CN115574392B - External ice-melting open type primary pump system, cooling method, medium and equipment thereof - Google Patents
External ice-melting open type primary pump system, cooling method, medium and equipment thereof Download PDFInfo
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- CN115574392B CN115574392B CN202211366180.6A CN202211366180A CN115574392B CN 115574392 B CN115574392 B CN 115574392B CN 202211366180 A CN202211366180 A CN 202211366180A CN 115574392 B CN115574392 B CN 115574392B
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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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—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 cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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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
- F24F11/62—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—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 cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
- F24F2005/0032—Systems storing energy during the night
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The application discloses an external ice melting open type primary pump system, a cooling method, a storage medium and computer equipment. The cooling method comprises the following steps: responding to different preset working conditions, and selecting at least one of a base load host, a double-station host and an ice storage pool to participate in cooling; and selecting a first regulating valve or a constant pressure device to regulate based on whether the ice storage pool participates in cold supply or not so as to enable the lowest point of the system pressure downstream of the user side heat exchanger to be in positive pressure operation. By means of the mode, the external ice melting and cooling method can effectively ensure safe and efficient operation of the external ice melting open type primary pump system.
Description
Technical Field
The invention relates to the technical field of air conditioner refrigeration, in particular to an external ice-melting open type primary pump system, a cooling method, a storage medium and computer equipment.
Background
In the technical field of ice cold accumulation air conditioners, the external ice melting system has the advantages of high cooling speed, good heat exchange effect, low water outlet temperature, low ice melting energy consumption and the like, and is suitable for low-temperature-difference cooling of large-area cooling items. The external ice melting can be divided into an open system and a closed system. The cold water of the external ice melting open type cold accumulation system directly enters the ice pool to be taken cold, and is conveyed to the user side through the water pump, compared with a closed system, the heat exchange of the ice melting heat exchanger is reduced, the water supply temperature of the cold water is lower, and the equipment initial investment, the occupied area and the system operation energy consumption are reduced compared with those of the closed system, so that the external ice melting open type cold accumulation system has more advantages.
The existing external ice melting open type cold accumulation system generally adopts a system form of serial connection of upstream of a host, and a secondary pump is arranged, namely, each upstream host branch is provided with a primary pump, so that the resistance of the host and an attached valve thereof is overcome, and the flow distribution is regulated at the same time; an external net circulating pump (a secondary pump) is arranged behind the ice pool, so that external net resistance is overcome. This system type water pump has higher initial investment and requires more equipment space to arrange the pump group. In addition, because the ice storage tank of the external ice melting open type cold storage system is generally arranged at the lowest part of the basement and is directly connected with the atmosphere, and the user side heat exchanger is generally higher than the inner pipe system of the cold station, the height difference h between the highest point of the pipe system and the liquid level of the ice storage tank leads to the risk of negative pressure operation of the system, reduces the efficiency of the conveying and distributing system and even corrodes the pipe system.
Disclosure of Invention
The invention provides an external ice melting open type primary pump system, a cooling method, a storage medium and computer equipment, wherein the height difference h between the highest point of a pipeline system and the liquid level of an ice pool is used as the power for conveying and distributing an upstream base load host and a double-working-condition heat exchanger, the existing system form is optimized, the initial investment and equipment space of a water pump are reduced, and meanwhile, the technical measures are taken to avoid the negative pressure operation of the pipeline of the system.
In order to solve the technical problems, one technical scheme adopted by the application is as follows: a cooling method of an external ice melting open type primary pump system is provided. The cooling method comprises the following steps: responding to different preset working conditions, and selecting at least one of a base load host, a double-station host and an ice storage pool to participate in cooling; based on whether the ice storage pool participates in cold supply, a first regulating valve or a constant pressure device is selected for regulation, so that the lowest point of the system pressure at the downstream of the user side heat exchanger is in positive pressure operation; the external ice melting open type primary pump system comprises the base load host, a double-working-condition heat exchanger, the double-working-condition host, the ice storage tank, a circulating pump, a user side heat exchanger, a first switching valve, a second switching valve, a third switching valve, a first regulating valve, a second regulating valve, a first bypass pipe, a second bypass pipe and the constant pressure device; the base load host, the double-condition heat exchanger and the first bypass pipe which are connected in parallel are sequentially connected in series with the ice storage tank, the second bypass pipe, the circulating pump and the user side heat exchanger which are connected in parallel, and the double-condition host is respectively communicated with the ice coil pipe of the ice storage tank and the double-condition heat exchanger; the base load host, the double-working-condition heat exchanger and the parallel branch corresponding to the first bypass pipe are respectively provided with the first switch valve, the second switch valve and the third switch valve; the parallel branch corresponding to the second bypass pipe of the ice storage tank is provided with the first regulating valve and the second regulating valve respectively; the constant pressure device is connected with the suction inlet of the circulating pump.
