Multi-energy coupling heating and heat storage system

Abstract

The utility model discloses a multi-energy coupling heating heat storage system, and relates to the technical field of crude oil and natural gas heating. Comprising a delivery pump, a heat-conducting medium circulating pipeline, a delivery pipeline, a heat pump heat supply module, a condenser, an electric auxiliary heating heat exchanger, a heat load heat exchanger, a buffer tank, a solar heat collector, a heat storage box, an electric heater, a wind-solar network switching control module, a temperature sensor, a stop valve, a two-way three-way electromagnetic valve, a ball valve, a tee joint, a temperature sensor and a calorimeter. According to the utility model, photo-thermal, photovoltaic, wind power, wind heat, heat pump and grid electricity heating technologies can be coupled into a whole, and a comprehensive operation strategy of preferentially comprehensively utilizing clean energy, absorbing staged rich green electricity, utilizing low-cost valley electricity in a peak shifting manner and assorted guaranteeing operation of grid electricity is adopted, so that mutual aid complementation of various clean energy and auxiliary heating of the grid electricity are realized; and stable heat load can be supplied to life and industrial heat scenes in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of crude oil and natural gas heating, in particular to a multi-energy coupling heating heat storage system. Background Art

[0002] In recent years, with the increasingly stringent requirements for energy and environmental protection at home and abroad, high-energy-consuming and high-carbon emission equipment in all walks of life can no longer meet the requirements of green and low-carbon development. There are tens of thousands of high-energy-consuming and high-carbon emission fossil fuel heating furnaces in domestic oil and gas field companies alone, and there is an urgent need to seek clean alternative equipment to reduce carbon emissions. At present, the clean alternative products of fossil fuel heating furnaces of major domestic oil field companies generally have the disadvantages of few heat sources, being greatly affected by the randomness and intermittency of wind power and photovoltaic green electricity, poor adaptability to meteorological and topographic environments in different regions, insufficient continuous supply of clean heat energy for a long time, strong dependence on grid electricity, low clean substitution rate, and high grid electricity cost. If energy storage devices are used to store electricity, the cost will increase significantly. Therefore, the company has developed a clean alternative to fossil fuel heating furnace technology products suitable for the development and production of oil and natural gas. By coupling multiple heat sources and optimizing operation strategies, the clean energy heating heating time and clean substitution rate are significantly improved, the carbon emissions of oil and gas field companies are reduced, and the cost of grid electricity is reduced. At the same time, the randomness of wind and solar energy is reduced, and environmental adaptability is improved. Utility Model Content

[0003] Aiming at the shortcomings of existing heating technology and economy, this utility model innovatively designs a multi-energy coupling heating and heat storage system, which integrates "wind-heat unit and solar collector as two units to form a heat energy conversion module, wind power generation, photovoltaic power generation, and grid power as three units to form a power module, and air heat, ground source heat, and water source heat as three units to form a multi-heat source heat pump module" 8 units and phase change thermal storage materials for coupling heating and heat storage. The system integrates heating units according to meteorological data, and couples different heating units for heating and heat storage according to meteorological conditions in real time, and implements the comprehensive operation strategy of "giving priority to the comprehensive utilization of clean energy, absorbing the phased abundant green electricity, staggered utilization of low-cost valley electricity, and supporting and guaranteeing the operation of grid electricity", so as to realize the mutual assistance and complementarity of various clean energy sources and grid power auxiliary heating, and ensure the real-time supply of stable heat load for living and industrial heating scenarios.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A multi-energy coupling heating heat storage system comprises a delivery pump, a heat transfer medium circulation pipeline, a delivery pipe to an outlet connected to the delivery pipe inlet in the heat transfer medium circulation pipeline, a temperature sensor and a pressure sensor are arranged in the middle of the delivery pipe, the outlet is connected to the right inlet of a two-way three-way solenoid valve, the left outlet of the two-way three-way solenoid valve is connected to the delivery pipe inlet, the delivery pipe outlet is connected to the right inlet of the three-way, the left outlet of the three-way is connected to the delivery pipe inlet, the delivery pipe outlet is connected to the right inlet of the two-way three-way solenoid valve, the lower end outlet of the two-way three-way solenoid valve is connected to the delivery pipe inlet, a temperature sensor is arranged in the middle of the delivery pipe, the outlet is connected to the upper end inlet of the three-way, the right outlet of the three-way is connected to the delivery pipe inlet, the delivery pipe outlet is connected to the stop valve inlet, the stop valve outlet is connected to the delivery pipe inlet, a temperature sensor is arranged in the middle of the delivery pipe, the delivery pipe outlet is connected to the condenser inlet, the condenser outlet is connected to the delivery pipe inlet, the delivery pipe outlet is connected to the stop valve inlet, the stop valve outlet is connected to the delivery pipe inlet, the delivery pipe inlet, the delivery pipe outlet is connected to the stop valve inlet, the delivery pipe outlet is connected to ... stop valve inlet, the delivery pipe outlet is connected to the delivery pipe inlet, the delivery pipe outlet is connected to the stop valve inlet, the delivery pipe outlet is connected to the stop valve inlet, the delivery pipe outlet is connected to the stop valve inlet, the delivery pipe outlet is connected to the stop valve inlet, the delivery pipe outlet is connected to the stop A temperature sensor is provided in the middle of the pipe, the outlet of the delivery pipe is connected to the inlet of the electric auxiliary heating heat exchanger, the outlet of the electric auxiliary heating heat exchanger is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the left inlet of the solenoid valve, the right outlet of the solenoid valve is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the left inlet of the heat load heat exchanger, the right outlet of the heat load heat exchanger is connected to the inlet of the delivery pipe, the outlet of the temperature sensor is provided in the middle of the delivery pipe, and is connected to the lower inlet of the tee, the upper outlet of the tee is connected to the inlet of the delivery pipe, the upper outlet of the solenoid valve is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the left inlet of the tee, the outlet of the delivery pipe is connected to the inlet of the stop valve, the outlet of the stop valve is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the upper inlet of the cache tank, the lower outlet of the cache tank is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the inlet of the stop valve, the outlet of the stop valve is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the inlet of the delivery pump, and the outlet of the delivery pump is connected to the inlet of the delivery pipe;

[0006] The lower end outlet of the two-way three-way solenoid valve is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the inlet of the stop valve, the outlet of the stop valve is connected to the liquid inlet of the heat transfer medium of the solar collector, the liquid inlet and the outlet of the heat transfer medium of the solar collector form a complete circulation branch, the liquid outlet of the heat transfer medium of the solar collector is connected to the inlet of the stop valve, the outlet of the stop valve is connected to the inlet of the delivery pipe, and the outlet of the delivery pipe is connected to the lower end inlet of the three-way valve;

[0007] The left end outlet of the two-way three-way solenoid valve is connected to the inlet of the delivery pipe, the outlet of the delivery pipe is connected to the liquid inlet leaking out of the heat exchange coil in the heat storage tank, the leaking outlet of the heat exchange coil in the heat storage tank is connected to the left inlet of the T-shaped three-way, a temperature sensor is provided at the center of the bottom of the heat storage tank, and an electric heater is provided at the core axis of the heat storage tank, and the wiring terminal of the electric heater is connected to the circuit in the wind-solar grid power switching control module;

[0008] The crude oil enters the heat load heat exchanger from the delivery pipe, ball valve Q1, and delivery pipe in sequence, and after being heated in the heat load heat exchanger, it flows out through the delivery pipe, ball valve Q2, and delivery pipe in sequence.

[0009] Preferably, the heat pump heating module includes three different low-level heat sources, namely, air source, industrial waste heat, and ground source heat, and shares a set of heat transfer medium circulation pipelines, which include a compressor, a condenser, an expansion valve, and a delivery pipe.

