CN116358117A - Control method and device of ice cold accumulation air conditioning system and electronic equipment - Google Patents

Control method and device of ice cold accumulation air conditioning system and electronic equipment Download PDF

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Publication number
CN116358117A
CN116358117A CN202111616407.3A CN202111616407A CN116358117A CN 116358117 A CN116358117 A CN 116358117A CN 202111616407 A CN202111616407 A CN 202111616407A CN 116358117 A CN116358117 A CN 116358117A
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CN
China
Prior art keywords
air conditioning
conditioning system
ice storage
storage air
ice
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Pending
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CN202111616407.3A
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Chinese (zh)
Inventor
方兴
李元阳
邱艺德
费杰
王聪
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Shanghai Meikong Smartt Building Co Ltd
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Shanghai Meikong Smartt Building Co Ltd
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Application filed by Shanghai Meikong Smartt Building Co Ltd filed Critical Shanghai Meikong Smartt Building Co Ltd
Priority to CN202111616407.3A priority Critical patent/CN116358117A/en
Priority to EP22914037.1A priority patent/EP4357692A1/en
Priority to PCT/CN2022/136337 priority patent/WO2023124782A1/en
Publication of CN116358117A publication Critical patent/CN116358117A/en
Priority to US18/517,593 priority patent/US20240151422A1/en
Pending legal-status Critical Current

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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F24F2005/0032—Systems storing energy during the night
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Abstract

The invention provides a control method and device of an ice cold accumulation air conditioning system and electronic equipment. The method is applied to a controller of the ice storage air conditioning system, and comprises the following steps: adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system; and controlling the ice cold storage air conditioning system to execute cold supply operation based on the parameters of the ice cold storage air conditioning system. In the mode, parameters of the ice cold storage air conditioning system when the cooling mode is switched can be adjusted based on the outlet temperature of the plate heat exchanger, so that the stable water outlet temperature of the ice cold storage air conditioning system is ensured, and the experience of a user is improved.

Description

Control method and device of ice cold accumulation air conditioning system and electronic equipment
Technical Field
The present invention relates to the technical field of air conditioning systems, and in particular, to a control method and apparatus for an ice storage air conditioning system, and an electronic device.
Background
The ice cold-storage air-conditioning system uses refrigeration equipment to remove heat in cold-storage medium for cold storage in the time of no or less cold-storage (such as night), and then uses the cold-storage in the cold peak period of air conditioner or industry. By applying the cold accumulation technology, the running time of the refrigeration equipment is transferred, so that on one hand, low-cost electricity at night can be utilized, and on the other hand, peak electric load at daytime is reduced, and the purposes of shifting peak and filling valley of electric power and saving electric charge are achieved. The ice cold-storage air conditioning system has the difficulty that the stability of the water supply temperature is ensured in the switching process of the double-working-condition host machine and the ice tank.
Generally, the ice storage air conditioning system sets an operation mode of the cold source device according to the current electricity price, such as an ice tank cooling mode, a double-station host cooling mode and a combined cooling mode. In the mode switching process, the traditional control strategy cannot ensure stable control of water temperature because of the delay of starting and closing of the water chilling unit. Especially for places such as factories and laboratories with strict requirements on temperature and humidity, the fluctuation range of water supply temperature is usually required to be not more than +/-0.5 ℃, and the fluctuation range of water outlet temperature is larger due to the switching control logic of the ice storage air conditioning system, so that the experience of users is influenced.
Disclosure of Invention
Accordingly, the invention aims to provide a control method, a control device and electronic equipment of an ice storage air conditioning system, so as to ensure the stable water outlet temperature in the ice storage air conditioning system and improve the experience of users.
In a first aspect, an embodiment of the present invention provides a control method of an ice storage air conditioning system, applied to a controller of the ice storage air conditioning system, where the method includes: adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system; and controlling the ice cold storage air conditioning system to execute cold supply operation based on the parameters of the ice cold storage air conditioning system.
