CN114791163A - Method, apparatus and medium for controlling central air conditioning system - Google Patents
Method, apparatus and medium for controlling central air conditioning system Download PDFInfo
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- CN114791163A CN114791163A CN202210717513.9A CN202210717513A CN114791163A CN 114791163 A CN114791163 A CN 114791163A CN 202210717513 A CN202210717513 A CN 202210717513A CN 114791163 A CN114791163 A CN 114791163A
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- 238000007710 freezing Methods 0.000 claims abstract description 107
- 230000008014 freezing Effects 0.000 claims abstract description 107
- 238000005057 refrigeration Methods 0.000 claims abstract description 14
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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
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
Abstract
Embodiments of the present disclosure relate to methods, apparatuses, and media for controlling a central air conditioning system. According to the method, when any cold water host is started, corresponding configuration parameters are obtained; acquiring information about the number of matched operation refrigerating pumps, the number of matched operation cooling pumps and the number of matched operation cooling towers configured for a cold water host; determining a refrigeration pump, a cooling pump and a cooling tower which are connected with a cold water host machine based on configuration parameters; and determining a freezing pump starting sequence, a cooling pump starting sequence and a cooling tower starting sequence which need to be started in a matched manner with the cold water host machine based on the freezing pump, the cooling pump and the cooling tower which are connected with the cold water host machine and the number of the freezing pumps, the number of the cooling pumps and the number of the cooling towers which are matched with the cold water host machine. Therefore, the control of various different central air-conditioning systems can be realized by using a uniform method under the condition that the number and the connection mode of any air-conditioning equipment included in the central air-conditioning system are not required to be known in advance.
Description
Technical Field
Embodiments of the present disclosure relate generally to the field of air conditioning control, and more particularly, to a method, apparatus, and medium for controlling a central air conditioning system.
Background
A central air conditioning system typically includes air conditioning equipment such as a main chilled water unit, a chiller pump, a cooling tower, and associated electrical valves and piping. The number of air conditioners included in different central air conditioning systems is usually different, and the connection modes between the included air conditioners are also different, so that the topology information of different central air conditioning systems is usually different from each other. However, the control of the central air conditioning system is very dependent on these topological information. At present, a control device such as a Programmable Logic Controller (PLC) is usually used to write a specially customized control program for each central air-conditioning system according to topology information of each central air-conditioning control system, which results in higher development cost of the central air-conditioning system, difficult debugging process, and further longer lead time.
Disclosure of Invention
In view of the above problems, the present disclosure provides a method, an apparatus, and a medium for controlling a central air conditioning system, which can automatically determine corresponding topology information (i.e., automatically determine which of a freezing pump, a cooling pump, and a cooling tower connected to a cold water host) based on corresponding configuration parameters of the cold water host, and control the central air conditioning system based on the topology information, so that various different central air conditioning systems can be controlled using the unified method without knowing in advance the number and connection manner of any air conditioning devices included in the central air conditioning system, and without writing a special control program for the different central air conditioning systems, thereby reducing development cost and debugging difficulty, and shortening a lead time.
According to a first aspect of the present disclosure, there is provided a method for controlling a central air conditioning system including a plurality of cold water hosts, a plurality of chilling pumps, a plurality of cooling pumps, and a plurality of cooling towers, the method comprising: when any one of the cold water hosts is started, acquiring corresponding configuration parameters; acquiring information about the number of matched operation refrigerating pumps, the number of matched operation cooling pumps and the number of matched operation cooling towers which are configured for the cold water main machine; determining a refrigeration pump, a cooling pump and a cooling tower which are connected with the cold water host machine based on the configuration parameters; and determining a freezing pump starting sequence, a cooling pump starting sequence and a cooling tower starting sequence which need to be started in a matched manner with the cold water host machine based on the freezing pump, the cooling pump and the cooling tower which are connected with the cold water host machine and the number of matched operation freezing pumps, the number of matched operation cooling pumps and the number of matched operation cooling towers of the cold water host machine so as to control the starting of the freezing pump, the cooling pump and the cooling tower in the freezing pump starting sequence, the cooling pump starting sequence and the cooling tower starting sequence.
According to a second aspect of the present disclosure, there is provided a computing device comprising: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect of the disclosure.
In a third aspect of the present disclosure, a non-transitory computer readable storage medium is provided having stored thereon computer instructions for causing a computer to perform the method of the first aspect of the present disclosure.
In some embodiments, the configuration parameters include a chilled side rated flow and a chilled side rated flow of the chilled water main, a rated flow of each of the plurality of chilled pumps, and a rated flow of each of the plurality of cooling pumps.
In some embodiments, the configuration parameters include a rated cooling capacity, a rated inlet and outlet water temperature difference, and a rated power of the chilled water main, a rated flow rate of each of the plurality of chilling pumps, and a rated flow rate of each of the plurality of cooling pumps, and the method further comprises: and determining the rated flow of the freezing side and the rated flow of the cooling side of the cold water main machine based on the rated refrigerating capacity, the rated temperature difference and the rated power of the cold water main machine and the density and the specific heat capacity of the cooling water generated by the cold water main machine.
In some embodiments, determining the chiller pumps, the cooling pumps and the cooling towers connected to the cold water main machine comprises determining a serial number of the chiller pumps connected to the cold water main machine, a serial number of the cooling pumps connected to the cold water main machine, a serial number of the cooling towers connected to the cold water main machine and a number of the cooling towers connected to the cold water main machine.