In order to solve the technical problems, another technical scheme adopted by the application is as follows: a storage medium is provided. The storage medium has stored thereon program data which, when executed by a processor, implements the steps of the external ice melting and cooling method described above.
In order to solve the technical problem, another technical scheme adopted by the application is as follows: a computer device is provided. The computer device comprises a processor and a memory which are connected with each other, wherein the memory stores a computer program, and the steps of the external ice melting and cooling method are realized when the processor executes the computer program.
In order to solve the technical problem, the application adopts a further technical scheme that: an external ice-melt type cold accumulation system is provided. The external ice-melting open type primary pump system comprises a base load host, a double-working-condition heat exchanger, a double-working-condition host, an ice storage tank, a circulating pump, a user side heat exchanger, a first switching valve, a second switching valve, a third switching valve, a first regulating valve, a second regulating valve, a first bypass pipe, a second bypass pipe, a constant pressure device and computer equipment; the base load host, the double-condition heat exchanger and the first bypass pipe which are connected in parallel are sequentially connected in series with the ice storage tank, the second bypass pipe, the circulating pump and the user side heat exchanger which are connected in parallel, and the double-condition host is respectively communicated with the ice coil pipe of the ice storage tank and the double-condition heat exchanger; the base load host, the double-working-condition heat exchanger and the parallel branch corresponding to the first bypass pipe are respectively provided with the first switch valve, the second switch valve and the third switch valve; the parallel branch corresponding to the second bypass pipe of the ice storage tank is provided with the first regulating valve and the second regulating valve respectively; the constant pressure device is connected with the suction inlet of the circulating pump; the computer device is in communication connection with the first switch valve, the second switch valve, the third switch valve, the first regulating valve, the second regulating valve and the constant pressure device.
The beneficial effects of this application are: different from the prior art, the application discloses an external ice melting open type primary pump system, a cooling method, a storage medium and computer equipment. The height difference h between the highest point of the pipeline system and the liquid level of the ice pool is used as the power for conveying and distributing the upstream base load host and the double-station heat exchanger, so that the existing system form is optimized, and the initial investment of the water pump and the equipment space are reduced. Meanwhile, the pressure of the lowest point of the system pressure is ensured to be in positive pressure operation by adopting the constant pressure device, so that the operation safety of the external ice melting open type primary pump system can be effectively improved.
Drawings
For a clearer description of embodiments of the present application or of the solutions of the prior art, the drawings that are required to be used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the present application, and that other drawings may be obtained, without inventive effort, by a person skilled in the art from these drawings, in which:
FIG. 1 is a system schematic diagram of one embodiment of an external ice-melt open primary pump system provided herein;
FIG. 2 is a schematic flow chart of an embodiment of an external ice melting and cooling method provided in the present application;
fig. 3 is a schematic structural diagram of an embodiment of a storage medium provided in the present application.
Fig. 4 is a schematic structural diagram of an embodiment of a computer device provided in the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "first," "second," "third," and the like in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of an embodiment of an external ice-melting open primary pump system provided herein.
The external ice-melting open type primary pump system 100 comprises an ice storage tank 10, a circulating pump 20, a double-working condition host circulating pump 21, a base host 30, a double-working condition host 31, a double-working condition heat exchanger 40 and a user side heat exchanger 41, and further comprises a first bypass pipe 51, a second bypass pipe 52, a first regulating valve 61 and a second regulating valve 62, a first switching valve 71, a second switching valve 72, a third switching valve 73, a fourth switching valve 74, a fifth switching valve 75 and a constant pressure device 80.
