CN115143558B - Air conditioner demand response control method and refrigeration system capable of independently controlling temperature and humidity - Google Patents
Air conditioner demand response control method and refrigeration system capable of independently controlling temperature and humidity Download PDFInfo
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- 230000004044 response Effects 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005057 refrigeration Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 422
- 238000009825 accumulation Methods 0.000 claims abstract description 210
- 238000001816 cooling Methods 0.000 claims description 25
- 230000005855 radiation Effects 0.000 claims description 22
- 238000013486 operation strategy Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000007791 dehumidification Methods 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 9
- 238000011217 control strategy Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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Abstract
The invention provides a temperature and humidity independent control air conditioner demand response control method and a refrigeration system, and belongs to the field of air conditioner system operation regulation and control. According to the temperature and humidity independent control air conditioner demand response control method and the refrigerating system, on the basis of effectively reducing the cold accumulation amount by combining the advantages of the temperature and humidity independent control air conditioner system and the water cold accumulation system, the cold accumulation and cold release of the cold accumulation water tank are effectively scheduled, and on the premise that the thermal comfort is in an acceptable range of indoor personnel, the operation scheme of the air conditioner system in the demand response period is flexibly selected according to the relation between the actual maximum cold accumulation amount of the cold accumulation water tank and the theoretical cold accumulation amount. Compared with the prior art, the invention ensures the energy flexibility and better controllability, fully utilizes the demand response potential of the chilled water storage system, can reduce the power peak load, improves the supply and demand current situation of the power grid, and reduces the running energy consumption of the air conditioning system.
Description
Technical Field
The invention relates to the field of operation regulation of air conditioning systems, in particular to a temperature and humidity independent control air conditioning demand response control method and a refrigeration system.
Background
With rapid development of socioeconomic and transformation and upgrading of energy structures, social demand for electric power continues to grow rapidly and shows a remarkable peak Gu Chayi due to human activities, thereby posing a serious challenge to reliability of power supply. At present, the load characteristic of the power grid in the summer electricity utilization peak period of China is continuously deteriorated, the electricity utilization shortage phenomenon frequently occurs, and although the electricity utilization shortage phenomenon can be relieved by constructing a peak regulation power plant and expanding the installed capacity, the peak load is not reduced by the action, the construction cost of the power grid is certainly increased, and the sustainable development of the intelligent power grid is not facilitated.
Meanwhile, as global climate warms, summer high-temperature weather increases, extremely high temperature day continuously appears, and therefore the proportion of air conditioner isothermal control loads is increased year by year, and the load proportion of air conditioner loads in most areas in China in the electricity utilization peak period is nearly half. Considering the air conditioner load as a flexible temperature control load, the method has the characteristic of quick response to short-time regulation and control, and is a demand response resource with great potential. Therefore, a reasonable air conditioning system control strategy is researched and formulated, the air conditioning system control strategy participates in the demand side response, and the air conditioning system control strategy has important significance in improving the current supply and demand states of the power grid, reducing peak load and reducing the construction cost of the power grid. The cold accumulation air conditioner technology is used as an important content of power demand side management, and can ensure energy flexibility and keep good controllability, but the conventional water cold accumulation air conditioner can cause large cold accumulation amount due to heat and humidity combined treatment, so that economy and practicability are affected. In addition, aiming at the conventional chilled water storage air conditioning system project in the actual operation at present, a series connection mode of a chiller and a cold storage device is generally adopted, but the phenomenon of poor operation effect is easily caused by the influence of various factors such as technical experience of workers, system parameter setting, control strategy operation and the like in the actual process. For example, when a water cold storage air conditioning system adopts a form of connecting a cold machine and cold storage equipment in series and adopts a cold storage equipment preferential cold release strategy, the situation that the cold storage capacity of the cold storage equipment cannot meet the requirement easily occurs in certain extremely severe weather, in this case, if the cold release strategy is not reasonably optimized according to the load change characteristics, the situation that the cold machine still needs to be started for cold supply in the power load peak period still occurs, meanwhile, due to the sudden nature of an event, the internal thermal comfort in a short time chamber can still occur and cannot be controlled, so that the internal thermal comfort deviates from the normal range.
Considering that the temperature and humidity independent control air conditioning system is respectively processed and adjusted by the independent subsystems, if only sensible heat cold load is stored, compared with the conventional chilled water storage air conditioner which needs to store total cold load, the chilled water storage amount can be obviously reduced. Therefore, by combining the temperature and humidity independent control air conditioning system with the chilled water storage system and formulating a proper control strategy, on one hand, the problems of the conventional chilled water storage air conditioner can be avoided, and on the other hand, the demand response potential of the chilled water storage system can be fully utilized, so that the pressure in the peak period of power load is reduced.
Disclosure of Invention
In order to solve the problems, the invention discloses a temperature and humidity independent control air conditioner demand response control method and a refrigerating system, which are used for effectively scheduling the cold storage and the cold release of a cold storage water tank, and selecting a reasonable demand response period air conditioner system operation scheme according to the relation between the actual maximum cold storage amount of the cold storage water tank and the theoretical cold storage amount on the premise that the thermal comfort is in an acceptable range so as to fully utilize the demand response potential of a water cold storage system and realize the reduction of electric peak load.
