A method and system for heat recovery cycle based on energy consumption monitoring

Abstract

The application claims a kind of cold and heat recovery cycle method and system based on energy consumption monitoring, by reading, collecting, storing the relevant data of air conditioning unit system and domestic hot water unit system operation, establishing the functional relationship of outdoor temperature and air conditioning unit power consumption and the functional relationship of outdoor temperature and air conditioning unit refrigerating capacity, obtaining the water consumption of domestic hot water;Control the flow of air conditioning cooling tower circulating pump, adjust the water temperature of standard condenser by adjusting the water quantity into cooling tower, adjust the heat recovery water temperature;Control the start and stop of hot water system air energy heat pump unit and heat pump circulating pump, control the time required for air energy heat pump unit and heat pump circulating pump to operate, ensure that domestic hot water is heated to the required temperature for use.The application can obtain the best energy consumption operating condition of air conditioning condensing heat recovery system, and adjust the system to run in the high efficiency area of best energy consumption, avoid the conventional condensing heat recovery that cannot be self-adaptive adjusted according to the air conditioning unit refrigerating capacity and domestic hot water consumption.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and in particular to a cooling and heating recovery cycle method and system based on energy consumption monitoring. Background Technology

[0002] Energy is the primary material foundation for the survival and development of human society. Fossil fuels are becoming increasingly scarce and will eventually be depleted, making energy conservation and the development of renewable energy imperative. Air conditioning chillers generate a significant amount of condensation heat while providing cooling, which is typically released into the atmosphere through cooling towers. Recovering this condensation heat during air conditioning use within buildings not only saves energy but also reduces atmospheric emissions, achieving energy conservation and emission reduction. However, conventional condensation heat recovery cannot be adjusted according to the cooling capacity of the air conditioning unit and the usage of domestic hot water. Because the cooling capacity of air conditioning units and the usage of domestic hot water in some buildings vary considerably across different seasons and times of day, the condensation heat recovery process operates outside its efficient range, leading to increased overall system energy consumption.

[0003] Conventional air conditioning condensate heat recovery systems cannot adjust their operating conditions according to the cooling capacity and domestic hot water consumption of the air conditioning units. This results in some building condensate heat recovery systems operating outside their high-efficiency range due to significant variations in the cooling capacity and domestic hot water consumption of the air conditioning units, leading to persistently high total system energy consumption, which does not conform to the principles of low-carbon and energy-saving practices. Summary of the Invention

[0004] According to a first aspect of the present invention, the present invention claims protection for a cold and heat recovery cycle method based on energy consumption monitoring, characterized in that it comprises:

[0005] Read, collect, and store relevant data on the operation of the air conditioning unit system, and establish functional relationships between outdoor temperature and power consumption of the air conditioning unit and between outdoor temperature and cooling capacity of the air conditioning unit;

[0006] Read, collect, and store relevant data on the operation of the domestic hot water unit system to obtain information on domestic hot water consumption;

[0007] Control the flow rate of the air conditioning cooling tower circulating pump, adjust the water temperature of the standard condenser by adjusting the amount of water entering the cooling tower, and regulate the heat recovery water temperature;

[0008] Control the start and stop of the air source heat pump unit and heat pump circulation pump in the hot water system, and control the running time of the air source heat pump unit and heat pump circulation pump to ensure that the domestic hot water is heated to the required temperature.

[0009] Furthermore, the process of reading, collecting, and storing relevant data on the operation of the air conditioning unit system, and establishing functional relationships between outdoor temperature and the power consumption of the air conditioning unit, and between outdoor temperature and the cooling capacity of the air conditioning unit, also includes:

[0010] The sources of relevant data for the operation of the air conditioning unit system include at least thermometers, power meters for the air conditioning unit, flow sensors for the air conditioning cooling tower circulating pump, and temperature sensors on the outlet pipe of the heat recovery condenser.

[0011] Within the pre-designed building, the cooling capacity required for air conditioning operation is mainly related to the outdoor temperature. Without condensation heat recovery, the outdoor temperature is monitored by a thermometer, and the power consumption of the air conditioning unit is monitored by the power meter supplying the air conditioning unit.

[0012] Establish a functional relationship between outdoor temperature and power consumption of air conditioning unit, and then establish a functional relationship between outdoor temperature and cooling capacity of air conditioning unit through the relationship between cooling capacity and power consumption;

[0013] The flow sensor of the air conditioning cooling tower circulating pump provides real-time feedback on the amount of water entering the air conditioning cooling tower, providing basic data for adjusting the flow rate of the circulating pump.

[0014] Furthermore, the process of reading, collecting, and storing relevant data on the operation of the domestic hot water unit system and obtaining information on domestic hot water consumption also includes:

[0015] The sources of relevant data for the operation of the domestic hot water unit system include at least the water meter installed on the hot water tank supply pipe, the power meter for the domestic hot water heat pump unit, and the flow sensor for the circulating pump of the air source heat pump unit.

[0016] The amount of water added to the hot water tank at different times is read by the water meter installed on the hot water tank supply pipe to determine the amount of domestic hot water used.

[0017] The power consumption of the heat pump unit is monitored by the power meter of the domestic hot water heat pump unit, and the flow sensor of the air source heat pump unit's circulating pump provides real-time feedback on the amount of water entering the air source heat pump unit for heating, providing basic data for adjusting the flow rate of the air source heat pump unit's circulating pump.