Specifically, the base load host 30 and the dual-condition heat exchanger 40 are connected in parallel with the first bypass pipe 51, wherein the first bypass pipe 51 is provided with a third switch valve 73, the first pipeline 53 is provided with the base load host 30, and meanwhile is also provided with a first switch valve 71; the second line 54 is provided with the dual mode heat exchanger 40 and a second on-off valve 72. The three downstream sides are connected in series with the ice bank 10 through a third pipeline 55, and meanwhile, the second bypass pipe 52 is connected in parallel with the ice bank 10. The third pipeline 55 is provided with a first regulating valve 61 and is positioned upstream of the ice storage tank 10; the second bypass pipe 52 is provided with a second regulating valve 62. The circulating pump 20 is communicated with the ice storage tank 10 and the second bypass pipe 52, and can pump water from the ice storage tank 10 or convey cold water prepared by an upstream cold machine to the position of the user side heat exchanger 41 according to the requirement, so that low-temperature cold supply is realized.
Namely, the base host 30, the dual-condition heat exchanger 40 and the first bypass pipe 51 connected in parallel are connected in series with the ice bank 10 and the second bypass pipe 52 connected in parallel, and the circulation pump 20 and the user side heat exchanger 41 in this order.
The first regulating valve 61 and the second regulating valve 62 may be a single valve or a plurality of valves connected in parallel according to the flow rate and the pressure difference; the valves may be of the same caliber or of different calibers. The first regulating valve 61 is used for ensuring positive pressure at the lowest point of the system pressure, and the second regulating valve 62 is used for regulating the flow rate of the second bypass pipe 52.
Specifically, the first regulating valve 61 is used for regulating the pressure at the lowest system pressure point a downstream of the user side heat exchanger 41 when the ice storage tank 10 participates in cold supply, so that the lowest system pressure point a is in positive pressure operation, and the second regulating valve 62 is used for regulating the flow rate based on the preset temperature of cold water to be delivered, so that the outlet water temperature after the third pipeline 55 and the second bypass pipe 52 are mixed meets the requirement, and the mixed outlet water temperature is delivered to the user side heat exchanger 41 by the circulating pump 20, so as to supply cold.
The constant pressure device 80 is connected with the suction inlet of the circulating pump 20; when the ice bank 10 does not participate in the cooling, the first regulating valve 61 is closed, the second regulating valve 62 is opened, and the constant pressure device 80 is opened so that the system pressure lowest point a is in positive pressure operation.
That is, the present application further relates the action of the first regulating valve 61 to the pressure of the lowest point a of the system pressure, and when the ice storage tank 10 participates in cold supply, the lowest point a of the system pressure is in positive pressure operation by the regulation of the first regulating valve 61, so as to improve the operation safety of the external ice-melting open type primary pump system 100.
Further, the double-working-condition host 31 is respectively connected with the ice coil pipe 56 and the double-working-condition heat exchanger 40 in the ice storage tank 10, the ice coil pipe 56 and the double-working-condition heat exchanger 40 are connected in parallel, a fourth switching valve 74 and a fifth switching valve 75 are respectively arranged on corresponding branches, and working conditions are switched between the fourth switching valve 74 and the fifth switching valve 75 so as to meet different use requirements; the dual-condition main machine circulating pump 21 provides power for transmission and distribution. The fourth switch valve 74 is used for controlling whether the ice coil 56 is connected to the dual-mode host 31 or not, and the fifth switch valve 75 is used for controlling whether the dual-mode heat exchanger 40 is connected to the dual-mode host 31 or not.
The number of the user side heat exchangers 41 may be one or more according to the number of the users, and the user side heat exchangers are all in parallel connection.
Further, depending on the magnitude of the cooling load, one or more of the base host 30, the dual-mode host 31, and the dual-mode heat exchanger 40 may be connected in parallel, and accordingly, one or more of the first pipe 53, the first switch valve 71, the second pipe 54, the second switch valve 72, and the dual-mode host circulation pump 21 may be connected.
Further, depending on the magnitude of the cooling load, the circulation pump 20 may be one or more, and the plurality of circulation pumps 20 are all in parallel connection.
It should be noted that, since the ice storage tank of the external ice melting open type cold storage system is generally disposed at the lowest position of the basement and is directly connected with the atmosphere, and the user side heat exchanger is generally higher than the pipeline system in the cold station, the height difference h between the highest point of the pipeline system and the liquid level of the ice storage tank causes the risk of negative pressure operation of the system, thus reducing the efficiency of the transmission and distribution system and even corroding the pipeline system. The existing system has no consideration on the problems, so that the system has certain safety risks. Valves are generally arranged in front of the ice storage tank and in the bypass branch of the ice storage tank in the existing external ice melting open type cold storage system, but the valves only have the functions of working condition switching and flow regulation and are irrelevant to safe operation of the system.
