment, the first outlet pipe is connected with heat exchanger, the second outlet pipe is connected with cold water main unit, the first chilled water circulating pump and the second chilled water circulating pump are correspondingly arranged on respectively on first outlet pipe and the second outlet pipe, branched pipe is communicated between first outlet pipe and the second outlet pipe, the first regulating valve is provided with branched pipe, the second regulating valve is additionally provided with second outlet pipe.High-efficiency refrigerating system and its refrigerating method of the present invention give full play to the cooling ability of cooling tower, and improve whole air-conditioning system cooling efficiency, save air-conditioning system operation energy consumption.
Description
Technical field
The present invention relates to air-conditioning refrigeration system technical field, more specifically to a kind of high-efficiency refrigerating system and its system
Cooling method.
Background technology
In order to reduce air conditioning energy consumption, at present, increasing system is in transition season and winter directly using cooling
Tower supplying cold directly, i.e., freely cool down cold supply system.Its operation principle is：In transition season and winter, outdoor environment temperature is relatively low,
Then cooling water temperature is exchanged heat to relatively low temperature by heat exchanger directly using the outdoor air of these low temperature,
Chilled water is down to target temperature, and chilled water is provided for air conditioning terminal.Because cooling tower cooling efficiency is cold water main unit cooling efficiency
15-25 times, therefore air-conditioning system cooling efficiency can be substantially increased by cooling tower cooling, save air conditioning energy consumption.
And free cooling system most of at present is all by heat exchanger chilled water to be cooled to target temperature using cooling tower
Directly chilled water is provided after degree for air conditioning terminal.But because cooling water temperature is limited directly by outdoor wet-bulb temperature, when outdoor is wet
When ball temperature is higher, directly it will be unable to meet system temperature requirement by free cooling system cooling, so as to cause free cooling system
System can not be run.Such as, when the chilled water leaving water temperature T1 of heat exchanger (5) is more than the target temperature T0 that chilled water system is set,
Work as T1>During T0, free cooling system will be unable to cooling.The chilled water leaving water temperature T1 of its tangible heat exchanger (5) is more than freezing
The target temperature T0 of water system setting but less than chilled water return main temperature Th, i.e. Th>T1>During T0, free cooling system is still
So there is certain cooling ability, but lead to not due to existing system the cooling ability that gives full play to cooling tower.
The content of the invention
It is an object of the invention to provide a kind of high-efficiency refrigerating system and its refrigerating method, solve and cool down in the prior art
The problem of cooling ability of tower can not give full play to.
The technical proposal for solving the technical problem of the invention is：A kind of high-efficiency refrigerating system, including for naturally cold
But the first free cooling tower EGR freezed and the end-equipment freezed, the first free cooling tower EGR with
It is provided between the end-equipment for being carried out between being set in the described first free cooling tower EGR and the end
The heat exchanger of heat exchange, the high-efficiency refrigerating system also includes the second free cooling tower EGR, freely cold described second
But it is provided with the cold water main unit for preparing chilled water, the heat exchanger and connects between tower EGR and the end-equipment
Have to be connected with the first outlet pipe being arranged between the heat exchanger and the end-equipment, the cold water main unit and be arranged on institute
State on the second outlet pipe between cold water main unit and the end-equipment, first outlet pipe and second outlet pipe respectively
Be correspondingly arranged on the first chilled water circulating pump and the second chilled water circulating pump, first outlet pipe and second outlet pipe it
Between be communicated with branched pipe, be provided with the branched pipe on the first regulating valve, second outlet pipe and be additionally provided with the second tune
Save valve.
In the high-efficiency refrigerating system of the present invention, it is provided with first outlet pipe for detecting the cold of the heat exchanger
Freeze the first temperature sensor of the leaving water temperature of water.
In the high-efficiency refrigerating system of the present invention, first outlet pipe is with second outlet pipe at the first commissure point
Interaction connection, is additionally provided with chilled water outfall sewer, and the freezing between the first commissure point and the end-equipment
Water outfall sewer is interconnected with first outlet pipe and second outlet pipe respectively, on the chilled water outfall sewer
It is provided with the second temperature sensor for detecting chilled water outfall sewer temperature.