[0018] Furthermore, the method of controlling the flow rate of the air conditioning cooling tower circulating pump, adjusting the water volume entering the cooling tower, adjusting the water temperature of the standard condenser, and regulating the heat recovery water temperature also includes:

[0019] The functional relationship between the total energy consumption of the air conditioning unit operation and domestic hot water preparation and the preheating temperature of the air conditioning unit's condensing heat recovery is obtained under different outdoor temperatures. The optimal value of the preheating temperature of the air conditioning unit's condensing heat recovery is calculated under different outdoor temperatures, that is, the value of the preheating temperature of the condensing heat recovery corresponding to the minimum total energy consumption of the system.

[0020] The flow rate of the air conditioning cooling tower circulation pump is controlled to adjust the amount of water entering the cooling tower, thereby regulating the water temperature of the standard condenser. The temperature is monitored in real time by a temperature sensor to adjust the condensing heat recovery water temperature of the air conditioning unit to the optimal temperature.

[0021] Furthermore, the control of the start-up and shutdown of the air source heat pump unit and the heat pump circulation pump in the hot water system, and the control of the required operating time of the air source heat pump unit and the heat pump circulation pump to ensure that domestic hot water is heated to the required temperature, also includes:

[0022] When the condensing heat recovery water temperature of the air conditioning unit is at the optimal water temperature, the required operating time of the air source heat pump unit and the heat pump circulation pump is obtained to ensure that the domestic hot water is heated to the required temperature for use.

[0023] When the condensing heat recovery temperature of the air conditioner is high, the air source heat pump unit has a short start-up time and provides less heat.

[0024] When the condensing heat recovery temperature of the air conditioner is low, the air source heat pump unit has a longer start-up time and provides more heat, achieving the goal of minimum energy consumption and minimum carbon emissions while meeting the domestic hot water supply requirements.

[0025] According to a second aspect of the present invention, the present invention claims protection for a cold and heat recovery cycle system based on energy consumption monitoring, characterized in that it comprises: an air conditioning unit data collection unit, a domestic hot water unit data collection unit, an air conditioning unit control unit, and a domestic hot water unit control unit;

[0026] The air conditioning unit data collection unit includes an air conditioning unit power consumption monitoring module and an air conditioning cooling tower circulating pump flow monitoring module.

[0027] The domestic hot water unit data collection unit includes a hot water tank replenishment monitoring module, a domestic hot water air source heat pump unit power consumption monitoring module, and an air source heat pump unit circulating pump flow monitoring module.

[0028] The air conditioning unit control unit includes an air conditioning cooling tower circulating pump flow control module;

[0029] The control unit for the domestic hot water unit includes a hot water system air source heat pump start-stop control module and an air source heat pump circulation pump start-stop control module.

[0030] The air conditioning unit data collection unit reads, collects, and stores relevant data on the operation of the air conditioning unit system, and establishes a functional relationship between outdoor temperature and the power consumption of the air conditioning unit and a functional relationship between outdoor temperature and the cooling capacity of the air conditioning unit.

[0031] The domestic hot water unit data collection unit reads, collects, and stores relevant data on the operation of the domestic hot water unit system to obtain information on the domestic hot water consumption.

[0032] The air conditioning unit control unit controls the flow rate of the air conditioning cooling tower circulating pump, and adjusts the water temperature of the standard condenser by adjusting the amount of water entering the cooling tower, thereby regulating the heat recovery water temperature.

[0033] The domestic hot water unit control unit controls the start and stop of the air source heat pump unit and the heat pump circulation pump in the hot water system, and controls the running time of the air source heat pump unit and the heat pump circulation pump to ensure that the domestic hot water is heated to the required temperature.

[0034] Furthermore, the air conditioning unit data collection unit also includes:

[0035] The sources of relevant data for the operation of the air conditioning unit system include at least thermometers, power meters for the air conditioning unit, flow sensors for the air conditioning cooling tower circulating pump, and temperature sensors on the outlet pipe of the heat recovery condenser.

[0036] Within the pre-designed building, the cooling capacity required for air conditioning operation is mainly related to the outdoor temperature. Without condensation heat recovery, the outdoor temperature is monitored by a thermometer, and the power consumption of the air conditioning unit is monitored by the power meter supplying the air conditioning unit.

[0037] Establish a functional relationship between outdoor temperature and power consumption of air conditioning unit, and then establish a functional relationship between outdoor temperature and cooling capacity of air conditioning unit through the relationship between cooling capacity and power consumption;

[0038] The flow sensor of the air conditioning cooling tower circulating pump provides real-time feedback on the amount of water entering the air conditioning cooling tower, providing basic data for adjusting the flow rate of the circulating pump.

[0039] Furthermore, the domestic hot water unit data collection unit also includes:

[0040] The sources of relevant data for the operation of the domestic hot water unit system include at least the water meter installed on the hot water tank supply pipe, the power meter for the domestic hot water heat pump unit, and the flow sensor for the circulating pump of the air source heat pump unit.

[0041] The amount of water added to the hot water tank at different times is read by the water meter installed on the hot water tank supply pipe to determine the amount of domestic hot water used.