In the application, the first regulating valve 61 is arranged to regulate according to the lowest pressure point of the system, so that the system is ensured not to run under negative pressure, and the safe and efficient running of the system is ensured.
Specifically, in this embodiment, a pressure sensor is disposed at a point a of the most adverse pressure point of the external ice-melting open primary pump system 100, and the pressure data can be fed back to be used as a basis for the action of the first regulating valve 61, and the pressure at the point a is regulated and controlled to be greater than the external atmospheric pressure by the first regulating valve 61 or the constant pressure device 80. The number above can be any value greater than 0, and the pressure at the point A is generally controlled to be greater than the external atmospheric pressure by 0.5 meter water column.
It should also be noted that, for the height difference h existing between the highest point of the above-mentioned pipe system and the ice pool liquid level, it is overcome by the circulation pump 20. For the upstream base load host 30 and the double condition heat exchanger 40 after the point A, the pressure head generated by the height difference h can be used as the power for the transmission and distribution of the pressure head to overcome all or part of the resistance.
The existing external ice-melting open type cold accumulation system is generally provided with independent water pumps on the branches of an upstream base load host and a double-condition heat exchanger, so that on one hand, the resistance of the base load host and the double-condition heat exchanger is overcome, and on the other hand, the flow of different branches is regulated to meet the cold supply requirement. In this case, in order to ensure positive pressure at point a, the valve in front of the ice-storage tank needs to maintain a large resistance, and most of the pressure head generated by the height difference h is consumed by the valve, that is, some of the pressure head provided by the circulating pump is consumed by the valve, which obviously causes a certain energy waste.
The method does not provide a separate water pump on the branches of the upstream base load host 30 and the double-condition heat exchanger 40, and adopts a first switch valve 71 and a second switch valve 72 for adjusting the flow of different branches; and a third switching valve 73 is provided on the first bypass pipe 51 to switch different working conditions.
Compared with the existing external ice melting open type primary pump system, the external ice melting open type primary pump system 100 provided by the application cancels an upstream water pump, saves the primary investment of the water pump and the equipment space of a machine room, improves the utilization efficiency of the circulating pump 20, and enables the circulating pump to operate more energy-effectively. In addition, by detecting the lowest pressure point of the system and taking the pressure value as the action basis of the first regulating valve 61, the system is ensured not to run under negative pressure, and the safe and efficient operation of the system is ensured.
Further, the external ice-melting open type primary pump system 100 is divided into a daytime cooling mode and a nighttime cooling mode based on whether the ice bank 10 is ice-storing.
Wherein, in the daytime cooling mode, at least one of the ice bank 10, the base host 30 and the dual-condition host 31 participates in cooling; in the night cooling mode, the ice bank 10 stores ice, the first regulating valve 61 is closed, the second regulating valve 62 and the first switching valve 71 are opened, the base host 30 participates in cooling alone, and the second switching valve 72 and the third switching valve 73 are closed.
Wherein, when the ice bank 10 is storing ice in the night cold supply mode, the dual-station host 31 supplies cold to the ice bank 10 through the ice coil 56, the fourth switch valve 74 is opened and the fifth switch valve 75 is closed; when the ice bank 10 does not store ice in the daytime cooling mode and the dual-working-condition host machine 31 participates in cooling, the fourth switching valve 74 is closed and the fifth switching valve 75 is opened, and the low-temperature coolant generated by the dual-working-condition host machine 31 participates in cooling through the dual-working-condition heat exchanger 40.
In the daytime cooling mode, the external ice-melting open primary pump system 100 is preset with various working conditions for cooling.
Specifically, based on the magnitude of the cooling load and the current electricity price, a plurality of working conditions are combined; and based on different working conditions, at least one of the ice storage tank 10, the base host 30 and the double-station host 31 is selected to jointly participate in cooling so as to reasonably reduce the running cost.
In this embodiment, in the daytime cooling mode, the external ice-melting open primary pump system 100 is preset with five working conditions for cooling.
In the first working condition, the first switch valve 71, the second switch valve 72, the first regulating valve 61 and the second regulating valve 62 are all opened, the third switch valve 73 is closed, and the ice storage tank 10, the base host 30 and the double working condition host 31 jointly participate in cooling.
In the second working condition, the first switch valve 71, the first regulating valve 61 and the second regulating valve 62 are all opened, the second switch valve 72 and the third switch valve 73 are all closed, and the ice storage tank 10 and the base host 30 jointly participate in cooling.