The invention is realized by the following technical scheme:
the temperature and humidity independent control air conditioner demand response control method and the refrigerating system are applied to a temperature and humidity independent control air conditioner system, wherein the temperature and humidity independent control air conditioner system comprises a controller, a humidity control subsystem and a temperature control subsystem; the humidity control subsystem comprises a water chilling unit, a circulating water pump and a dehumidifying fresh air unit; the temperature control subsystem comprises a high-temperature water chilling unit, a circulating water pump, a cold storage water tank and an indoor heat exchange tail end, wherein the high-temperature water chilling unit is respectively connected with the indoor heat exchange tail end and the cold storage water tank through water supply branch pipes, the indoor heat exchange tail end and the cold storage water tank are respectively connected with the circulating water pump through water return branch pipes, a water supply and return passage is arranged between the cold storage water tank and the indoor heat exchange tail end, electromagnetic valves are respectively arranged on the water supply and return branch pipes, and the electromagnetic valves receive control signals from a controller and are used for controlling the on-off of a waterway;
the method comprises the following steps:
step one, predicting the time-by-time cooling load born by a next-day temperature control subsystem by using a support vector regression model;
step two, determining the theoretical cold accumulation amount of the cold accumulation water tank according to a predetermined demand response period and the predicted time-by-time cold load born by the temperature control subsystem;
checking theoretical cold accumulation amount and actual maximum cold accumulation amount of the cold accumulation water tank, evaluating feasibility of various operation schemes, and further determining an optimal operation scheme of a demand response period;
the step of determining the optimal operation scheme of the demand response period is specifically as follows:
if the actual maximum cold accumulation amount of the cold accumulation water tank can meet the theoretical cold accumulation amount, adopting a scheme A by a demand response period operation strategy; if the actual maximum cold accumulation amount of the cold accumulation water tank is close to but cannot meet the theoretical cold accumulation amount, calculating the cold release time length of the cold accumulation water tank, determining the early starting time of the high-temperature water chilling unit, and adopting a scheme B in a demand response time period operation strategy; if the actual maximum cold accumulation amount of the cold accumulation water tank cannot meet the theoretical cold accumulation amount and the early start-up time of the high-temperature water chilling unit is too long, adopting a scheme C as a demand response period operation strategy; if the actual maximum cold accumulation amount of the cold accumulation water tank cannot meet the theoretical cold accumulation amount and the possibility that the requirement of the demand response time period cannot be met still exists in consideration of taking the scheme C under the extremely severe weather condition, the demand response time period operation strategy takes the scheme D;
the scheme is as follows:
scheme a: the cold storage water tank is subjected to cold storage through the high-temperature water chilling unit in a non-occupied period, the stored cold quantity is theoretical cold storage quantity of the cold storage water tank, and the cold quantity required by the temperature control subsystem is provided through the cold storage water tank in a demand response period;
scheme B: the method comprises the steps that in a non-occupied period, cold storage is carried out on a cold storage water tank through a high-temperature water chilling unit, the stored cold quantity is the actual maximum cold storage quantity of the cold storage water tank, the difference value of cold release time, a demand response period and energy release time is calculated, the early starting time of the high-temperature water chilling unit is determined, and the cold quantity required by a temperature control subsystem is provided by the cold storage water tank and the high-temperature water chilling unit in sequence in the demand response period;
scheme C: the cold accumulation method comprises the steps of (1) in a non-occupied period, carrying out cold accumulation on a cold accumulation water tank through a high-temperature water chilling unit, wherein the stored cold quantity is the actual maximum cold accumulation quantity of the cold accumulation water tank, and improving the indoor set temperature in a demand response period based on an acceptable range of indoor heat comfort until the cold release duration of the cold accumulation water tank at the current indoor set temperature can meet the requirement of the demand response period, and providing the cold quantity required by a temperature control subsystem through the cold accumulation water tank in the demand response period;
scheme D: under extremely bad weather conditions, considering that the possibility that the requirement of the demand response time period still cannot be met after the scheme C is adopted, carrying out cold accumulation on the cold accumulation water tank through the high-temperature water chilling unit in a non-occupied time period, wherein the stored cold quantity is the actual maximum cold accumulation quantity of the cold accumulation water tank, taking the highest temperature as the indoor set temperature of the demand response time period within the indoor thermal comfort acceptable range, calculating the difference value of the cold release time period, the demand response time period and the cold release time period, determining the early starting time of the high-temperature water chilling unit, and providing the cold quantity required by the temperature control subsystem by the cold accumulation water tank and the high-temperature water chilling unit in the demand response time period;
optionally, the collecting related parameters in the first step includes historical time-by-time cooling load borne by the temperature control subsystem, outdoor meteorological parameters and indoor personnel equipment work and rest as input parameters, and the time-by-time cooling load borne by the next day temperature control subsystem is predicted through a support vector regression model.
Optionally, the theoretical cold accumulation amount of the cold accumulation water tank in the second step refers to the theoretical cold accumulation amount needed to be borne by the temperature control subsystem in the demand response period, and the calculation formula is as follows:
wherein: q (Q) i Theoretical cold accumulation amount for the cold accumulation water tank; q (Q) CL (t) is the predicted next day time-by-time cooling load;
t 1 starting time of the demand response time period; t is t 2 The time is the end time of the demand response period;
optionally, in the third step, the actual maximum cold storage amount of the cold storage water tank is limited by the effective volume of the cold storage water tank and the design working condition of the temperature control subsystem, and there is a case that the theoretical cold storage amount requirement cannot be met, and the theoretical cold storage amount and the actual maximum cold storage amount of the cold storage water tank need to be checked.
