CN112665127A - Ice storage air conditioning system and control method, device and controller thereof - Google Patents
Ice storage air conditioning system and control method, device and controller thereof Download PDFInfo
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- CN112665127A CN112665127A CN202011493400.2A CN202011493400A CN112665127A CN 112665127 A CN112665127 A CN 112665127A CN 202011493400 A CN202011493400 A CN 202011493400A CN 112665127 A CN112665127 A CN 112665127A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 179
- 238000005057 refrigeration Methods 0.000 claims description 32
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 8
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
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- 230000006870 function Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- 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
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Abstract
The application relates to an ice storage air conditioning system, a control method and device thereof and a controller. The air conditioning system comprises a refrigerating unit and an ice cold storage pool, and the method comprises the following steps: determining the total cooling capacity of the air conditioning system and the initial cooling shares of the refrigerating unit and the ice cold storage pool, and controlling the operation of the air conditioning system; after each interval of first preset time, determining the current total cooling capacity of the air conditioning system and the current cooling share of the refrigerating unit, and judging whether the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is less than or equal to a preset value or not; if not, the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to the preset value through adjustment. According to the arrangement, the ice storage air conditioning system can maximize, rationalize and freely utilize the cold quantity of the ice storage pool as required, and meanwhile, the efficient utilization of the electric energy of peak shifting and valley filling is realized, so that the system is favorable for more rationalization of cold supply, working condition maintenance, energy conservation and emission reduction.
Description
Technical Field
The application relates to the technical field of ice storage air conditioners, in particular to an ice storage air conditioning system and a control method, device and controller thereof.
Background
Because the power consumption in China is rapidly increased and the peak power is in tension at present, how to shift the peak power demand, "shift the peak and fill the valley", balance the power supply and improve the effective utilization of the electric energy becomes a problem which is seriously solved by many countries at present.
Based on the technical scheme, the application of the ice storage air conditioning technology in China becomes an irreversible trend, the ice storage air conditioning technology is to utilize the night valley load electric power to make ice and store the ice in an ice storage device, and the ice melting in the daytime releases the stored cold energy so as to reduce the air conditioning power consumption load and the installed capacity of an air conditioning system in the peak period of a power grid. The energy-saving device can effectively utilize low-ebb electric energy, has the advantages of balancing peak and valley, relieving supply tension and the like, and has good energy-saving benefit and economic benefit. However, the current ice storage air conditioning technology is not mature in utilization, for example, the problems that the ice storage amount is insufficient, the building cold energy cannot be supplied all day long, the cold energy utilization is unreasonable, the cold energy utilization rate is not high, the system cannot effectively control the input of the ice storage cold energy and the like exist.
Disclosure of Invention
The application provides an ice storage air conditioning system and a control method, a device and a controller thereof, which aim to solve the problems that the existing ice storage air conditioning technology is immature in utilization, for example, the ice storage quantity is insufficient, the building cold quantity can not be supplied all weather, the cold quantity utilization is unreasonable, the cold quantity utilization rate is not high, the system can not effectively control the input of the ice storage cold quantity, and the like.
The above object of the present application is achieved by the following technical solutions:
in a first aspect, an embodiment of the present application provides a control method for an ice storage air conditioning system, which is used for adjusting a mode in which a refrigeration unit and an ice storage pool of the ice storage air conditioning system jointly perform refrigeration, and the method includes:
determining the total cooling capacity of the ice storage air conditioning system;
determining initial cold supply shares of the refrigerating unit and the ice cold storage pool respectively based on the total cold supply amount, and controlling the refrigerating unit and the ice cold storage pool to supply cold according to the initial cold supply shares respectively;
after every interval of first preset time, determining the current total cooling capacity of the ice storage air-conditioning system and the current cooling share of the refrigerating unit;
judging whether the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to a preset value or not;
if the judgment result is negative, correspondingly adjusting the cooling capacities of the refrigerating unit and the ice cold storage tank based on the relative size of the current cooling share and the initial cooling share of the refrigerating unit, so that the absolute value of the difference value between the adjusted cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to the preset value on the premise of ensuring that the sum of the adjusted cooling capacity of the refrigerating unit and the adjusted cooling capacity of the ice cold storage tank is equal to the current total cooling capacity of the ice cold storage air-conditioning system.