In the preferred embodiment of the application, the cooling mode of the ice storage air conditioning system is switched from the double-working-condition host cooling mode to the ice storage tank cooling mode; the step of adjusting parameters of the ice cold storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice cold storage air conditioning system comprises the following steps: maintaining the working state of a chilled water pump of the ice storage air conditioning system, and adjusting a valve of an ice storage tank and an adjusting valve of a plate heat exchanger in the ice storage air conditioning system; the opening of the valve of the ice storage tank and the opening of the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger; and closing a water chilling unit, a cooling water pump and a cooling water tower of the ice storage air conditioning system.
In the preferred embodiment of the application, the cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the double-station host cooling mode; the step of adjusting parameters of the ice cold storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice cold storage air conditioning system comprises the following steps: determining the running number of water chilling units of the ice storage air conditioning system after the mode switching;
starting a water chilling unit, a cooling water pump and a cooling water tower with the number of running water chilling units; and adjusting the opening of a valve of an ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger.
In a preferred embodiment of the present application, the step of determining the number of operation units of the water chiller of the ice storage air conditioning system after the mode switching includes: acquiring a load before mode switching of the ice storage air conditioning system; determining a predicted load of the ice storage air conditioning system after mode switching based on the load before switching and a pre-established load prediction model; and determining the running number of the water chilling units of the ice storage air conditioning system after the mode switching based on the predicted load after the mode switching.
In a preferred embodiment of the present application, the step of adjusting the opening of the valve of the ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chiller and the outlet temperature of the plate heat exchanger includes: acquiring the actual load of the ice storage air conditioning system after the mode switching; if the difference of the water outlet temperature of the water chilling unit minus the outlet temperature of the plate heat exchanger is larger than a preset first threshold value, or the ratio of the predicted load to the actual load after mode switching is smaller than a preset proportional threshold value, the opening of a valve of an ice storage tank in the ice storage air conditioning system is improved; if the ratio of the predicted load to the actual load after the mode switching is greater than a proportional threshold, reducing the opening of a valve of an ice storage tank in the ice storage air conditioning system; and if the absolute value of the difference between the water outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger is smaller than a preset second threshold value, closing a valve of an ice storage tank in the ice storage air conditioning system.
In a preferred embodiment of the present application, the step of reducing the opening of the valve of the ice storage tank in the ice storage air conditioning system includes: determining the opening of a valve of an ice storage tank in the ice storage air conditioning system by the following formula: v1, ub= (Tch, out-wire, out)/(Tch, out-t3+tcomp); wherein V1, ub are the upper limit value of the opening degree of a valve of an ice storage tank in the ice storage air conditioning system, tch, out are the water outlet temperature of a water chilling unit, tice, out are the water outlet temperature of the ice storage tank, T3 are the outlet temperature of a plate heat exchanger, and Tcomp is a preset compensation temperature.
In a preferred embodiment of the present application, the method further includes: and switching the cooling mode of the ice storage air conditioning system based on the current power time period and/or the ice quantity of the ice storage tank of the ice storage air conditioning system.
In a preferred embodiment of the present application, the step of switching the cooling mode of the ice storage air conditioning system includes: the cold supply mode of the ice cold storage air conditioning system is switched from the double-working-condition host cold supply mode to the ice storage tank cold supply mode; or the cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the double-working-condition host cooling mode.
In a second aspect, an embodiment of the present invention further provides a control device of an ice storage air conditioning system, applied to a controller of the ice storage air conditioning system, where the device includes: the cooling parameter determining module is used for adjusting parameters of the ice cold storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice cold storage air conditioning system; and the cooling operation execution module is used for controlling the ice storage air conditioning system to execute cooling operation based on parameters of the ice storage air conditioning system.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, where the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the control method of the ice storage air conditioning system.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions that, when invoked and executed by a processor, cause the processor to implement the control method of the ice thermal storage air conditioning system.