Optionally, in the third step, the actual maximum cold storage amount calculation formula of the cold storage water tank is as follows:
Q a ＝C p ρVΔT a η 1
wherein: q (Q) a The actual maximum cold accumulation amount of the cold accumulation water tank is; c (C) p Specific heat capacity of cold accumulation liquid in the cold accumulation water tank; ρ is the density of the liquid in the cold storage water tank; v is the effective volume of the cold accumulation water tank; delta T a The temperature difference of fluid at the inlet and the outlet of the cold accumulation water tank under the design working condition is set; η (eta) 1 The heat preservation efficiency of the cold accumulation water tank is improved; optionally, the cold-releasing time length of the cold-storage water tank in the third step is calculated as follows:
t d ＝(V/v)×(ΔT a /ΔT d )
wherein: t is t d The cold release time of the cold accumulation water tank is; v is the effective volume of the cold accumulation water tank; v is the volume flow of the chilled water when the cold accumulation water tank releases cold in the demand response period; delta Ta is the temperature difference of fluid at the inlet and the outlet of the cold accumulation water tank under the design working condition; Δtd is the temperature difference between the supply water and the return water at the indoor heat exchange end of the temperature control subsystem;
the refrigerating system with the control method comprises a controller, a humidity control subsystem and a temperature control subsystem; the humidity control subsystem comprises a water chilling unit, a circulating water pump and a dehumidifying fresh air unit; the temperature control subsystem comprises a high-temperature water chilling unit, a circulating water pump, a cold storage water tank and an indoor heat exchange tail end, wherein the high-temperature water chilling unit is respectively connected with the indoor heat exchange tail end and the cold storage water tank through water supply branch pipes, the indoor heat exchange tail end and the cold storage water tank are respectively connected with the circulating water pump through water return branch pipes, and a water supply and return passage is arranged between the cold storage water tank and the indoor heat exchange tail end; the water supply and return branch pipes are respectively provided with an electromagnetic valve, and the electromagnetic valves receive control signals from the controller and are used for controlling the on-off of the waterway.
Optionally, the indoor heat exchange end is a radiation suspended ceiling or a dry fan coil.
Optionally, chilled water provided by a chilled water unit in the humidity control subsystem is sent to a dehumidifying fresh air unit by a circulating water pump, the dehumidifying fresh air unit carries out freezing dehumidification on fresh air, and the fresh air is sent to an indoor room by a power device to bear all latent heat cold load and part of sensible heat cold load; chilled water provided by the high-temperature water chilling unit in the temperature control subsystem is respectively sent to the indoor heat exchange tail end and the cold accumulation water tank by the circulating water pump at different time periods based on control signals of the controller, and most sensible heat and cold loads in the room are borne.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the temperature and humidity independent control air conditioner demand response control method and the refrigerating system, the cold storage capacity is effectively reduced by combining the advantages of the temperature and humidity independent control system and the water cold storage system, the cold storage and the cold release of the cold storage water tank are effectively scheduled, the operation scheme of the air conditioner system in the demand response period is flexibly selected according to the relation between the actual maximum cold storage capacity of the cold storage water tank and the theoretical cold storage capacity on the premise that the thermal comfort is in the acceptable range of indoor personnel, the energy flexibility and the better controllability are ensured, the demand response potential of the water cold storage system is fully utilized, the power peak load can be reduced, the supply and demand current situation of a power grid is improved, and the operation energy consumption of the air conditioner system is reduced.
Drawings
FIG. 1 is a flow chart of an implementation of the method of the present invention;
FIG. 2 is a schematic diagram of a refrigeration system according to the present invention;
list of reference numerals:
1. a controller; 2. a water chiller; 3. dehumidifying fresh air unit; 4. a high-temperature water chiller; 5. cold-storage water tank; 6. an indoor heat exchange tail end; 7. a first electromagnetic valve; 8. a second electromagnetic valve; 9. a third electromagnetic valve; 10. a fourth electromagnetic valve; 11. a first circulating water pump; 12. a second circulating water pump; 13. and a third circulating water pump.
Detailed Description
The present invention is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the invention and not limiting the scope of the invention.
As shown in fig. 1, the present embodiment provides a method for controlling the response of the demand of an air conditioner by independently controlling the temperature and the humidity, the method includes the following steps:
step one, predicting the time-by-time cooling load born by a next-day temperature control subsystem by using a support vector regression model;
and predicting the time-by-time cold load born by the next-day temperature control subsystem by using a support vector regression model, wherein related parameters are required to be acquired, including the historical time-by-time cold load born by the temperature control subsystem, the outdoor air dry bulb temperature, the outdoor air relative humidity, the solar radiation intensity and the indoor personnel equipment work and rest as input parameters.
Step two, determining the theoretical cold accumulation amount of the cold accumulation water tank according to a predetermined demand response period and the predicted time-by-time cold load born by the temperature control subsystem;
the determination of the demand response time period needs to consider various factors, such as the peak electricity load time of the power grid in different regions and the market electricity price in different regions, including real-time electricity price, time-of-use electricity price and peak electricity price;
the theoretical cold accumulation amount of the cold accumulation water tank refers to the cold amount which is theoretically needed to be born by a temperature control subsystem in a demand response period;
the theoretical cold accumulation amount calculation formula of the cold accumulation water tank:
wherein: q (Q) i Theoretical cold accumulation amount for the cold accumulation water tank; q (Q) CL (t) is the predicted next day time-by-time cooling load;
t 1 starting time of the demand response time period; t is t 2 And the time is the end time of the demand response period.
Checking theoretical cold accumulation amount and actual maximum cold accumulation amount of the cold accumulation water tank, evaluating feasibility of various operation schemes, and further determining an optimal operation scheme of a demand response period;
the actual maximum cold accumulation amount of the cold accumulation water tank can not meet the requirement of the theoretical cold accumulation amount due to the limitation of the volume of the cold accumulation water tank and the operation working condition of the temperature control subsystem, so that the theoretical cold accumulation amount and the actual maximum cold accumulation amount of the cold accumulation water tank need to be checked, and an optimal operation scheme of a demand response period is determined according to the theoretical cold accumulation amount and the actual maximum cold accumulation amount;
the step of determining the optimal operation scheme of the demand response period is specifically as follows:
if the actual maximum cold accumulation amount of the cold accumulation water tank can meet the theoretical cold accumulation amount, adopting a scheme A by a demand response period operation strategy; if the actual maximum cold accumulation amount of the cold accumulation water tank is close to but cannot meet the theoretical cold accumulation amount, calculating the cold release time of the cold accumulation water tank, determining the early starting time of the high-temperature water chilling unit, and adopting a scheme B in a demand response period operation strategy; if the actual maximum cold accumulation amount of the cold accumulation water tank cannot meet the theoretical cold accumulation amount and the early start-up time of the high-temperature water chilling unit is too long, adopting a scheme C as a demand response period operation strategy; if the actual maximum cold accumulation amount of the cold accumulation water tank cannot meet the theoretical cold accumulation amount and the possibility that the requirement of the demand response time period cannot be met still exists in consideration of taking the scheme C under the extremely severe weather condition, the demand response time period operation strategy takes the scheme D;
through the steps, the operation scheme of the demand response period is reasonably selected according to different conditions, the starting time of the high-temperature water chilling unit in the demand response period is reduced as much as possible, and the demand response potential of the chilled water storage system is fully exerted.