Optionally, the correspondingly adjusting the cooling capacities of the refrigeration unit and the ice storage pool based on the relative size of the current cooling share and the initial cooling share of the refrigeration unit includes:
if the current cold supply share of the refrigerating unit is larger than the initial cold supply share, controlling the refrigerating unit to reduce the cold supply quantity and controlling the ice cold storage pool to increase the cold supply quantity;
and if the current cold supply share of the refrigerating unit is smaller than the initial cold supply share, controlling the refrigerating unit to increase the cold supply quantity and controlling the ice cold storage pool to reduce the cold supply quantity.
Optionally, the adjusting the cooling capacity of the refrigerating unit and the ice storage tank includes:
and adjusting the cold supply amount of the refrigerating unit by resetting the outlet temperature of the refrigerating unit, and adjusting the cold supply amount of the ice cold storage pool by adjusting the ice melting rate of the ice cold storage pool.
Optionally, the determining the total cooling capacity of the ice storage air conditioning system includes:
and determining the total cooling capacity of the ice storage air-conditioning system according to the cold load of the building cooled by the ice storage air-conditioning system.
Optionally, the first preset time is one hour.
Optionally, the method further includes:
and if so, controlling the refrigerating unit and the ice cold storage pool to maintain the current cold supply amount.
In a second aspect, an embodiment of the present application further provides a control device for an ice storage air conditioning system, which is used for adjusting a mode in which a refrigerating unit and an ice storage pool of the ice storage air conditioning system jointly perform refrigeration, and the device includes:
the first determining module is used for determining the total cooling capacity of the ice storage air conditioning system;
the second determining module is used for determining initial cold supply shares of the refrigerating unit and the ice cold storage pool respectively based on the total cold supply amount and controlling the refrigerating unit and the ice cold storage pool to supply cold according to the initial cold supply shares;
the third determining module is used for determining the current total cooling capacity of the ice storage air-conditioning system and the current cooling share of the refrigerating unit after every first preset time interval;
the judgment module is used for judging whether the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to a preset value or not;
and the adjusting module is used for correspondingly adjusting the cooling capacities of the refrigerating unit and the ice cold storage tank based on the relative size of the current cooling share and the initial cooling share of the refrigerating unit if the judgment result is negative, so that the absolute value of the difference value between the adjusted cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to the preset value on the premise of ensuring that the sum of the adjusted cooling capacity of the refrigerating unit and the adjusted cooling capacity of the ice cold storage tank is equal to the current total cooling capacity of the ice cold storage air-conditioning system.
Optionally, the adjusting module is specifically configured to:
if the current cold supply share of the refrigerating unit is larger than the initial cold supply share, controlling the refrigerating unit to reduce the cold supply quantity and controlling the ice cold storage pool to increase the cold supply quantity;
and if the current cold supply share of the refrigerating unit is smaller than the initial cold supply share, controlling the refrigerating unit to increase the cold supply quantity and controlling the ice cold storage pool to reduce the cold supply quantity.
Optionally, the adjusting module is specifically configured to:
and adjusting the cold supply amount of the refrigerating unit by resetting the outlet temperature of the refrigerating unit, and adjusting the cold supply amount of the ice cold storage pool by adjusting the ice melting rate of the ice cold storage pool.
Optionally, the first determining module is specifically configured to:
and determining the total cooling capacity of the ice storage air-conditioning system according to the cold load of the building cooled by the ice storage air-conditioning system.
Optionally, the first preset time is one hour.
Optionally, the adjusting module is further configured to:
and if so, controlling the refrigerating unit and the ice cold storage pool to maintain the current cold supply amount.
In a third aspect, an embodiment of the present application further provides a controller of an ice storage air conditioning system, including:
a memory and a processor coupled to the memory;
the memory is used for storing a program, and the program is at least used for realizing the control method of the ice storage air conditioning system in any one of the first aspect;
the processor is used for calling and executing the program stored in the memory.