The embodiment of the invention has the following beneficial effects:
the control method, the control device and the electronic equipment of the ice storage air conditioning system can adjust parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system, and control the ice storage air conditioning system to execute cooling operation based on the parameters of the ice storage air conditioning system. In the mode, parameters of the ice cold storage air conditioning system when the cooling mode is switched can be adjusted based on the outlet temperature of the plate heat exchanger, so that the stable water outlet temperature of the ice cold storage air conditioning system is ensured, and the experience of a user is improved.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part will be obvious from the description, or may be learned by practice of the techniques of the disclosure.
The foregoing objects, features and advantages of the disclosure will be more readily apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an ice storage air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of an ice storage air conditioning system according to an embodiment of the present invention;
fig. 3 is a flowchart of another control method of an ice storage air conditioning system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a control flow for switching a dual-station cooling mode to an ice tank cooling mode according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a control flow for switching an ice tank cooling mode to a dual-condition cooling mode according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control device of an ice storage air conditioning system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, an ice cold storage air conditioning system can set an operation mode of cold source equipment according to the current period of electricity price, such as an ice tank cold supply mode, a double-station host cold supply mode and a combined cold supply mode. In the mode switching process, the traditional control strategy cannot ensure stable control of water temperature because of the delay of starting and closing of the water chilling unit. Especially for places such as factories and laboratories with strict requirements on temperature and humidity, the fluctuation range of water supply temperature is usually required to be not more than +/-0.5 ℃, and the fluctuation range of water outlet temperature is larger due to the switching control logic of the ice storage air conditioning system, so that the experience of users is influenced.
Based on the above, the embodiment of the invention provides a control method, a device and electronic equipment of an ice cold storage air conditioning system, in particular to an intelligent undisturbed switching control method of the ice cold storage air conditioning system, which can ensure the stability of control of the outlet water temperature of plate-change chilled water and simultaneously reduce the energy consumption of a chilled water pump to the greatest extent.
For the convenience of understanding the present embodiment, a detailed description will be given of a control method of an ice storage air conditioning system disclosed in the embodiment of the present invention.
Embodiment one:
the embodiment of the invention provides a control method of an ice storage air conditioning system, which is applied to a controller of the ice storage air conditioning system.
The ice cold accumulation technology is a complete set technology which uses the off-peak time of a night power grid, uses low-price electricity to make ice cold accumulation to store cold, dissolves water during peak power consumption in daytime and supplies cold together with a refrigerating unit, and releases the cold accumulation to meet the peak load requirement of an air conditioner during peak load of the air conditioner in daytime. Referring to a schematic diagram of an ice thermal storage air conditioning system shown in fig. 1, the ice thermal storage air conditioning system includes a cold tank (which may also be referred to as a cold tank), a duplex Kuang Zhuji (i.e., a chiller unit including 2 chillers), two chilled water pumps, two plate heat exchangers, and a control box (i.e., a controller of the ice thermal storage air conditioning system), and the passages of the respective devices may be regulated by valves V1-V5. Wherein, the control box can control each valve and two chilled water pumps.
Based on the above description, referring to a flowchart of a control method of an ice thermal storage air conditioning system shown in fig. 2, the control method of the ice thermal storage air conditioning system includes the following steps:
step S202, adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system.
The power time period may include a power plateau and a power peak. Wherein, the power band is generally 22:00-8:00, the power peak segment is generally 08:00-22:00. that is, the late night is the power band and the daytime is the power peak. The ice storage tank of the ice storage air conditioning system is used for cooling only when the ice storage tank stores more ice. Therefore, the cooling mode of the ice storage air conditioning system can be switched according to the current power time period and the ice storage tank of the ice storage air conditioning system.
The cold supply mode of the ice cold storage air conditioning system can comprise a double-station host cold supply mode, an ice storage tank cold supply mode and a double-station host and ice storage tank combined cold supply mode. Specifically, the double-station host machine cooling mode is to use a water chilling unit to cool, and the ice storage tank does not cool; the ice storage tank cooling mode is to use the ice storage tank for cooling, and the water chilling unit does not supply cooling; the combined cooling mode of the double-working-condition host machine and the ice storage tank is that the ice storage tank and the water chilling unit are used for cooling simultaneously.