In the high-efficiency refrigerating system of the present invention, it is also associated with being arranged on the heat exchanger and the end on the heat exchanger
It is also associated with being arranged on the cold water main unit and the end-equipment on the first return pipe between end equipment, the cold water main unit
Between the second return pipe, first return pipe interacts connection with second return pipe at the second commissure point, described
Be additionally provided with chilled water return main between second commissure point and the end-equipment, and the chilled water return main respectively with
First return pipe and second return pipe are interconnected, and are provided with the chilled water return main for detecting cold
Freeze the three-temperature sensor of water return main's temperature.
In the high-efficiency refrigerating system of the present invention, the high-efficiency refrigerating system also includes the temperature for being used to detect outdoor temperature humidity
Humidity sensor.
The present invention high-efficiency refrigerating system in, the high-efficiency refrigerating system also include respectively with first TEMP
Device, second temperature sensor, three-temperature sensor, Temperature Humidity Sensor, the first regulating valve, the second regulating valve, the first freezing
The controller that water-circulating pump and the second chilled water circulating pump are communicatively connected.
Present invention also offers the refrigerating method of above-mentioned high-efficiency refrigerating system, including：
Obtain outdoor wet-bulb temperature；
When it is determined that during outdoor wet-bulb temperature≤first threshold, then opening the first free cooling tower EGR and heat exchanger；
When it is determined that during outdoor wet-bulb temperature ＞ first thresholds, then opening the first free cooling tower EGR simultaneously, exchanging heat
Device, the second free cooling tower EGR and cold water main unit.
In the refrigerating method of the present invention, when it is determined that during outdoor wet-bulb temperature≤first threshold, opening first and freely cooling down
After tower EGR and heat exchanger, in addition to：
Open the first chilled water circulating pump；
The freezing leaving water temperature T1 of the first outlet pipe of heat exchanger is obtained,
When determining freezing leaving water temperature T1≤Second Threshold of the first outlet pipe of heat exchanger, then it is in the first regulating valve
Closed mode.
In the refrigerating method of the present invention, when it is determined that the threshold of freezing leaving water temperature T1≤second of the first outlet pipe of heat exchanger
During value, in addition to：
Obtain the chilled water return water temperature Th of end-equipment；
When determining chilled water return water temperature Th three threshold values of ＞ of end-equipment, then the second free cooling tower circulation dress is opened
Put and cold water main unit, the second regulating valve and the second chilled water circulating pump is in opening.
In the refrigerating method of the present invention, when it is determined that outdoor wet-bulb temperature ＞ first thresholds, while it is freely cold to open first
But after tower EGR, heat exchanger, the second free cooling tower EGR and cold water main unit, in addition to：
Open the first chilled water circulating pump；
The freezing leaving water temperature T1 of the first outlet pipe of heat exchanger is obtained,
Determine the first outlet pipe of heat exchanger freezing leaving water temperature T1 ＞ Second Thresholds and ＜ end-equipments simultaneously it is cold
When freezing water return water temperature Th, then the first regulating valve and the second regulating valve is in open mode simultaneously, make the first freezing water circulation
Pump is closed, and the second chilled water circulating pump is in open mode.
Implement the high-efficiency refrigerating system and its refrigerating method of the present invention, have the advantages that：Highly effective refrigeration of the present invention
System and its refrigerating method can be normally in addition to coolings when ensure that original system in T1≤T0, additionally it is possible to so that Th>T1>
During T0, still can normal cooling, give full play to the cooling ability of cooling tower, extend the free cooling system cooling time, raising
Free cooling system utilization rate, improves whole air-conditioning system cooling efficiency, saves air-conditioning system operation energy consumption；Improve simultaneously certainly
By cooling system cooling temperature range of operation, i.e., T1 is brought up to by original T1≤T0<Th (wherein Th>T0)；And in actual fortune
During row, no matter how T1 to change, can by adjust the first regulating valve and the second regulating valve realize freely cool down with it is cold
Water main frame air conditioning, and ensure that chilled water water main's temperature T0 reaches target temperature, it can both give full play to free cooling
Cooling ability, can guarantee that chilled water cooling temperature is stable again.