In a fourth aspect, embodiments of the present application further provide an ice storage air conditioning system, which includes the controller of the third aspect.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the technical scheme provided by the embodiment of the application, the initial cooling shares of the refrigerating unit and the ice storage tank are determined according to the total cooling capacity of the system and are controlled to operate, then the current total cooling capacity of the system and the current cooling share of the refrigerating unit are determined again at intervals of first preset time, when the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is larger than the preset value, the cooling capacity of the refrigerating unit and the ice storage tank is adjusted so as to ensure that the difference value is less than or equal to the preset value under the condition of ensuring the normal total cooling capacity of the system, thereby realizing the maximized, rationalized and free utilization of the cold energy of the ice cold storage pool by the ice cold storage air conditioning system according to the requirement, meanwhile, the high-efficiency utilization of 'peak shifting and valley filling' of electric energy is realized, and the system is favorable for more rationalization of cooling, working condition maintenance, energy conservation and emission reduction.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of an ice storage air conditioning system according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a control method of an ice storage air conditioning system according to an embodiment of the present application;
fig. 3 is a schematic diagram of a specific implementation flow of a control method of an ice storage air conditioning system according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a control device of an ice storage air conditioning system according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a controller of an ice storage air conditioning system according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
In order to make the solution of the present application easier to understand, the structure and the operation principle of the ice storage air conditioning system will be briefly described.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an ice storage air conditioning system according to an embodiment of the present application. As shown in fig. 1, the system mainly includes a refrigeration unit (the refrigeration unit is a dual-working condition refrigeration unit, that is, a conventional working condition of refrigerating through a heat exchanger and a working condition of ice making and cold storage for an ice cold storage pool can be realized), a pump, a heat exchanger, a pipe network, an ice cold storage pool, an electric control valve, and a control system for controlling the operation of the air conditioning system.
The air conditioning system comprises 4 loops: firstly, a refrigerating unit refrigerating loop, namely valves 1 and 4 are closed, valves 2 and 3 are opened, and at the moment, the refrigerating unit exchanges heat and refrigerates from a first heat exchanger through a refrigerating pump; secondly, the ice storage tank makes ice, namely the valves 1 and 4 are opened, the valves 2 and 3 are closed, and the refrigerating unit is driven by the refrigerating pump to carry out cold storage on the ice storage tank; thirdly, an ice-melting refrigeration loop of the ice cold storage pool is formed, namely valves 1 and 4 are closed, valves 2 and 3 are opened, ice in the ice cold storage pool passes through the ice-melting pump and reaches a second heat exchanger for heat exchange refrigeration; and fourthly, the cold storage tank and the refrigerating unit are combined to supply cold, namely the valves 1 and 4 are closed, the valves 2 and 3 are opened, the backwater of the water collector at the user side is driven by the downstream ice melting pump to exchange heat through the first heat exchanger, the water supply temperature is initially reduced, then the water supply temperature is reduced again through the second heat exchanger, the requirement of the water supply temperature is met, and the backwater enters the water separator to supply cold for the room of the building.
This application is based on above-mentioned system, jointly supplies cold mode (refrigerating unit, the whole operations of a plurality of pumps this moment, valve 1, 4 are closed, and valve 2, 3 are opened) to ice cold-storage pond and refrigerating unit and improves, also improves the process of the equal cyclic operation of first, third, fourth return circuit promptly to realize the cold volume in the utilization ice cold-storage pond of ice cold-storage air conditioning system maximize, rationalize, the liberalization as required. The following examples are given for the purpose of illustration.
Examples
Referring to fig. 2, fig. 2 is a schematic flow chart of a control method of an ice storage air conditioning system according to an embodiment of the present application. As shown in fig. 2, the method comprises at least the following steps:
s201: determining the total cooling capacity of the ice storage air conditioning system;
specifically, the refrigeration of the ice storage air conditioning system is to meet the requirement of the cold load of the building, so the total cooling capacity of the ice storage air conditioning system can be determined according to the cold load of the building cooled by the ice storage air conditioning system, and the cold load of the building can be determined based on the relevant design specifications of the building, which belongs to a common method and is not detailed in detail.
S202: determining initial cold supply shares of the refrigerating unit and the ice cold storage pool respectively based on the total cold supply amount, and controlling the refrigerating unit and the ice cold storage pool to supply cold according to the initial cold supply shares respectively; the cooling share of the refrigerating unit and the ice cold storage pool is the ratio of the cooling capacity of the refrigerating unit or the ice cold storage pool to the total cooling capacity of the system;
specifically, the amount of cooling (refrigerating capacity) of each of the refrigerating unit or the ice storage tank needs to be determined, and then the cooling share is determined based on the cooling capacity. For example, the cooling capacity W of the refrigerating unit is obtainedMachine setThen, the total cooling capacity W of the air conditioning system determined in combination with the previous stepGeneral assemblyBy the formula
Determining the cooling share eta of the refrigerating unit, and then further determining the cooling share (1-eta) of the cold storage tankIn practical application, the total cooling capacity W of the air conditioning systemGeneral assemblyCan be the total cooling capacity in unit time, and correspondingly, the cooling capacity W of the refrigerating unitMachine setAnd is the cooling capacity per unit time.