[0042] The power consumption of the heat pump unit is monitored by the power meter of the domestic hot water heat pump unit, and the flow sensor of the air source heat pump unit's circulating pump provides real-time feedback on the amount of water entering the air source heat pump unit for heating, providing basic data for adjusting the flow rate of the air source heat pump unit's circulating pump.

[0043] Furthermore, the air conditioning unit control unit also includes:

[0044] The functional relationship between the total energy consumption of the air conditioning unit operation and domestic hot water preparation and the preheating temperature of the air conditioning unit's condensing heat recovery is obtained under different outdoor temperatures. The optimal value of the preheating temperature of the air conditioning unit's condensing heat recovery is calculated under different outdoor temperatures, that is, the value of the preheating temperature of the condensing heat recovery corresponding to the minimum total energy consumption of the system.

[0045] The flow rate of the air conditioning cooling tower circulation pump is controlled to adjust the amount of water entering the cooling tower, thereby regulating the water temperature of the standard condenser. The temperature is monitored in real time by a temperature sensor to adjust the condensing heat recovery water temperature of the air conditioning unit to the optimal temperature.

[0046] Furthermore, the domestic hot water unit control unit also includes:

[0047] When the condensing heat recovery water temperature of the air conditioning unit is at the optimal water temperature, the required operating time of the air source heat pump unit and the heat pump circulation pump is obtained to ensure that the domestic hot water is heated to the required temperature for use.

[0048] When the condensing heat recovery temperature of the air conditioner is high, the air source heat pump unit has a short start-up time and provides less heat.

[0049] When the condensing heat recovery temperature of the air conditioner is low, the air source heat pump unit has a longer start-up time and provides more heat, achieving the goal of minimum energy consumption and minimum carbon emissions while meeting the domestic hot water supply requirements.

[0050] This invention claims protection for a heat recovery cycle method and system based on energy consumption monitoring. By reading, collecting, and storing relevant operational data from the air conditioning unit system and the domestic hot water unit system, it establishes functional relationships between outdoor temperature and air conditioning unit power consumption, and between outdoor temperature and air conditioning unit cooling capacity, thereby obtaining information on domestic hot water consumption. It controls the flow rate of the air conditioning cooling tower circulation pump, and adjusts the water temperature of the standard condenser by regulating the amount of water entering the cooling tower, thus regulating the heat recovery water temperature. It also controls the start and stop of the air source heat pump unit and the heat pump circulation pump in the hot water system, and controls the required operating time of the air source heat pump unit and the heat pump circulation pump to ensure that domestic hot water is heated to the required temperature. This invention can obtain the overall optimal energy consumption operating conditions of the air conditioning condensing heat recovery system and adjust the system to operate in the high-efficiency zone of optimal energy consumption, avoiding the inability of conventional condensing heat recovery to adaptively adjust according to the air conditioning unit cooling capacity and domestic hot water consumption. Attached Figure Description

[0051] Figure 1 This is a flowchart illustrating a cold and heat recovery cycle method based on energy consumption monitoring, as described in an embodiment of the present invention.

[0052] Figure 2 This is a modular structure diagram of a cold and heat recovery cycle system based on energy consumption monitoring, as described in an embodiment of the present invention.

[0053] Figure 3 This is a structural diagram of an air conditioning condensing heat recovery system based on energy consumption monitoring and a cold and heat recovery cycle system according to an embodiment of the present invention;

[0054] Figure 4This is a control flowchart of an air conditioning condensing heat recovery system based on energy consumption monitoring and a cold and heat recovery cycle system according to an embodiment of the present invention;

[0055] Figure label:

[0056] 1-Air conditioning unit chilled water circulation pump; 2-Air conditioning unit compressor; 3-Air conditioning unit evaporator; 4-Air conditioning unit standard condenser; 5-Air conditioning unit heat recovery condenser; 6-Cooling tower circulation pump; 7-Temperature sensor; 8-Condensation heat recovery circulation pump; 9-Cooling tower; 10-Preheat water tank; 11-Domestic hot water tank; 12-Domestic hot water supply circulation pump; 13-Air source heat pump circulation pump; 14-Air source heat pump unit; 15-Central controller; 16-Air conditioning unit power supply meter; 17-Atmospheric thermometer; 18-Air source heat pump unit power supply meter; 19-Tap water makeup meter. Detailed Implementation

[0057] According to a first embodiment of the present invention, referring to the appendix Figure 1 This invention claims protection for a cold and heat recovery cycle method based on energy consumption monitoring, characterized in that it includes:

[0058] Read, collect, and store relevant data on the operation of the air conditioning unit system, and establish functional relationships between outdoor temperature and power consumption of the air conditioning unit and between outdoor temperature and cooling capacity of the air conditioning unit;

[0059] Read, collect, and store relevant data on the operation of the domestic hot water unit system to obtain information on domestic hot water consumption;

[0060] Control the flow rate of the air conditioning cooling tower circulating pump, adjust the water temperature of the standard condenser by adjusting the amount of water entering the cooling tower, and regulate the heat recovery water temperature;

[0061] Control the start and stop of the air source heat pump unit and heat pump circulation pump in the hot water system, and control the running time of the air source heat pump unit and heat pump circulation pump to ensure that the domestic hot water is heated to the required temperature.