In the embodiment of the invention, the parameters of the ice storage air conditioning system when the cooling mode is switched are adjusted according to the outlet temperature of the plate heat exchanger of the ice storage air conditioning system. Specifically, the parameters of the ice storage air conditioning system may include the opening degree of each valve (i.e., V1 valve-V5 valve in fig. 1) and the operating frequency of the chilled water pump.
Step S204, the ice storage air conditioning system is controlled to execute the cooling operation based on the parameters of the ice storage air conditioning system.
After the parameters of the ice storage air conditioning system are determined according to the outlet temperature of the plate heat exchanger, the ice storage air conditioning system can be controlled to execute cooling operation according to the parameters of the ice storage air conditioning system, so that the fluctuation of the water supply temperature of the ice storage air conditioning system is small, and the experience of a user is improved.
The control method of the ice storage air conditioning system provided by the embodiment of the invention can adjust the parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system, and control the ice storage air conditioning system to execute cooling operation based on the parameters of the ice storage air conditioning system. In the mode, parameters of the ice cold storage air conditioning system when the cooling mode is switched can be adjusted based on the outlet temperature of the plate heat exchanger, so that the stable water outlet temperature of the ice cold storage air conditioning system is ensured, and the experience of a user is improved.
Embodiment two:
the embodiment provides another control method of an ice storage air conditioning system, which is implemented on the basis of the above embodiment, as shown in a flowchart of another control method of an ice storage air conditioning system shown in fig. 3, where the control method of an ice storage air conditioning system in this embodiment includes the following steps:
step S302, switching the cooling mode of the ice storage air conditioning system based on the current power time period and/or the ice amount of the ice storage tank of the ice storage air conditioning system.
The embodiment of the invention provides a method for intelligently switching a mode without disturbance, which comprises the following steps: the cold supply mode of the ice cold storage air conditioning system is switched from the double-working-condition host cold supply mode to the ice storage tank cold supply mode; or the cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the double-working-condition host cooling mode.
Step S304, adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system.
For switching from the dual-station host cooling mode to the ice bank cooling mode, the following steps may be performed: maintaining the working state of a chilled water pump of the ice storage air conditioning system, and adjusting a valve of an ice storage tank and an adjusting valve of a plate heat exchanger in the ice storage air conditioning system; the opening of the valve of the ice storage tank and the opening of the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger; and closing a water chilling unit, a cooling water pump and a cooling water tower of the ice storage air conditioning system.
Referring to a schematic diagram of a control flow for switching a dual-working-condition cooling mode to an ice tank cooling mode shown in fig. 4, when a time period is in a power peak section and an ice amount of an ice storage tank is greater than a lower limit threshold (e.g., 10%), the ice storage air conditioning system is switched to the ice storage tank cooling mode, in order to ensure uninterrupted operation of cooling, the cryopump continues to keep working, the controller may first open a V1 valve, and the opening of the V1 valve may be adjusted according to a board-change secondary side outlet temperature T3. And secondly, the controller sends a host shutdown signal, and the plate change regulating valve is regulated according to T3. After the controller collects the feedback of the shutdown completion of the host, the V5 valve is opened to enable the chilled water to directly flow into the ice tank. After a time delay (usually set to 5 min), the freezing valve and the cooling valve of the host are respectively closed, and after the cooling valve is closed in place, the cooling pump and the cooling tower are sequentially closed. In the mode switching process, the V1 valve always carries out PID adjustment according to the temperature T3 of the plate change outlet, so that the temperature fluctuation of T3 can be ensured not to exceed +/-0.5 ℃.
For switching from ice bank cooling mode to dual station host cooling mode, the following steps may be performed: determining the running number of water chilling units of the ice storage air conditioning system after the mode switching; starting a water chilling unit, a cooling water pump and a cooling water tower with the number of running water chilling units; and adjusting the opening of a valve of an ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger.