In some embodiments, determining the chiller pump, the cooling pump, and the cooling tower connected to the cold water host based on the configuration parameters comprises: determining a freezing pump connected with the cold water main machine based on the freezing side rated flow of the cold water main machine and the rated flow of each freezing pump; and determining the cooling pump connected with the cold water main machine based on the cooling side rated flow of the cold water main machine and the rated flow of each cooling pump.
In some embodiments, determining the freeze pumps connected to the cold water main based on the chilled side rated flow of the cold water main and the rated flow of each freeze pump comprises: if the connection relationship between the cold water main machine and the freezing pumps is configured to be connected in parallel, determining one or more freezing pumps of the plurality of freezing pumps, of which the ratio of rated flow to rated flow of the freezing side of the cold water main machine is larger than a first ratio and smaller than a second ratio, as the freezing pumps connected with the cold water main machine, so as to add the serial numbers of the one or more freezing pumps into a serial number list of the freezing pumps connected in parallel with the cold water main machine; and if the connection relation between the cold water main machine and the freezing pump is configured to be connected in series, determining that the freezing pump corresponding to the cold water main machine in the plurality of cooling pumps is the freezing pump connected with the cold water main machine, so as to add the serial number of the freezing pump into a serial number list of the freezing pumps connected in series with the cold water main machine.
In some embodiments, determining the cooling pump connected to the cold water main based on the cooling side rated flow of the cold water main and the rated flow of each cooling pump comprises: if the connection relationship of the cold water main machine and the cooling pumps is configured to be connected in parallel, determining one or more cooling pumps of the plurality of cooling pumps, of which the ratio of the rated flow to the cooling side rated flow of the cold water main machine is larger than the first ratio and smaller than the second ratio, as the cooling pumps connected to the cold water main machine so as to add the serial numbers of the one or more cooling pumps to a serial number list of the cooling pumps connected in parallel with the cold water main machine; and if the connection relationship between the cold water main machine and the cooling pump is configured to be connected in series, determining that the cooling pump corresponding to the cold water main machine in the plurality of cooling pumps is the cooling pump connected with the cold water main machine, so as to add the serial number of the cooling pump into a serial number list of the cooling pumps connected in series with the cold water main machine.
In some embodiments, determining that a chilling pump startup sequence associated with the chilled water host is required comprises: determining a number of currently available ones of the chilled pumps connected to the chilled water main; if the determined number of available freezing pumps is greater than or equal to the determined number of working-in-coordination freezing pumps for the cold water main engine, determining a freezing pump startup sequence of the cold water main engine based on a plurality of freezing pumps with the highest priority ranking in the determined available freezing pumps, wherein the number of freezing pumps included in the determined freezing pump startup sequence is equal to the number of working-in-coordination freezing pumps; if the determined number is less than the determined number of matched service freeze pumps for the cold water host, an anomaly is indicated.
In some embodiments, determining a cooling pump startup sequence that requires a startup associated with the cold water host comprises: determining a number of currently available cooling pumps of the cooling pumps connected to the cold water main; determining a cooling pump turn-on sequence for the cold water host based on a plurality of the determined available cooling pumps that are top ranked in priority if the determined number of available cooling pumps is greater than or equal to the determined number of co-operating cooling pumps for the cold water host, wherein the number of cooling pumps included in the determined cooling pump turn-on sequence is equal to the number of co-operating cooling pumps; if the determined number is less than the determined number of matched service cooling pumps for the cold water host, an anomaly is indicated.
In some embodiments, determining a cooling tower startup sequence that requires a startup associated with the cold water host comprises: determining a number of available cooling towers currently available in the cooling towers connected to the cold water main; determining a cooling tower startup sequence for the cold water host based on a number of cooling towers with a highest priority ranking among the determined available cooling towers if the determined number of available cooling tower pumps is greater than or equal to the determined number of working-in-flight cooling towers for the cold water host, wherein the number of cooling towers included in the determined cooling tower startup sequence is equal to the number of working-in-flight cooling towers; determining the number of currently started cooling tower and the number of currently started cooling towers in the central air conditioning system if the determined number of available cooling tower pumps is less than the determined number of cooling tower for the matched operation determined for the cooling water host; determining the number of cooling towers to be started based on the minimum number of started cooling towers of each started cold water main machine; determining a cooling tower startup sequence of the cold water main unit based on the determined available cooling tower pumps if the sum of the number of cooling towers to be started and the number of cooling towers for supporting operation is less than or equal to the sum of the determined available cooling tower pumps and the number of cooling towers which are started currently; and if the sum of the number of cooling towers to be started and the number of cooling towers for matched operation is larger than the sum of the determined available number of cooling tower pumps and the number of the cooling towers which are started currently, indicating that an abnormity exists.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference numbers indicate like or similar elements.
Fig. 1 shows a schematic diagram of a system 100 for implementing a method for controlling a central air conditioning system according to an embodiment of the invention.
Fig. 2A shows a system architecture diagram of an exemplary central air conditioning system, in accordance with an embodiment of the present disclosure.
Fig. 2B illustrates a system architecture diagram of yet another exemplary central air conditioning system, in accordance with an embodiment of the present disclosure.
Fig. 2C illustrates a system architecture diagram of yet another example central air conditioning system, according to an embodiment of the present disclosure.
Fig. 3 shows a flowchart of a method 300 for controlling a central air conditioning system according to an embodiment of the present disclosure.
Fig. 4 shows a flow diagram of a method 400 for determining a cryopump connected to a chilled water host in accordance with an embodiment of the disclosure.
Fig. 5 shows a flow diagram of a method 500 for determining a cooling pump connected to a cold water host, according to an embodiment of the present disclosure.