[0062] Furthermore, reading, collecting, and storing relevant data on the operation of the air conditioning unit system, establishing functional relationships between outdoor temperature and the power consumption of the air conditioning unit, and between outdoor temperature and the cooling capacity of the air conditioning unit, also includes:

[0063] The sources of relevant data for the operation of the air conditioning unit system include at least thermometers, power meters for the air conditioning unit, flow sensors for the circulating pumps of the air conditioning cooling tower, and temperature sensors on the outlet pipes of the heat recovery condenser.

[0064] Within the pre-designed building, the cooling capacity required for air conditioning operation is mainly related to the outdoor temperature. Without condensation heat recovery, the outdoor temperature is monitored by a thermometer, and the power consumption of the air conditioning unit is monitored by the power meter supplying the air conditioning unit.

[0065] Establish a functional relationship between outdoor temperature and power consumption of air conditioning unit, and then establish a functional relationship between outdoor temperature and cooling capacity of air conditioning unit through the relationship between cooling capacity and power consumption;

[0066] The flow sensor of the air conditioning cooling tower circulating pump provides real-time feedback on the amount of water entering the air conditioning cooling tower, providing basic data for adjusting the flow rate of the circulating pump.

[0067] Furthermore, reading, collecting, and storing relevant data on the operation of the domestic hot water unit system, and obtaining information on domestic hot water consumption, also includes:

[0068] The sources of relevant data for the operation of the domestic hot water unit system include at least the water meter installed on the hot water tank supply pipe, the power meter for the domestic hot water heat pump unit, and the flow sensor for the circulating pump of the air source heat pump unit.

[0069] The amount of water added to the hot water tank at different times is read by the water meter installed on the hot water tank supply pipe to determine the amount of domestic hot water used.

[0070] The power consumption of the heat pump unit is monitored by the power meter of the domestic hot water heat pump unit, and the flow sensor of the air source heat pump unit's circulating pump provides real-time feedback on the amount of water entering the air source heat pump unit for heating, providing basic data for adjusting the flow rate of the air source heat pump unit's circulating pump.

[0071] In this embodiment, the system monitoring and control logic is as follows:

[0072] Collect and determine basic data, including the average efficiency of air source heat pumps, domestic hot water distribution efficiency, and the functional relationship between the air conditioning cooling performance coefficient and the heat recovery outlet water temperature (hot water preheating temperature): COP 热水热泵 =f(t) 预热 ).

[0073] Based on the basic data collected by the air conditioning unit data collection unit, a functional relationship between the building's outdoor temperature and the air conditioning unit's cooling capacity is fitted: Q 制冷 =g(t) 室外气温 );

[0074] The total energy consumption W for air conditioning unit operation and domestic hot water preparation is:

[0075]

[0076] In the formula:

[0077] W 空调 —Daily power consumption of the air conditioning unit (kWh / d);

[0078] W 热水 —Daily energy consumption of air source heat pump unit (kWh / d);

[0079] Q 制冷 — Cooling capacity of the air conditioning unit (kW);

[0080] COP 空调 —Coefficient of performance (kW / kW) of air conditioning units;

[0081] t 室外气温 —Outdoor air temperature (°C)

[0082] T – Number of hours the air conditioner operates per day (h);

[0083] Q d —Daily heat consumption for domestic hot water preparation (kJ / d);

[0084] η r —Domestic hot water distribution efficiency, including the energy consumption of hot water system distribution, pipeline heat loss, and heat loss from secondary circulation and storage of domestic hot water (%).

[0085] COP 热水热泵 —Average efficiency (%) of air source heat pumps for domestic hot water systems

[0086] q r —Hot water usage quota (L / person·time);

[0087] c—Specific heat of water, c=4.187kJ / (kg·℃);

[0088] ρ r —Hot water density (kg / L), 0.987 kg / L;

[0089] t r —Hot water temperature (°C), t r =60℃;

[0090] t L —Cold water temperature (°C), i.e., the water temperature after preheating via the condensing heat recovery system of the air conditioning unit, t L =t 预热 ;

[0091] m — Number of water usage units (person-times);

[0092] 3600 — Conversion factor between kJ and kWh

[0093] V 热水 —Hot water consumption (L);

[0094] In this formula, the domestic hot water distribution efficiency η r Based on the scale of the hot water pipe network and the use of insulation materials, empirical values ​​are taken for the average efficiency (COP) of air source heat pumps in domestic hot water systems. 热水热泵Provided by the air source heat pump equipment manufacturer, the daily operating hours of the air conditioning unit are determined based on the actual usage of the building. Therefore, when applying this formula to specific building projects, the total energy consumption W of the air conditioning unit operation and domestic hot water preparation can be simplified to a value related to the outdoor air temperature t. 室外气温 Hot water consumption V 热水 and the preheating water temperature of the air conditioning unit's condensing heat recovery 预热 The functional relationship, i.e.