Referring to a schematic diagram of a control flow for switching the ice chest cooling mode to the dual-station cooling mode shown in fig. 5, the controller may establish a time-by-time load prediction model based on historical load data and outdoor weather data: q (Q) t+1 ＝f(Q t, T db,out,t ,R hout,t ,S t ) Wherein T represents the current time, t+1 represents the next time, Q is the air conditioning load, T db,out,t R is the outdoor dry bulb temperature at the current moment h,out,t For the outdoor relative humidity at the current moment, S t Is the solar radiation intensity at the current moment.
Specifically, the number of running water sets of the ice storage air conditioning system after the mode switching can be determined; starting a water chilling unit, a cooling water pump and a cooling water tower with the number of running water chilling units; and adjusting the opening of a valve of an ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger.
The number of running water sets of the ice storage air conditioning system after the mode switching can be determined by the following steps: acquiring a load before mode switching of the ice storage air conditioning system; determining a predicted load of the ice storage air conditioning system after mode switching based on the load before switching and a pre-established load prediction model; and determining the running number of the water chilling units of the ice storage air conditioning system after the mode switching based on the predicted load after the mode switching.
When the time period is 1 hour before the ice tank cooling mode is switched to the double-station main machine cooling mode, the BMS system firstly calculates the load of the current air conditioning system according to the secondary side chilled water supply and return water temperature difference T4-T3 and the secondary side chilled water flow Mch, and predicts the air conditioning load of the next hour according to the equation. Meanwhile, the number N of the hosts which are started at the next moment can be judged based on the predicted air conditioner load and the rated load of the double-working-condition hosts. When the time period is switched from the ice tank cooling mode to the double-station host cooling mode, the BMS system issues a control instruction according to the prediction result, and the host to be opened is opened in advance corresponding to the freezing valve and the cooling valve. After the freezing valve and the cooling valve of each host are opened in place, the V5 valve is closed, and the cooling tower and the cooling pump corresponding to the host are sequentially opened. After a delay (typically set to 5 min), N duplex hosts are turned on.
Specifically, the parameter adjustment may be performed by: acquiring the actual load of the ice storage air conditioning system after the mode switching; if the difference of the water outlet temperature of the water chilling unit minus the outlet temperature of the plate heat exchanger is larger than a preset first threshold value, or the ratio of the predicted load to the actual load after mode switching is smaller than a preset proportional threshold value, the opening of a valve of an ice storage tank in the ice storage air conditioning system is improved; if the ratio of the predicted load to the actual load after the mode switching is greater than a proportional threshold, reducing the opening of a valve of an ice storage tank in the ice storage air conditioning system; and if the absolute value of the difference between the water outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger is smaller than a preset second threshold value, closing a valve of an ice storage tank in the ice storage air conditioning system.
When the target value of the host water outlet temperature-T3 is more than or equal to a threshold value 1 (set to 3 ℃), or Qreal/Qpre is less than 50% (actual cold load/predicted cold load), which indicates that the loading load rate of the host is low just, the host water outlet temperature is higher, and the V1 valve performs PID adjustment according to T3 to ensure the stability of the T3 temperature. When Qreal/Qpre is more than 50%, the host load is loaded to a certain stage, and if the upper limit of the V1 valve is not limited, the ice tank always bears a part of load, and the host load cannot be continuously loaded. The opening degree of a valve of an ice storage tank in the ice storage air conditioning system can be determined by the following formula:
V1,ub＝(Tch,out-Tice,out)/(Tch,out-T3+Tcomp)；
wherein V1, ub is the upper limit value of the opening of the valve of the ice storage tank in the ice storage air conditioning system, namely the upper limit value of the V1 valve. Tch, out are the water outlet temperature of the water chilling unit, tice, out are the water outlet temperature of the ice storage tank, T3 is the outlet temperature of the plate heat exchanger, tcomp is the preset compensation temperature, and Tcomp can reflect the plate heat exchange temperature difference.