In addition, there are various ways to determine the respective cooling capacities (refrigerating capacities) of the refrigerating unit or the ice storage pool, for example, in practical applications, the control system may feed back the real-time cooling capacity (i.e., the total cooling capacity) of the air conditioning system and the cooling capacity of the refrigerating unit (which may also be obtained by calculating parameters such as the temperature difference and the flow rate on the freezing side), and further may determine the cooling capacity of the ice storage pool by using the building cooling capacity-the cooling capacity of the refrigerating unit ═ the cooling capacity of the ice storage pool; in addition, the ice-melting state of the ice cold storage pool can be fed back on the system monitoring platform, so that the ice-melting refrigerating capacity, namely the cold supply capacity of the ice cold storage pool, can be calculated, and the cold supply capacity of the refrigerating unit can be calculated.
In this embodiment, when the system is running, the total cooling capacity of the air conditioning system is determined first, and then the initial cooling share η of the refrigeration unit is determined reasonably according to the total cooling capacity1And initial cold supply share 1-eta of ice cold storage pool1So as to rationalize the operation of the air conditioning system.
S203: after every interval of first preset time, determining the current total cooling capacity of the ice storage air-conditioning system and the current cooling share of the refrigerating unit;
specifically, after the air conditioning system operates for a period of time, the current total cooling capacity of the air conditioning system and the current cooling capacity of the refrigerating unit may be different from the previous total cooling capacity of the air conditioning system, and therefore, in order to adjust the air conditioning system, in this embodiment, after every first preset time, the current total cooling capacity of the air conditioning system, the current cooling capacity of the refrigerating unit, and the current cooling share η of the refrigerating unit are determined again according to the above-mentioned manner2. The first preset time may be, for example, one hour.
S204: judging whether the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to a preset value or not;
specifically, in practical applications, the operating parameter characteristics of both the air conditioning system and the refrigeration unit are setNormally fluctuating within a specific range, so that the absolute value | η |, of the difference between the current cooling fraction and the initial cooling fraction of the refrigerating unit1-η2| is less than or equal to a preset value
In the process, the refrigerating units and the ice cold storage pool are considered to be normal in cooling capacity and do not need to be adjusted; otherwise, the refrigerating unit and the ice cold storage pool are considered to have abnormal cooling capacity and need to be adjusted.
S205: if the judgment result is negative, correspondingly adjusting the cooling capacities of the refrigerating unit and the ice cold storage tank based on the relative size of the current cooling share and the initial cooling share of the refrigerating unit, so that the absolute value of the difference value between the adjusted cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to the preset value on the premise of ensuring that the sum of the adjusted cooling capacity of the refrigerating unit and the adjusted cooling capacity of the ice cold storage tank is equal to the current total cooling capacity of the ice cold storage air-conditioning system.
That is, the determination result in the previous step is
In time (when the cooling capacity of the refrigerating unit and the ice storage tank is abnormal), the cooling capacity of the refrigerating unit and the ice storage tank needs to be adjusted, and when the adjustment is carried out, the total cooling capacity of the air conditioning system needs to be ensured to be unchanged at first so as to meet the cooling load requirement of the building, and the cooling shares of the refrigerating unit and the ice storage tank need to be restored to the normal fluctuation range of the initial setting.
Wherein, when the judgment result is
There are two specific cases: eta1＞η2Or η1＜η2(ii) a Based on this, if the refrigerating unit is currently supplied with cold eta2Greater than the initial cooling contribution eta1Controlling the refrigerating unit to reduce the cooling capacity and controlling the ice cold storage pool to increase the cooling capacity; if the current cooling share of the refrigerating unitη2Less than the initial cooling contribution eta1And controlling the refrigerating unit to increase the cooling capacity and controlling the ice storage tank to reduce the cooling capacity.
That is, when η1＞η2In time, the cold supply share of the current refrigerating unit is over, and the cold supply share of the ice cold storage pool is too little, so that in the case, the refrigerating unit needs to reduce the cold supply amount, and the ice cold storage pool increases the cold supply amount; conversely, when η1＜η2In this case, the refrigerating unit needs to increase the cooling capacity, and the ice cold storage pool needs to decrease the cooling capacity.