[0095] W = h(t) 室外气温 V 热水 ,t 预热 );

[0096] Furthermore, controlling the flow rate of the air conditioning cooling tower circulating pump, adjusting the water volume entering the cooling tower, regulating the water temperature of the standard condenser, and adjusting the heat recovery water temperature also includes:

[0097] The functional relationship between the total energy consumption of the air conditioning unit operation and domestic hot water preparation and the preheating temperature of the air conditioning unit's condensing heat recovery is obtained under different outdoor temperatures. The optimal value of the preheating temperature of the air conditioning unit's condensing heat recovery is calculated under different outdoor temperatures, that is, the value of the preheating temperature of the condensing heat recovery corresponding to the minimum total energy consumption of the system.

[0098] The flow rate of the air conditioning cooling tower circulation pump is controlled to adjust the amount of water entering the cooling tower, thereby regulating the water temperature of the standard condenser. The temperature is monitored in real time by a temperature sensor to adjust the condensing heat recovery water temperature of the air conditioning unit to the optimal temperature.

[0099] In this embodiment, during actual operation, the outdoor atmospheric temperature t 室外气温 Hot water consumption V 热水 Both can be obtained through measurement. Therefore, by pre-setting this functional relationship in the control module, the outdoor atmospheric temperature t can be used in actual operation. 室外气温 and hot water consumption V 热水 After substituting the values, the system automatically solves for the minimum total energy consumption W of the system under this operating condition, corresponding to the preheating water temperature t of the air conditioning unit's condensing heat recovery. 预热最佳 .

[0100] Furthermore, controlling the start and stop of the air source heat pump unit and heat pump circulation pump in the hot water system, and controlling the required operating time of the air source heat pump unit and heat pump circulation pump to ensure that domestic hot water is heated to the required temperature, also includes:

[0101] When the condensing heat recovery water temperature of the air conditioning unit is at the optimal water temperature, the required operating time of the air source heat pump unit and the heat pump circulation pump is obtained to ensure that the domestic hot water is heated to the required temperature for use.

[0102] When the condensing heat recovery temperature of the air conditioner is high, the air source heat pump unit has a short start-up time and provides less heat.

[0103] When the condensing heat recovery temperature of the air conditioner is low, the air source heat pump unit has a longer start-up time and provides more heat, achieving the goal of minimum energy consumption and minimum carbon emissions while meeting the domestic hot water supply requirements.

[0104] According to a second embodiment of the present invention, referring to the appendix Figure 2 This invention claims protection for a cold and heat recovery cycle system based on energy consumption monitoring, characterized in that it includes: an air conditioning unit data collection unit, a domestic hot water unit data collection unit, an air conditioning unit control unit, and a domestic hot water unit control unit;

[0105] The air conditioning unit data collection unit includes an air conditioning unit power consumption monitoring module and an air conditioning cooling tower circulating pump flow monitoring module;

[0106] The data collection unit for domestic hot water units includes a hot water tank replenishment monitoring module, a domestic hot water air source heat pump unit power consumption monitoring module, and an air source heat pump unit circulating pump flow monitoring module.

[0107] The air conditioning unit control unit includes an air conditioning cooling tower circulating pump flow control module;

[0108] The control unit for domestic hot water units includes a hot water system air source heat pump start-stop control module and an air source heat pump circulation pump start-stop control module;

[0109] The air conditioning unit data collection unit reads, collects, and stores relevant data on the operation of the air conditioning unit system, and establishes the functional relationship between outdoor temperature and the power consumption of the air conditioning unit and the functional relationship between outdoor temperature and the cooling capacity of the air conditioning unit.

[0110] The domestic hot water unit data collection unit reads, collects, and stores relevant data on the operation of the domestic hot water unit system to obtain information on domestic hot water consumption.

[0111] The air conditioning unit control unit controls the flow rate of the air conditioning cooling tower circulating pump, and adjusts the water temperature of the standard condenser by regulating the amount of water entering the cooling tower, thereby regulating the heat recovery water temperature.

[0112] The domestic hot water unit control unit controls the start and stop of the air source heat pump unit and the heat pump circulation pump in the hot water system, and controls the running time of the air source heat pump unit and the heat pump circulation pump to ensure that the domestic hot water is heated to the required temperature.

[0113] Furthermore, the air conditioning unit data collection unit also includes:

[0114] The sources of relevant data for the operation of the air conditioning unit system include at least thermometers, power meters for the air conditioning unit, flow sensors for the circulating pumps of the air conditioning cooling tower, and temperature sensors on the outlet pipes of the heat recovery condenser.

[0115] Within the pre-designed building, the cooling capacity required for air conditioning operation is mainly related to the outdoor temperature. Without condensation heat recovery, the outdoor temperature is monitored by a thermometer, and the power consumption of the air conditioning unit is monitored by the power meter supplying the air conditioning unit.

[0116] Establish a functional relationship between outdoor temperature and power consumption of air conditioning unit, and then establish a functional relationship between outdoor temperature and cooling capacity of air conditioning unit through the relationship between cooling capacity and power consumption;

[0117] The flow sensor of the air conditioning cooling tower circulating pump provides real-time feedback on the amount of water entering the air conditioning cooling tower, providing basic data for adjusting the flow rate of the circulating pump.

[0118] Furthermore, the data collection unit for the domestic hot water unit also includes:

[0119] The sources of relevant data for the operation of the domestic hot water unit system include at least the water meter installed on the hot water tank supply pipe, the power meter for the domestic hot water heat pump unit, and the flow sensor for the circulating pump of the air source heat pump unit.

