A heat storage type high-efficiency clean energy heating system, control and design method

Abstract

The present invention discloses a heat storage type efficient clean energy heating system, control and design method. Traditional air source heat pump heating is greatly affected by outdoor temperature, has poor stability and low system COP. The present invention includes a first cycle air source heat pump cycle heat storage cycle, a second cycle water ring heat pump warming cycle, and a third cycle heating cycle; according to the typical day outdoor temperature change curve, the typical day building heat consumption change curve and the total building consumption, the high temperature operation period is determined, and according to the daily temperature forecast, the high temperature period operation time of the air source heat pump is calculated in advance to ensure the efficient operation of the air source heat pump during the high temperature operation period. During the low temperature period, only the low temperature second cycle warming cycle is operated to extract the heat in the phase change heat storage tank. The present invention can improve the energy efficiency ratio of the air source heat pump and the heating system; solve the problem of unstable operation of the air source heat pump at low temperature, and the operation stability is reliable and the energy saving effect is significant.

Description

Technical Field

[0001] The present invention belongs to the technical field of clean energy utilization, and specifically relates to a heat storage type high-efficiency clean energy heating system, and a control and design method. Background Art

[0002] Biomass energy sources such as coal, oil, and natural gas are increasingly restricted for winter heating, and renewable clean energy heating is gaining widespread attention and support. Air-source heat pumps and water-source heat pumps, as a form of renewable energy, have been vigorously promoted and applied. However, the outdoor temperature varies sinusoidally throughout the day. In severely cold and cold regions of my country where outdoor temperatures are low, the outdoor temperature is higher during the day and lower at night. Air-source heat pumps utilize a reverse Carnot cycle to extract heat from the outdoor air and produce hot air or hot water. Their heating capacity and energy efficiency ratio decrease significantly as the outdoor temperature decreases and as the outlet water temperature increases.

[0003] However, when the outdoor temperature is high, the air source heat pump has a large heating capacity and a high energy efficiency ratio (COP) of the unit, but the required heat load of the building is small at this time. When the outdoor temperature is low, the air source heat pump has a small heating capacity and a low energy efficiency ratio (COP) of the unit, but the required heat load is large at this time. The working principle of the traditional air source heat pump system causes a scissors difference between the heating capacity of the air source heat pump and the heat load of the building when the air source heat pump is used for heating, resulting in mismatch and other problems.

[0004] Therefore, traditional air-source heat pump heating suffers from poor climate adaptability, low outlet water temperature, significant influence of outdoor temperature on heating, and poor stability. Furthermore, as outdoor temperature decreases, the supply water temperature increases, significantly reducing energy efficiency and consuming more energy. These characteristics result in a low COP for the entire air-source heat pump system, preventing it from fully leveraging its clean energy heating advantages. Traditional water-source heat pumps also face numerous geological constraints, including high well drilling costs, difficulty in recharging well water, and the potential for groundwater contamination, limiting their regional adaptability. Summary of the Invention

[0005] In order to make up for the shortcomings of the existing technology, the present invention provides a heat storage type high-efficiency clean energy heating system, control and design method, which fully utilizes the high temperature period outdoors in winter to improve the COP of the air source heat pump, and can also reduce the outlet water temperature of the air source heat pump, further improving the COP of the air source heat pump; it realizes heating and heat storage during high temperature periods outdoors, and heat use during low temperature periods outdoors, solving the problems of mismatch between the heating supply of a single air source heat pump and the heat load of the building, unstable heating, and low system energy efficiency.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A heat storage type high efficiency clean energy heating system, characterized by comprising three circulation loops:

[0008] The first circulation loop is an air source heat pump heating and heat storage cycle, including a first compressor, a first evaporator, a first throttling expansion valve, a first condenser and a first circulating water pump;

[0009] The second circulation loop is a water ring heat pump heating cycle, including a second compressor, a second evaporator, a second throttling expansion valve, a second condenser, a second circulating water pump, a hot water storage tank, a first electric valve and a second electric valve;

[0010] The third circulation loop is a heating circulation loop, including a third circulation water pump, a user terminal heat dissipation device, a third electric valve and a fourth electric valve;

[0011] Furthermore, in the first circulation loop, the first throttling expansion valve is provided on the path from the first condenser to the first evaporator; the first compressor is provided on the path from the first evaporator to the first condenser; and the first circulating water pump is provided on the path between the first condenser and the hot water storage tank.