Fig. 6 illustrates a block diagram of an electronic device 600 in accordance with an embodiment of the disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of embodiments of the present disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The term "including" and variations thereof as used herein is intended to be open-ended, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.
As described above, the number of air conditioners included in different central air conditioning systems is generally different, and the connection modes between the included air conditioners are also different, so that the topology information of different central air conditioning systems is generally different from each other. However, the control of the central air conditioning system is very dependent on these topological information. At present, a control device such as a Programmable Logic Controller (PLC) is usually used to write a specially customized control program for each central air conditioning system according to topology information of each central air conditioning control system, which results in higher development cost of the central air conditioning system, difficult debugging process, and further longer lead time.
To address at least in part one or more of the above problems and other potential problems, an example embodiment of the present disclosure proposes a method for controlling a central air conditioning system including a plurality of cold water hosts, a plurality of refrigeration pumps, a plurality of cooling pumps, and a plurality of cooling towers, the method including: when any cold water host in the plurality of cold water hosts is started, acquiring corresponding configuration parameters; acquiring information about the number of matched operation refrigerating pumps, the number of matched operation cooling pumps and the number of matched operation cooling towers which are configured for the cold water main machine; determining a refrigeration pump, a cooling pump and a cooling tower connected with the cold water main machine based on the configuration parameters; and determining a freezing pump starting sequence, a cooling pump starting sequence and a cooling tower starting sequence which need to be started in a matched manner with the cold water host machine based on the freezing pump, the cooling pump and the cooling tower which are connected with the cold water host machine and the number of matched operation freezing pumps, the number of matched operation cooling pumps and the number of matched operation cooling towers of the cold water host machine so as to control the starting of the freezing pump, the cooling pump and the cooling tower in the freezing pump starting sequence, the cooling pump starting sequence and the cooling tower starting sequence. In this way, the control of various different central air-conditioning systems can be realized by using a unified method without knowing the number and the connection mode of any air-conditioning equipment included in the central air-conditioning system in advance, and a special control program does not need to be written for the different central air-conditioning systems, so that the development cost and the debugging difficulty are reduced, and the delivery cycle is shortened.
Fig. 1 shows a schematic diagram of a system 100 for implementing a method for controlling a central air conditioning system according to an embodiment of the invention. As shown in fig. 1, system 100 includes an air conditioning control unit 110 and a central air conditioning system 120. The ac control device 110 may perform data interaction with the central air conditioning system 120 to implement control of each air conditioner in the central air conditioning system 120. In the present disclosure, the control of the air conditioning devices by the air conditioning control apparatus 110 includes control of the startup aspect of these air conditioning devices. The climate control device 110 may be coupled to the central air conditioning system 120 (e.g., wired or wirelessly connected to each air conditioning unit in the central air conditioning system) or may be part of the central air conditioning system 120. The climate control device 110 may be implemented via a microcontroller such as a PLC, or may be implemented by an electronic device such as a desktop computer, a laptop computer, an industrial control computer, an embedded control device, and the specific structure thereof may be described below with reference to fig. 6, for example. The climate control device 110 may include one or more processors 1101 and one or more memories 1102 coupled to the one or more processors 1101, the memory 1102 having stored therein instructions executable by the one or more processors 1101 that, when executed by the at least one processor 1101, perform the method 300 as described below.
The central air conditioning system 120 includes a plurality of air conditioning devices (i.e., a cold water main, a freezing pump, a cooling tower, etc.), each of which is provided in a plurality. Specifically, the central air conditioning system 120 may include a plurality of cold water hosts 1201 (also referred to as hosts hereinafter), a plurality of freeze pumps 1202, a plurality of cooling pumps 1203, and a plurality of cooling towers 1204. Each cold water main unit 1201 mainly comprises a condenser and an evaporator, and the working principle of the cold water main unit is that the evaporator is used for enabling water to exchange heat with a refrigerant, a refrigerant system absorbs heat load in the water to enable the water to be cooled to generate cold water, heat is brought to the condenser through the action of a compressor, the refrigerant exchanges heat with the water, and the water absorbs the heat and then brings the heat out of an external cooling tower through a water pipe to dissipate. The method of the present disclosure is mainly applicable to the central air conditioning system 120 adopting the following connection modes: that is, each of the cold water hosts 1201 in the central air conditioning system 120 is connected in series or in parallel with one or more respective chiller pumps 1202 included, in series or in parallel with one or more respective cooling pumps 1203 included, and in parallel with all of the cooling towers 1204 included.
2A-2C illustrate non-limiting examples of central air conditioning systems according to embodiments of the present disclosure. In the example shown in fig. 2A, the central air conditioning system includes two cold water hosts (i.e., cold water host No. 1 and cold water host No. 2 as shown in fig. 2A), three chiller pumps, three cooling pumps, and three cooling towers, wherein the hosts and the chiller pumps, the cooling pumps, and the cooling towers are all connected in parallel.
In fig. 2B, the central air conditioning system includes two main cooling water units (i.e., cooling water unit No. 1 and cooling water unit No. 2 as shown in fig. 2B), two freezing pumps, two cooling pumps, and three cooling towers, wherein the main units are connected in series with the freezing pumps and the cooling pumps, and in parallel with the cooling towers.
In fig. 2C, the central air conditioning system includes two main cooling water units (i.e., the main cooling water unit No. 1 and the main cooling water unit No. 2 as shown in fig. 2C), two freezing pumps, three cooling pumps and three cooling towers, wherein the main cooling water unit and the freezing pumps are connected in series, and the main cooling water unit and the cooling towers are connected in parallel.