When the water outlet temperature of the host machine is equal to the target value of-T3 and is equal to the threshold value of 2 (set to 0.5 ℃), the water temperature of the dual-working-condition host machine is reduced to the required range, the V1 valve is closed, and the undisturbed switching control process is finished.
Step S306, the ice storage air conditioning system is controlled to execute cooling operation based on the parameters of the ice storage air conditioning system.
The embodiment of the invention provides the intelligent undisturbed switching control method for the ice storage air conditioning system. When the cooling mode is switched (the cooling mode of the ice storage tank is switched to the double-station host cooling mode or the double-station host cooling is switched to the ice storage tank cooling mode), a corresponding intelligent undisturbed switching control strategy is executed, and the water temperature fluctuation range is ensured not to exceed +/-0.5 ℃.
Embodiment III:
corresponding to the above method embodiment, the embodiment of the present invention provides a control device of an ice storage air conditioning system, which is applied to a controller of an ice storage air conditioning system, referring to a schematic structural diagram of the control device of the ice storage air conditioning system shown in fig. 6, where the control device of the ice storage air conditioning system includes:
the cooling parameter determining module 61 is configured to adjust parameters of the ice storage air conditioning system when the cooling mode is switched based on an outlet temperature of the plate heat exchanger of the ice storage air conditioning system;
the cooling operation execution module 62 is configured to control the ice storage air conditioning system to execute a cooling operation based on parameters of the ice storage air conditioning system.
The control device of the ice storage air conditioning system provided by the embodiment of the invention can adjust the parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system, and control the ice storage air conditioning system to execute cooling operation based on the parameters of the ice storage air conditioning system. In the mode, parameters of the ice cold storage air conditioning system when the cooling mode is switched can be adjusted based on the outlet temperature of the plate heat exchanger, so that the stable water outlet temperature of the ice cold storage air conditioning system is ensured, and the experience of a user is improved.
The cold supply mode of the ice cold storage air conditioning system is switched from the double-working-condition host cold supply mode to the ice storage tank cold supply mode; the cold supply parameter determining module is used for keeping the working state of a chilled water pump of the ice storage air conditioning system and adjusting a valve of an ice storage tank and an adjusting valve of the plate heat exchanger in the ice storage air conditioning system; the opening of the valve of the ice storage tank and the opening of the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger; and closing a water chilling unit, a cooling water pump and a cooling water tower of the ice storage air conditioning system.
The cold supply mode of the ice cold storage air conditioning system is switched from the ice storage tank cold supply mode to the double-station host machine cold supply mode; the cooling parameter determining module is used for determining the running number of the water chilling units of the ice storage air conditioning system after the mode is switched; starting a water chilling unit, a cooling water pump and a cooling water tower with the number of running water chilling units; and adjusting the opening of a valve of an ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger.
The cooling parameter determining module is used for obtaining the load before the mode switching of the ice storage air conditioning system; determining a predicted load of the ice storage air conditioning system after mode switching based on the load before switching and a pre-established load prediction model; and determining the running number of the water chilling units of the ice storage air conditioning system after the mode switching based on the predicted load after the mode switching.
The cooling parameter determining module is used for obtaining the actual load of the ice storage air conditioning system after the mode switching; if the difference of the water outlet temperature of the water chilling unit minus the outlet temperature of the plate heat exchanger is larger than a preset first threshold value, or the ratio of the predicted load to the actual load after mode switching is smaller than a preset proportional threshold value, the opening of a valve of an ice storage tank in the ice storage air conditioning system is improved; if the ratio of the predicted load to the actual load after the mode switching is greater than a proportional threshold, reducing the opening of a valve of an ice storage tank in the ice storage air conditioning system; and if the absolute value of the difference between the water outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger is smaller than a preset second threshold value, closing a valve of an ice storage tank in the ice storage air conditioning system.