[0012] Furthermore, a second circulating water pump is provided in a loop formed by the hot water storage tank and the second evaporator, a second electric valve is provided at the inlet of the second circulating water pump, a first electric valve is provided on the connecting pipe between the second evaporator and the hot water storage tank, a second throttling expansion valve is provided on the path from the second condenser to the second evaporator, and a second compressor is provided on the path from the second evaporator to the second condenser;

[0013] Furthermore, a circulation loop is formed between the user terminal heat sink and the second condenser through the third circulation water pump, and a parallel circulation loop is formed between the user terminal heat sink through the third electric valve and the fourth electric valve and the hot water storage tank through the third circulation water pump;

[0014] A control method for a heat storage type high-efficiency clean energy heating system, characterized by:

[0015] According to the outdoor temperature on a typical meteorological day, the outdoor temperature is divided into "high temperature period (T1-T2)" and "low temperature period (T2-T1)";

[0016] Operation method during high temperature period (T1-T2): Calculate the operation time of the air source heat pump during high temperature period in advance according to the daily temperature forecast. Start the first cycle heating and heat storage cycle during high temperature period (T1-T2), and use the reverse Carnot cycle to extract the heat from the "high temperature" outdoor air to heat the low-temperature water in the water storage tank to 50°C. At the same time, start the second cycle warming cycle, and use the reverse Carnot cycle to extract the heat from the water storage tank to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the third circulating water pump is used to deliver it to the user's terminal heat dissipation device to meet the user's heating needs.

[0017] Operation method during low temperature period (T2-T1): When the outlet water temperature of the hot water storage tank is greater than 40°C, the first cycle heating and heat storage cycle is closed, the second warming cycle is closed, and only the third heating cycle is opened. The first and second electric valves are closed, the third and fourth electric valves are opened, and the third circulation water pump is turned on to directly use the hot water in the hot water storage tank to heat the user's terminal heat dissipation device;

[0018] When the outlet water temperature of the heat storage tank is less than 40°C, only the second cycle warming cycle and the third cycle heating cycle are operated; the second cycle warming cycle is turned on, the third electric valve and the fourth electric valve are closed, the first electric valve and the second electric valve are opened, and the reverse Carnot cycle is used to extract the remaining stored heat in the heat storage tank to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the third circulating water pump is used to deliver it to the user's terminal heat dissipation device until the outlet water temperature of the heat storage tank drops to 15°C.

[0019] A design method for a heat storage type high-efficiency clean energy heating system is characterized by:

[0020] 1) Design method of the first loop air source heat pump heating and thermal storage cycle:

[0021] According to local climatic conditions, determine the typical day outdoor temperature change curve L1, and use it to calculate the typical day building heat consumption curve L2 and the total building heat consumption M0. Comprehensively determine the typical day outdoor temperature change curve L1 and the typical day building heat consumption curve L2. According to the performance of the selected first cycle air source heat pump, determine the high temperature operation period (T1~T2), calculate the theoretical heating capacity Q0 required per unit time during the high temperature period, further calculate the nominal heating capacity Q of the selected air source heat pump, and use this to calculate the first cycle water pump flow G1;

[0022] The theoretical heating capacity Q0 is:

[0023]

[0024] The nominal heating capacity Q of the air source heat pump is:

[0025]

[0026] Where K1 is the defrost correction coefficient during the high temperature period, and K2 is the temperature correction coefficient during the high temperature period;

[0027] The flow rate G1 of the first circulating water pump is:

[0028] Where, t2 is the outlet water temperature of the first condenser, and t1 is the inlet water temperature of the first condenser;

[0029] 2) Design method for the second circulation loop water ring heat pump heating cycle and the third circulation loop heating cycle:

[0030] According to local climate conditions and the local winter heating design temperature, calculate the building's winter heating heat load Q1, and combine the performance of the selected water ring heat pump to calculate the nominal heating capacity Qs of the selected second circulation water ring heat pump, and use this to calculate the second circulation water pump flow G2 and the third circulation water pump flow G3;