It is noted that fig. 2A-2C are examples only, and that in actual use, the central air conditioning system may include more or fewer hosts, chiller pumps, cooling pumps, and cooling towers, and that other connections may be used while remaining within the scope of the present disclosure.
Fig. 3 shows a flowchart of a method 300 for controlling a central air conditioning system according to an embodiment of the present disclosure. Method 300 may be performed by climate control device 110 as shown in FIG. 1, or may be performed at electronic device 600 as shown in FIG. 6. It should be understood that method 300 may also include additional blocks not shown and/or may omit blocks shown, as the scope of the disclosure is not limited in this respect.
In step 302, when any one of the plurality of cold water hosts included in the central air conditioning system is powered on, corresponding configuration parameters are obtained.
In some embodiments, the obtained configuration parameters include a chilled side rated flow and a chilled side rated flow for the respective cold water host (i.e., the on-board cold water host), a rated flow for each of a plurality of chilled pumps included in the central air conditioning system, and a rated flow for each of a plurality of cooling pumps included in the central air conditioning system. These configuration parameters are entered into the corresponding climate control device 110 by the relevant operator or user at the time of initialization of the central air conditioning system.
In some embodiments, the configuration parameters obtained include a rated cooling capacity, a rated inlet-outlet water temperature difference, and a rated power of the corresponding cold water host (i.e., the powered-on cold water host), a rated flow rate of each of the plurality of freeze pumps, and a rated flow rate of each of the plurality of cooling pumps. These configuration parameters are entered into the corresponding climate control device 110 by the relevant operator or user at the time of initialization of the central air conditioning system. In these embodiments, in order to facilitate the later determination of the refrigerating pump, the cooling pump and the cooling tower connected to the cold water main machine, it is also necessary to determine the freezing side rated flow rate and the cooling side rated flow rate of the cold water main machine based on the rated refrigerating capacity, the rated inlet and outlet water temperature difference and the rated power of the cold water main machine and the density and specific heat capacity of the cooling water generated by the cold water main machine. In the present disclosure, the freezing side rated flow and the cooling side rated flow of the cold water main can be determined by the following two equations, respectively: that is, the freezing side rated flow rate = rated cooling capacity/specific heat capacity/density/rated temperature difference of inlet and outlet water, and the cooling side rated flow rate = (rated cooling capacity + rated power)/specific heat capacity/density/rated temperature difference of inlet and outlet water.
At step 304, information configured for the chiller host is obtained regarding the number of makeup chiller pumps, the number of makeup cooling pumps, and the number of makeup cooling towers.
In this disclosure, when the central air conditioning system is initialized, the number of the refrigeration pumps for the matching operation, the number of the cooling pumps for the matching operation, and the number of the cooling towers for the matching operation of each cold water host included in the central air conditioning system are configured in advance, that is, the number of the refrigeration pumps, the cooling pumps, and the cooling towers which need to be started when each cold water host is started is configured in advance. For example only, the number of the working refrigeration pumps of a certain cold water main machine can be configured to be two, for example, so that a one-machine two-pump working mode is formed between the cold water main machine and the refrigeration pumps; the number of the cooling pumps matched with the cold water main machine for operation can be configured to be one, so that a one-machine one-pump operation mode is formed between the cold water main machine and the cooling pumps; the number of the cooling towers for matching operation of the cold water main machine can be three, so that a one-machine-three-tower operation mode is formed between the cold water main machine and the cooling towers.
In the present disclosure, these preconfigured information regarding the number of service chillers, the number of service cooling pumps, and the number of service cooling towers may be obtained when performing the corresponding control.
At step 306, based on configuration parameters, a chilling pump, a cooling pump, and a cooling tower connected to the chilled water host are determined.
In the present disclosure, topology information related to the cold water host may be determined based on the acquired configuration parameters. In the central air-conditioning system, each cold water main machine, the refrigerating pump, the cooling pump and the cooling tower are preset with corresponding serial numbers so as to distinguish the cold water main machine, the refrigerating pump, the cooling pump and the cooling tower from other cold water main machines. Therefore, determining the refrigeration pumps, the cooling pumps and the cooling towers connected with the cold water main machine refers to determining which refrigeration pumps, cooling pumps and cooling towers are connected with the cold water main machine, and comprises determining the serial number of the refrigeration pumps connected with the cold water main machine, the serial number of the cooling pumps connected with the cold water main machine, the serial number of the cooling towers connected with the cold water main machine and the number of the cooling towers connected with the cold water main machine.
In an application scenario where a cold water main in a central air conditioning system is set to be connected in parallel with all cooling towers included, in the step of determining a refrigerating pump, a cooling pump and a cooling tower connected with the cold water main, it may not be necessary to specifically determine topology information on the cooling tower connected with the cold water main. Thus, in some embodiments, determining a chilled pump, a cooling pump, and a cooling tower connected to a chilled water main based on configuration parameters may include: the method comprises the steps of determining freezing pumps connected with the cold water main machine based on the freezing side rated flow of the cold water main machine and the rated flow of each freezing pump, and determining cooling pumps connected with the cold water main machine based on the cooling side rated flow of the cold water main machine and the rated flow of each cooling pump. The methods for determining the freeze pump and the cooling pump connected to the chilled water main will be described in further detail below in conjunction with fig. 4 and 5, respectively.
In step 308, a freezing pump startup sequence, a cooling pump startup sequence and a cooling tower startup sequence which need to be started up in a matching manner with the cold water host are determined based on the number of freezing pumps, cooling pumps and cooling towers connected with the cold water host and the number of matching operation freezing pumps, the number of matching operation cooling pumps and the number of matching operation cooling towers of the cold water host, so as to control the freezing pumps, the cooling pumps and the cooling towers in the freezing pump startup sequence, the cooling pump startup sequence and the cooling tower startup sequence to be started up.