The above-mentioned cooling parameter determination module is configured to determine an opening degree of a valve of an ice storage tank in an ice storage air conditioning system according to the following formula: v1, ub= (Tch, out-wire, out)/(Tch, out-t3+tcomp); wherein V1, ub are the upper limit value of the opening degree of a valve of an ice storage tank in the ice storage air conditioning system, tch, out are the water outlet temperature of a water chilling unit, tice, out are the water outlet temperature of the ice storage tank, T3 are the outlet temperature of a plate heat exchanger, and Tcomp is a preset compensation temperature.
The device further comprises: and the cooling mode switching module is used for switching the cooling mode of the ice storage air conditioning system based on the current power time period and/or the ice quantity of the ice storage tank of the ice storage air conditioning system.
The cold supply mode switching module is used for switching the cold supply mode of the ice cold storage air conditioning system from the cold supply mode of the double-working-condition host to the cold supply mode of the ice storage tank; or the cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the double-working-condition host cooling mode.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the control device of the ice storage air conditioning system described above may refer to the corresponding process in the embodiment of the control method of the ice storage air conditioning system described above, and will not be described herein again.
Embodiment four:
the embodiment of the invention also provides electronic equipment, which is used for running the control method of the ice storage air conditioning system; referring to a schematic structural diagram of an electronic device shown in fig. 7, the electronic device includes a memory 100 and a processor 101, where the memory 100 is configured to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the control method of the ice thermal storage air conditioning system.
Further, the electronic device shown in fig. 7 further includes a bus 102 and a communication interface 103, and the processor 101, the communication interface 103, and the memory 100 are connected through the bus 102.
The memory 100 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 103 (which may be wired or wireless), and may use the internet, a wide area network, a local network, a metropolitan area network, etc. Bus 102 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 7, but not only one bus or type of bus.
The processor 101 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 101 or instructions in the form of software. The processor 101 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but also digital signal processors (Digital Signal Processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field-programmable gate arrays (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 100 and the processor 101 reads information in the memory 100 and in combination with its hardware performs the steps of the method of the previous embodiments.
The embodiment of the invention also provides a computer readable storage medium, which stores computer executable instructions that, when being called and executed by a processor, cause the processor to implement the control method of the ice storage air conditioning system, and the specific implementation can be referred to the method embodiment and will not be repeated herein.
The control method, the control device and the computer program product of the electronic device of the ice storage air conditioning system provided by the embodiment of the invention comprise a computer readable storage medium storing program codes, and instructions included in the program codes can be used for executing the method in the previous method embodiment, and specific implementation can be referred to the method embodiment and will not be repeated here.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and/or apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (11)

1. A control method of an ice storage air conditioning system, applied to a controller of the ice storage air conditioning system, the method comprising:
adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system;
and controlling the ice cold storage air conditioning system to execute cold supply operation based on the parameters of the ice cold storage air conditioning system.
2. The method of claim 1, wherein the ice storage air conditioning system cold supply mode is switched from a dual-station host cold supply mode to an ice storage tank cold supply mode; the step of adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system comprises the following steps:
maintaining the working state of a chilled water pump of the ice storage air conditioning system, and adjusting a valve of an ice storage tank and an adjusting valve of the plate heat exchanger in the ice storage air conditioning system; the opening of the valve of the ice storage tank and the opening of the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger;
and closing a water chilling unit, a cooling water pump and a cooling water tower of the ice cold storage air conditioning system.
3. The method of claim 1, wherein the ice storage air conditioning system cold supply mode is switched from an ice storage tank cold supply mode to a dual-station host cold supply mode; the step of adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system comprises the following steps:
determining the running number of water chilling units of the ice storage air conditioning system after the mode switching;
starting the water chilling units, the cooling water pumps and the cooling water towers with the running number;
and adjusting the opening of a valve of an ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger.