[0010] Preferably, the delivery pipe inlet is connected to an air heat source evaporator, the delivery pipe outlet is connected to the right end inlet of the three-way solenoid valve, the upper end outlet of the three-way solenoid valve is connected to the compressor inlet, the compressor outlet is connected to the delivery pipe inlet, the delivery pipe outlet is connected to the lower end inlet of the condenser, the lower end inlet and outlet of the condenser are connected to the delivery pipe inlet, the delivery pipe outlet is connected to the expansion valve inlet, the expansion valve outlet is connected to the delivery pipe inlet, the delivery pipe outlet is connected to the upper end inlet of the tee, the left end outlet of the tee is connected to the delivery pipe inlet, and the delivery pipe outlet is connected to the outlet of the air heat source evaporator.

[0011] Preferably, the delivery pipe inlet is connected to the left end inlet of the three-way solenoid valve, the right end outlet of the three-way solenoid valve is connected to the delivery pipe inlet, and the delivery pipe outlet is connected to the lower left end inlet of the water / ground source heat evaporator;

[0012] The lower right outlet of the water / ground source heat evaporator is connected to the inlet of the delivery pipe, the inlet of the delivery pipe is connected to the left inlet of the tee, the right outlet of the tee is connected to the delivery pipe, the inlet of the water / ground source heat evaporator is connected, the delivery pipe outlet is connected to the lower inlet of the three-way solenoid valve, the lower outlet of the tee is connected to the inlet of the delivery pipe, and the delivery pipe outlet is connected to the upper right inlet of the water / ground source heat evaporator.

[0013] Preferably, the delivery pipe inlet is connected to the right end inlet of the tee, the lower end outlet of the tee is connected to the delivery pipe inlet, and the delivery pipe outlet is connected to the lower end inlet of the tee solenoid valve.

[0014] Preferably, the delivery pump is a delivery pump with adjustable speed.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] 1. The utility model adopts a delivery pump with adjustable speed to adjust the speed of the delivery pump to control the speed at which the heat transfer medium in the pipeline system absorbs or releases heat, thereby achieving control of the heating temperature in the pipeline system.

[0017] 2. The utility model is designed with a heat transfer medium circulation parallel pipeline in the pipeline system, which can switch different paths according to the temperature sensor data in the system, shorten the medium circulation path, and reduce the power consumption of the delivery pump. At the same time, when the system heating temperature exceeds the maximum temperature requirement of the user end, the system can quickly switch the heat transfer medium to flow through the bypass, and switch it back to the original path when the temperature is insufficient, so as to ensure the temperature requirements of the user end in real time.

[0018] 3. The utility model realizes heat exchange by adopting a partition-type heat exchanger in the system. The internal circulating heat transfer medium in the pipeline system is ethylene glycol, and the medium does not directly contact the heat storage tank or the heat exchange medium in the heat exchanger.

[0019] 4. The utility model mainly involves three mainstream energy-saving heating technologies, namely air source heat pump, ground source heat pump and low-level industrial waste heat heat pump, through heat pump. It mainly absorbs and utilizes 5℃~20℃ low-level heat energy in air, soil and industrial hot water free of charge, and then heats the low-level heat energy to 30℃~60℃ medium-low-level heat energy through heat pump technology to meet the water temperature requirements of daily industrial and domestic water.

[0020] 5. In the utility model, when the medium and low heat energy temperatures generated by the heat pump cannot meet the industrial and domestic water temperature requirements, the electric heater in the electric auxiliary heating heat exchanger in the system further increases the medium temperature, and then exchanges it to the ethylene glycol in the pipeline system, thereby further increasing the heat load temperature at the user end.

[0021] 6. The utility model absorbs solar radiation heat during sunny daytime through vacuum tube solar collectors, thus realizing clean utilization of light and heat.

[0022] 7. The utility model mainly includes three power sources, namely wind power generation, photovoltaic power generation and grid power, through the wind-solar-grid power module, which mainly provides power for the built-in electric heater in the heat storage box, and can make full use of the green electricity generated by wind power and photovoltaic power as well as the economical grid power in the off-peak period for heating and heat storage.

[0023] 8. The utility model is equipped with multiple temperature sensors, pressure sensors, stop valves, two-way three-way solenoid valves, delivery pumps, data acquisition devices, front-end controllers, remote control modules, etc., which can measure and monitor the operating conditions of the piping system and major components in real time during the use of the system. At the same time, the automatic control technology and components are used to flexibly and economically and rigidly couple various heating methods in the system to achieve stable, clean and economical operation of the system.

[0024] 9. The utility model adds a heat pump heating module to the system. The heat pump heating module contains three heat sources: air source heat, ground source heat, and industrial waste heat / waste heat. The three heat sources are connected through parallel pipelines to a set of common compressors, condensers, and expansion valves for heat conduction circulation. The heat generated by the heat pump heating module and the electric heater in the electric auxiliary heating heat exchanger is only used to maintain the heating demand of the system user end, and does not flow through the heat storage tank for storage.

[0025] 10. The utility model adds a wind, solar and grid power module to the system and directly installs the main heater in the heat storage tank. The wind power generation power supply and the photovoltaic power generation power supply are directly used as the random heating power supply of the main heater. The grid power supply provides heating power to the main heater during the off-peak period. The system is provided with a delivery pipe connected in parallel with the heat exchange coil in the heat storage tank. The two-way three-way solenoid valve at the front end is controlled to control whether the heat of the heat transfer medium in the pipeline is stored. When storing the heat in the heat transfer medium, the heat transfer medium flows through the heat exchange coil in the heat storage tank and transfers the heat to the phase change heat storage material for storage; when not storing the heat in the heat transfer medium, the heat transfer medium flows through the delivery pipe to complete the cycle. The system integrates the optimal heating units according to the meteorological data, and couples different heating units for heating and heat storage according to meteorological conditions in real time. The heating, heat storage and heat supply control strategies during operation are redesigned and optimized. The heat storage tank in the system is structurally optimized. The heat storage tank uses a linear heat exchange tube bundle and the main electric heater is a U-shaped resistive electric heater. The main heater and the heat exchange tube bundle are cross-shaped and fixed to the inner cavity of the heat storage tank through vertical partitions and horizontal partitions. Inorganic water and salt phase change heat storage materials are filled in the cross-plane interval space to improve the heat exchange efficiency and uniformity. The main heater is connected to the external control cabinet through the through hole on the upper side of the cavity after being connected in parallel with cables. Two groups of water inlets and outlets are provided on the left and right sides of the heat storage box. The ports on both sides of the heat exchange tube bundle in the heat storage box are connected in parallel to divide the left and right sides of the inner cavity into four thin cavities through a "U"-shaped partition. Each thin cavity is connected to a single flange inlet or outlet. The heat exchange area is controlled by controlling the heat transfer medium flowing through the inlet and the number of heat exchange tube bundles. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1 This is a structural schematic diagram of the multi-energy coupling heating and thermal storage system proposed by the utility model;

[0028] Figure 2 for Figure 1 Schematic diagram of the internal structure of the middle heat storage box;

[0029] Figure 3 for Figure 2 A schematic diagram of the structure from another perspective.

[0030] Description of reference numerals:

[0031] 1. Delivery pump; 2. Heat transfer medium circulation pipeline 2; 3. Heat pump heating module; 4. Condenser; 5. Electric auxiliary heating heat exchanger; 6. Heat load heat exchanger; 7. Buffer tank; 8. Solar collector; 9. Heat storage tank; 10. Wind-solar network switching control module. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] The utility model embodiment discloses a multi-energy coupling heating thermal storage system.