In this disclosure, step 308 may specifically include: determining a freezing pump starting sequence needing to be started in a matched mode with the cold water host based on freezing pumps connected with the cold water host and the number of the freezing pumps in matched operation of the cold water host, wherein the freezing pump starting sequence refers to a sequence consisting of the freezing pumps needing to be started in a matched mode with the cold water host; determining a cooling pump starting sequence needing to be started in a matched mode with a cold water host machine based on cooling pumps connected with the cold water host machine and the number of cooling pumps in matched operation of the cold water host machine, wherein the cooling pump starting sequence refers to a sequence consisting of the cooling pumps needing to be started in a matched mode with the cold water host machine; and determining a cooling tower pump starting sequence required to be started in cooperation with the cold water main machine based on the cooling towers connected with the cold water main machine and the number of cooling towers in cooperation with the cold water main machine, wherein the cooling tower starting sequence refers to a sequence consisting of the cooling towers required to be started in cooperation with the cold water main machine.
In some embodiments, a method of determining a freeze pump startup sequence requiring startup in conjunction with a cold water host may include the following steps. First, the number of currently available ones of the freeze pumps connected to the cold water main is determined. For example, if a certain cryopump is currently used (e.g., it is currently being used by other cold water hosts) or has failed, that cryopump is not currently available and therefore cannot be selected to boot up with that cold water host even though it is connected to that cold water host. Then, if the determined number of available freeze pumps is greater than or equal to the determined number of working-in-flight freeze pumps for the cold water host, a freeze pump turn-on sequence for the cold water host is determined based on a plurality of the determined available freeze pumps with the highest priority ranking, wherein the number of freeze pumps included in the determined freeze pump turn-on sequence is equal to the determined number of working-in-flight freeze pumps for the cold water host. For example, if the number of available cryopumps connected to the cold water host is 4 and the number of working-in-flight cryopumps determined for the cold water host is 2, it may be determined that two of the available cryopumps connected to the cold water host that rank 2 top in priority form a corresponding cryopump power-on sequence. In the present disclosure, the remaining available ones of the available cryopumps connected to the chilled water main may be flagged as backup cryopumps so that if a certain cryopump fails or otherwise becomes unavailable in a cryopump power-up sequence, one of the backup cryopumps may be selected to replace the unavailable cryopump. However, if the determined number is less than the number of service chilled pumps determined for the cold water main, an anomaly is indicated. For example, the unavailability of a freezing pump of the cold water main machine may be recorded in a log, and the log may be output to play a role of prompting a user.
In some embodiments, a method of determining a cooling pump startup sequence that requires startup in conjunction with the cold water host may include the following steps. First, the number of currently available cooling pumps in the cooling pumps connected to the cold water main is determined. For example, if a cooling pump is currently used (e.g., the cooling pump is currently being used by other cold water hosts) or has failed, the cooling pump is not currently available and therefore cannot be selected for startup with the cold water host even though it is connected to the cold water host. Then, if the determined number of available cooling pumps is greater than or equal to the determined number of cooling pumps for the primary chiller, determining a cooling pump turn-on sequence for the primary chiller based on a plurality of cooling pumps with the highest priority ranking among the determined available cooling pumps, wherein the number of cooling pumps included in the determined cooling pump turn-on sequence is equal to the determined number of cooling pumps for the primary chiller. For example, if the number of available cooling pumps connected to the cold water master is 4 and the number of working-set cooling pumps determined for the cold water master is 2, it may be determined that two cooling pumps of the available cooling pumps connected to the cold water master, which are the top 2 bits of priority, constitute a corresponding cooling pump turn-on sequence. In the present disclosure, the remaining available cooling pumps of the available cooling pumps connected to the cold water main may be flagged as backup cooling pumps so that when a cooling pump in a cooling pump startup sequence fails or otherwise becomes unavailable, one of the backup cooling pumps may be selected to replace the unavailable cooling pump. However, if the determined number is less than the determined number of working-in-flight cooling pumps for the cold water host, then an indication is made that an anomaly exists. For example, the unavailability of the cooling pump of the cold water main unit may be recorded in a log and the log may be output to serve as a prompt to the user.
In some embodiments, determining a cooling tower startup sequence that requires a startup associated with the cold water host comprises: first, the number of available cooling towers currently available in the cooling towers connected to the cold water main is determined. For example, if a cooling tower is currently in use (e.g., the cooling tower is currently in use by other cold water hosts) or has failed, the cooling tower is not currently available and therefore cannot be selected for startup with the cold water host even though it is connected to the cold water host. Then, if the determined number of available cooling towers is greater than or equal to the determined number of cooling towers for supporting operation of the cold water master, determining a cooling tower startup sequence of the cold water master based on a plurality of cooling towers with the highest priority ranking in the determined available cooling towers, wherein the determined number of cooling towers included in the cooling tower startup sequence is equal to the number of cooling towers for supporting operation. For example, if the number of available cooling towers connected to the cold water master is 4 and the number of cooperating cooling towers determined for the cold water master is 2, it may be determined that the two cooling towers with the top 2 priority ranking among the available cooling pumps connected to the cold water master constitute a corresponding cooling tower startup sequence. In the present disclosure, the remaining available cooling pumps in the available cooling towers connected to the cold water main may be flagged as backup cooling tower pumps so that when a cooling tower in a cooling tower startup sequence fails or otherwise becomes unavailable, one of the backup cooling towers may be selected to replace the unavailable cooling tower. However, if the determined number of available cooling tower pumps is less than the determined number of working-in-place cooling towers for the cold water hosts, the number of cold water hosts currently powered on and the number of cooling towers currently powered on in the central air conditioning system are determined. After the number of the cold water hosts which are started currently and the number of the cooling towers which are started currently are determined, the number of the cooling towers which should be started is determined based on the minimum starting cooling tower number of each started cold water host. And if the sum of the number of cooling towers which should be started and the number of cooling towers for matched work determined for the cold water main engine is less than or equal to the sum of the determined number of available cooling tower pumps and the number of cooling towers which are started currently, determining a cooling tower starting sequence of the cold water main engine based on the determined available cooling tower pumps. However, if the sum of the number of cooling towers that should be turned on and the number of working-in-place cooling towers determined for the cold water main is greater than the determined sum of the number of available cooling tower pumps and the number of cooling towers that are currently on, an anomaly is indicated. For example, the unavailability of the cooling tower of the cold water main machine may be recorded in a log, and the log may be output to play a role of prompting the user.