The above schemes are as follows:
scheme a: the cold storage water tank is subjected to cold storage through the high-temperature water chilling unit in a non-occupied period, the stored cold energy is theoretical cold energy of the cold storage water tank, the electromagnetic valve of the water supply and return channel between the high-temperature water chilling unit and the indoor heat exchange tail end is closed in a demand response period, the electromagnetic valve on the water supply and return channel between the cold storage water tank and the indoor heat exchange tail end is opened, and the cold energy required by the temperature control subsystem is provided through the cold storage water tank;
scheme B: the method comprises the steps of (1) in a non-occupied period, carrying out cold accumulation on a cold accumulation water tank through a high-temperature water chilling unit, wherein the stored cold quantity is the actual maximum cold accumulation quantity of the cold accumulation water tank, calculating the difference value of energy release time, a demand response period and energy release time, determining the early starting time of the high-temperature water chilling unit, closing an electromagnetic valve on a water supply return passage between the cold accumulation water tank and an indoor heat exchange tail end at the time point, opening the electromagnetic valve of the water supply return passage between the high-temperature water chilling unit and the indoor heat exchange tail end, providing the residual required cold quantity of a temperature control subsystem through the high-temperature water chilling unit, and providing the required cold quantity of the temperature control subsystem through the cold accumulation water tank and the high-temperature water chilling unit in sequence in the demand response period;
scheme C: the method comprises the steps of (1) in a non-occupied period, carrying out cold accumulation on a cold accumulation water tank through a high-temperature water chilling unit, wherein the stored cold energy is the actual maximum cold accumulation amount of the cold accumulation water tank, and based on an acceptable range of indoor comfort, improving the indoor set temperature of a demand response period until the energy release duration of the cold accumulation water tank at the current indoor set temperature can meet the requirement of the demand response period, closing an electromagnetic valve of a water supply and return passage between the high-temperature water chilling unit and an indoor heat exchange terminal in the demand response period, opening the electromagnetic valve of the water supply and return passage between the cold accumulation water tank and the indoor heat exchange terminal, and providing the cold energy required by a temperature control subsystem through the cold accumulation water tank;
scheme D: under extremely bad weather conditions, considering that the possibility that the requirement of the demand response period still cannot be met exists after the scheme C is adopted, carrying out cold accumulation on a cold accumulation water tank through a high-temperature water chilling unit in a non-occupied period, wherein the stored cold quantity is the actual maximum cold accumulation quantity of the cold accumulation water tank, taking the highest temperature as the indoor set temperature of the demand response period within an indoor thermal comfort acceptable range, calculating the difference value of the cold release time, the demand response period and the cold release time, determining the early starting time of the high-temperature water chilling unit, closing an electromagnetic valve on a water supply return passage between the cold accumulation water tank and the indoor heat exchange end at the time point, opening the electromagnetic valve of the water supply return passage between the high-temperature water chilling unit and the indoor heat exchange end, providing the cold quantity required by the rest of a temperature control subsystem through the high-temperature water chilling unit, and providing the cold quantity required by the temperature control subsystem through the cold accumulation water tank and the high-temperature water chilling unit in the demand response period;
the actual maximum cold accumulation amount calculation formula of the cold accumulation water tank is as follows:
Q a ＝C p ρVΔT a η 1
wherein: q (Q) a The actual maximum cold accumulation amount of the cold accumulation water tank is; c (C) p Specific heat capacity of cold accumulation liquid in the cold accumulation water tank; ρ is the density of the liquid in the cold storage water tank; v is the effective volume of the cold accumulation water tank; delta T a The temperature difference of fluid at the inlet and the outlet of the cold accumulation water tank under the design working condition is set; η (eta) 1 The heat preservation efficiency of the cold accumulation water tank is achieved.
The cold release time length of the cold accumulation water tank is calculated as follows:
t d ＝(V/v)×(ΔT a /ΔT d )
wherein: t is t d The cold release time of the cold accumulation water tank is; v is the effective volume of the cold accumulation water tank; v is the volume flow of the chilled water when the cold accumulation water tank releases cold in the demand response period; delta Ta is the temperature difference of fluid at the inlet and the outlet of the cold accumulation water tank under the design working condition; ΔTd is the temperature difference of the supply and return water at the indoor heat exchange end of the temperature control subsystem.
As shown in fig. 2, the present invention provides a refrigeration system with the above control method, which includes a controller 1, a humidity control subsystem, and a temperature control subsystem; the humidity control subsystem comprises a water chilling unit 2, a first circulating water pump 11 and a dehumidifying fresh air handling unit 3; the temperature control subsystem comprises a high-temperature water chilling unit 4, a second circulating water pump 12, a third circulating water pump 13, a cold accumulation water tank 5 and an indoor heat exchange tail end 6.