[0034] Example 1

[0035] Reference Figure 1-3, a multi-energy coupling heating and heat storage system, including a delivery pump 1, a heat transfer medium circulation pipeline 2, delivery pipes 2-1 to 2-37, a heat pump heating module 3, a condenser 4, an electric auxiliary heating heat exchanger 5, an auxiliary electric heater 5-1, a heat load heat exchanger 6, a cache tank 7, a solar collector 8, a heat storage tank 9, an electric heater 9-1, a wind-solar network switching control module 10, a temperature sensor T1, a stop valve J1-J6, a two-way three-way solenoid valve S1-S5, a ball valve Q1, a ball valve Q2, a three-way B1-B3, a temperature sensor T1-T6, a calorimeter R1, the delivery pump 1 outlet is connected to the delivery pipe 2-1 inlet in the heat transfer medium circulation pipeline 2, a temperature sensor T1 is provided in the middle of the delivery pipe, and the delivery pipe 2-1 outlet is connected to the two-way three-way The right inlet of the solenoid valve S1 is connected, the left outlet of the two-way three-way solenoid valve S1 is connected to the inlet of the delivery pipe 2-2, the outlet of the delivery pipe 2-2 is connected to the right inlet of the tee B1, the left outlet of the tee B1 is connected to the inlet of the delivery pipe 2-3, the outlet of the delivery pipe 2-3 is connected to the right inlet of the two-way three-way solenoid valve S2, the lower end outlet of the two-way three-way solenoid valve S2 is connected to the inlet of the delivery pipe 2-4, a temperature sensor T2 is provided in the middle of the delivery pipe, the outlet of the delivery pipe 2-4 is connected to the upper end inlet of the tee B2, the right outlet of the tee B2 is connected to the inlet of the delivery pipe 2-5, the outlet of the delivery pipe 2-5 is connected to the inlet of the stop valve J3, the outlet of the stop valve J3 is connected to the inlet of the delivery pipe 2-6, a temperature sensor T3 is provided in the middle of the delivery pipe, the delivery pipe The outlet of 2-6 is connected to the inlet of condenser 4, the outlet of condenser 4 is connected to the inlet of delivery pipe 2-7, the outlet of delivery pipe 2-7 is connected to the inlet of stop valve J4, the outlet of stop valve J4 is connected to the inlet of delivery pipe 2-8, a temperature sensor T4 is provided in the middle of the delivery pipe, the outlet of delivery pipe 2-8 is connected to the inlet of electric auxiliary heating heat exchanger 5, the outlet of electric auxiliary heating heat exchanger 5 is connected to the inlet of delivery pipe 2-9, the outlet of delivery pipe 2-9 is connected to the left inlet of electromagnetic valve S3, the right outlet of electromagnetic valve S3 is connected to the inlet of delivery pipe 2-10, the outlet of delivery pipe 2-10 is connected to the left inlet of heat load heat exchanger 6, the right outlet of heat load heat exchanger 6 is connected to the inlet of delivery pipe 2-11, a temperature sensor T5 is provided in the middle of the delivery pipe, The outlet of delivery pipe 2-11 is connected to the lower inlet of tee B3, the upper outlet of tee B3 is connected to the inlet of delivery pipe 2-12, the upper outlet of solenoid valve S3 is connected to the inlet of delivery pipe 2-20, the outlet of delivery pipe 2-20 is connected to the left inlet of tee B3, the outlet of delivery pipe 2-12 is connected to the inlet of stop valve J5, the outlet of stop valve J5 is connected to the inlet of delivery pipe 2-13, the outlet of delivery pipe 2-13 is connected to the upper inlet of cache tank 7, the lower outlet of cache tank 7 is connected to the inlet of delivery pipe 2-14, the outlet of delivery pipe 2-14 is connected to the inlet of stop valve J6, the outlet of stop valve J6 is connected to the inlet of delivery pipe 2-15, the outlet of delivery pipe 2-15 is connected to the inlet of delivery pump 1, and the outlet of delivery pump 1 is connected to the inlet of delivery pipe 2-1;The lower end outlet of the two-way three-way solenoid valve S1 is connected to the inlet of the delivery pipe 2-16, the outlet of the delivery pipe 2-16 is connected to the inlet of the stop valve J1, the outlet of the stop valve J1 is connected to the liquid inlet of the heat transfer medium of the solar collector 8, the liquid inlet and the outlet of the heat transfer medium of the solar collector 8 form a complete circulation branch, the liquid outlet of the heat transfer medium of the solar collector 8 is connected to the inlet of the stop valve J2, the outlet of the stop valve J2 is connected to the inlet of the delivery pipe 2-17, and the outlet of the delivery pipe 2-17 is connected to the lower end inlet of the three-way B1. The left end outlet of the two-way three-way solenoid valve S2 is connected to the inlet of the delivery pipe 2-18, the outlet of the delivery pipe 2-18 is connected to the liquid inlet of the heat exchange coil 2-19 in the heat storage tank 9, the leakage outlet of the heat exchange coil 2-19 in the heat storage tank 9 is connected to the left inlet of the T-type tee B3, and a temperature sensor T6 is provided at the center of the bottom of the heat storage tank 9. At the same time, an electric heater 9-1 is provided at the core axis position of the heat storage tank, and the wiring terminal of the electric heater 9-1 is connected to the circuit in the wind-solar grid power switching control module 10. In the heat pump module 3, the inlet of the delivery pipe 2-25 is connected to the air heat source evaporator 12, the outlet of the delivery pipe 2-25 is connected to the right end inlet of the three-way solenoid valve S4, the upper end outlet of the three-way solenoid valve S4 is connected to the inlet of the compressor 13, the outlet of the compressor 13 is connected to the inlet of the delivery pipe 2-27, the outlet of the delivery pipe 2-27 is connected to the lower end inlet of the condenser 4, the lower end inlet and outlet of the condenser 4 are connected to the inlet of the delivery pipe 2-28, the outlet of the delivery pipe 2-28 is connected to the inlet of the expansion valve 14, the outlet of the expansion valve 14 is connected to the inlet of the delivery pipe 2-28, the outlet of the delivery pipe 2-29 is connected to the upper end inlet of the tee B4, the left end outlet of the tee B4 is connected to the inlet of the delivery pipe 2-30, and the outlet of the delivery pipe 2-30 is connected to the outlet of the air heat source evaporator 12. Industrial waste heat (hot water) enters the pipeline system through the delivery pipe 2-33, the inlet of the delivery pipe 2-33 is connected to the left inlet of the three-way solenoid valve S5, the right outlet of the three-way solenoid valve S5 is connected to the inlet of the delivery pipe 2-34, and the outlet of the delivery pipe 2-34 is connected to the lower left inlet of the water / ground source heat evaporator 11;The lower right outlet of the water / ground source heat evaporator 11 is connected to the inlet of the delivery pipe 2-35, the inlet of the delivery pipe 2-35 is connected to the left inlet of the tee B5, and the right outlet of the tee B5 is connected to the delivery pipe 2-36. The upper left outlet of the water / ground source heat evaporator 11 is connected to the inlet of the delivery pipe 2-32, the outlet of the delivery pipe 2-32 is connected to the lower inlet of the three-way solenoid valve S4, the lower outlet of the tee B4 is connected to the inlet of the delivery pipe 2-31, and the outlet of the delivery pipe 2-31 is connected to the upper right inlet of the water / ground source heat evaporator 11. When using the ground source heat in the heat pump module 3, the heat transfer medium enters the delivery pipe 2-37 from the delivery pipe 2-36, and the delivery pipe 2-37 absorbs the formation heat and then transports it from the inlet to the ground water / ground source heat evaporator 11. The inlet of the delivery pipe 2-36 is connected to the right inlet of the tee B5, the lower outlet of the tee B5 is connected to the inlet of the delivery pipe 2-37, and the outlet of the delivery pipe 2-37 is connected to the lower inlet of the tee solenoid valve S5. The crude oil enters the heat load heat exchanger 6 from the delivery pipe 2-21, the ball valve Q1, and the delivery pipe 2-22 in sequence, and flows out through the delivery pipe 2-23, the ball valve Q2, and the delivery pipe 2-23 in sequence after being heated by the heat load heat exchanger 6.