In the third working condition, the first switch valve 71, the second switch valve 72 and the second regulating valve 62 are all opened, the third switch valve 73 and the first regulating valve 61 are all closed, and the base load host 30 and the double-station host 31 jointly participate in cooling.
In the fourth operating condition, the first and second switching valves 71 and 72 are both closed, the third switching valve 73 is opened, and the first and second regulating valves 61 and 62 are opened, and the ice bank 10 alone participates in cooling.
In the fifth working condition, the first switch valve 71 and the second regulating valve 62 are opened, the second switch valve 72, the third switch valve 73 and the first regulating valve 61 are closed, and the base host 30 alone participates in cooling.
Specifically, the electricity supply rates are divided into peak rates, flat rates, and valley rates in different time periods, and at the valley rates, the system stores ice at night. During daytime cold supply, the ice storage tank 10 is adopted to participate in cold supply as much as possible in the peak electricity price period, and insufficient cold energy is preferably supplemented by the base load host 30 so as to achieve the purpose of saving the running cost.
When the daytime load is in a peak period, or the daytime load is higher and the electricity price is lower, or the daytime load is lower and the electricity price is lower, a first working condition is adopted; when the daytime load is higher and the peak electricity price is higher, or the daytime load is lower and the peak electricity price is lower, adopting a second working condition; when the daytime load is in a peak period and the ice pool is cooled, adopting a third working condition; when the daytime load is in the valley period, adopting a fourth working condition; and when the load in the daytime is higher and the ice pool is cooled down, or when the load in the daytime is lower and the ice pool is cooled down, adopting a fifth working condition. Optionally, the number of the multiple working conditions can be increased or decreased according to actual conditions, for example, three working conditions, six working conditions or eight working conditions are provided.
Based on the external ice-melting open type primary pump system 100, the application also provides a cooling method of the external ice-melting open type primary pump system 100, which ensures that the system does not have the condition of negative pressure operation in the whole cooling season and realizes high-efficiency and safe cooling. Fig. 2 is a schematic flow chart of an embodiment of a cooling method provided in the present application, where the cooling method includes:
step 10: and responding to different preset working conditions, and selecting at least one of the base load host, the double-station host and the ice storage pool to participate in cooling.
The external ice-melting open type primary pump system 100 is divided into a daytime cooling mode and a nighttime cooling mode based on whether the ice bank 10 is ice-storing.
In the night cooling mode, the night ice bank 10 performs cold accumulation, and the base host 30 separately supplies cold. The fifth switching valve 75 is closed, the fourth switching valve 74 is opened, the double-station host 31 and the double-station host circulating pump 21 are operated, and the refrigerating medium enters the ice coil 56 after being cooled by the chiller, so as to store cold in the ice storage tank 10. Because the night cooling load is low, 1 base-load host 30 is usually started to participate in cooling, so that the requirement can be met. In this mode, the first regulating valve 61 is closed, the positive pressure of the system is ensured by the constant pressure device 80, the second regulating valve 62 is normally open, and the base load host 30 regulates the outlet water temperature t3 (t 1) to meet the cooling requirement.
In the daytime cooling mode, the ice bank 10 does not store cold, the fifth switching valve 75 is opened, the fourth switching valve 74 is closed, and at least one of the ice bank 10, the base host 30, and the duplex host 31 participates in cooling based on different conditions.
Specifically, in this embodiment, in the daytime cooling mode, the external ice-melting open primary pump system 100 is preset with five working conditions for cooling, including:
in response to a preset first working condition, the first switch valve 71, the second switch valve 72, the first regulating valve 61 and the second regulating valve 62 are opened, the third switch valve 73 is closed, and the ice bank 10, the base host 30 and the double working condition host 31 jointly participate in cooling.
Specifically, when the ice bank 10, the base host 30 and the double-working condition host 31 are combined for cooling, the third switch valve 73 on the first bypass pipe 51 is closed, and the first switch valve 71 downstream of the base host 30 and the second switch valve 72 downstream of the double-working condition heat exchanger 40 are both opened; according to the cooling requirement, 1 or more base-load hosts 30 and double-station hosts 31 can be selected to participate in cooling, and one or more first switch valves 71 and second switch valves 72 are correspondingly opened, and simultaneously, the same number of double-station host circulating pumps 21 of the double-station hosts 31 participating in cooling are opened. The first regulating valve 61 and the second regulating valve 62 are both opened, wherein the first regulating valve 61 regulates according to the lowest point A of the system pressure, so that the system is ensured not to generate negative pressure; the second regulating valve 62 regulates according to the water outlet temperature t1 of the ice storage tank 10, and ensures that the water outlet temperature meets the cooling requirement.