The water chiller 2 is connected with the dehumidifying fresh air unit 3 through a water supply pipe, the dehumidifying fresh air unit 3 is connected with the first circulating water pump 11 through a water return pipe, and finally the chilled water flows back to the water chiller 2 to form the whole circulation of the water system of the humidity control subsystem; the dehumidifying fresh air unit 3 is connected with outdoor fresh air through a fresh air pipe, and is connected with the tail end of indoor air supply through an air supply pipe to form the whole circulation of an air system of the humidity control subsystem.
Chilled water provided by the chilled water unit 2 in the humidity control subsystem is sent to the dehumidifying fresh air unit 3 by the first circulating water pump 11, the dehumidifying fresh air unit 3 carries out freezing and dehumidifying on fresh air, and the fresh air is sent to an indoor room by a power device to bear all latent heat cold load and part of sensible heat cold load.
The high-temperature water chilling unit 4 is connected with the indoor heat exchange tail end 6 through a water supply branch pipe, the indoor heat exchange tail end 6 is connected with the second circulating water pump 12 through a water return branch pipe, and finally high-temperature chilled water flows back to the high-temperature water chilling unit 4 to form a water loop for cooling of a temperature control subsystem chiller; the high-temperature water chiller 4 is connected with the cold accumulation water tank 5 through a water supply branch pipe, the cold accumulation water tank 5 is connected with the second circulating water pump 12 through a water return branch pipe, and finally high-temperature chilled water flows back to the high-temperature water chiller 4 to form a water loop for cold accumulation of the temperature control subsystem; a water supply and return passage is arranged between the cold accumulation water tank 5 and the indoor heat exchange tail end 6, the cold accumulation water tank 5 is connected with the indoor heat exchange tail end 6 through a water supply pipe, the indoor heat exchange tail end 6 is connected with a third circulating water pump 13 through a water return pipe, and finally high-temperature chilled water flows back to the cold accumulation water tank 5 to form a cold accumulation water tank cold supply water loop of the temperature control subsystem; the water supply pipes of the water loop for cooling the temperature control subsystem cold machine, the water loop for cold storage of the temperature control subsystem cold machine and the water loop for cooling the temperature control subsystem cold storage water tank are respectively provided with a second electromagnetic valve 8, a third electromagnetic valve 9 and a fourth electromagnetic valve 10; the second electromagnetic valve 8, the third electromagnetic valve 9 and the fourth electromagnetic valve 10 receive control signals from the controller 1 and are used for controlling the on-off of the waterway.
Wherein the indoor heat exchange end 6 is a radiation ceiling or a dry fan coil.
The high-temperature chilled water provided by the high-temperature water chilling unit 4 in the temperature control subsystem is respectively sent to the indoor heat exchange tail end 6 and the cold accumulation water tank 5 at different time periods by the second circulating water pump 12 based on the control signal of the controller 1, and the sensible heat cooling load of most indoor parts is borne.
For example, when the optimal operation scheme of the demand response period is determined to be scheme a according to the above steps, the high-temperature water chiller 4 receives a control signal from the controller 1 in the unoccupied period, and sends high-temperature chilled water to the cold storage water tank 5 through the second circulating pump 12, and the stored cold energy is the theoretical cold storage energy of the cold storage water tank; the high-temperature water chiller 4 receives a control signal from the controller 1 at the initial time of the occupied time, sends high-temperature chilled water to the indoor heat exchange tail end 6 through the second circulating water pump 12, and bears most of indoor sensible heat and cold load from the initial time of the occupied time to the initial time of the demand response period; the cold accumulation water tank 5 receives a control signal from the controller 1 at the beginning time of the demand response period, and sends high-temperature chilled water to the indoor heat exchange tail end 6 through the third circulating water pump 13 to bear most of sensible heat cooling load in the room in the demand response period; the high-temperature water chiller 4 receives a control signal from the controller 1 at the end time of the demand response period, and sends high-temperature chilled water to the indoor heat exchange end 6 through the second circulating water pump 12, so as to bear most sensible heat and cold loads in the room from the end time of the demand response period to the end time of the occupied time.
One specific application scenario of the present invention is described in detail below:
taking an office building as an example, the system matched with the building is the refrigerating system, the indoor heat exchange end of the temperature control subsystem is a radiation suspended ceiling, the occupied period of working days is assumed to be 8:00-18:00, the demand response period is assumed to be 13:00-15:00, and the indoor initial set temperature of the occupied period is 25 ℃.
Step one, historical operation data of a temperature control subsystem are collected, wherein the historical operation data comprise high-temperature water chilling unit operation data, second circulating water pump operation data, third circulating water pump operation data, indoor set temperature of an air conditioning period, indoor actual temperature of the air conditioning period and indoor heat exchange tail end water supply and return temperature, outdoor weather parameters of corresponding periods are obtained through relevant weather websites, the parameters including outdoor air dry bulb temperature, outdoor air relative humidity and solar radiation intensity, indoor personnel equipment work and rest and the like can be obtained through work and rest tables fixed in an office building, the parameters are divided into a model training set and a model verification set according to time periods, a support vector regression load prediction model is constructed, and time-by-time cold load born by a next day temperature control subsystem is predicted by using the load prediction model.
And step two, determining the theoretical cold accumulation amount of the cold accumulation water tank according to a predetermined demand response period and the predicted time-by-time cold load born by the temperature control subsystem.
And thirdly, checking the theoretical cold accumulation amount and the actual maximum cold accumulation amount of the cold accumulation water tank, and determining an optimal operation scheme of the demand response period.
When the theoretical cold accumulation amount of the cold accumulation water tank is smaller than the actual maximum cold accumulation amount of the cold accumulation water tank, the operation scheme of the demand response period adopts a scheme A, the cold accumulation water tank is subjected to cold accumulation through the high-temperature water chilling unit in the unoccupied period, the stored cold amount is the theoretical cold accumulation amount of the cold accumulation water tank, and the stored cold amount is controlled to reach the theoretical cold accumulation amount of the cold accumulation water tank through the operation time of the high-temperature water chilling unit.