[0036] Example 2

[0037] Reference Figure 1-3When there is no solar clean energy environment, the system uses heat pump module 3 and electric heater to assist heating to maintain the minimum rigid heat load demand, and the heat exchange medium circulates in the pipeline system in the shortest path. It should be noted that the heat pump module 3 mainly includes three energy-saving heating methods: air source heat pump, ground source heat pump, and low-level industrial waste heat + heat pump; the best ambient operating temperature range of the air source heat pump is -5℃~35℃, and the ground source heat and industrial waste heat temperatures are subject to the actual application environment. Users should choose one of the energy-saving heating methods based on the on-site use environment to reduce system costs.The outlet of delivery pump 1 is connected to delivery pipe 2-1, and temperature sensor T1 and pressure sensor P1 are arranged on delivery pipe 2-1 in sequence. Delivery pipe 2-1 is connected to the right inlet of three-way solenoid valve S1, and the left outlet of three-way solenoid valve S1 is connected to delivery pipe 2-2. Delivery pipe 2-2 is connected to the right inlet of three-way B1, and the left outlet of three-way B1 is connected to delivery pipe 2-3. Delivery pipe 2-3 is connected to the right inlet of three-way solenoid valve S2, and the lower left outlet of three-way solenoid valve S2 is connected to delivery pipe 2-4. Temperature sensor T2 is arranged in delivery pipe 2-4, and delivery pipe 2-4 is connected to the upper inlet of three-way B2, and the right outlet of three-way B2 is connected to delivery pipe 2-5. Delivery pipe 2-5 is connected to stop valve J 3, the stop valve J3 is connected to the delivery pipe 2-6, a temperature sensor T3 is provided in the delivery pipe 2-6, the delivery pipe 2-6 is connected to the left end inlet of the condenser 4, the right end outlet of the condenser 4 is connected to the delivery pipe 2-7, the lower end inlet and outlet of the condenser 4 are respectively connected to the inlet and outlet of the heat pump water exchange pipe, the delivery pipe 2-7 is connected to the stop valve J4, the stop valve J4 is connected to the delivery pipe 2-8, a temperature sensor T4 is provided in the delivery pipe 2-8, the delivery pipe 2-8 is connected to the electric auxiliary heating heat exchanger 5, the electric auxiliary heating heat exchanger 5 is connected to the delivery pipe 2-9, the delivery pipe 2-9 is connected to the left end inlet of the three-way solenoid valve S3, the right end outlet of the three-way solenoid valve S3 is connected to the delivery pipe 2-10, the delivery pipe 2- 10 is connected to the left end inlet of the heat load heat exchanger 6, the upper end outlet of the heat load heat exchanger 6 is connected to the delivery pipe 2-11, the delivery pipe 2-11 is provided with a temperature sensor T5, the delivery pipe 2-11 is connected to the lower end inlet of the tee B3, the upper end outlet of the tee B3 is connected to the delivery pipe 2-12, the delivery pipe 2-12 is connected to the stop valve J5, the stop valve J5 is connected to the delivery pipe 2-13, the delivery pipe 2-13 is connected to the upper end inlet of the buffer tank 7, the lower end outlet of the buffer tank 7 is connected to the delivery pipe 2-14, the delivery pipe 2-14 is connected to the stop valve J6, the stop valve J6 is connected to the delivery pipe 2-15, the delivery pipe 2-15 is connected to the inlet of the delivery pump 1, and the air heat source evaporator 12 in the air source heat pump The outlet is connected to the inlet of the delivery pipe 2-25, the outlet of the delivery pipe 2-25 is connected to the inlet of the right end of the three-way solenoid valve S4, the upper outlet of the three-way solenoid valve S4 is connected to the inlet of the compressor 13, the outlet of the compressor 13 is connected to the inlet of the delivery pipe 2-27, the outlet of the delivery pipe 2-27 is connected to the lower inlet of the condenser 4, the lower inlet and outlet of the condenser 4 is connected to the inlet of the delivery pipe 2-28, the outlet of the delivery pipe 2-28 is connected to the inlet of the expansion valve 14, the outlet of the expansion valve 14 is connected to the inlet of the delivery pipe 2-28, the outlet of the delivery pipe 2-29 is connected to the upper inlet of the tee B4, the left outlet of the tee B4 is connected to the inlet of the delivery pipe 2-30, and the outlet of the delivery pipe 2-30 is connected to the outlet of the air heat source evaporator 12.In the industrial waste heat (hot water) heat pump, the delivery pipe 2-33 enters the pipeline system, the delivery pipe 2-33 inlet is connected to the left inlet of the three-way solenoid valve S5, the right outlet of the three-way solenoid valve S5 is connected to the delivery pipe 2-34 inlet, and the delivery pipe 2-34 outlet is connected to the lower left inlet of the water / ground source heat evaporator 11; the lower right outlet of the water / ground source heat evaporator 11 is connected to the delivery pipe 2-35 inlet, the delivery pipe 2-35 inlet is connected to the left inlet of the three-way B5, and the right outlet of the three-way B5 is connected to the delivery pipe 2-36. The upper left outlet of the water / ground source heat evaporator 11 is connected to the delivery pipe 2-32 inlet, the delivery pipe 2-32 outlet is connected to the lower inlet of the three-way solenoid valve S4, the lower outlet of the three-way B4 is connected to the delivery pipe 2-31 inlet, and the delivery pipe 2-31 outlet is connected to the upper right inlet of the water / ground source heat evaporator 11. In the ground source heat pump, the heat transfer medium enters the delivery pipe 2-37 from the delivery pipe 2-36, and the delivery pipe 2-37 absorbs the formation heat and then delivers it from the inlet to the surface water / ground source heat evaporator 11. The inlet of the delivery pipe 2-36 is connected to the right end inlet of the tee B5, the lower end outlet of the tee B5 is connected to the inlet of the delivery pipe 2-37, and the outlet of the delivery pipe 2-37 is connected to the lower end inlet of the three-way solenoid valve S5.

[0038] When using the air source heat pump in this process, the air source heat pump is started first, and the air heat source evaporator 12 evaporates the internal heat transfer medium into low-temperature and low-pressure steam, which enters the compressor 13 through the delivery pipe 2-25, the right end inlet and the upper end outlet of the three-way solenoid valve S4, and the delivery pipe 2-26; in the compressor 13, the low-temperature and low-pressure steam heat transfer medium is converted into high-temperature and high-pressure steam medium, and then sent to the condenser 4 through the delivery pipe 2-27. The heat transfer medium in the condenser 4 absorbs heat and exchanges it to the circulating heat transfer medium in the heat exchange coil between the delivery pipes 2-6 and 2-7; the circulating heat transfer medium is heated to the required temperature of the user-end heat load heat exchanger 6 through the auxiliary electric heater 5-1 in the electric auxiliary heating heat exchanger 5, and circulates through the delivery pipeline and components from the outlet to the inlet of the delivery pipe 2-1. The user end enters the heat exchange coil in the heat load heat exchanger 6 through the delivery pipes 2-21 and 2-22, and the heat exchange coil absorbs heat and outputs it through the delivery pipes 2-23 and 2-24.