Fig. 4 shows a flow diagram of a method 400 for determining a freeze pump connected to a cold water host, according to an embodiment of the present disclosure. The method 400 may be performed by the climate control device 110 as shown in fig. 1, or may be performed at the electronic device 600 shown in fig. 6. It should be understood that method 400 may also include additional blocks not shown and/or may omit blocks shown, as the scope of the disclosure is not limited in this respect.
At step 402, it is determined whether the connection of the chilled water main and the freeze pump are configured to be connected in parallel.
In each central air-conditioning system, information about whether the connection relationship of the cold water main unit and the freezing pumps is parallel connection or series connection can be obtained in advance, and therefore each freezing pump connected in parallel with the cold water main unit in the central air-conditioning system can be determined based on the information and the freezing-side rated flow rate of the cold water main unit and the rated flow rate of each freezing pump in the present disclosure.
In step 404, if it is determined that the connection relationship between the cold water main unit and the freezing pumps is configured to be connected in parallel, one or more freezing pumps of the plurality of freezing pumps, which have a ratio of a rated flow to a freezing side rated flow of the cold water main unit larger than a first ratio and smaller than a second ratio, are determined to be the freezing pumps connected to the cold water main unit, so as to add the serial numbers of the one or more freezing pumps to the serial number list of the freezing pumps connected in parallel with the cold water main unit.
Since the rated flow rates of the cooling sides of different cold water main machines in the central air conditioning system are different and the rated flow rates of different freezing pumps are also different, only the cold water main machine and the freezing pump with the matched two flow rates can be connected with each other for matched use, and therefore, the freezing pump connected with the cold water main machine can be determined based on the ratio of the two flow rates in step 404.
In this way, in the present disclosure, the refrigeration pump connected to the cold water main unit may be automatically determined based on the configuration parameters, so that the control of the corresponding air conditioning equipment in the central air conditioner may be realized without knowing topology information about the cold water main unit and the refrigeration pump in advance, and thus, the control program suitable for various central air conditioning systems may be developed without specially customizing the control program.
In the present disclosure, the first ratio may be, for example, 1, and the second ratio may be, for example, 1.3, although other ratios may be selected for the first ratio and the second ratio in practical use scenarios.
In step 406, if it is determined that the connection relationship between the cold water main unit and the freezing pump is not configured to be connected in parallel (i.e., configured to be connected in series), it is determined that the freezing pump corresponding to the cold water main unit is the freezing pump connected to the cold water main unit, so as to add the serial number of the freezing pump to the serial number list of the freezing pumps connected in series with the cold water main unit.
In a central air conditioning system, the refrigerant pump corresponding to the cold water main unit is generally the same as the refrigerant pump having the same serial number as the cold water main unit, for example, the refrigerant pump corresponding to the cold water main unit No. 1 is the refrigerant pump No. 1, the refrigerant pump corresponding to the cold water main unit No. 2 is the refrigerant pump No. 2, and so on.
By adopting the means, the method and the device can automatically determine the topological information between the cold water main machine and the refrigerating pump (namely automatically determine the refrigerating pump connected with the cold water main machine), and control the starting of the refrigerating pump in the central air-conditioning system based on the topological information, without knowing the number and the connection mode of any air-conditioning equipment included in the corresponding central air-conditioning system in advance.
Fig. 5 shows a flow diagram of a method 500 for determining a cooling pump connected to a cold water host, according to an embodiment of the present disclosure. Method 500 may be performed by climate control device 110 as shown in FIG. 1, or may be performed at electronic device 600 as shown in FIG. 6. It should be understood that method 500 may also include additional blocks not shown and/or may omit blocks shown, as the scope of the disclosure is not limited in this respect.
At step 502, it is determined whether the connection of the cold water host to the cooling pump is configured as a parallel connection.
In each central air conditioning system, information about whether the connection relationship of the cold water main unit and the cooling pumps is the parallel connection or the series connection may be acquired in advance, and thus each cooling pump connected in parallel with the cold water main unit in the central air conditioning system may be determined based on the information and the rated flow rate of the cooling side of the cold water main unit and the rated flow rate of each cooling pump in the present disclosure.
In step 504, if it is determined that the connection relationship of the cold water main unit and the cooling pumps is configured to be connected in parallel, it is determined that one or more cooling pumps, of which the ratio of the rated flow rate to the cooling side rated flow rate of the cold water main unit is greater than a first ratio and less than a second ratio among the plurality of cooling pumps included in the central air conditioner, are the cooling pumps connected to the cold water main unit, so that the serial numbers of the one or more cooling pumps are added to the list of serial numbers of the cooling pumps connected in parallel to the cold water main unit.