[0031] The nominal heating capacity Qs of the second circulating water ring heat pump is:

[0032]

[0033] Where K3 is the water inlet temperature modification coefficient of the water ring heat pump;

[0034] The flow rate G2 of the second circulating water pump is:

[0035]

[0036] Where, t3 is the inlet water temperature of the second evaporator, t4 is the outlet water temperature of the second evaporator, and COPs is the COP value of the water ring heat pump in this working state;

[0037] The flow rate G3 of the third circulating water pump is:

[0038]

[0039] Where, t6 is the water supply temperature at the heat dissipation end, and t5 is the return water temperature at the heat dissipation end;

[0040] 3) Design method of water volume of hot water storage tank:

[0041] Based on the total building heat consumption M0 calculated above, the required hot water storage tank volume (m3) is calculated as follows:

[0042]

[0043] Where Cw is the specific heat capacity of water;

[0044] ρ is the density of water;

[0045] t8 is the maximum temperature controlled by the water tank;

[0046] t7 is the lowest temperature controlled by the water tank.

[0047] Beneficial effects of the present invention:

[0048] 1) The present invention utilizes the daily sinusoidal variation of outdoor temperature and fully utilizes high-temperature periods, greatly improving the environmental adaptability of air-source heat pumps and the energy efficiency ratio (COP) of air-source heat pumps. Traditional air-source heat pump heating systems operate 24 hours a day, and during high-temperature periods, their efficiency cannot be fully utilized due to the low building heat load, and during low-temperature periods, the heating efficiency is low. However, the present invention only operates the first-cycle heating and heat storage cycle during high-temperature periods, effectively solving this problem, improving the energy efficiency ratio (COP) of air-source heat pumps, and greatly improving the environmental adaptability of air-source heat pumps.

[0049] 2) The present invention reduces the outlet water temperature of the air source heat pump, further improving the energy efficiency ratio (COP) of the air source heat pump and reducing the configuration capacity of the air source heat pump. For traditional air source heat pump heating, the hot water temperature needs to be above 50°C. As the outdoor temperature decreases, the outlet water temperature increases, the energy efficiency ratio (COP) decreases, and the heating capacity decreases. In order to meet the heating needs, the capacity configuration needs to be increased. However, the outlet water temperature of the air source heat pump of this system is 15-50°C, which greatly improves the COP of the air source heat pump and reduces the configuration capacity of the air source heat pump.

[0050] 3) The present invention is stable and reliable, with significant energy-saving effects. The first cycle of the air source heat storage cycle only operates during high-temperature periods, solving the problems of poor stability and high attenuation of air source heat pumps under low-temperature operation. The second cycle of the present invention is a water ring heat pump. Since the water temperature at the inlet of the second evaporator is much higher than its rated inlet water temperature, the heating stability of the water ring heat pump is greatly improved, the energy efficiency ratio (COP) is also greatly improved, and the energy-saving effect is significant.

[0051] 4) Compared with phase change thermal storage tanks, water tank thermal storage has lower initial investment and can make full use of the heat of the cascaded water storage tanks to reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic structural diagram of the heat storage type high-efficiency clean energy heating system of the present invention;

[0053] Figure 2 A flow chart of the design method of the present invention;

[0054] Figure 3 This is a graph showing the outdoor temperature changes and building heat consumption on a typical day. DETAILED DESCRIPTION

[0055] The present invention will be described in detail below with reference to specific embodiments.

[0056] 1) Thermal storage type efficient clean energy heating system

[0057] like Figure 1 As shown, the present invention includes three circulation loops:

[0058] a) The first circulation loop is an air source heat pump heating and thermal storage cycle, including a first compressor 1-1, a first evaporator 1-2, a first throttling expansion valve 1-3, a first condenser 1-4, and a first circulating water pump 1-5. In the first circulation loop, the first throttling expansion valve 1-3 is arranged on the path from the first condenser 1-4 to the first evaporator 1-2; the first compressor 1-1 is arranged on the path from the first evaporator 1-2 to the first condenser 1-4; and the first circulating water pump 1-5 is arranged on the path between the first condenser 1-4 and the hot water storage tank 2-6.