The scheme A specifically operates as follows: considering that the radiation suspended ceiling is easy to generate the dewing phenomenon in the initial stage of the refrigeration period, the working day occupies the previous hour of the period, namely 7:00, the water chilling unit, the first electromagnetic valve and the first circulating water pump receive control signals from the controller to freeze and dehumidify fresh air, and the fresh air is sent to the room by the power device to bear all latent heat cold load and part of sensible heat cold load in the room from 7:00 to 18:00. The working day occupies the starting moment of the period, namely 8:00, the high-temperature water chilling unit, the second electromagnetic valve and the second circulating water pump receive control signals from the controller, high-temperature chilled water is pumped to the radiation suspended ceiling through the second circulating water, and most sensible heat cold load in the room from 8:00 to 13:00 is borne, namely the starting moment of the occupied time to the starting moment of the demand response period is borne. The starting moment of the demand response period is 13:00, the high-temperature water chilling unit, the second circulating water pump and the second electromagnetic valve are closed, the fourth electromagnetic valve and the third circulating water pump are opened, the cold accumulation water tank pumps high-temperature chilled water to the radiation suspended ceiling through the third circulating water pump, and the sensible heat cooling load in the room of 13:00-15:00 is borne, namely, the sensible heat cooling load in the room of the demand response period is mostly. And when the demand response period is finished, namely 15:00, the fourth electromagnetic valve and the third circulating water pump are closed, the high-temperature water chilling unit, the second circulating water pump and the second electromagnetic valve are opened, and the high-temperature water chilling unit pumps high-temperature chilled water to the radiation suspended ceiling through the second circulating water to bear most sensible heat cooling load in the 15:00-18:00 room. And closing all the coolers, the electromagnetic valves and the water pumps at the end time of the occupied period, namely 18:00.
When the actual maximum cold accumulation amount of the cold accumulation water tank is close to but cannot meet the theoretical cold accumulation amount of the cold accumulation water tank under the influence of outdoor meteorological parameters, the operation scheme of the demand response period adopts the scheme B, the cold accumulation water tank is subjected to cold accumulation through the high-temperature water chilling unit in the unoccupied period, and the stored cold amount is the actual maximum cold accumulation amount of the cold accumulation water tank. And (3) obtaining the cold release time of the cold storage water tank through a cold release time calculation formula, and determining the early start time of the high-temperature water chilling unit, wherein the early start time is 0.2 hour if the cold release time is 1.8 hours.
The specific operation of the scheme B is as follows: considering that the radiation suspended ceiling is easy to generate the dewing phenomenon in the initial stage of the refrigeration period, the working day occupies the previous hour of the period, namely 7:00, the water chilling unit, the first electromagnetic valve and the first circulating water pump receive control signals from the controller to freeze and dehumidify fresh air, and the fresh air is sent to the room by the power device to bear all latent heat cold load and part of sensible heat cold load in the room from 7:00 to 18:00. The working day occupies the starting moment of the period, namely 8:00, the high-temperature water chilling unit, the second electromagnetic valve and the second circulating water pump receive control signals from the controller, high-temperature chilled water is pumped to the radiation suspended ceiling through the second circulating water, and most sensible heat cold load in the room from 8:00 to 13:00 is borne, namely the starting moment of the occupied time to the starting moment of the demand response period is borne. And at the beginning moment of the demand response period, namely 13:00, the high-temperature water chilling unit, the second circulating water pump and the second electromagnetic valve are closed, the fourth electromagnetic valve and the third circulating water pump are opened, the cold storage water tank pumps high-temperature chilled water to the radiation suspended ceiling through the third circulating water pump, and most sensible heat cooling load in the room of 13:00-14:48 is borne. 14:48, the fourth electromagnetic valve and the third circulating water pump are closed, the high-temperature water chilling unit, the second circulating water pump and the second electromagnetic valve are opened, and the high-temperature water chilling unit pumps high-temperature chilled water to the radiation suspended ceiling through the second circulating water to bear most sensible heat cooling load in the room 14:48-18:00. And closing all the coolers, the electromagnetic valves and the water pumps at the end time of the occupied period, namely 18:00.
Under the influence of outdoor meteorological parameters, when the actual maximum cold accumulation amount of the cold accumulation water tank cannot meet the theoretical cold accumulation amount of the cold accumulation water tank and the high-temperature water chilling unit is started in advance for too long, for example, the cold release time is 1 hour, the early start time is 1 hour, the cold release time accounts for half of the demand response time period, the demand response potential of the system cannot be fully utilized, the demand response time period operation scheme adopts a scheme C, the cold accumulation water tank is subjected to cold accumulation through the high-temperature water chilling unit in a non-occupied time period, and the stored cold is the actual maximum cold accumulation amount of the cold accumulation water tank. And (3) within the acceptable indoor thermal comfort range, the indoor set temperature in the next day of demand response time period is increased to 27 ℃, the cooling release time period is recalculated, and the demand of the demand response time period is met.