Since the rated flow rates of the cooling sides of different cold water main units in the central air conditioning system are different and the rated flow rates of different cooling pumps are also different, only the cold water main units and the cooling pumps with matching two flow rates can be connected with each other for matching use, and therefore, the cooling pump connected with the cold water main unit can be determined based on the ratio of the two flow rates in step 504.
In this way, in the present disclosure, the cooling pump connected to the cold water main unit may be automatically determined based on the configuration parameters, so that it is possible to implement control of the corresponding air conditioning device in the central air conditioner without knowing topology information about the cold water main unit and the cooling pump in advance, and thus it is possible to develop a control program suitable for various central air conditioning systems without specially customizing the control program.
Similar to the method 400 of identifying a cryopump connected to a chilled water main, the first ratio may also be, for example, 1 and the second ratio may also be, for example, 1.3 in this method 500, although other ratios may be selected for the first ratio and the second ratio for practical use scenarios.
In step 506, if it is determined that the connection relationship between the cold water main unit and the cooling pump is configured to be connected in series, it is determined that the cooling pump corresponding to the cold water main unit among the plurality of cooling pumps is the freezing pump connected to the cold water main unit, so that the serial number of the cooling pump is added to the serial number list of the cooling pumps connected in series with the cold water main unit.
In a central air conditioning system, a cooling pump corresponding to a cold water main unit is generally a cooling pump having the same serial number as the cold water main unit, for example, a cooling pump corresponding to No. 1 cold water main unit is a No. 1 cooling pump, a cooling pump corresponding to No. 2 cold water main unit is a No. 2 cooling pump, and so on.
By adopting the above means, the present disclosure can automatically determine the topology information between the cold water main unit and the cooling pump (i.e. automatically determine the cooling pump connected with the cold water main unit), and control the start of the cooling pump in the central air conditioning system based on the topology information without knowing the number and the connection mode of any air conditioning equipment included in the corresponding central air conditioning system in advance.
FIG. 6 illustrates a schematic block diagram of an example electronic device 600 that can be used to implement embodiments of the present disclosure. For example, the climate control device 110 shown in fig. 1 may be implemented by the electronic apparatus 600. As shown, electronic device 600 includes a Central Processing Unit (CPU) 601 that can perform various appropriate actions and processes in accordance with computer program instructions stored in a Read Only Memory (ROM) 602 or loaded from a storage unit 608 into a Random Access Memory (RAM) 603. In the random access memory 603, various programs and data required for the operation of the electronic apparatus 600 can also be stored. The central processing unit 601, the read only memory 602, and the random access memory 603 are connected to each other via a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
A number of components in the electronic device 600 are connected to the input/output interface 605, including: an input unit 606 such as a keyboard, a mouse, a microphone, and the like; an output unit 607 such as various types of displays, speakers, and the like; a storage unit 608, such as a magnetic disk, optical disk, or the like; and a communication unit 609 such as a network card, modem, wireless communication transceiver, etc. The communication unit 609 allows the device 600 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The various processes and processes described above, such as methods 300, 400, and 500, may be performed by central processing unit 601. For example, in some embodiments, methods 300, 400, and 500 may be implemented as a computer software program tangibly embodied in a machine-readable medium, such as storage unit 608. In some embodiments, part or all of a computer program may be loaded and/or installed onto device 600 via read only memory 602 and/or communications unit 609. When the computer program is loaded into the random access memory 603 and executed by the central processing unit 601, one or more of the actions of the methods 300, 400 and 500 described above may be performed.
The present disclosure relates to methods, apparatuses, systems, electronic devices, computer-readable storage media and/or computer program products. The computer program product may include computer-readable program instructions for performing various aspects of the present disclosure.
The computer-readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as punch cards or in-groove raised structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge computing devices. The network adapter card or network interface in each computing/processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the disclosure are implemented by personalizing an electronic circuit, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA), with state information of computer-readable program instructions, which can execute the computer-readable program instructions.
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer readable program instructions may also be stored in a computer readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (12)
1. A method for controlling a central air conditioning system including a plurality of chilled water hosts, a plurality of chilled pumps, a plurality of cooling pumps, and a plurality of cooling towers, the method comprising:
when any one of the cold water hosts is started, acquiring corresponding configuration parameters;
acquiring information about the number of matched operation refrigerating pumps, the number of matched operation cooling pumps and the number of matched operation cooling towers which are configured for the cold water main machine;
determining a refrigeration pump, a cooling pump and a cooling tower which are connected with the cold water host machine based on the configuration parameters; and
and determining a freezing pump starting sequence, a cooling pump starting sequence and a cooling tower starting sequence which need to be started in a matched manner with the cold water host machine based on the freezing pumps, the cooling pumps and the cooling towers which are connected with the cold water host machine and the number of the freezing pumps, the number of the cooling pumps and the number of the cooling towers which are operated in a matched manner with the cold water host machine so as to control the starting of the freezing pumps, the cooling pumps and the cooling towers in the freezing pump starting sequence, the cooling pump starting sequence and the cooling tower starting sequence.
2. The method of claim 1, wherein the configuration parameters include a chilled side rated flow and a chilled side rated flow of the chilled water main, a rated flow of each chilled pump of the plurality of chilled pumps, and a rated flow of each chilled pump of the plurality of chilled pumps.