[0039] When low-level industrial waste heat + heat pump is used in this process, the low-level industrial waste heat (hot water) enters the three-way solenoid valve S5 and the delivery pipe 2-34 in sequence through the delivery pipe 2-33, and the low-level industrial waste heat is exchanged to the water / ground source heat evaporator 11, and then the heat transfer medium is refluxed through the three-way B5 and the delivery pipe 2-36. The heat absorbed by the heat-conducting medium in the water / ground source heat evaporator 11 is exchanged to the heat exchange coil connected to the delivery pipe 2-32. The heat-conducting medium in the heat exchange coil absorbs heat and evaporates into low-temperature and low-pressure steam and enters the compressor 13 through the delivery pipe 2-32, the three-way solenoid valve S4, and the delivery pipe 2-26. In the compressor 13, the low-temperature and low-pressure steam heat-conducting medium is converted into high-temperature and high-pressure steam medium, and then sent to the condenser 4 through the delivery pipe 2-27. The heat-conducting medium in the condenser 4 absorbs heat and exchanges it to the circulating heat-conducting medium in the heat exchange coil between the delivery pipes 2-6 and 2-7; the circulating heat-conducting medium is heated to the required temperature of the user-end heat load heat exchanger 6 by the auxiliary electric heater 5-1 in the electric auxiliary heating heat exchanger 5, and circulates through the delivery pipeline and components from the outlet to the inlet of the delivery pipe 2-1. The user end enters the heat exchange coil in the heat load heat exchanger 6 through the delivery pipes 2-21 and 2-22. The heat exchange coil absorbs heat and then outputs it through the delivery pipes 2-23 and 2-24.

[0040] When the geothermal heat pump is used in this process, the geothermal heat (hot water) transfers heat to the heat-conducting medium in the delivery pipe 2-37 and inputs it into the three-way solenoid valve S5 and the delivery pipe 2-34 through the delivery pipe 2-37, and the geothermal heat is exchanged to the water / geothermal heat evaporator 11, and then the heat-conducting medium is refluxed through the three-way B5 and the outlet of the delivery pipe 2-37. The heat absorbed by the heat-conducting medium in the water / ground source heat evaporator 11 is exchanged to the heat exchange coil connected to the delivery pipe 2-32. The heat-conducting medium in the heat exchange coil absorbs heat and evaporates into low-temperature and low-pressure steam and enters the compressor 13 through the delivery pipe 2-32, the three-way solenoid valve S4, and the delivery pipe 2-26. In the compressor 13, the low-temperature and low-pressure steam heat-conducting medium is converted into high-temperature and high-pressure steam medium, and then sent to the condenser 4 through the delivery pipe 2-27. The heat-conducting medium in the condenser 4 absorbs heat and exchanges it to the circulating heat-conducting medium in the heat exchange coil between the delivery pipes 2-6 and 2-7; the circulating heat-conducting medium is heated to the required temperature of the user-end heat load heat exchanger 6 by the auxiliary electric heater 5-1 in the electric auxiliary heating heat exchanger 5, and circulates through the delivery pipeline and components from the outlet to the inlet of the delivery pipe 2-1. The user end enters the heat exchange coil in the heat load heat exchanger 6 through the delivery pipes 2-21 and 2-22, and the heat exchange coil absorbs heat and outputs it through the delivery pipes 2-23 and 2-24. This process realizes the coupling of heating by the heat pump module 3 and heating by electric heating.

[0041] Example 3

[0042] Reference Figure 1-3, the system changes from a non-solar clean energy environment to a solar clean energy environment based on Example 2. The collector 8 in the system absorbs more solar heat and its temperature rises, replacing the heat pump and the heater 5-1 for heating. During the process of solar energy from sunrise to midday and then to sunset, the radiation temperature undergoes a transformation process from low to high and then to low. In the process from sunrise to noon, the vacuum tube solar collector 8 absorbs more and more heat and the temperature rises. When its internal temperature is higher than the condenser 4 and lower than the user-end heat load temperature requirement, the heat transfer medium in the piping system 2 in Example 2 no longer flows through the delivery pipe 2-2, and is switched to flow to the delivery pipe 2-16 connected in parallel with the delivery pipe 2-2 through the three-way solenoid valve S1. The delivery pipe 2-16 is connected to the stop valve J1, and the stop valve J1 is connected to the liquid inlet of the vacuum tube collector 8. The liquid outlet of the vacuum tube collector 8 is connected to the stop valve J2, and the stop valve J2 is connected to the delivery pipe 2-17. The liquid outlet of the delivery pipe 2-17 is connected to the bottom liquid inlet of the tee B1, and the other accessories between the left end outlet of the tee B1 and the inlet of the delivery pump 1 are exactly the same as the connection method in Implementation 2. During this process, when the temperature of the collector 8 is greater than T4, the collector 8 replaces the heat pump module 3 for heating, supplies heat to the user-end heat load heat exchanger 6, and stops the operation of the heat pump module 3; as the light intensity increases again and the temperature in the collector 8 is greater than T5, the collector 8 replaces the auxiliary electric heater 5-1 in the electric auxiliary heating heat exchanger 5 for heating, and stops the operation of the auxiliary electric heater 5-1.

[0043] Example 4

[0044] Reference Figure 1-3, the system stores surplus solar heat through the collector 8. When the temperature of the collector 8 after absorbing solar heat is higher than the upper limit of the heat temperature supplied by the user-side heat load heat exchanger 6, it indicates that the solar heat absorbed by the collector 8 is greater than the heat consumed by the system, and the surplus heat needs to be stored at this time. When the system stores the surplus solar heat absorbed by the collector 8, the circulation path of the heat transfer medium in the pipeline system 2 needs to be readjusted on the basis of Example 3. The system controls the three-way solenoid valve S2 to switch the heat transfer medium that originally flows through the delivery pipe 2-4 in Example 3 to a circulation pipeline in parallel with the delivery pipe 2-4. At this time, the left end outlet of the three-way solenoid valve S2 is connected to the delivery pipe 2-18, and the delivery pipe 2-18 is connected to the external leakage inlet of the heat exchange coil 2-19. The external leakage outlet of the heat exchange coil 2-19 is connected to the left end inlet of the three-way B2; the accessory connection method between the right end outlet of the three-way B2 and the right end inlet of the three-way solenoid valve S1 is exactly the same as the connection method in Example 3. During this process, the solar heat absorbed by the heat-conducting medium in the collector 8 will be exchanged to the phase-change heat storage material in the heat storage tank through the heat exchange coil 2-19 for storage. If the temperature measured by the temperature sensor T5 in the pipeline system 2 is greater than the upper temperature limit of the user-end heat load heat exchanger 6 during this process, the three-way solenoid valve S3 will close the right outlet and open the upper outlet, so that the heat-conducting medium flows through the pipeline system from the parallel delivery pipe 2-20 and the left inlet of the three-way B3 to circulate, so that the heat-conducting medium does not pass through the user-end heat load heat exchanger 6 for heat exchange; when the temperature measured by the temperature sensor T5 is less than the lower temperature limit of the user-end heat load heat exchanger 6, the three-way solenoid valve S3 returns to the state before the last adjustment, and the heat-conducting medium enters the user-end heat load heat exchanger 6 through the delivery pipe 2-10 for heat exchange to supplement the heat that lacks the required temperature. Through the above repeated cycles, the heat demand of the system operation is maintained while completing the solar heat storage. It should be noted that the maximum temperature of the collector 8 after absorbing solar energy is 110° C., so the temperature of the energy stored by the system through the collector is less than or equal to 110° C.