Scheme C operates as follows: considering that the radiation suspended ceiling is easy to generate the dewing phenomenon in the initial stage of the refrigeration period, the working day occupies the previous hour of the period, namely 7:00, the water chilling unit, the first electromagnetic valve and the first circulating water pump receive control signals from the controller to freeze and dehumidify fresh air, and the fresh air is sent to the room by the power device to bear all latent heat cold load and part of sensible heat cold load in the room from 7:00 to 18:00. The working day occupies the starting moment of the period, namely 8:00, the high-temperature water chilling unit, the second electromagnetic valve and the second circulating water pump receive control signals from the controller, high-temperature chilled water is pumped to the radiation suspended ceiling through the second circulating water, most sensible heat cold load in the room from 8:00 to 13:00 is borne, namely the time is occupied from the starting moment to the starting moment of the demand response period, and the room temperature is maintained at about 25 ℃. And at the beginning moment of the demand response period, namely 13:00, the high-temperature water chilling unit, the second circulating water pump and the second electromagnetic valve are closed, the fourth electromagnetic valve and the third circulating water pump are opened, the cold storage water tank pumps high-temperature chilled water to the radiation suspended ceiling through the third circulating water pump, and the cold storage water tank bears most sensible heat cooling load in the 13:00-15:00 room and maintains the room temperature at about 27 ℃.15:00, the fourth electromagnetic valve and the third circulating water pump are closed, the high-temperature water chilling unit, the second circulating water pump and the second electromagnetic valve are opened, the high-temperature water chilling unit pumps high-temperature chilled water to the radiation suspended ceiling through the second circulating water, and the high-temperature water chilling unit bears most sensible heat cooling load in 15:00-18:00 rooms and maintains the room temperature at about 25 ℃. And closing all the coolers, the electromagnetic valves and the water pumps at the end time of the occupied period, namely 18:00.
Under extremely severe weather conditions, the requirement of the demand response time period still cannot be met after the scheme C is adopted, the demand response time period operation scheme adopts the scheme D, the cold storage water tank is subjected to cold storage in the unoccupied time period through the high-temperature water chilling unit, and the stored cold quantity is the actual maximum cold storage quantity of the cold storage water tank. The indoor set temperature in the next day demand response period is increased to the highest temperature within the thermal comfort acceptable range, for example, 29 ℃, the cold-releasing time length of the cold storage water tank is obtained through a cold-releasing time length calculation formula, and the early start-up time of the high-temperature water chilling unit is determined, for example, the cold-releasing time length is 1.5 hours, and then the early start-up time is 0.5 hour.
The specific operation of scheme D is as follows: considering that the radiation suspended ceiling is easy to generate the dewing phenomenon in the initial stage of the refrigeration period, the working day occupies the previous hour of the period, namely 7:00, the water chilling unit, the first electromagnetic valve and the first circulating water pump receive control signals from the controller to freeze and dehumidify fresh air, and the fresh air is sent to the room by the power device to bear all latent heat cold load and part of sensible heat cold load in the room from 7:00 to 18:00. The working day occupies the starting moment of the period, namely 8:00, the high-temperature water chilling unit, the second electromagnetic valve and the second circulating water pump receive control signals from the controller, high-temperature chilled water is pumped to the radiation suspended ceiling through the second circulating water, most sensible heat cold load in the room from 8:00 to 13:00 is borne, namely the time is occupied from the starting moment to the starting moment of the demand response period, and the room temperature is maintained at about 25 ℃. And at the beginning moment of the demand response period, namely 13:00, the high-temperature water chilling unit, the second circulating water pump and the second electromagnetic valve are closed, the fourth electromagnetic valve and the third circulating water pump are opened, the cold storage water tank pumps high-temperature chilled water to the radiation suspended ceiling through the third circulating water pump, and the cold storage water tank bears most sensible heat cooling load in the 13:00-14:30 room and maintains the room temperature at about 29 ℃.14:30, closing a fourth electromagnetic valve and a third circulating water pump, opening a high-temperature water chilling unit, a second circulating water pump and the second electromagnetic valve, pumping high-temperature chilled water to the radiation suspended ceiling through the second circulating water by the high-temperature water chilling unit, bearing most sensible heat cooling load in a room of 14:30-18:00, and maintaining the room temperature at about 25 ℃. And closing all the coolers, the electromagnetic valves and the water pumps at the end time of the occupied period, namely 18:00.
The foregoing is merely illustrative embodiments of the present invention, and the present invention is not limited thereto, and any changes or substitutions that may be easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (7)
1. A temperature and humidity independent control air conditioner demand response control method is characterized in that: an air conditioner refrigerating system with independent temperature and humidity control is adopted, and comprises a controller, a humidity control subsystem and a temperature control subsystem; the humidity control subsystem comprises a water chilling unit, a circulating water pump and a dehumidifying fresh air unit; the temperature control subsystem comprises a high-temperature water chilling unit, a circulating water pump, a cold storage water tank and an indoor heat exchange tail end; the high-temperature water chilling unit is respectively connected with the indoor heat exchange tail end and the cold accumulation water tank through water supply branch pipes, the indoor heat exchange tail end and the cold accumulation water tank are respectively connected with the circulating water pump through water return branch pipes, a water supply and return passage is additionally arranged between the cold accumulation water tank and the indoor heat exchange tail end, electromagnetic valves are respectively arranged on the water supply and return passages, and the electromagnetic valves receive control signals from the controller and are used for controlling the on-off of the waterway; the method specifically comprises the following steps:
step one, predicting the time-by-time cooling load born by a next-day temperature control subsystem by using a support vector regression model;
step two, determining the theoretical cold accumulation amount of the cold accumulation water tank according to a predetermined demand response period and the predicted time-by-time cold load born by the temperature control subsystem;
the theoretical cold accumulation amount of the cold accumulation water tank in the second step refers to the theoretical cold accumulation amount needed to be born by the temperature control subsystem in the demand response period, and the calculation formula is as follows:
wherein Q is i For the theoretical cold accumulation amount of the cold accumulation water tank, Q CL (t) is the predicted time-by-time cooling load of the next day, t 1 For the start time of the demand response period, t 2 The time is the end time of the demand response period;