[0120] The amount of water added to the hot water tank at different times is read by the water meter installed on the hot water tank supply pipe to determine the amount of domestic hot water used.

[0121] The power consumption of the heat pump unit is monitored by the power meter of the domestic hot water heat pump unit, and the flow sensor of the air source heat pump unit's circulating pump provides real-time feedback on the amount of water entering the air source heat pump unit for heating, providing basic data for adjusting the flow rate of the air source heat pump unit's circulating pump.

[0122] Furthermore, the air conditioning unit control unit also includes:

[0123] The functional relationship between the total energy consumption of the air conditioning unit operation and domestic hot water preparation and the preheating temperature of the air conditioning unit's condensing heat recovery is obtained under different outdoor temperatures. The optimal value of the preheating temperature of the air conditioning unit's condensing heat recovery is calculated under different outdoor temperatures, that is, the value of the preheating temperature of the condensing heat recovery corresponding to the minimum total energy consumption of the system.

[0124] The flow rate of the air conditioning cooling tower circulation pump is controlled to adjust the amount of water entering the cooling tower, thereby regulating the water temperature of the standard condenser. The temperature is monitored in real time by a temperature sensor to adjust the condensing heat recovery water temperature of the air conditioning unit to the optimal temperature.

[0125] Furthermore, the domestic hot water unit control unit also includes:

[0126] When the condensing heat recovery water temperature of the air conditioning unit is at the optimal water temperature, the required operating time of the air source heat pump unit and the heat pump circulation pump is obtained to ensure that the domestic hot water is heated to the required temperature for use.

[0127] When the condensing heat recovery temperature of the air conditioner is high, the air source heat pump unit has a short start-up time and provides less heat.

[0128] When the condensing heat recovery temperature of the air conditioner is low, the air source heat pump unit has a longer start-up time and provides more heat, achieving the goal of minimum energy consumption and minimum carbon emissions while meeting the domestic hot water supply requirements.

[0129] In this embodiment, reference is made to the appendix. Figure 3 and 4 When the air conditioning unit is running, the power consumption of the air conditioning unit at different temperatures is measured using thermometer 17 and power meter 16. Based on the relationship between the air conditioning cooling capacity and the power consumption provided by the air conditioning manufacturer, the functional relationship between the building's outdoor temperature and the air conditioning unit's cooling capacity is analyzed and calculated: Q 制冷 =g(t) 室外气温 )

[0130] Substitute the outdoor temperature values ​​that may occur during operation (e.g., 25℃~45℃) into the following formula:

[0131]

[0132] Calculate the total energy consumption W of the air conditioning unit operation and domestic hot water preparation under different outdoor temperatures, and the preheating temperature t of the air conditioning unit condensing heat recovery. 预热 The functional relationship is then used to obtain the optimal value t of the preheating water temperature for the condensing heat recovery of the air conditioning unit under different outdoor temperatures. 预热最佳 (i.e., the condensing heat recovery preheating water temperature t corresponding to the minimum total system energy consumption W) 预热 ).

[0133] The air conditioning unit control unit controls the flow rate of the air conditioning cooling tower circulating pump 6, adjusting the amount of water entering the cooling tower, thereby regulating the water temperature of the standard condenser. Temperature sensor 7 monitors this in real time, adjusting the condensing heat recovery water temperature of the air conditioning unit to the optimal temperature. 预热最佳 .

[0134] The domestic hot water unit control unit controls the condensate heat recovery water temperature of the air conditioning unit to be at the optimal water temperature. 预热最佳The air source heat pump unit 14 and the heat pump circulation pump 13 need to operate for a certain period of time to ensure that domestic hot water is heated to the required temperature. When the air conditioner condensing heat recovery temperature is high, the air source heat pump unit 14 operates for a shorter time and provides less heat. When the air conditioner condensing heat recovery temperature is low, the air source heat pump unit 14 operates for a longer time and provides more heat. This achieves the goal of minimizing energy consumption and carbon emissions while meeting the domestic hot water supply requirements.

[0135] The operating condition adjustment process of the air conditioning unit and domestic hot water unit in the above process can be automatically controlled by the central controller 15 through PLC programming. No manual operation is required during operation, the degree of automation is high and the management is simple.

[0136] Taking the preheating of domestic hot water using the condensate heat recovery system of a building's air conditioning system as an example, when the outlet water temperature of the air conditioning heat recovery system meets the requirement of 34℃, the COP (Coefficient of Performance) is... 空调 The COP of the screw chiller is 5.155 kW / kW. Under total heat recovery conditions, for every 1°C increase in condensing temperature, the COP of the screw chiller increases. 空调 The COP decreases by approximately 3%, and can be obtained from the above parameters. 空调 With t L t 预热 The functional relationship is COP 空调 = -0.1456t 预热 +10.099 = -0.1456t L +10.099. At an atmospheric temperature of 35°C, the cooling capacity Q... 制冷 =527.55kW, air conditioning operation time 12h / d. Average efficiency (COP) of air source heat pump for domestic hot water system. 热水热泵 The efficiency of domestic hot water distribution, η, is 4.30. r The figure is 65%. Under operating condition 1: When the domestic hot water consumption is 30 m³ / d, the total system energy consumption W can be summarized as follows: At this point, within the designed heat recovery outlet water temperature range, the screw chiller condenser heat recovery outlet water temperature that ensures the lowest total system energy consumption is 34℃. Therefore, under this operating condition, the optimal water temperature for the air conditioning unit's condenser heat recovery is set to t. 预热最佳 The temperature is set to 34℃. Condition 2: With other parameters unchanged, when the domestic hot water consumption is 100 m³ / d, the total system energy consumption W can be summarized as follows: At this point, within the designed heat recovery outlet water temperature range, the screw chiller condenser heat recovery outlet water temperature that ensures the lowest total system energy consumption is 36℃. Therefore, under this operating condition, the optimal water temperature for the air conditioning unit's condenser heat recovery is set to t. 预热最佳 Set to 36℃.