In response to a preset second working condition, the first switch valve 71, the first regulating valve 61 and the second regulating valve 62 are opened, the second switch valve 72 and the third switch valve 73 are closed, and the ice storage tank 10 and the base host 30 jointly participate in cooling.
Specifically, when the ice storage tank 10 and the base host 30 are combined for cooling, the third switch valve 73 on the first bypass pipe 51 is closed, the second switch valve 72 on the second pipe 54 is closed, the dual-working host 31 is not operated, and the dual-working host circulation pump 21 is not operated. According to the cooling requirement, 1 or more base-load hosts 30 are selected to participate in cooling, and one or more first switch valves 71 are correspondingly opened. The first regulating valve 61 and the second regulating valve 62 are both opened, and the first regulating valve 61 regulates according to the lowest point A of the system pressure, so that the system is ensured not to generate negative pressure; the second regulating valve 62 regulates according to the water outlet temperature t1 of the ice storage tank 10, and ensures that the water outlet temperature meets the cooling requirement.
In response to a preset third operating condition, the first switch valve 71, the second switch valve 72 and the second regulating valve 62 are opened, the third switch valve 73 and the first regulating valve 61 are closed, and the base host 30 and the dual-station host 31 jointly participate in cooling.
Specifically, when the base host 30 and the dual-condition host 31 are combined for cooling, the third switching valve 73 on the first bypass pipe 51 is closed. According to the cooling requirement, 1 or more base-load hosts 30 and double-station hosts 31 are selected to participate in cooling, one or more first switch valves 71 and second switch valves 72 are correspondingly opened, and the same number of double-station host circulating pumps 21 of the double-station hosts 31 participating in cooling are simultaneously opened. The first regulating valve 61 is closed, the positive pressure of the system is ensured through the constant pressure device 80, the second regulating valve 62 is normally opened, and the base load host 30 and the double-station host 31 regulate the water outlet temperature t3 (t 1) so as to meet the cooling requirement.
In response to a preset fourth operating condition, the first and second switching valves 71 and 72 are closed, and the third switching valve 73, the first and second regulating valves 61 and 62 are opened, so that the ice bank 10 alone participates in the cooling.
Specifically, when the ice bank 10 is cooled alone, the first switching valve 71 on the first line 53 is closed, the second switching valve 72 on the second line 54 is closed, the third switching valve 73 on the first bypass line 51 is opened, the base host 30 and the dual-station host 31 are not operated, and the dual-station host circulation pump 21 is not operated. The first regulating valve 61 and the second regulating valve 62 are both opened, and the first regulating valve 61 is regulated according to the lowest point A of the system pressure, so that the system is ensured not to generate negative pressure; the second regulating valve 62 regulates according to the water outlet temperature t1 of the ice bank 10 to ensure that the water outlet temperature meets the cooling demand.
In response to a preset fifth operating condition, the first switching valve 71 and the second regulating valve 62 are opened, and the second switching valve 72, the third switching valve 73 and the first regulating valve 61 are closed, so that the base host 30 alone participates in cooling.
Specifically, when the base host 30 is cooled alone, the third switching valve 73 on the first bypass pipe 51 is closed, the second switching valve 72 on the second pipe 54 is closed, the duplex host 31 is not operated, and the duplex host circulation pump 21 is not operated. According to the cooling requirement, 1 or more base-load hosts 30 are selected to participate in cooling, and one or more first switch valves 71 are correspondingly opened. The first regulating valve 61 is closed, the second regulating valve 62 is normally open, the positive pressure of the system is ensured through the constant pressure device 80, and the base load host 30 regulates the outlet water temperature t3 (t 1) so as to meet the cooling requirement.
Step 20: and selecting a first regulating valve or a constant pressure device to regulate based on whether the ice storage pool participates in cold supply or not so that the lowest point of the system pressure at the downstream of the user side heat exchanger is in positive pressure operation.
When the ice storage tank 10 participates in cold supply, the first regulating valve 61 and the second regulating valve 62 are both opened, and the first regulating valve 61 regulates according to the lowest point A of the system pressure, so that the system is ensured not to generate negative pressure; the second regulating valve 62 regulates according to the water outlet temperature t1 of the ice storage tank 10, and ensures that the water outlet temperature meets the cooling requirement.