[0059] b) The second circulation loop is a water ring heat pump warming loop, including a second compressor 2-1, a second evaporator 2-2, a second throttling expansion valve 2-3, a second condenser 2-4, a second circulating water pump 2-5, a hot water storage tank 2-6, a first electric valve 2-7 and a second electric valve 2-8; the second circulating water pump 2-5 is arranged on the loop formed by the hot water storage tank 2-6 and the second evaporator 2-2, and a second electric valve 2-8 is provided at the inlet of the second circulating water pump 2-5, and a first electric valve 2-7 is provided on the connecting pipe between the second evaporator 2-2 and the hot water storage tank 2-6, the second throttling expansion valve 2-3 is provided on the path from the second condenser 2-4 to the second evaporator 2-2, and the second compressor 2-1 is provided on the path from the second evaporator 2-2 to the second condenser 2-4.

[0060] c) The third circulation loop is a heating cycle, including a third circulating water pump 3-1, a user terminal heat sink 3-4, a third electric valve 3-2 and a fourth electric valve 3-3; a circulation loop is formed between the user terminal heat sink 3-4 and the second condenser 2-4 through the third circulating water pump 3-1, and a parallel circulation loop is formed between the user terminal heat sink 3-4 through the third electric valve 3-2 and the fourth electric valve 3-3 and the heat storage tank 2-6 through the third circulating water pump 3-1.

[0061] This system can effectively reduce the outlet water temperature of air-source heat pumps, significantly improving the energy efficiency of both the air-source heat pump and the entire heating system. By fully utilizing air energy, the system effectively resolves the unstable operation of air-source heat pumps at low temperatures, broadening the application range of air-source heat pumps, ensuring reliable operation, and achieving significant energy savings.

[0062] 2) Control method of heat storage type high-efficiency clean energy heating system

[0063] According to the outdoor temperature on a typical meteorological day, the outdoor temperature is divided into "high temperature period (T1-T2)" and "low temperature period (T2-T1)";

[0064] Operation method during high temperature period (T1-T2): Based on the daily temperature forecast, the operation time of the high temperature period of the air source heat pump is calculated in advance. During the high temperature period (T1-T2), the first cycle heating and heat storage cycle is started, and the heat of the "high temperature" outdoor air is extracted by the reverse Carnot cycle to heat the low-temperature water in the water storage tank 2-6 to 50°C; at the same time, the second cycle warming cycle is started, and the heat in the water storage tank 2-6 is extracted by the reverse Carnot cycle to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the return water is sent to the user's terminal heat dissipation device 3-4 by the third circulating water pump 3-1 to meet the user's heating needs;

[0065] Operation method during low temperature period (T2-T1): When the outlet water temperature of the hot water storage tank 2-6 is greater than 40°C, the first heating cycle is closed, the second warming cycle is closed, and only the third heating cycle is opened. The first electric valve 2-7 and the second electric valve 2-8 are closed, the third electric valve 3-2 and the fourth electric valve 3-3 are opened, and the third circulation water pump 3-1 is turned on to directly use the hot water in the hot water storage tank 2-6 to heat the user terminal heat sink 3-4;

[0066] When the outlet water temperature of the hot water storage tank 2-6 is less than 40°C, only the second cycle warming cycle and the third cycle heating cycle are operated; the second cycle warming cycle is turned on, the third electric valve 3-2 and the fourth electric valve 3-3 are closed, the first electric valve 2-7 and the second electric valve 2-8 are opened, and the reverse Carnot cycle is used to extract the remaining stored heat in the hot water storage tank 2-6 to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the third circulating water pump 3-1 is used to send it to the user terminal heat dissipation device 3-4 until the outlet water temperature of the hot water storage tank 2-6 drops to 15°C.