[0045] Example 5

[0046] Reference Figure 1-3, the system releases the excess solar heat stored in the process of Example 4. In the process of Example 4, the heat stored in the heat storage tank 9 by the collector 8 can maintain the heat load demand of the system for several hours after the lack of light during the period from noon to sunset and the lack of light after sunset. During the period from noon to sunset, the temperature of the heat-conducting medium in the collector 8 gradually decreases. When the temperature of the collector 8 after absorbing heat is lower than the minimum required temperature of the heat exchanger 6 using the heat load, it indicates that the solar heat absorbed by the collector 8 is insufficient to maintain the heat consumption demand of the user end in the system. At this time, it is necessary to release the heat stored in Example 4 for compensation. In this process, the heat-conducting medium in the pipeline system 2 flows out of the lower end outlet of the three-way solenoid valve S1 in Example 4 and switches to flow out from the left end outlet of the three-way solenoid valve S1, and circulates through the delivery pipe 2-2 connected in parallel with the collector 8, so that the heat-conducting medium does not flow through the circulation pipeline in the collector 8, reduces the use frequency of the collector 8, and prolongs the service time of the circulation pipeline erosion. The other accessory connection methods between the delivery pipe 2-2 and the delivery pipe 2-1 are exactly the same as those in Example 4. If the temperature measured by the temperature sensor T5 in the pipeline system 2 is greater than the upper temperature limit of the user-end heat load heat exchanger 6 during this process, the same method as in Example 4 is adopted to control the passage of the three-way solenoid valve S3 with the help of the temperature sensor T5 threshold value, so that the heat transfer medium is circulated and switched in parallel between the user-end heat load heat exchanger 6 and the delivery pipe 2-20 to supply the specified required heat to the user end.

[0047] Example 6

[0048] Reference Figure 1-3, the system supplies stored heat energy to the system through the wind-solar-grid power module 10. It should be noted that in the wind-solar-grid power module, wind refers to wind power generation, referred to as wind power; light refers to photovoltaic power generation, referred to as photovoltaic; grid power refers to power supplied by non-clean energy, referred to as grid power. During the operation of the system, the wind-solar-grid power module 10 serves as the power source for the electric heater 9-1 in the thermal storage tank 9, and supplies heat energy to the phase change thermal storage material in the thermal storage tank 9 by electric heating. Grid power is a must-have power in the wind-solar-grid power module, which mainly solves the large day and night, continuous day, and seasonal supply differences in wind and light, and cannot guarantee that the system can store certain required and economical heat. Users configure one of the two clean power equipment, wind power or photovoltaic, according to the climate and geographical conditions of the system installation area, or configure a part of each according to different proportions of capacity, so that the electric heater 9-1 in the system is equipped with two green power sources, wind power and photovoltaic. The wind, solar and grid power module of the system can also introduce green electricity generated by large wind farms or photovoltaic power plants, and consume it through the electric heater 9-1 for heating; it can also introduce wind power and photovoltaic green electricity into the user's self-built microgrid for heating. It should be noted that under the conditions of no wind resources or weak sunlight for several days, the system mainly supplies economical electricity to the electric heater 9-1 through the off-peak period of grid electricity to store low (10℃~60℃), medium (60℃~110℃), and high (110℃~250℃) heat energy, and releases the stored heat during the grid level peak period to provide heat for the system heat load, so as to achieve the purpose of staggered heating and reduce the grid electricity cost.

[0049] During periods of abundant wind resources and sunshine, the wind power and photovoltaic green power in the system mainly store high-level heat energy of 110°C to 250°C through the electric heater 9-1. When the solar clean energy supply is higher than the heat required by the heat load heat exchanger 6 at the user end, the system stores the excess heat energy. When the system stores the excess heat absorbed by the collector, the path of the heat-conducting medium in the pipeline system 2 flowing through the pipeline needs to be re-controlled and adjusted on the basis of Example 4. The system controls the three-way solenoid valve S2 to switch the heat-conducting medium that originally flowed through the delivery pipe 2-4 in Example 4 to a circulation pipeline in parallel with the delivery pipe 2-4. At this time, the left end outlet of the three-way solenoid valve S2 is connected to the delivery pipe 2-18, and the delivery pipe 2-18 is connected to the external leakage inlet of the heat exchange coil 2-19. The external leakage outlet of the heat exchange coil 2-19 is connected to the left end inlet of the three-way B2; the accessory connection method between the right end outlet of the three-way B2 and the right end inlet of the three-way solenoid valve S1 is exactly the same as the connection method in Example 4. During this process, the solar heat absorbed by the heat-conducting medium in the collector 8 will be exchanged to the phase-change heat storage material in the heat storage tank through the heat exchange coil 2-19 for storage. If the temperature measured by the temperature sensor T5 in the pipeline system 2 is greater than the upper temperature limit of the user-end heat load heat exchanger 6 during this process, the three-way solenoid valve S3 will close the right outlet and open the upper outlet, so that the heat-conducting medium flows through the pipeline system from the parallel delivery pipe 2-20 and the left inlet of the three-way B3 to circulate, so that the heat-conducting medium does not pass through the user-end heat load heat exchanger 6 for heat exchange; when the temperature measured by the temperature sensor T5 is less than the lower temperature limit of the user-end heat load heat exchanger 6, the three-way solenoid valve S3 returns to the state before the last adjustment, and the heat-conducting medium enters the user-end heat load heat exchanger 6 through the delivery pipe 2-10 for heat exchange to supplement the heat that lacks the required temperature. Through the above repeated cycles, the heat demand of the system operation is maintained while completing the solar heat storage.

[0050] Example 7

[0051] Reference Figure 1-3 , the system releases the thermal energy stored by wind power, photovoltaic power and grid power during Example 6. In this process, the circulation path of the heat transfer medium in the pipeline system 2 is the same as that in Example 6. When the temperature T6 in the heat storage tank is greater than the maximum operating temperature of the collector 8, 110°C, the heat transfer medium circulates from the right port of the three-way solenoid valve S3 through the conveying pipe 2-2, without circulating through the collector 8. The system only releases heat through the heat storage tank to provide heat load to the user end, and other heating accessories in the pipeline system are suspended. It should be noted that in this process, there is a temperature difference in the phase change heat storage material in the heat storage tank, and wind power and photovoltaic power store heat in the heat storage tank at any time. When the temperature T6 in the heat storage tank is less than the maximum operating temperature of the collector 8, 110°C, and greater than the upper limit value of T5, the heat transfer medium circulates from the lower end outlet of the three-way solenoid valve S3 through the collector 8, without circulating through the conveying pipe 2-2. The system is accompanied by wind power, photovoltaic power and collector 8 heating and heat storage in the process of releasing heat.

[0052] When the temperature T6 in the heat storage tank is less than the upper limit value of T5 and greater than the value of T4, the heat stored in the heat storage tank 9 and the heat generated by the collector 8 are insufficient to meet the heat demand of the system user end; at this time, the electric heater 5-1 is started to heat to supplement the missing heat. When the temperature in the heat storage tank is less than the upper limit value of T4, the heat stored in the heat storage tank 9 and the heat generated by the collector 8 are even more insufficient. At this time, the electric heater 5-1 and the heat pump module 3 are started to heat, and the circulation path of the heat transfer medium is exactly the same as that of Example 2, and no longer passes through the delivery pipe 2-18, but instead passes through the delivery pipe 2-4 for circulation heat exchange.

[0053] Example 8

[0054] Reference Figure 1-3 In extremely cold and hot climates, the system uses off-peak power periods to store heat and off-peak power periods to release heat to maintain the daily heat demand of users in the system. In this process, the circulation path of the heat transfer medium in the pipeline system 2 is the same as that in Example 5.