[0137] Those skilled in the art will understand that the contents disclosed herein can be varied and modified in many ways. For example, the various devices or components described above can be implemented in hardware, or in software, firmware, or a combination of some or all of the three.

[0138] This disclosure uses flowcharts to illustrate the steps of a method according to embodiments of this disclosure. It should be understood that the preceding or following steps are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes.

[0139] Those skilled in the art will understand that all or part of the steps in the above methods can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Accordingly, each module / unit in the above embodiments can be implemented in hardware or as a software functional module. This disclosure is not limited to any particular combination of hardware and software.

[0140] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0141] The foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it. While several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined by the claims. It should be understood that the foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present disclosure is defined by the claims and their equivalents.

[0142] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0143] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cold and heat recovery cycle method based on energy consumption monitoring, characterized in that, include: Read, collect, and store relevant data on the operation of the air conditioning unit system, and establish functional relationships between outdoor temperature and power consumption of the air conditioning unit and between outdoor temperature and cooling capacity of the air conditioning unit; Read, collect, and store relevant data on the operation of the domestic hot water unit system to obtain information on domestic hot water consumption; The functional relationship between the total energy consumption of the air conditioning unit operation and domestic hot water preparation and the preheating temperature of the air conditioning unit's condensing heat recovery is obtained under different outdoor temperatures. The optimal value of the preheating temperature of the air conditioning unit's condensing heat recovery is calculated under different outdoor temperatures, that is, the value of the preheating temperature of the condensing heat recovery corresponding to the minimum total energy consumption of the system. Controlling the flow rate of the air conditioning cooling tower circulating pump and adjusting the amount of water entering the cooling tower, thereby adjusting the water temperature of the standard condenser, and using a temperature sensor to detect in real time, the condensing heat recovery water temperature of the air conditioning unit is adjusted to the optimal water temperature; Control the start and stop of the air source heat pump unit and heat pump circulation pump in the hot water system, and control the running time of the air source heat pump unit and heat pump circulation pump to ensure that the domestic hot water is heated to the required temperature.

2. The cold and heat recovery cycle method based on energy consumption monitoring as described in claim 1, characterized in that, The process of reading, collecting, and storing relevant data on the operation of the air conditioning unit system, and establishing functional relationships between outdoor temperature and the power consumption of the air conditioning unit, and between outdoor temperature and the cooling capacity of the air conditioning unit, also includes: The sources of relevant data for the operation of the air conditioning unit system include at least thermometers, power meters for the air conditioning unit, flow sensors for the air conditioning cooling tower circulating pump, and temperature sensors on the outlet pipe of the heat recovery condenser. Within the pre-designed building, the cooling capacity required for air conditioning operation is mainly related to the outdoor temperature. Without condensation heat recovery, the outdoor temperature is monitored by a thermometer, and the power consumption of the air conditioning unit is monitored by the power meter supplying the air conditioning unit. Establish a functional relationship between outdoor temperature and power consumption of air conditioning unit, and then establish a functional relationship between outdoor temperature and cooling capacity of air conditioning unit through the relationship between cooling capacity and power consumption; The flow sensor of the air conditioning cooling tower circulating pump provides real-time feedback on the amount of water entering the air conditioning cooling tower, providing basic data for adjusting the flow rate of the circulating pump.

3. The cold and heat recovery cycle method based on energy consumption monitoring as described in claim 1, characterized in that, The process of reading, collecting, and storing relevant data on the operation of the domestic hot water unit system and obtaining information on domestic hot water consumption also includes: The sources of relevant data for the operation of the domestic hot water unit system include at least the water meter installed on the hot water tank supply pipe, the power meter for the domestic hot water heat pump unit, and the flow sensor for the circulating pump of the air source heat pump unit. The amount of water added to the hot water tank at different times is read by the water meter installed on the hot water tank supply pipe to determine the amount of domestic hot water used. The power consumption of the heat pump unit is monitored by the power meter of the domestic hot water heat pump unit, and the flow sensor of the air source heat pump unit's circulating pump provides real-time feedback on the amount of water entering the air source heat pump unit for heating, providing basic data for adjusting the flow rate of the air source heat pump unit's circulating pump.