[0067] 3) Design method of thermal storage type efficient clean energy heating system

[0068] a) Design method for the first loop air source heat pump heating and thermal storage cycle:

[0069] According to local climatic conditions, determine the typical day outdoor temperature change curve L1, and use it to calculate the typical day building heat consumption curve L2 and the total building heat consumption M0. Comprehensively determine the typical day outdoor temperature change curve L1 and the typical day building heat consumption curve L2. According to the performance of the selected first cycle air source heat pump, determine the high temperature operation period (T1~T2), calculate the theoretical heating capacity Q0 required per unit time during the high temperature period, further calculate the nominal heating capacity Q of the selected air source heat pump, and use this to calculate the first cycle water pump flow G1;

[0070] The theoretical heating capacity Q0 is:

[0071]

[0072] The nominal heating capacity Q of the air source heat pump is:

[0073]

[0074] Where K1 is the defrost correction coefficient during the high temperature period, and K2 is the temperature correction coefficient during the high temperature period;

[0075] The flow rate G1 of the first circulating water pump is:

[0076] Where, t2 is the outlet water temperature of the first condenser, and t1 is the inlet water temperature of the first condenser;

[0077] b) Design method for the second circulation loop water ring heat pump heating cycle and the third circulation loop heating cycle:

[0078] According to local climate conditions and the local winter heating design temperature, calculate the building's winter heating heat load Q1, and combine the performance of the selected water ring heat pump to calculate the nominal heating capacity Qs of the selected second circulation water ring heat pump, and use this to calculate the second circulation water pump flow G2 and the third circulation water pump flow G3;

[0079] The nominal heating capacity Qs of the second circulating water ring heat pump is:

[0080]

[0081] Where K3 is the water inlet temperature modification coefficient of the water ring heat pump;

[0082] The flow rate G2 of the second circulating water pump is:

[0083]

[0084] Where, t3 is the inlet water temperature of the second evaporator, t4 is the outlet water temperature of the second evaporator, and COPs is the COP value of the water ring heat pump in this working state;

[0085] The flow rate G3 of the third circulating water pump is:

[0086]

[0087] Where, t6 is the water supply temperature at the heat dissipation end, and t5 is the return water temperature at the heat dissipation end;

[0088] c) Design method of water volume of hot water storage tank:

[0089] Based on the total building heat consumption M0 calculated above, the required hot water storage tank volume (m3) is calculated as follows:

[0090]

[0091] Where Cw is the specific heat capacity of water, kJ / (kg.℃);

[0092] ρ is the density of water; kg / m3

[0093] T8 is the maximum temperature of the water tank, which can be 50℃.

[0094] t7 is the lowest temperature controlled by the water tank, which can be 15℃.

[0095] The present invention works as follows:

[0096] 1) Operation process during high temperature period (T1~T2)

[0097] During the high temperature period (T1-T2), the first cycle heating and heat storage cycle is started, and the reverse Carnot cycle is used to extract heat from the "high temperature" outdoor air, and the low temperature water in the heat storage tank 2-6 is heated to 50°C; at the same time, the second cycle warming cycle is started, and the reverse Carnot cycle is used to extract heat from the heat storage tank 2-6 to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the third circulating water pump 3-1 is used to deliver it to the user terminal heat dissipation device 3-4 to meet the user's heating needs;

[0098] The specific working process is as follows:

[0099] The low-pressure refrigerant vapor from the first evaporator 1-2 is converted into high-pressure and high-temperature refrigerant vapor through the work of the first compressor 1-1, and then passes through the first condenser 1-4 to heat the circulating water from the water storage tank 2-6, heating the circulating water from t1 to t2; after the temperature of the refrigerant vapor is reduced, it passes through the first throttle valve 1-3 to become a low-temperature and low-pressure liquid refrigerant, passes through the first evaporator 1-2 to exchange heat with the "high-temperature" air outside, absorbs the heat of the outdoor air, becomes a low-temperature and low-pressure gas, and then enters the first compressor 1-1; this cycle is repeated, and the heat of the outdoor high-temperature air is stored in the water storage tank 2-6; the low-temperature hot water in the water storage tank 2-6 is provided with circulation power by the first circulation pump 1-5 to complete its circulation with the first condenser 1-4;

[0100] The low-pressure refrigerant vapor from the second evaporator 2-2 is converted into high-pressure, high-temperature refrigerant vapor through the work of the second compressor 2-1. The vapor then passes through the second condenser 2-4 to heat the return water from the heat user 3-4, raising the return water temperature from t5 to t6. After the temperature of the refrigerant vapor is reduced, it passes through the second throttle valve 2-3 and becomes a low-temperature, low-pressure liquid refrigerant. The refrigerant vapor then passes through the second evaporator 2-2 and exchanges heat with the low-temperature hot water in the water storage tank 2-6. After absorbing the heat of the low-temperature hot water in the water storage tank, it becomes a low-temperature, low-pressure gas and enters the second compressor 2-1. This cycle repeats to meet the heating needs of the end user.