Brief description of the drawings
Fig. 1 is the structural representation of the high-efficiency refrigerating system of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the high-efficiency refrigerating system and its refrigerating method of the present invention are described further：
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
"front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " clockwise ", " counterclockwise " etc. are indicated
Orientation or position relationship are, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplification is retouched
State, rather than indicate or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.
As shown in figure 1, high-efficiency refrigerating system include for free cooling refrigeration the first free cooling tower EGR with
The end-equipment (not indicated in figure) freezed.The first free cooling tower EGR specifically include the first cooling tower 1 and
The first cooling water circulating pump 3 set on the outlet pipe 101 of first cooling tower 1.End-equipment refers to tail end air conditioner etc. by cooling
Freeze water and then the cooling apparatus directly used for user.
It is provided between the first free cooling tower EGR and end-equipment in the first free cooling tower circulation
Device and end carry out the heat exchanger 5 of heat exchange between setting.Specifically, first is passed through between the first cooling tower 1 and heat exchanger 5
The return pipe 102 of the cooling tower 1 of outlet pipe 101 and first of cooling tower 1 realizes interactive connection.
High-efficiency refrigerating system also includes the second free cooling tower EGR, similarly, the second free cooling tower circulation dress
Put the second cooling water circulating pump 4 for specifically including the second cooling tower 2 and being set on the outlet pipe 201 of the second cooling tower 2.
The cold water main unit for preparing chilled water is provided between the second free cooling tower EGR and end-equipment
6, specifically, pass through the cooling tower 2 of outlet pipe 201 and second of the second cooling tower 2 between the second cooling tower 2 and cold water main unit 6
Return pipe 202 realizes interactive connection.Cold water main unit 6 is different from the first cooling tower 1 and the second cooling tower 2, the first cooling tower 1 and
Two cooling towers 2 are the cryogenic refrigerations by external environment, and cold water main unit 6 needs power, and such as electric power achieves refrigeration.
The first outlet pipe 51 being arranged between heat exchanger 5 and end-equipment is connected with heat exchanger 5 and is arranged on and is changed
The first return pipe 52 between hot device 5 and end-equipment.It is connected with cold water main unit 6 and is arranged on cold water main unit 6 and is set with end
The second outlet pipe 61 between standby and the second return pipe 62 being arranged between cold water main unit 6 and end-equipment.
It is correspondingly arranged on the first chilled water circulating pump 9 and second respectively on the first outlet pipe 51 and the second outlet pipe 61 cold
Freeze water-circulating pump 10.Branched pipe 71 is communicated between the first outlet pipe 51 and the second outlet pipe 61, is set on branched pipe 71
Have and be additionally provided with the second regulating valve 8 on the first regulating valve 7, the second outlet pipe 51.It is provided with the first outlet pipe 51 for examining
Survey the first temperature sensor 11 of the leaving water temperature of the chilled water of heat exchanger 5.
First outlet pipe 51 interacts connection with the second outlet pipe 61 at the first commissure point 100, the first commissure point 100 with
Be additionally provided with chilled water outfall sewer 30 between end-equipment, and chilled water outfall sewer 30 respectively with the first outlet pipe 51 and
Two outlet pipes 61 are interconnected, and the one end of chilled water outfall sewer 30 away from the first commissure point 100 is connected with end-equipment.
The second temperature sensor 12 for detecting chilled water outfall sewer temperature is provided with chilled water outfall sewer 30.
First return pipe 52 interacts connection with the second return pipe 62 at the second commissure point 200, the second commissure point 200 with
Be additionally provided with chilled water return main 40 between end-equipment, and chilled water return main 40 respectively with the first return pipe 52 and
Two return pipes 62 are interconnected, and the one end of chilled water return main 40 away from the second commissure point 200 is connected with end-equipment.
The three-temperature sensor 13 for detecting chilled water return main's temperature is provided with chilled water return main 40.