More specifically, based on the foregoing description, it can be known that the backwater of the user-side water collector is subjected to twice heat exchange and cooling through the two heat exchangers, the cooling at the first heat exchanger is performed by the refrigerating unit (the outlet temperature of the first heat exchanger may be 7 ℃ for example), the cooling at the second heat exchanger is performed by the ice cold storage pool (the outlet temperature of the second heat exchanger may be 3 ℃ for example), and the final outlet temperature after twice heat exchange and cooling meets the refrigeration requirement in the building. Thus, in some embodiments, the amount of refrigeration supplied to the refrigeration unit can be adjusted by resetting the outlet temperature of the refrigeration unit, i.e., the outlet temperature setpoint can be lowered when the refrigeration unit has an excessively large share of refrigeration, and the outlet temperature setpoint can be raised when the refrigeration unit has an excessively small share of refrigeration. Correspondingly, in order to ensure that the final outlet temperature (the outlet temperature of the second heat exchanger) is normal, when the cooling capacity of the refrigerating unit is adjusted, the cooling capacity of the ice cold storage pool is adaptively adjusted by using the system heat exchange principle. The regulation of the cold supply quantity of the ice cold storage pool can be realized by regulating the ice melting rate of the ice cold storage pool.
In addition, if the determination result in the step S204 is yes, the refrigeration unit and the ice storage tank may be controlled to maintain the current cooling capacity.
According to the technical scheme, the initial cold supply share of the refrigerating unit and the ice cold storage pool is determined according to the total cold supply of the system and the operation of the refrigerating unit and the ice cold storage pool is controlled, then the current total cold supply of the system and the current cold supply share of the refrigerating unit are re-determined every first preset time, and when the absolute value of the difference value between the current cold supply share of the refrigerating unit and the initial cold supply share is larger than a preset value, the cold supply of the refrigerating unit and the cold storage pool is adjusted, so that the difference value is smaller than or equal to the preset value under the condition that the normal total cold supply of the system is ensured, the ice cold storage air conditioning system can maximize, rationalize and freely utilize the cold storage of the ice storage pool as required, meanwhile, the efficient utilization of 'peak load shifting' of electric energy is realized, and the system is favorable for more rationalizing cold supply, maintaining working conditions, saving energy and reducing emission.
In addition, the control method can also consider combining other different initial cooling share values to more finely control the cooling capacity output of the ice storage pool to 25%, 50%, 75% and the like, and has important reference value.
In order to make the technical solution of the present application easier to understand, the following description is given by way of a specific example.
Referring to fig. 3, fig. 3 is a schematic diagram of a specific implementation flow of a control method of an ice storage air conditioning system according to an embodiment of the present application.
As shown in fig. 3, in the process, a control strategy is first determined according to the building cooling load demand, and the proportion η of the cooling capacity of the initial (refrigerating) unit is set1(i.e., cooling fraction); then, at an interval of 3600S, the control platform obtains the real-time cooling capacity of the unit and the real-time total cooling capacity of the system, and determines the ratio eta of the real-time unit cooling capacity2And the control system checks whether the conditions are satisfied
If so, indicating that the system runs normally, setting the outlet temperature of the refrigerator according to the original selection corresponding mode, and supplying cold energy to the building by the refrigerator set and the ice storage pool (namely the ice cold storage pool) according to the conventional scheme; if not, the system operation is abnormal, and the system operation is divided into two conditions: when eta1>η2When the temperature of the outlet of the refrigerator is reset, the reset value is smaller than the original set valueThe value is that the refrigerating unit supplies cold to increase, the ice storage pool supplies cold to decrease, and then the building is supplied with cold in the state; when eta1<η2When the temperature of the outlet of the refrigerator is reset, and the reset value is larger than the original set value, the refrigerating unit supplies cold quantity to be reduced, the cold quantity supplied by the ice storage pool is increased, and then the building is supplied with cold in the state.
In addition, corresponding to the control method of the ice storage air conditioning system provided by the embodiment, the embodiment of the application also provides a control device of the ice storage air conditioning system.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a control device of an ice storage air conditioning system according to an embodiment of the present application, where the control device is used to adjust a mode in which a refrigeration unit and an ice storage pool of the ice storage air conditioning system jointly perform refrigeration. As shown in fig. 4, the apparatus includes:
the first determining module 41 is used for determining the total cooling capacity of the ice storage air conditioning system;
a second determining module 42, configured to determine initial cooling shares of the refrigeration unit and the ice storage tank, respectively, based on the total cooling capacity, and control the refrigeration unit and the ice storage tank to perform cooling according to the initial cooling shares;
a third determining module 43, configured to determine, every first preset time interval, a current total cooling capacity of the ice storage air conditioning system and a current cooling share of the refrigeration unit;
the judging module 44 is configured to judge whether an absolute value of a difference between a current cooling share and an initial cooling share of the refrigeration unit is smaller than or equal to a preset value;
and the adjusting module 45 is configured to correspondingly adjust the cooling capacities of the refrigerating unit and the ice storage tank based on the relative sizes of the current cooling share and the initial cooling share of the refrigerating unit if the determination result is negative, so that the absolute value of the difference between the adjusted cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to the preset value on the premise of ensuring that the sum of the adjusted cooling capacity of the refrigerating unit and the adjusted cooling capacity of the ice storage tank is equal to the current total cooling capacity of the ice storage air conditioning system.