checking theoretical cold accumulation amount and actual maximum cold accumulation amount of the cold accumulation water tank, evaluating feasibility of various operation schemes, and further determining an optimal operation scheme of a demand response period; the step of determining the optimal operation scheme of the demand response time period is specifically as follows:
if the actual maximum cold accumulation amount of the cold accumulation water tank can meet the theoretical cold accumulation amount, adopting a scheme A by a demand response period operation strategy; the scheme A specifically comprises the following steps: the cold storage water tank is subjected to cold storage through the high-temperature water chilling unit in a non-occupied period, the stored cold quantity is theoretical cold storage quantity of the cold storage water tank, and the cold quantity required by the temperature control subsystem is provided through the cold storage water tank in a demand response period;
if the actual maximum cold accumulation amount of the cold accumulation water tank is close to but cannot meet the theoretical cold accumulation amount, calculating the cold release time length of the cold accumulation water tank, determining the early starting time of the high-temperature water chilling unit, and adopting a scheme B in a demand response time period operation strategy; the scheme B is specifically as follows: the cold storage water tank is subjected to cold storage through the high-temperature water chiller in a non-occupied period, the stored cold quantity is the actual maximum cold storage quantity of the cold storage water tank, the cold release time length, the difference value of the demand response period and the cold release time length are calculated, the early starting time of the high-temperature water chiller is determined, and the cold quantity required by the temperature control subsystem is provided by the cold storage water tank and the high-temperature water chiller in the demand response period;
if the actual maximum cold accumulation amount of the cold accumulation water tank cannot meet the theoretical cold accumulation amount and the early start-up time of the high-temperature water chilling unit is too long, adopting a scheme C as a demand response period operation strategy; scheme C is specifically: the cold accumulation method comprises the steps of (1) in a non-occupied period, carrying out cold accumulation on a cold accumulation water tank through a high-temperature water chilling unit, wherein the stored cold quantity is the actual maximum cold accumulation quantity of the cold accumulation water tank, and improving the indoor set temperature in a demand response period based on an acceptable range of indoor heat comfort until the cold release duration of the cold accumulation water tank at the current indoor set temperature can meet the requirement of the demand response period, and providing the cold quantity required by a temperature control subsystem through the cold accumulation water tank in the demand response period;
if the actual maximum cold accumulation amount of the cold accumulation water tank cannot meet the theoretical cold accumulation amount and the possibility that the requirement of the demand response time period cannot be met still exists in consideration of taking the scheme C under the extremely severe weather condition, the demand response time period operation strategy takes the scheme D; the scheme D specifically comprises the following steps: and in the unoccupied period, cold storage is carried out on the cold storage water tank through the high-temperature water chilling unit, the stored cold quantity is the actual maximum cold storage quantity of the cold storage water tank, in the indoor thermal comfort acceptable range, the highest temperature is taken as the indoor set temperature of the demand response period, the difference value of the cold release duration, the demand response period and the cold release duration is calculated, the early starting time of the high-temperature water chilling unit is determined, and the cold quantity required by the temperature control subsystem is provided by the cold storage water tank and the high-temperature water chilling unit in the demand response period.
2. The method for controlling the demand response of the temperature and humidity independent control air conditioner according to claim 1, wherein the step one is characterized in that the collection of related parameters comprises historical time-by-time cooling load born by a temperature control subsystem, outdoor meteorological parameters and indoor personnel equipment work and rest as input parameters, and the time-by-time cooling load born by the next day temperature control subsystem is predicted through a support vector regression model.
3. The method for controlling the demand response of the temperature and humidity independent control air conditioner according to claim 1, wherein in the third step, the actual maximum cold accumulation amount of the cold accumulation water tank is limited by the effective volume of the cold accumulation water tank and the design working condition of the temperature control subsystem, and the theoretical cold accumulation amount and the actual maximum cold accumulation amount of the cold accumulation water tank need to be checked under the condition that the theoretical cold accumulation amount requirement cannot be met.
4. The method for controlling the demand response of an air conditioner with independent temperature and humidity control according to claim 1, wherein the actual maximum cold storage amount calculation formula of the cold storage water tank in the third step is as follows:
Q a ＝C p ρVΔT a η 1
wherein Q is a C for the actual maximum cold accumulation amount of the cold accumulation water tank p For the specific heat capacity of the cold storage liquid in the cold storage water tank, ρ is the density of the liquid in the cold storage water tank, V is the effective volume of the cold storage water tank, and DeltaT a For the temperature difference eta of the inlet and outlet fluid of the cold accumulation water tank under the design working condition 1 For accumulatingThe heat preservation efficiency of the cold water tank.
5. The method for controlling the demand response of an air conditioner with independent temperature and humidity control according to claim 1, wherein the cold-releasing time length of the cold-storage water tank in the third step is calculated as follows:
t d ＝(V/v)×(ΔT a /ΔT d )
wherein t is d For the cold release time of the cold storage water tank, V is the effective volume of the cold storage water tank, V is the volume flow of the frozen water when the cold storage water tank releases cold in the demand response time period, and delta T a For the temperature difference of the inlet and outlet fluid of the cold accumulation water tank under the design working condition, delta T d The temperature difference of the water supply and return at the indoor heat exchange end of the temperature control subsystem.
6. The temperature and humidity independent control air conditioner demand response control method according to claim 1, wherein the method comprises the following steps: the indoor heat exchange end is a radiation suspended ceiling or a dry fan coil.
7. The temperature and humidity independent control air conditioner demand response control method according to claim 1, wherein the method comprises the following steps: chilled water provided by a chilled water unit in the humidity control subsystem is sent to a dehumidifying fresh air unit by a circulating water pump, the dehumidifying fresh air unit carries out freezing dehumidification on fresh air, and the fresh air is sent to an indoor room by a power device to bear all latent heat cold load and part of sensible heat cold load; chilled water provided by the high-temperature water chilling unit in the temperature control subsystem is respectively sent to the indoor heat exchange tail end and the cold accumulation water tank by the circulating water pump at different time periods based on control signals of the controller, and most sensible heat and cold loads in the room are borne.
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