[0101] The low-temperature hot water in the heat storage tank 2-6 is powered by the second circulation pump 2-5 to complete its circulation with the second evaporator 2-2; the high-temperature hot water t6 produced by the second condenser 2-4 is powered by the third circulation pump 3-1 to be sent to the user 3-4 for heat dissipation, and then the temperature drops to t5 to the second condenser 2-4.

[0102] 2) Operation process during low temperature period (T2~T1)

[0103] When the outlet water temperature of the hot water storage tank 2-6 is greater than 40°C, the first heating cycle is closed, the second warming cycle is closed, and only the third heating cycle is opened. The electric valves 2-7 and 2-8 are closed, the electric valves 3-2 and 3-3 are opened, and the third circulation water pump 3-1 is turned on to directly use the hot water in the hot water storage tank 2-6 to heat the user terminal heat sink 3-4.

[0104] When the outlet water temperature of the heat storage tank 2-6 is less than 40°C, only the second cycle warming cycle and the third cycle heating cycle are operated; the second cycle warming cycle is turned on, the electric valve 3-2 and the electric valve 3-3 are closed, the electric valve 2-7 and the electric valve 2-8 are opened, and the reverse Carnot cycle is used to extract the remaining stored heat in the heat storage tank 2-6 to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the third circulating water pump 3-1 is used to send the return water to the user terminal heat dissipation device 3-4 until the outlet water temperature of the heat storage tank 2-6 drops to 15°C.

[0105] The content of the present invention is not limited to the embodiments listed. Any equivalent transformation of the technical solution of the present invention made by ordinary technicians in this field after reading the description of the present invention is covered by the claims of the present invention.

Claims

1. A heat storage type high efficiency clean energy heating system, characterized by: It consists of three loops: The first circulation loop is an air source heat pump heating and heat storage cycle, comprising a first compressor (1-1), a first evaporator (1-2), a first throttling expansion valve (1-3), a first condenser (1-4) and a first circulating water pump (1-5); The second circulation loop is a water ring heat pump heating cycle, comprising a second compressor (2-1), a second evaporator (2-2), a second throttling expansion valve (2-3), a second condenser (2-4), a second circulating water pump (2-5), a heat storage tank (2-6), a first electric valve (2-7), and a second electric valve (2-8); The third circulation loop is a heat supply cycle, comprising a third circulation water pump (3-1), a user terminal heat dissipation device (3-4), a third electric valve (3-2) and a fourth electric valve (3-3); In the first circulation loop, the first throttling expansion valve (1-3) is arranged on a path from the first condenser (1-4) to the first evaporator (1-2); the first compressor (1-1) is arranged on a path from the first evaporator (1-2) to the first condenser (1-4); and the first circulating water pump (1-5) is arranged on a path between the first condenser (1-4) and the hot water storage tank (2-6). A second circulating water pump (2-5) is provided on a loop formed by the heat storage tank (2-6) and the second evaporator (2-2); a second electric valve (2-8) is provided at the inlet of the second circulating water pump (2-5); a first electric valve (2-7) is provided on the connecting pipe between the second evaporator (2-2) and the heat storage tank (2-6); a second throttling expansion valve (2-3) is provided on a path from the second condenser (2-4) to the second evaporator (2-2); and a second compressor (2-1) is provided on a path from the second evaporator (2-2) to the second condenser (2-4); A circulation loop is formed between the user terminal heat dissipation device (3-4) and the second condenser (2-4) via the third circulation water pump (3-1), and a parallel circulation loop is formed between the user terminal heat dissipation device (3-4) via the third electric valve (3-2) and the fourth electric valve (3-3) and the heat storage tank (2-6) via the third circulation water pump (3-1).