When the ice storage tank 10 does not participate in cooling, the first regulating valve 61 is closed, positive pressure of the system is ensured through the constant pressure device 80, the second regulating valve 62 is normally opened, and the upstream cooler is regulated to ensure the water outlet temperature t3 (t 1) so as to meet the cooling requirement.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a storage medium provided in the present application.
The storage medium 200 stores program data 201, which program data 201, when executed by a processor, implements a cooling method as described in fig. 2.
The program data 201 is stored in a storage medium 200 and includes instructions for causing a network device (which may be a router, personal computer, server, etc.) or processor to perform all or part of the steps of the methods described in various embodiments of the present application.
Alternatively, the storage medium 200 may be a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, etc. which may store the program data 201.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of a computer device provided in the present application.
The computer device 300 comprises a processor 320 and a memory 310 connected, the memory 310 storing a computer program which, when executed by the processor 320, implements a cooling method as described in fig. 2.
Further, the external ice-melt open primary pump system 100 also includes a computer device 300 as described above, the computer device 300 being in communication with the first regulator valve 61 on the third conduit 55 and the second regulator valve 62 on the second bypass conduit 52.
Specifically, the computer device 300 is communicatively connected to the above-described on-off valves 71 to 75, the regulating valves 61, 62, the circulation pump 20, the base host 30, the double-station host 31, the double-station host circulation pump 21, and the like, to control the above-described elements to implement the external ice melting and cooling method as described above.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the storage medium embodiments and the electronic device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points.
The subject application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.
In the several embodiments provided in the present application, it should be understood that the disclosed methods and apparatuses may be implemented in other manners. For example, the above-described device embodiments are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist alone physically, or two or more units may be integrated into one unit. The integrated units may be implemented in hardware or in software functional units.
The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the present application.
Claims (8)
1. A method of cooling an external ice-melting open primary pump system, comprising:
responding to different preset working conditions, and selecting at least one of a base load host, a double-station host and an ice storage pool to participate in cooling;
based on whether the ice storage pool participates in cold supply, a first regulating valve or a constant pressure device is selected for regulation, so that the lowest point of the system pressure at the downstream of the user side heat exchanger is in positive pressure operation; the external ice melting open type primary pump system comprises the base load host, a double-working-condition heat exchanger, the double-working-condition host, the ice storage tank, a circulating pump, a user side heat exchanger, a first switching valve, a second switching valve, a third switching valve, a first regulating valve, a second regulating valve, a first bypass pipe, a second bypass pipe and the constant pressure device; comprising the following steps: the first regulating valve and the second regulating valve are opened in response to the ice storage pool participating in cold supply, and the first regulating valve is regulated based on the pressure of the lowest system pressure point, so that the lowest system pressure point is in positive pressure operation; the second regulating valve is used for regulating the flow based on the preset temperature of the liquid to be conveyed; in response to the ice storage pool not participating in cold supply, closing the first regulating valve, opening the second regulating valve, and starting the constant pressure device so that the lowest pressure point of the system is in positive pressure operation;
the base load host, the double-condition heat exchanger and the first bypass pipe which are connected in parallel are sequentially connected in series with the ice storage tank, the second bypass pipe, the circulating pump and the user side heat exchanger which are connected in parallel, and the double-condition host is respectively communicated with the ice coil pipe of the ice storage tank and the double-condition heat exchanger; the base load host, the double-working-condition heat exchanger and the parallel branch corresponding to the first bypass pipe are respectively provided with the first switch valve, the second switch valve and the third switch valve; the parallel branch corresponding to the second bypass pipe of the ice storage tank is provided with the first regulating valve and the second regulating valve respectively; the constant pressure device is connected with the suction inlet of the circulating pump.
2. The method of claim 1, wherein the external ice-melt open primary pump system is divided into a daytime cooling mode and a nighttime cooling mode based on whether the ice storage tank stores ice;
in the daytime cooling mode, the ice storage pool does not store ice, and at least one of the ice storage pool, the base load host and the double-working-condition host is selected to participate in cooling in response to different preset working conditions;
and in the night cooling mode, the ice storage tank stores ice, the first regulating valve is closed, the second regulating valve and the first switch valve are opened, the base-load host is opened to independently cool, and the second switch valve and the third switch valve are closed.