3. The method of claim 1, wherein the configuration parameters include a rated capacity, a rated inlet-outlet water temperature difference, and a rated power of the chilled water host, a rated flow rate of each of the plurality of chilled pumps, and a rated flow rate of each of the plurality of cooling pumps, and the method further comprises:
and determining the rated flow of the freezing side and the rated flow of the cooling side of the cold water main machine based on the rated refrigerating capacity, the rated temperature difference and the rated power of the cold water main machine and the density and the specific heat capacity of the cooling water generated by the cold water main machine.
4. The method of claim 1, wherein determining the cryopumps, cooling pumps, and cooling towers connected to the cold water host comprises determining a number of cryopumps connected to the cold water host, a number of cooling pumps connected to the cold water host, a number of cooling towers connected to the cold water host, and a number of cooling towers connected to the cold water host.
5. The method of claim 2 or 3, wherein determining, based on the configuration parameters, a chilling pump, a cooling pump, and a cooling tower connected with the cold water host comprises:
determining a freezing pump connected with the cold water main machine based on the freezing side rated flow of the cold water main machine and the rated flow of each freezing pump; and
and determining the cooling pump connected with the cold water main machine based on the rated flow of the cooling side of the cold water main machine and the rated flow of each cooling pump.
6. The method of claim 5, wherein determining a chilled pump connected to the chilled water main based on a chilled side rated flow of the chilled water main and a rated flow of each chilled pump comprises:
if the connection relation between the cold water main machine and the freezing pumps is configured to be connected in parallel, determining one or more freezing pumps with the ratio of the rated flow to the freezing side rated flow of the cold water main machine larger than a first ratio and smaller than a second ratio to be the freezing pumps connected with the cold water main machine, so as to add the serial numbers of the one or more freezing pumps into a serial number list of the freezing pumps connected with the cold water main machine in parallel; and
and if the connection relation between the cold water host and the freezing pump is configured to be connected in series, determining that the freezing pump corresponding to the cold water host in the plurality of cooling pumps is the freezing pump connected with the cold water host, so as to add the serial number of the freezing pump into a serial number list of the freezing pumps connected in series with the cold water host.
7. The method of claim 5, wherein determining a cooling pump connected to the chilled water main based on a chilled side rated flow of the chilled water main and a rated flow of each cooling pump comprises:
if the connection relationship of the cold water main machine and the cooling pumps is configured to be connected in parallel, determining one or more cooling pumps of the plurality of cooling pumps, the ratio of rated flow to rated flow of the cooling side of the cold water main machine being greater than a first ratio and less than a second ratio, as the cooling pumps connected with the cold water main machine, so as to add the serial number of the one or more cooling pumps to a serial number list of the cooling pumps connected in parallel with the cold water main machine; and
and if the connection relationship between the cold water host and the cooling pump is configured to be connected in series, determining that the cooling pump corresponding to the cold water host in the plurality of cooling pumps is the cooling pump connected with the cold water host, so as to add the serial number of the cooling pump into a serial number list of the cooling pumps connected in series with the cold water host.
8. The method of claim 1, wherein determining a freeze pump startup sequence that requires a startup associated with the cold water host comprises:
determining a number of currently available ones of the chilled pumps connected to the chilled water main;
if the determined number of available freezing pumps is greater than or equal to the determined number of working-in-coordination freezing pumps for the cold water main engine, determining a freezing pump startup sequence of the cold water main engine based on a plurality of freezing pumps with the highest priority ranking in the determined available freezing pumps, wherein the number of freezing pumps included in the determined freezing pump startup sequence is equal to the number of working-in-coordination freezing pumps;
if the determined number is less than the determined number of matched service freeze pumps for the cold water host, an anomaly is indicated.
9. The method of claim 1, wherein determining a cooling pump startup sequence that requires a startup associated with the cold water host comprises:
determining a number of currently available cooling pumps of the cooling pumps connected to the cold water main;
determining a cooling pump turn-on sequence for the cold water host based on a plurality of the determined available cooling pumps that are top ranked in priority if the determined number of available cooling pumps is greater than or equal to the determined number of co-operating cooling pumps for the cold water host, wherein the number of cooling pumps included in the determined cooling pump turn-on sequence is equal to the number of co-operating cooling pumps;
if the determined number is less than the determined number of service cooling pumps for the cold water host, then an anomaly is indicated.
10. The method of claim 1, wherein determining a cooling tower startup sequence requiring a coordinated startup with the cold water host comprises:
determining a number of available cooling towers currently available in the cooling towers connected to the cold water main;
determining a cooling tower startup sequence for the cold water host based on a number of cooling towers with a highest priority ranking among the determined available cooling towers if the determined number of available cooling tower pumps is greater than or equal to the determined number of working-in-flight cooling towers for the cold water host, wherein the number of cooling towers included in the determined cooling tower startup sequence is equal to the number of working-in-flight cooling towers;
if the determined number of the available cooling tower pumps is less than the number of the cooling towers for matched operation determined for the cold water main machines, determining the number of the currently started cold water main machines and the number of the currently started cooling towers in the central air-conditioning system;
determining the number of cooling towers to be started based on the minimum number of started cooling towers of each started cold water main machine;
determining a cooling tower startup sequence of the cold water main unit based on the determined available cooling tower pumps if the sum of the number of cooling towers to be started and the number of cooling towers for supporting operation is less than or equal to the sum of the determined available cooling tower pumps and the number of cooling towers which are started currently;
and if the sum of the number of cooling towers to be started and the number of cooling towers for matched operation is larger than the sum of the determined available number of cooling tower pumps and the number of the cooling towers which are started currently, indicating that an abnormity exists.
11. A computing device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor;
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-10.
12. A non-transitory computer readable storage medium having stored thereon computer instructions for causing a computer to perform the method of any one of claims 1-10.
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