4. The method of claim 3, wherein the step of determining the number of operation units of the ice storage air conditioning system after the mode switching comprises:
acquiring the load before the mode switching of the ice storage air conditioning system;
determining a predicted load of the ice storage air conditioning system after mode switching based on the load before switching and a pre-established load prediction model;
and determining the number of operation units of the ice storage air conditioning system after the mode switching based on the predicted load after the mode switching.
5. The method of claim 4, wherein the step of adjusting the opening of the valve of the ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chiller and the outlet temperature of the plate heat exchanger comprises:
acquiring the actual load of the ice storage air conditioning system after the mode switching;
if the difference of the outlet temperature of the plate heat exchanger subtracted by the outlet temperature of the water chilling unit is larger than a preset first threshold value, or the ratio of the predicted load after the mode switching to the actual load is smaller than a preset ratio threshold value, the opening of a valve of an ice storage tank in the ice storage air conditioning system is improved;
if the ratio of the predicted load to the actual load after the mode switching is greater than the ratio threshold, reducing the opening of a valve of an ice storage tank in the ice storage air conditioning system;
and if the absolute value of the difference between the water outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger is smaller than a preset second threshold value, closing a valve of an ice storage tank in the ice storage air conditioning system.
6. The method of claim 5, wherein the step of reducing the opening of a valve of an ice storage tank in the ice storage air conditioning system comprises:
determining the opening degree of a valve of an ice storage tank in the ice storage air conditioning system by the following formula:
V1,ub＝(Tch,out-Tice,out)/(Tch,out-T3+Tcomp)；
wherein V1, ub is the upper limit value of the opening degree of a valve of an ice storage tank in the ice storage air conditioning system, tch, out is the water outlet temperature of the water chilling unit, tice, out is the water outlet temperature of the ice storage tank, T3 is the outlet temperature of the plate heat exchanger, and Tcomp is the preset compensation temperature.
7. The method according to claim 1, wherein the method further comprises:
and switching the cooling mode of the ice storage air conditioning system based on the current power time period and/or the ice storage tank ice amount of the ice storage air conditioning system.
8. The method of claim 7, wherein the step of switching the cooling mode of the ice thermal storage air conditioning system comprises:
the cold supply mode of the ice cold storage air conditioning system is switched from a double-station host machine cold supply mode to an ice storage tank cold supply mode;
or the cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the double-station host cooling mode.
9. A control device for an ice thermal storage air conditioning system, the device comprising:
the cooling parameter determining module is used for adjusting parameters of the ice cold storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice cold storage air conditioning system;
and the cooling operation execution module is used for controlling the ice cold storage air conditioning system to execute cooling operation based on the parameters of the ice cold storage air conditioning system.
10. An electronic device comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the method of controlling an ice thermal air conditioning system of any one of claims 1 to 8.
11. A computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of controlling an ice thermal storage air conditioning system according to any one of claims 1 to 8.
CN202111616407.3A 2021-12-27 2021-12-27 Control method and device of ice cold accumulation air conditioning system and electronic equipment Pending CN116358117A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202111616407.3A CN116358117A (en) 2021-12-27 2021-12-27 Control method and device of ice cold accumulation air conditioning system and electronic equipment
EP22914037.1A EP4357692A1 (en) 2021-12-27 2022-12-02 Control method and apparatus of ice storage air conditioning system, and electronic device
PCT/CN2022/136337 WO2023124782A1 (en) 2021-12-27 2022-12-02 Control method and apparatus of ice storage air conditioning system, and electronic device
US18/517,593 US20240151422A1 (en) 2021-12-27 2023-11-22 Method and device for controlling ice storage air-conditioning system, and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111616407.3A CN116358117A (en) 2021-12-27 2021-12-27 Control method and device of ice cold accumulation air conditioning system and electronic equipment

Publications (1)

Publication Number Publication Date
CN116358117A true CN116358117A (en) 2023-06-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111616407.3A Pending CN116358117A (en) 2021-12-27 2021-12-27 Control method and device of ice cold accumulation air conditioning system and electronic equipment

Country Status (1)

Country Link
CN (1) CN116358117A (en)

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