[0055] In the utility model, when there is no clean energy environment, the system operates with the minimum energy consumption to maintain the heat load demand to ensure the rigid heat demand. At this time, the system first starts the heat pump module for the first heating, and then transfers the heat to the pipeline system through the low-level heat energy heat exchanger. When the temperature sensor in the pipeline system measures that the temperature meets the user's heating requirements, there is no need to start other power-consuming devices. When the temperature sensor in the pipeline system measures that the temperature is lower than the user's heating requirements, it is necessary to start the electric heater in the electric auxiliary heating heat exchanger for the second heating, and exchange the heat after the two heatings to the pipeline system, and then exchange the heat to the user through the heat load heat exchanger. In this process, the heat pump module and the electric auxiliary heating heat exchanger are coupled to heat. It should be noted that when designing the system, it is necessary to ensure that the heat load after the first and second heating meets the user's requirements; and the electric heater here adopts frequency conversion technology. When the temperature sensor detects that the second heating temperature is higher than the user's temperature requirement, the electric heater is turned off and started again when the temperature is low.

[0056] In the utility model, when the system is in use and transitions from a clean energy-free environment to a clean energy-enabled environment, the system preferentially utilizes clean energy to replace electric heating in heat pumps and electric auxiliary heating heat exchangers for heating. On sunny days during the day, as the temperature rises with sunrise, the vacuum tube solar collector absorbs more heat and the temperature rises. When the internal temperature is higher than the outlet temperature of the low-level thermal energy heat exchanger but lower than the outlet temperature of the electric auxiliary heating heat exchanger, the two-way three-way solenoid valve in the piping system described in the previous paragraph will switch the parallel vacuum tube solar collector liquid inlet, and the heat transfer medium enters the collector to absorb solar radiation heat; when the temperature of the solar energy absorbed by the collector is greater than or equal to the outlet temperature of the heat pump module, the collector can replace the heat pump to operate for heating, and at this time, the electric heater in the electric auxiliary heating heat exchanger continues to operate, realizing partial clean replacement of heating, and in this process, the coupling function of solar thermal and electric auxiliary heating heat exchanger heating is realized. As solar radiation increases, the collector temperature will further increase. When the collector absorbs heat and the temperature of the circulating heat transfer medium in the pipeline is higher than the outlet temperature of the electric auxiliary heating heat exchanger, the collector further absorbs solar energy heat equivalent to the heat generated by the electricity consumption of electric heating. At this time, the electric heater is turned off, and the system can meet the heating requirements of the user end only through the solar energy heat absorbed by the collector, thus achieving the goal of completely clean heating.

[0057] When the temperature rises further, the solar heat absorbed by the collector will increase. At this time, the user end cannot absorb the excess heat. The heat transfer medium in the pipeline system flows to the heat exchange coil in parallel with it and built into the heat storage tank through the two-way three-way solenoid valve. The excess heat absorbed by the collector that cannot be consumed by the user end is stored in the phase change heat storage material in the heat storage tank through the heat exchange coil. Since the absorbed heat in the phase change heat storage tank is large, when the heat absorption is too much and the heat provided to the user end in the pipeline system is insufficient, the above two-way three-way solenoid valve switches back to the original parallel pipeline, so that the heat transfer medium bypasses the heat storage tank to prevent further heat absorption. When the heat supply is excessive, the solenoid valve is opened again, and the cycle is repeated in sequence to achieve surplus light and heat storage. It should be noted that at this time, the heat storage tank only stores heat that is higher than the highest temperature of the user end and lower than the maximum operating temperature range of the solar thermal collector (60℃~110℃).

[0058] The above process system completes the heating switching and storage control from sunrise to noon. For the stage from noon to sunset, when the solar energy changes from the strongest to the weakest, the control strategy of the system is as follows:

[0059] During the period from midday to sunset, the collector temperature gradually drops from the highest point to the lowest temperature at the user end. On the one hand, the collector supplies the heat load at the user end of the system, and on the other hand, it continuously stores heat for the thermal storage tank. When the sunlight further weakens, when the temperature of the collector after absorbing heat is lower than the minimum temperature requirement at the user end, the heat of the temperature difference below the minimum requirement at the user end is supplemented by the heat stored in the thermal storage tank in the early stage.

[0060] Since the heat stored in the thermal storage tank can last for several hours after sunset, when the collector cannot heat the system without solar energy, the system solenoid valve controls the heat transfer medium not to pass through the collector. Through the transmission pipeline in parallel with the collector, the heat of the thermal storage tank system still relies on the release of the previously stored heat in the thermal storage tank. When the heat stored in the thermal storage tank is released to a temperature lower than the user-end temperature and the heat pump heating temperature, the system releases the previously stored heat from the thermal storage tank and couples it with the electric heater to provide heat to the user. When the thermal storage tank releases the previously stored heat to a temperature that still cannot meet the temperature requirements of the user after coupling with the electric heater, the system solenoid valve controls the heat transfer medium not to flow through the serpentine heat exchange pipeline in the thermal storage tank. Through another transmission pipeline in parallel with it, the system couples the heat pump and the electric heater in this process, and the two continue to provide heating to the user.

[0061] When the heat stored during the day on a sunny day is released under no light conditions, the system will use the weather forecast data to determine the weather conditions of the next day. If the weather on the next day is cloudy, rainy or snowy, the system will not be able to maintain system operation and store heat through solar thermal energy on the next day. The system will use the electric heater in the heat storage box to store the heat required for the next day's flat and peak systems during the night grid electricity valley period, so as to achieve the staggered use of economical grid electricity heating and heat storage. Similarly, when the system is running in continuous no light or insufficient light weather, refer to the above control strategy for heating and heat storage management. If the weather on the second day and thereafter is sunny, the system will give priority to consuming the heat in the heat storage box, and then use the grid electricity valley electric heat pump and the electric auxiliary heating heat exchanger to maintain the user-side heat load demand, and will not store heat through the grid electricity valley at night, so as to prevent the heat stored at night from being unable to be consumed under the conditions of sufficient light and heat during the sunny day, causing waste.

[0062] On this basis, wind power generation and photovoltaic surplus power are used as random green heat sources to achieve on-demand heating energy. The heat generated is heated by the electric heater in the thermal storage tank of the system. The heat energy is directly stored in the thermal storage tank and then exchanged to the user end through the pipeline system. Heat users can also match the system with special wind turbines or photovoltaic generator modules according to the advantages and disadvantages of the wind and solar resources at the installation location and economic evaluation, so as to maximize the economic utilization of clean energy in the region.