Optionally, the adjusting module 45 is specifically configured to:
if the current cold supply share of the refrigerating unit is larger than the initial cold supply share, controlling the refrigerating unit to reduce the cold supply quantity and controlling the ice cold storage pool to increase the cold supply quantity;
and if the current cold supply share of the refrigerating unit is smaller than the initial cold supply share, controlling the refrigerating unit to increase the cold supply quantity and controlling the ice cold storage pool to reduce the cold supply quantity.
Optionally, the adjusting module 45 is specifically configured to:
and adjusting the cold supply amount of the refrigerating unit by resetting the outlet temperature of the refrigerating unit, and adjusting the cold supply amount of the ice cold storage pool by adjusting the ice melting rate of the ice cold storage pool.
Optionally, the first determining module 41 is specifically configured to:
and determining the total cooling capacity of the ice storage air-conditioning system according to the cold load of the building cooled by the ice storage air-conditioning system.
Optionally, the first preset time is one hour.
Optionally, the adjusting module 45 is further configured to:
and if so, controlling the refrigerating unit and the ice cold storage pool to maintain the current cold supply amount.
The specific implementation method of the steps implemented by the functional modules may refer to corresponding contents in the foregoing method embodiments, and details are not described here.
In addition, corresponding to the control method of the ice storage air conditioning system provided by the embodiment, the embodiment of the application also provides a controller of the ice storage air conditioning system.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a controller of an ice storage air conditioning system according to an embodiment of the present application. As shown in fig. 5, the controller includes:
a memory 51 and a processor 52 connected to the memory 51;
the memory 51 is used for storing a program for implementing at least the refrigeration control method of the ice storage air conditioning system described in the above method embodiment;
the processor 52 is used to call and execute the program stored in the memory 51.
The controller is also applied to the control system of the ice storage air conditioning system shown in fig. 1, so that the control of the ice storage air conditioning system can be realized according to the control method. Moreover, the specific implementation process of the method implemented by the program in the controller may refer to the corresponding content in the foregoing method embodiments, and will not be described in detail here.
According to the technical scheme, the initial cold supply share of the refrigerating unit and the ice cold storage pool is determined according to the total cold supply of the system and the operation of the refrigerating unit and the ice cold storage pool is controlled, then the current total cold supply of the system and the current cold supply share of the refrigerating unit are re-determined every first preset time, and when the absolute value of the difference value between the current cold supply share of the refrigerating unit and the initial cold supply share is larger than a preset value, the cold supply of the refrigerating unit and the cold storage pool is adjusted, so that the difference value is smaller than or equal to the preset value under the condition that the normal total cold supply of the system is ensured, the ice cold storage air conditioning system can maximize, rationalize and freely utilize the cold storage of the ice storage pool as required, meanwhile, the efficient utilization of 'peak load shifting' of electric energy is realized, and the system is favorable for more rationalizing cold supply, maintaining working conditions, saving energy and reducing emission.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (14)
1. A control method of an ice storage air conditioning system is characterized by being used for adjusting the mode of jointly refrigerating a refrigerating unit and an ice storage pool of the ice storage air conditioning system, and the method comprises the following steps:
determining the total cooling capacity of the ice storage air conditioning system;
determining initial cold supply shares of the refrigerating unit and the ice cold storage pool respectively based on the total cold supply amount, and controlling the refrigerating unit and the ice cold storage pool to supply cold according to the initial cold supply shares respectively;
after every interval of first preset time, determining the current total cooling capacity of the ice storage air-conditioning system and the current cooling share of the refrigerating unit;
judging whether the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to a preset value or not;
if the judgment result is negative, correspondingly adjusting the cooling capacities of the refrigerating unit and the ice cold storage tank based on the relative size of the current cooling share and the initial cooling share of the refrigerating unit, so that the absolute value of the difference value between the adjusted cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to the preset value on the premise of ensuring that the sum of the adjusted cooling capacity of the refrigerating unit and the adjusted cooling capacity of the ice cold storage tank is equal to the current total cooling capacity of the ice cold storage air-conditioning system.