4. The cold and heat recovery cycle method based on energy consumption monitoring as described in claim 1, characterized in that, The control of the start-up and shutdown of the air source heat pump unit and heat pump circulation pump in the hot water system, and the control of the required operating time of the air source heat pump unit and heat pump circulation pump to ensure that domestic hot water is heated to the required temperature, also includes: When the condensing heat recovery water temperature of the air conditioning unit is at the optimal water temperature, the required operating time of the air source heat pump unit and the heat pump circulation pump is obtained to ensure that the domestic hot water is heated to the required temperature for use. When the condensing heat recovery temperature of the air conditioner is high, the air source heat pump unit has a short start-up time and provides less heat. When the condensing heat recovery temperature of the air conditioner is low, the air source heat pump unit has a longer start-up time and provides more heat, achieving the goal of minimum energy consumption and minimum carbon emissions while meeting the domestic hot water supply requirements.

5. A cold and heat recovery cycle system based on energy consumption monitoring, characterized in that, include: Air conditioning unit data collection unit, domestic hot water unit data collection unit, air conditioning unit control unit, and domestic hot water unit control unit; The air conditioning unit data collection unit includes an air conditioning unit power consumption monitoring module and an air conditioning cooling tower circulating pump flow monitoring module. The domestic hot water unit data collection unit includes a hot water tank replenishment monitoring module, a domestic hot water air source heat pump unit power consumption monitoring module, and an air source heat pump unit circulating pump flow monitoring module. The air conditioning unit control unit includes an air conditioning cooling tower circulating pump flow control module; The control unit for the domestic hot water unit includes a hot water system air source heat pump start-stop control module and an air source heat pump circulation pump start-stop control module. The air conditioning unit data collection unit reads, collects, and stores relevant data on the operation of the air conditioning unit system, and establishes a functional relationship between outdoor temperature and the power consumption of the air conditioning unit and a functional relationship between outdoor temperature and the cooling capacity of the air conditioning unit. The domestic hot water unit data collection unit reads, collects, and stores relevant data on the operation of the domestic hot water unit system to obtain information on the domestic hot water consumption. The air conditioning unit control unit also includes: obtaining the functional relationship between the total energy consumption of the air conditioning unit operation and domestic hot water preparation and the preheating temperature of the air conditioning unit's condensing heat recovery under different outdoor temperatures, and calculating the optimal value of the preheating temperature of the air conditioning unit's condensing heat recovery under different outdoor temperatures, that is, the condensing heat recovery preheating temperature value corresponding to the minimum total energy consumption of the system. Controlling the flow rate of the air conditioning cooling tower circulating pump and adjusting the amount of water entering the cooling tower, thereby adjusting the water temperature of the standard condenser, and using a temperature sensor to detect in real time, the condensing heat recovery water temperature of the air conditioning unit is adjusted to the optimal water temperature; The domestic hot water unit control unit controls the start and stop of the air source heat pump unit and the heat pump circulation pump in the hot water system, and controls the running time of the air source heat pump unit and the heat pump circulation pump to ensure that the domestic hot water is heated to the required temperature.

6. A cold and heat recovery cycle system based on energy consumption monitoring as described in claim 5, characterized in that, The air conditioning unit data collection unit further includes: The sources of relevant data for the operation of the air conditioning unit system include at least thermometers, power meters for the air conditioning unit, flow sensors for the air conditioning cooling tower circulating pump, and temperature sensors on the outlet pipe of the heat recovery condenser. Within the pre-designed building, the cooling capacity required for air conditioning operation is mainly related to the outdoor temperature. Without condensation heat recovery, the outdoor temperature is monitored by a thermometer, and the power consumption of the air conditioning unit is monitored by the power meter supplying the air conditioning unit. Establish a functional relationship between outdoor temperature and power consumption of air conditioning unit, and then establish a functional relationship between outdoor temperature and cooling capacity of air conditioning unit through the relationship between cooling capacity and power consumption; The flow sensor of the air conditioning cooling tower circulating pump provides real-time feedback on the amount of water entering the air conditioning cooling tower, providing basic data for adjusting the flow rate of the circulating pump.

7. A cold and heat recovery cycle system based on energy consumption monitoring as described in claim 5, characterized in that, The domestic hot water unit data collection unit also includes: The sources of relevant data for the operation of the domestic hot water unit system include at least the water meter installed on the hot water tank supply pipe, the power meter for the domestic hot water heat pump unit, and the flow sensor for the circulating pump of the air source heat pump unit. The amount of water added to the hot water tank at different times is read by the water meter installed on the hot water tank supply pipe to determine the amount of domestic hot water used. The power consumption of the heat pump unit is monitored by the power meter of the domestic hot water heat pump unit, and the flow sensor of the air source heat pump unit's circulating pump provides real-time feedback on the amount of water entering the air source heat pump unit for heating, providing basic data for adjusting the flow rate of the air source heat pump unit's circulating pump.

8. A cold and heat recovery cycle system based on energy consumption monitoring as described in claim 5, characterized in that, The control unit for the domestic hot water unit also includes: When the condensing heat recovery water temperature of the air conditioning unit is at the optimal water temperature, the required operating time of the air source heat pump unit and the heat pump circulation pump is obtained to ensure that the domestic hot water is heated to the required temperature for use. When the condensing heat recovery temperature of the air conditioner is high, the air source heat pump unit has a short start-up time and provides less heat. When the condensing heat recovery temperature of the air conditioner is low, the air source heat pump unit has a longer start-up time and provides more heat, achieving the goal of minimum energy consumption and minimum carbon emissions while meeting the domestic hot water supply requirements.

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