High-efficiency refrigerating system also include be used for detect outdoor temperature humidity Temperature Humidity Sensor 14 and respectively with first temperature
Spend sensor 11, second temperature sensor 12, three-temperature sensor 13, Temperature Humidity Sensor 14, the first regulating valve 7, second
The controller 15 that regulating valve 8, the first chilled water circulating pump 9 and the second chilled water circulating pump 10 are communicatively connected.Control
Device 15 is in addition to controlling said apparatus, and the temperature humidity calculating for being additionally operable to be surveyed Temperature Humidity Sensor 14 is converted to wet bulb temperature
Degree.Its communication modes can be wire communication connection or wireless communication connection.
Present invention also offers the refrigerating method of above-mentioned high-efficiency refrigerating system, the refrigerating method includes：
Obtain outdoor wet-bulb temperature；
When it is determined that during outdoor wet-bulb temperature≤first threshold, then opening the first free cooling tower EGR and heat exchanger 5；
When it is determined that during outdoor wet-bulb temperature ＞ first thresholds, then opening the first free cooling tower EGR simultaneously, exchanging heat
Device 5, the second free cooling tower EGR and cold water main unit 6.
Wherein, the situation of outdoor wet-bulb temperature≤first threshold is typically referred in the winter time, and outdoor temperature is sufficiently low；And it is outdoor
The situation of wet-bulb temperature ＞ first thresholds is typically referred in transition season, and outdoor temperature is of a relatively high, cooling water supply temperature
It is higher.
When it is determined that during outdoor wet-bulb temperature≤first threshold, open after the first free cooling tower EGR and heat exchanger 5,
Also include：
Open the first chilled water circulating pump 9；
The freezing leaving water temperature T1 of the first outlet pipe 51 of heat exchanger 5 is obtained,
When determining freezing leaving water temperature T1≤Second Threshold of the first outlet pipe 51 of heat exchanger 5, then make the first regulating valve 7
It is closed.
Second Threshold refers to target supply water temperature, and the target supply water temperature is the temperature for the chilled water for reaching end-equipment.
Therefore, when T1≤Second Threshold, the first regulating valve 7 is closed, only by the first free cooling tower EGR, changed
Hot device 5, the first chilled water circulating pump 9 provide chilled water for end-equipment.
When it is determined that heat exchanger 5 the first outlet pipe 51 freezing leaving water temperature T1≤Second Threshold when, in addition to：
Obtain the chilled water return water temperature Th of end-equipment；
When determining Th three threshold values of ＞, then the second free cooling tower EGR and cold water main unit 6 is opened, makes the second regulation
The chilled water circulating pump 10 of valve 8 and second is in opening.
The situation of the threshold values of Th ＞ the 3rd refers to open the first free cooling tower EGR, heat exchanger 5 and first merely cold
Freeze water-circulating pump 9, it is impossible to meet the situation of whole system burden requirement.Now then need to open the second free cooling tower circulation dress
Put, cold water main unit 6, the second regulating valve 8 and the second chilled water circulating pump 10, while cooling.Wherein, the 3rd threshold value is preferably 7-12
DEG C, but other temperature are also within the scope of the present invention.
When it is determined that outdoor wet-bulb temperature ＞ first thresholds, at the same open the first free cooling tower EGR, heat exchanger 5,
After second free cooling tower EGR and cold water main unit 6, in addition to：
Open the first chilled water circulating pump 9；
The freezing leaving water temperature T1 of the first outlet pipe 51 of heat exchanger 5 is obtained,
Determine the first outlet pipe 51 of heat exchanger 5 freezing leaving water temperature T1 ＞ Second Thresholds and simultaneously ＜ Th when, then together
When the first regulating valve 7 and the second regulating valve 8 is in open mode, be closed the first chilled water circulating pump 9, make the
Two chilled water circulating pumps 10 are in open mode.
That is, in transition season, when outdoor temperature is of a relatively high, cooling water supply temperature is also higher, so as to cause
The chilled water leaving water temperature T1 of heat exchanger 5 is more than Second Threshold, i.e. target supply water temperature, but as long as T1 is less than the cold of end-equipment
Freeze water return water temperature Th, i.e. T1<Th, need to now be carried out by the first free cooling tower EGR, heat exchanger 5 with cold water main unit 6
Air conditioning.First regulating valve 7 and the second regulating valve 8 are opened, but the first chilled water circulating pump 9 is closed, the freezing of heat exchanger 5
Water water outlet will pass through the first regulating valve 7, and end-equipment is delivered to by the pressurization of the second chilled water circulating pump 10.