2. The method as claimed in claim 1, wherein the adjusting the amount of cooling supplied to the refrigeration unit and the ice bank based on the relative magnitude of the current cooling share and the initial cooling share of the refrigeration unit comprises:
if the current cold supply share of the refrigerating unit is larger than the initial cold supply share, controlling the refrigerating unit to reduce the cold supply quantity and controlling the ice cold storage pool to increase the cold supply quantity;
and if the current cold supply share of the refrigerating unit is smaller than the initial cold supply share, controlling the refrigerating unit to increase the cold supply quantity and controlling the ice cold storage pool to reduce the cold supply quantity.
3. The method of claim 1, wherein said adjusting the amount of cooling provided to the refrigeration unit and the cold storage pool comprises:
and adjusting the cold supply amount of the refrigerating unit by resetting the outlet temperature of the refrigerating unit, and adjusting the cold supply amount of the ice cold storage pool by adjusting the ice melting rate of the ice cold storage pool.
4. The method of claim 1, wherein said determining a total cooling capacity of the ice storage air conditioning system comprises:
and determining the total cooling capacity of the ice storage air-conditioning system according to the cold load of the building cooled by the ice storage air-conditioning system.
5. The method of claim 1, wherein the first predetermined time is one hour.
6. The method of any one of claims 1-5, further comprising:
and if so, controlling the refrigerating unit and the ice cold storage pool to maintain the current cold supply amount.
7. A control device of an ice storage air conditioning system, which is used for adjusting the mode of jointly refrigerating a refrigerating unit and an ice storage pool of the ice storage air conditioning system, and comprises:
the first determining module is used for determining the total cooling capacity of the ice storage air conditioning system;
the second determining module is used for determining initial cold supply shares of the refrigerating unit and the ice cold storage pool respectively based on the total cold supply amount and controlling the refrigerating unit and the ice cold storage pool to supply cold according to the initial cold supply shares;
the third determining module is used for determining the current total cooling capacity of the ice storage air-conditioning system and the current cooling share of the refrigerating unit after every first preset time interval;
the judgment module is used for judging whether the absolute value of the difference value between the current cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to a preset value or not;
and the adjusting module is used for correspondingly adjusting the cooling capacities of the refrigerating unit and the ice cold storage tank based on the relative size of the current cooling share and the initial cooling share of the refrigerating unit if the judgment result is negative, so that the absolute value of the difference value between the adjusted cooling share and the initial cooling share of the refrigerating unit is smaller than or equal to the preset value on the premise of ensuring that the sum of the adjusted cooling capacity of the refrigerating unit and the adjusted cooling capacity of the ice cold storage tank is equal to the current total cooling capacity of the ice cold storage air-conditioning system.
8. The apparatus of claim 7, wherein the adjustment module is specifically configured to:
if the current cold supply share of the refrigerating unit is larger than the initial cold supply share, controlling the refrigerating unit to reduce the cold supply quantity and controlling the ice cold storage pool to increase the cold supply quantity;
and if the current cold supply share of the refrigerating unit is smaller than the initial cold supply share, controlling the refrigerating unit to increase the cold supply quantity and controlling the ice cold storage pool to reduce the cold supply quantity.
9. The apparatus of claim 7, wherein the adjustment module is specifically configured to:
and adjusting the cold supply amount of the refrigerating unit by resetting the outlet temperature of the refrigerating unit, and adjusting the cold supply amount of the ice cold storage pool by adjusting the ice melting rate of the ice cold storage pool.
10. The apparatus of claim 7, wherein the first determining module is specifically configured to:
and determining the total cooling capacity of the ice storage air-conditioning system according to the cold load of the building cooled by the ice storage air-conditioning system.
11. The apparatus of claim 7, wherein the first predetermined time is one hour.
12. The apparatus of any of claims 7-11, wherein the adjustment module is further configured to:
and if so, controlling the refrigerating unit and the ice cold storage pool to maintain the current cold supply amount.
13. A controller for an ice storage air conditioning system, comprising:
a memory and a processor coupled to the memory;
the memory for storing a program for implementing at least the control method of the ice storage air conditioning system as claimed in any one of claims 1 to 6;
the processor is used for calling and executing the program stored in the memory.