2. The control method of a heat storage type high-efficiency clean energy heating system according to claim 1, characterized in that: According to the outdoor temperature on a typical meteorological day, the outdoor temperature is divided into high temperature period and low temperature period; Operation method during high temperature period: Based on the daily temperature forecast, the operation time of the air source heat pump during high temperature period is calculated in advance. During the high temperature period, the first cycle heating and heat storage cycle is started, and the heat of the "high temperature" outdoor air is extracted by the reverse Carnot cycle to heat the low-temperature water in the heat storage tank (2-6) to 50°C. At the same time, the second cycle warming cycle is started, and the heat in the heat storage tank (2-6) is extracted by the reverse Carnot cycle to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the return water is sent to the user's terminal heat dissipation device (3-4) by the third circulating water pump (3-1) to meet the user's heating needs. Operation method during low temperature period: When the outlet water temperature of the hot water storage tank (2-6) is greater than 40°C, the first cycle heating and heat storage cycle is closed, the second warming cycle is closed, and only the third heating cycle is opened. The first electric valve (2-7) and the second electric valve (2-8) are closed, the third electric valve (3-2) and the fourth electric valve (3-3) are opened, and the third circulation water pump (3-1) is opened, and the hot water in the hot water storage tank (2-6) is directly used to heat the user terminal heat dissipation device (3-4); When the outlet water temperature of the heat storage tank (2-6) is less than 40°C, only the second cycle heating cycle and the third cycle heating cycle are operated; the second cycle heating cycle is opened, the third electric valve (3-2) and the fourth electric valve (3-3) are closed, the first electric valve (2-7) and the second electric valve (2-8) are opened, and the reverse Carnot cycle is used to extract the remaining stored heat in the heat storage tank (2-6) to heat the return water in the heating cycle. After the return water at 35-40°C is heated to 45-50°C, the return water is sent to the user terminal heat dissipation device (3-4) by the third circulating water pump (3-1) until the outlet water temperature of the heat storage tank (2-6) drops to 15°C.

3. The design method of a heat storage type high-efficiency clean energy heating system according to claim 1 is characterized by: The details are as follows: 1) Design method of the first loop air source heat pump heating and thermal storage cycle: According to local climatic conditions, determine the typical day outdoor temperature change curve L1, and use it to calculate the typical day building heat consumption curve L2 and the total building heat consumption M0. Comprehensively determine the typical day outdoor temperature change curve L1 and the typical day building heat consumption curve L2. According to the performance of the selected first-cycle air source heat pump, determine the high-temperature operation period, calculate the theoretical heating capacity Q0 required per unit time during the high-temperature period, calculate the nominal heating capacity Q of the selected air source heat pump, and use this to calculate the first-cycle water pump flow G1; The theoretical heating capacity Q0 is: The nominal heating capacity Q of the air source heat pump is: Where K1 is the defrost correction coefficient during the high temperature period, and K2 is the temperature correction coefficient during the high temperature period; The flow rate G1 of the first circulating water pump is: Where, t2 is the outlet water temperature of the first condenser, and t1 is the inlet water temperature of the first condenser; 2) Design method for the second circulation loop water ring heat pump heating cycle and the third circulation loop heating cycle: According to local climate conditions and the local winter heating design temperature, calculate the building's winter heating heat load Q1, and combine the performance of the selected water ring heat pump to calculate the nominal heating capacity Qs of the selected second circulation water ring heat pump, and use this to calculate the second circulation water pump flow G2 and the third circulation water pump flow G3; The nominal heating capacity Qs of the second circulating water ring heat pump is: Where K3 is the water inlet temperature modification coefficient of the water ring heat pump; The flow rate G2 of the second circulating water pump is: Where, t3 is the inlet water temperature of the second evaporator, t4 is the outlet water temperature of the second evaporator, and COPs is the COP value of the water ring heat pump in this working state; The flow rate G3 of the third circulating water pump is: Where, t6 is the water supply temperature at the heat dissipation end, and t5 is the return water temperature at the heat dissipation end; 3) Design method of water volume of hot water storage tank: According to the total heat consumption of the building M0 calculated above, calculate the required hot water storage tank volume, m 3 , specifically: Where Cw is the specific heat capacity of water; ρ is the density of water; t8 is the maximum temperature controlled by the water tank; t7 is the lowest temperature controlled by the water tank.

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