It should be noted that the freezing leaving water temperature T1 of the first outlet pipe 51 of above-mentioned outdoor temperature humidity, heat exchanger 5, end
The chilled water return water temperature Th of end equipment can be passed by Temperature Humidity Sensor 14, the first temperature sensor 11, the 3rd temperature respectively
Sensor 13 is obtained, and is sent to controller 15, and controller 15 needs according to outdoor humiture calculate to obtain the wet of outdoor
Ball temperature, controller 15 obtains said temperature and simultaneously judged, and then cold to the first free cooling tower EGR, the second freedom
But tower EGR, heat exchanger 5, cold water main unit 6, the first regulating valve 7, the second regulating valve 8, the first chilled water circulating pump 9, second
Chilled water circulating pump 10 is controlled regulation.Can also manually it be controlled to adjust in other embodiments.
High-efficiency refrigerating system and its refrigerating method of the present invention are except ensure that original system can be normal in T1≤T0
Outside cooling, additionally it is possible to so that Th>T1>During T0, still can normal cooling, give full play to the cooling ability of cooling tower, extension from
By the cooling system cooling time, free cooling system utilization rate is improved, whole air-conditioning system cooling efficiency is improved, air-conditioning system is saved
System operation energy consumption；Free cooling system cooling temperature range of operation is improved simultaneously, i.e., T1 is brought up to by original T1≤T0<Th
(wherein Th>T0)；And in actual moving process, can be by adjusting the first regulating valve and second no matter how T1 changes
Regulating valve, which is realized, freely to be cooled down and cold water main unit air conditioning, and ensures that chilled water water main's temperature T0 reaches target temperature,
Both it can give full play to and freely cool down cooling ability, and can guarantee that chilled water cooling temperature is stable again.
It should be appreciated that it will be understood by those skilled in the art that can according to the above description be improved or converted, but this
A little improvement or conversion should all belong within the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of high-efficiency refrigerating system, including the first free cooling tower EGR for free cooling refrigeration and freezed
End-equipment, is provided between first free the cooling tower EGR and the end-equipment for free described first
Cooling tower EGR and the end carry out the heat exchanger of heat exchange between setting, it is characterised in that the highly effective refrigeration system
System also includes the second free cooling tower EGR, between the described second free cooling tower EGR and the end-equipment
It is provided with the cold water main unit for preparing chilled water, the heat exchanger to be connected with and is arranged on the heat exchanger and is set with the end
It is connected with and is arranged between the cold water main unit and the end-equipment on the first outlet pipe between standby, the cold water main unit
The first chilled water circulating pump and are correspondingly arranged on second outlet pipe, first outlet pipe and second outlet pipe respectively
Two chilled water circulating pumps, are communicated with branched pipe, on the branched pipe between first outlet pipe and second outlet pipe
It is provided with the first regulating valve, second outlet pipe and is additionally provided with the second regulating valve.
2. high-efficiency refrigerating system according to claim 1, it is characterised in that be provided with first outlet pipe for examining
Survey the first temperature sensor of the leaving water temperature of the chilled water of the heat exchanger.
3. high-efficiency refrigerating system according to claim 2, it is characterised in that first outlet pipe and second water outlet
Pipe interacts connection at the first commissure point, and chilled water water outlet is additionally provided between the first commissure point and the end-equipment
House steward, and the chilled water outfall sewer is interconnected with first outlet pipe and second outlet pipe respectively, described
The second temperature sensor for detecting chilled water outfall sewer temperature is provided with chilled water outfall sewer.
4. high-efficiency refrigerating system according to claim 3, it is characterised in that be also associated with being arranged on institute on the heat exchanger
State and be also associated with being arranged on the cold water master on the first return pipe between heat exchanger and the end-equipment, the cold water main unit
The second return pipe between machine and the end-equipment, first return pipe is with second return pipe at the second commissure point
Interaction connection, is additionally provided with chilled water return main, and the freezing between the second commissure point and the end-equipment
Water return main is interconnected with first return pipe and second return pipe respectively, on the chilled water return main
It is provided with the three-temperature sensor for detecting chilled water return main's temperature.