14. An ice storage air conditioning system comprising the controller of claim 13.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654612A (en) * | 2022-10-26 | 2023-01-31 | 珠海格力电器股份有限公司 | Diagnosis method and device of ice cold storage system and ice cold storage equipment |
| CN115859674A (en) * | 2022-12-22 | 2023-03-28 | 深圳市中鼎空调净化有限公司 | Ice storage coil pipe design and evaluation method and ice storage air conditioning unit |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06300374A (en) * | 1993-04-09 | 1994-10-28 | Toshiba Corp | Air conditioner |
| JPH102595A (en) * | 1996-06-13 | 1998-01-06 | Mitsubishi Electric Corp | Thermal storage type air conditioner |
| JPH1062020A (en) * | 1996-08-22 | 1998-03-06 | Matsushita Refrig Co Ltd | Heat-storage type air-conditioner |
| JP2002061897A (en) * | 2000-08-24 | 2002-02-28 | Matsushita Refrig Co Ltd | Heat storage type air conditioner |
| JP2006292358A (en) * | 2006-06-15 | 2006-10-26 | Mitsubishi Electric Corp | Heat accumulation type air conditioner |
| CN205783981U (en) * | 2016-05-20 | 2016-12-07 | 东莞理工学院 | A kind of distributed energy resource system of active accumulation of energy regulation and control |
| CN107560034A (en) * | 2017-08-24 | 2018-01-09 | 浙江万克新能源科技有限公司 | A kind of Optimization Scheduling of ice-chilling air conditioning system |
| CN108361885A (en) * | 2018-01-30 | 2018-08-03 | 深圳市奥宇节能技术股份有限公司 | A kind of ice-chilling air conditioning system dynamic programming method |
| CN208475530U (en) * | 2018-07-09 | 2019-02-05 | 陈逸丹 | A kind of air conditioner energy saving cold accumulation system having a variety of cooling modes |
| CN110657512A (en) * | 2018-06-29 | 2020-01-07 | 清华大学 | Ice storage air conditioner economic analysis method and device based on thermoelectric combined scheduling |
| 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 |
| CN211781655U (en) * | 2019-11-06 | 2020-10-27 | 珠海新源热力有限公司 | Regional cold supply system capable of dynamically accumulating cold |
-
2020
- 2020-12-16 CN CN202011493400.2A patent/CN112665127B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06300374A (en) * | 1993-04-09 | 1994-10-28 | Toshiba Corp | Air conditioner |
| JPH102595A (en) * | 1996-06-13 | 1998-01-06 | Mitsubishi Electric Corp | Thermal storage type air conditioner |
| JPH1062020A (en) * | 1996-08-22 | 1998-03-06 | Matsushita Refrig Co Ltd | Heat-storage type air-conditioner |
| JP2002061897A (en) * | 2000-08-24 | 2002-02-28 | Matsushita Refrig Co Ltd | Heat storage type air conditioner |
| JP2006292358A (en) * | 2006-06-15 | 2006-10-26 | Mitsubishi Electric Corp | Heat accumulation type air conditioner |
| CN205783981U (en) * | 2016-05-20 | 2016-12-07 | 东莞理工学院 | A kind of distributed energy resource system of active accumulation of energy regulation and control |
| CN107560034A (en) * | 2017-08-24 | 2018-01-09 | 浙江万克新能源科技有限公司 | A kind of Optimization Scheduling of ice-chilling air conditioning system |
| CN108361885A (en) * | 2018-01-30 | 2018-08-03 | 深圳市奥宇节能技术股份有限公司 | A kind of ice-chilling air conditioning system dynamic programming method |
| CN110657512A (en) * | 2018-06-29 | 2020-01-07 | 清华大学 | Ice storage air conditioner economic analysis method and device based on thermoelectric combined scheduling |
| CN208475530U (en) * | 2018-07-09 | 2019-02-05 | 陈逸丹 | A kind of air conditioner energy saving cold accumulation system having a variety of cooling modes |
| 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 |
| CN211781655U (en) * | 2019-11-06 | 2020-10-27 | 珠海新源热力有限公司 | Regional cold supply system capable of dynamically accumulating cold |
Non-Patent Citations (1)
| Title |
|---|
| 刘道平: "《蓄冷技术及其应用现状》", 《暖通空调》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654612A (en) * | 2022-10-26 | 2023-01-31 | 珠海格力电器股份有限公司 | Diagnosis method and device of ice cold storage system and ice cold storage equipment |
| CN115859674A (en) * | 2022-12-22 | 2023-03-28 | 深圳市中鼎空调净化有限公司 | Ice storage coil pipe design and evaluation method and ice storage air conditioning unit |
| CN115859674B (en) * | 2022-12-22 | 2023-08-08 | 深圳市中鼎空调净化有限公司 | Ice storage coil design and evaluation method and ice storage air conditioning unit |
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