[0063] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-energy coupling heating heat storage system, comprising a delivery pump (1), a heat transfer medium circulation pipeline (2), delivery pipes 2-1 to 2-37, a heat pump heating module (3), a condenser (4), an electric auxiliary heating heat exchanger (5), an auxiliary electric heater 5-1, a heat load heat exchanger (6), a buffer tank (7), a solar collector (8), a heat storage tank (9), an electric heater 9-1, a wind-solar network switching control module (10), a temperature sensor T1, a stop valve J1-J6, a two-way three-way solenoid valve S1-S5, a ball valve Q1, a ball valve Q2, a three-way valve B1-B3, a temperature sensor T1-T6, and a calorimeter R1, characterized in that: The outlet of the delivery pump (1) is connected to the inlet of the delivery pipe 2-1 in the heat transfer medium circulation pipeline (2); a temperature sensor T1 and a pressure sensor P1 are provided in the middle of the delivery pipe; the outlet of the delivery pipe 2-1 is connected to the right inlet of a two-way three-way solenoid valve S1; the left outlet of the two-way three-way solenoid valve S1 is connected to the inlet of the delivery pipe 2-2; the outlet of the delivery pipe 2-2 is connected to the right inlet of a tee B1; the left outlet of the tee B10 is connected to the inlet of the delivery pipe 2-3; the outlet of the delivery pipe 2-3 is connected to the right inlet of the two-way three-way solenoid valve S2; the lower outlet of the two-way three-way solenoid valve S2 is connected to the inlet of the delivery pipe 2-4; the middle of the delivery pipe A temperature sensor T2 is provided at the position, the outlet of the delivery pipe 2-4 is connected to the inlet of the upper end of the tee B2, the right outlet of the tee B2 is connected to the inlet of the delivery pipe 2-5, the outlet of the delivery pipe 2-5 is connected to the inlet of the stop valve J3, the outlet of the stop valve J3 is connected to the inlet of the delivery pipe 2-6, a temperature sensor T3 is provided at the middle position of the delivery pipe, the outlet of the delivery pipe 2-6 is connected to the inlet of the condenser (4), the outlet of the condenser (4) is connected to the inlet of the delivery pipe 2-7, the outlet of the delivery pipe 2-7 is connected to the inlet of the stop valve J4, the outlet of the stop valve J4 is connected to the inlet of the delivery pipe 2-8, a temperature sensor T4 is provided at the middle position of the delivery pipe, the delivery pipe 2-8 The outlet is connected to the inlet of the electric auxiliary heating heat exchanger (5), the outlet of the electric auxiliary heating heat exchanger (5) is connected to the inlet of the delivery pipe 2-9, the outlet of the delivery pipe 2-9 is connected to the left inlet of the electromagnetic valve S3, the right outlet of the electromagnetic valve S3 is connected to the inlet of the delivery pipe 2-10, the outlet of the delivery pipe 2-10 is connected to the left inlet of the heat load heat exchanger (6), the right outlet of the heat load heat exchanger (6) is connected to the inlet of the delivery pipe 2-11, a temperature sensor T5 is provided in the middle of the delivery pipe, the outlet of the delivery pipe 2-11 is connected to the lower inlet of the tee B3, the upper outlet of the tee B3 is connected to the inlet of the delivery pipe 2-12, the upper outlet of the electromagnetic valve S3 is connected to the inlet of the delivery pipe 2-13, and the upper outlet of the electromagnetic valve S3 is connected to the inlet of the delivery pipe 2-14. The outlet of the delivery pipe 2-20 is connected to the inlet of the delivery pipe 2-20, the outlet of the delivery pipe 2-20 is connected to the left inlet of the tee B3, the outlet of the delivery pipe 2-12 is connected to the inlet of the stop valve J5, the outlet of the stop valve J5 is connected to the inlet of the delivery pipe 2-13, the outlet of the delivery pipe 2-13 is connected to the upper inlet of the buffer tank (7), the lower outlet of the buffer tank (7) is connected to the inlet of the delivery pipe 2-14, the outlet of the delivery pipe 2-14 is connected to the inlet of the stop valve J6, the outlet of the stop valve J6 is connected to the inlet of the delivery pipe 2-15, the outlet of the delivery pipe 2-15 is connected to the inlet of the delivery pump (1), and the outlet of the delivery pump (1) is connected to the inlet of the delivery pipe 2-1; The lower end outlet of the two-way three-way solenoid valve S1 is connected to the inlet of the delivery pipe 2-16, the outlet of the delivery pipe 2-16 is connected to the inlet of the stop valve J1, the outlet of the stop valve J1 is connected to the liquid inlet of the heat transfer medium of the solar collector (8), the liquid inlet and the liquid outlet of the heat transfer medium of the solar collector (8) form a complete circulation branch, the liquid outlet of the heat transfer medium of the solar collector (8) is connected to the inlet of the stop valve J2, the outlet of the stop valve J2 is connected to the inlet of the delivery pipe 2-17, and the outlet of the delivery pipe 2-17 is connected to the lower end inlet of the three-way valve B1; The left end outlet of the two-way three-way solenoid valve S2 is connected to the inlet of the delivery pipe 2-18, the outlet of the delivery pipe 2-18 is connected to the liquid inlet of the heat exchange coil 2-19 in the heat storage tank (9), the leakage outlet of the heat exchange coil 2-19 in the heat storage tank (9) is connected to the left inlet of the T-shaped three-way B3, a temperature sensor T6 is provided at the center of the bottom of the heat storage tank (9), and an electric heater 9-1 is provided at the core axis of the heat storage tank, and the wiring terminal of the electric heater 9-1 is connected to the circuit in the wind-solar network switching control module (10); The crude oil enters the heat load heat exchanger (6) from the delivery pipe 2-21, the ball valve Q1, and the delivery pipe 2-22 in sequence, and after being heated in the heat load heat exchanger (6), it flows out through the delivery pipe 2-23, the ball valve Q2, and the delivery pipe 2-23 in sequence.

2. The multi-energy coupling heating and thermal storage system according to claim 1, characterized in that: The heat pump heating module includes three different low-level heat sources, namely air source, industrial waste heat and ground source heat, and shares a set of heat transfer medium circulation pipelines, which include a compressor, a condenser, an expansion valve and a delivery pipe.

3. The multi-energy coupling heating thermal storage system according to claim 1, characterized in that: The inlet of the delivery pipe 2-25 is connected to the air heat source evaporator (12), the outlet of the delivery pipe 2-25 is connected to the right end inlet of the three-way solenoid valve S4, the upper end outlet of the three-way solenoid valve S4 is connected to the inlet of the compressor 13, the outlet of the compressor 13 is connected to the inlet of the delivery pipe 2-27, the outlet of the delivery pipe 2-27 is connected to the lower end inlet of the condenser (4), the lower end inlet and outlet of the condenser (4) are connected to the inlet of the delivery pipe 2-28, the outlet of the delivery pipe 2-28 is connected to the inlet of the expansion valve 14, the outlet of the expansion valve 14 is connected to the inlet of the delivery pipe 2-28, the outlet of the delivery pipe 2-29 is connected to the upper end inlet of the three-way B4, the left end outlet of the three-way B4 is connected to the inlet of the delivery pipe 2-30, and the outlet of the delivery pipe 2-30 is connected to the outlet of the air heat source evaporator (12).

4. The multi-energy coupling heating thermal storage system according to claim 1, characterized in that: The inlet of the delivery pipe 2-33 is connected to the left inlet of the three-way solenoid valve S5, the right outlet of the three-way solenoid valve S5 is connected to the inlet of the delivery pipe 2-34, and the outlet of the delivery pipe 2-34 is connected to the lower left inlet of the water / ground source heat evaporator (11); The lower right outlet of the water / ground source heat evaporator (11) is connected to the inlet of the delivery pipe 2-35, the inlet of the delivery pipe 2-35 is connected to the left inlet of the tee B5, the right outlet of the tee B5 is connected to the delivery pipe 2-36, the upper left outlet of the water / ground source heat evaporator (11) is connected to the inlet of the delivery pipe 2-32, the outlet of the delivery pipe 2-32 is connected to the lower inlet of the three-way solenoid valve S4, the lower outlet of the tee B4 is connected to the inlet of the delivery pipe 2-31, and the outlet of the delivery pipe 2-31 is connected to the upper right inlet of the water / ground source heat evaporator (11).

5. The multi-energy coupling heating and thermal storage system according to claim 1, characterized in that: The inlet of the delivery pipe 2-36 is connected to the right end inlet of the tee B5, the lower end outlet of the tee B5 is connected to the inlet of the delivery pipe 2-37, and the outlet of the delivery pipe 2-37 is connected to the lower end inlet of the three-way solenoid valve S5.

6. The multi-energy coupling heating thermal storage system according to claim 1, characterized in that: The delivery pump (1) is a delivery pump with adjustable speed.

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