5. high-efficiency refrigerating system according to claim 4, it is characterised in that the high-efficiency refrigerating system also includes being used to examine
Survey the Temperature Humidity Sensor of outdoor temperature humidity.
6. high-efficiency refrigerating system according to claim 5, it is characterised in that the high-efficiency refrigerating system also include respectively with
First temperature sensor, second temperature sensor, three-temperature sensor, Temperature Humidity Sensor, the first regulating valve, second
The controller that regulating valve, the first chilled water circulating pump and the second chilled water circulating pump are communicatively connected.
7. the refrigerating method of the high-efficiency refrigerating system described in a kind of any one of claim 1-6 claim, it is characterised in that bag
Include：
Obtain outdoor wet-bulb temperature；
When it is determined that during outdoor wet-bulb temperature≤first threshold, then opening the first free cooling tower EGR and heat exchanger；
When it is determined that during outdoor wet-bulb temperature ＞ first thresholds, then opening the first free cooling tower EGR, heat exchanger, the simultaneously
Two free cooling tower EGRs and cold water main unit.
8. refrigerating method according to claim 7, it is characterised in that when it is determined that during outdoor wet-bulb temperature≤first threshold,
Open after the first free cooling tower EGR and heat exchanger, in addition to：
Open the first chilled water circulating pump；
The freezing leaving water temperature T1 of the first outlet pipe of heat exchanger is obtained,
When determining freezing leaving water temperature T1≤Second Threshold of the first outlet pipe of heat exchanger, then the first regulating valve is set to be in closing
State.
9. refrigerating method according to claim 8, it is characterised in that when it is determined that the freezing of the first outlet pipe of heat exchanger goes out
During coolant-temperature gage T1≤Second Threshold, in addition to：
Obtain the chilled water return water temperature Th of end-equipment；
When determining chilled water return water temperature Th three threshold values of ＞ of end-equipment, then open the second free cooling tower EGR with
Cold water main unit, makes the second regulating valve and the second chilled water circulating pump be in opening.
10. refrigerating method according to claim 7, it is characterised in that when it is determined that outdoor wet-bulb temperature ＞ first thresholds, together
After the free cooling tower EGRs of Shi Kaiqi first, heat exchanger, the second free cooling tower EGR and cold water main unit, also wrap
Include：
Open the first chilled water circulating pump；
The freezing leaving water temperature T1 of the first outlet pipe of heat exchanger is obtained,
Determine the freezing leaving water temperature T1 ＞ Second Thresholds and the chilled water of ＜ end-equipments simultaneously of the first outlet pipe of heat exchanger
During return water temperature Th, then the first regulating valve and the second regulating valve is in open mode simultaneously, make at the first chilled water circulating pump
In closed mode, the second chilled water circulating pump is set to be in open mode.
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| CN201710550291.5A CN107327993B (en) | 2017-07-07 | 2017-07-07 | Refrigerating system and refrigerating method thereof |
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Cited By (4)
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| CN109798732A (en) * | 2019-01-25 | 2019-05-24 | 江苏柯瑞机电工程股份有限公司 | A kind of energy-efficient refrigeration system |
| CN109798717A (en) * | 2019-01-25 | 2019-05-24 | 东南大学 | A kind of cooling system that realizing high accuracy temperature control and its control method |
| CN114087830A (en) * | 2021-11-17 | 2022-02-25 | 浙江晨浩智能科技有限公司 | Efficient and energy-saving industrial cooling water system and control method |
| CN114623636A (en) * | 2022-05-17 | 2022-06-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Circulating water system for classified regulation of cooling water temperature |
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| CN106839218A (en) * | 2017-03-10 | 2017-06-13 | 深圳达实智能股份有限公司 | Central air conditioner system efficiency lifting assembly and its control method |
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| CN109798717A (en) * | 2019-01-25 | 2019-05-24 | 东南大学 | A kind of cooling system that realizing high accuracy temperature control and its control method |
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| CN114623636A (en) * | 2022-05-17 | 2022-06-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Circulating water system for classified regulation of cooling water temperature |
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