3. The method of claim 2, wherein selecting at least one of the ice bank, the base host, and the dual-station host to participate in cooling in response to different preset operating conditions comprises:
and responding to a preset first working condition, opening the first switch valve, the second switch valve, the first regulating valve and the second regulating valve, and closing the third switch valve, so that the ice storage pool, the base load host and the double-working condition host jointly participate in cooling.
4. The method of claim 3, wherein the selecting at least one of the ice bank, the base host, and the dual-station host to participate in the cooling in response to different preset operating conditions further comprises:
responding to a preset second working condition, opening the first switch valve, the first regulating valve and the second regulating valve, and closing the second switch valve and the third switch valve to enable the ice storage tank and the base load host to jointly participate in cooling;
and responding to a preset third working condition, opening the first switch valve, the second switch valve and the second regulating valve, and closing the third switch valve and the first regulating valve, so that the base load host and the double-station host jointly participate in cooling.
5. The method of claim 4, wherein the selecting at least one of the ice bank, the base host, and the dual-station host to participate in the cooling in response to different preset operating conditions further comprises:
in response to a preset fourth working condition, closing the first switch valve and the second switch valve, and opening the third switch valve, the first regulating valve and the second regulating valve to enable the ice storage pool to independently participate in cooling;
and responding to a preset fifth working condition, opening the first switch valve and the second regulating valve, closing the second switch valve, the third switch valve and the first regulating valve, and independently participating in cooling by the base load host.
6. A storage medium having stored thereon program data, which when executed by a processor, implements the steps of the cooling method according to any of claims 1-5.
7. A computer device comprising a processor and a memory connected to each other, the memory storing a computer program, the processor implementing the steps of the cooling method according to any one of claims 1-5 when executing the computer program.
8. An external ice-melting open type primary pump system, which is characterized by comprising a base-load host, a double-condition heat exchanger, a double-condition host, an ice storage tank, a circulating pump, a user side heat exchanger, a first switch valve, a second switch valve, a third switch valve, a first regulating valve, a second regulating valve, a first bypass pipe, a second bypass pipe, a constant pressure device and the computer equipment according to claim 7;
the base load host, the double-condition heat exchanger and the first bypass pipe which are connected in parallel are sequentially connected in series with the ice storage tank, the second bypass pipe, the circulating pump and the user side heat exchanger which are connected in parallel, and the double-condition host is respectively communicated with the ice coil pipe of the ice storage tank and the double-condition heat exchanger; the base load host, the double-working-condition heat exchanger and the parallel branch corresponding to the first bypass pipe are respectively provided with the first switch valve, the second switch valve and the third switch valve; the parallel branch corresponding to the second bypass pipe of the ice storage tank is provided with the first regulating valve and the second regulating valve respectively; the constant pressure device is connected with the suction inlet of the circulating pump;
the computer device is in communication connection with the first switch valve, the second switch valve, the third switch valve, the first regulating valve, the second regulating valve and the constant pressure device.
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| CN202211366180.6A CN115574392B (en) | 2022-11-02 | 2022-11-02 | External ice-melting open type primary pump system, cooling method, medium and equipment thereof |
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| CN202211366180.6A CN115574392B (en) | 2022-11-02 | 2022-11-02 | External ice-melting open type primary pump system, cooling method, medium and equipment thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3866799B2 (en) * | 1996-08-09 | 2007-01-10 | 三機工業株式会社 | Ice heat storage device |
| JP2005265284A (en) * | 2004-03-18 | 2005-09-29 | Denso Corp | Brine type air-conditioner |
| CN201652653U (en) * | 2010-03-22 | 2010-11-24 | 艾默生网络能源有限公司 | Circulating air-conditioning system of liquid pump |
| CN209706176U (en) * | 2018-12-25 | 2019-11-29 | 天津大学建筑设计研究院 | A kind of open type heating system suitable for intermitting heating |
| CN210441383U (en) * | 2019-08-21 | 2020-05-01 | 上海建筑设计研究院有限公司 | External ice melting cold accumulation refrigerating system |
| CN110848839A (en) * | 2019-11-06 | 2020-02-28 | 珠海新源热力有限公司 | Regional cold supply system and method capable of dynamically accumulating cold |
| CN113739294A (en) * | 2021-08-24 | 2021-12-03 | 杭州源牌科技股份有限公司 | Three-stage series connection internal and external ice melting ultralow temperature cold supply equipment and use method |
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