CN-122015175-A - Thermal, cold, electric and water combined supply system with air energy and solar energy coupled by shallow geothermal energy

CN122015175ACN 122015175 ACN122015175 ACN 122015175ACN-122015175-A

Abstract

The invention belongs to the technical field of comprehensive utilization of energy, and relates to a heat, cold, electricity and water combined supply system for shallow geothermal energy coupling air energy and solar energy. According to the invention, surplus heat generated by the solar unit is stored into the buried pipe group through the second plate type heat exchanger, so that active heat compensation of underground soil is realized, heat deficiency is compensated, ground temperature balance is maintained, meanwhile, the low-temperature air source heat pump unit can be used for supplying heat independently or cooperatively with the ground source heat pump unit, the heat taking load and the operating pressure of the ground source heat pump unit are reduced, the gradient utilization of air energy and solar energy is realized by combining the hot water supply unit, the clean and efficient integrated supply of heat, cold, electricity and water in areas with unbalanced cold and hot loads is realized, the operating energy efficiency of the ground source heat pump unit is obviously improved, the long-term stable operation of the system is ensured, and finally the comprehensive performance of the whole synergistic system is greatly improved.

Inventors

LI XIAOQIONG
WANG PENG
LIU ZHIYI
GE SHAOYU
LI CHUNXIAN
GUO KUO
DUAN FUYUAN

Assignees

共益合创集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260324

Claims (7)

1. The utility model provides a shallow geothermal energy coupling air can and thermal-cold electricity water allies oneself with confession system of solar energy, includes solar energy unit and geothermal energy unit, solar energy unit is including photovoltaic photo-thermal assembly, first plate heat exchanger and the heating water tank that connects gradually, geothermal energy unit is including buried pipe crowd and at least one ground source heat pump unit that connects gradually, its characterized in that still includes: The heat storage unit comprises a second plate heat exchanger, wherein the second plate heat exchanger is respectively connected with the heating water tank and the buried pipe group, and the second plate heat exchanger is used for enabling hot water in the heating water tank to exchange heat with geothermal water in the buried pipe group, so that the geothermal water is stored in the buried pipe group after the temperature of the geothermal water is increased, and heat storage is carried out; The air energy adjusting unit comprises a low-temperature air source heat pump unit, wherein the low-temperature air source heat pump unit is used for supplying heat to a user independently or in combination with the ground source heat pump unit; The hot water supply unit comprises a low-temperature air source hot water unit and a heat storage water tank which are sequentially connected, the heat storage water tank is connected with a heating water tank, hot water in the heating water tank enters the heat storage water tank for storage, and the low-temperature air source hot water unit utilizes air energy to improve the quality of the hot water in the heat storage water tank and then supplies hot water to a user.
2. The heat, cold, electricity and water combined supply system for coupling air energy and solar energy by using shallow geothermal energy according to claim 1, wherein the outlet of the buried pipe group is connected with a first inlet of a third plate heat exchanger, the first outlet of the third plate heat exchanger is connected with the inlet of the buried pipe group, and the second inlet and the second outlet of the third plate heat exchanger are connected with a user side.
3. The heat, cold, electricity and water combined supply system for coupling air energy and solar energy by using shallow geothermal energy according to claim 2, wherein the outlet of the buried pipe group is provided with a water collector, the inlet of the buried pipe group is provided with a water separator, the outlet of the water collector is respectively connected with the first inlet of the ground source heat pump unit, the first inlet of the second plate heat exchanger and the first inlet of the third plate heat exchanger, and the inlet of the water separator is respectively connected with the first outlet of the ground source heat pump unit, the first outlet of the second plate heat exchanger and the first outlet of the third plate heat exchanger.
4. The heat, cold and electric water combined supply system for coupling air energy and solar energy through shallow geothermal energy according to claim 3, wherein an outlet of the water collector is connected with a first inlet of a ground source heat pump unit, a first inlet of a second plate heat exchanger and a first inlet of a third plate heat exchanger through a first circulating pump, a second inlet of the ground source heat pump unit, an inlet of a low-temperature air source heat pump unit, a second inlet of the third plate heat exchanger and a user side are connected through a second circulating pump, a first outlet of the heating water tank is connected with a second inlet of the second plate heat exchanger through a third circulating pump, an outlet of the photovoltaic photo-thermal assembly is connected with a first inlet of the first plate heat exchanger through at least one fourth circulating pump, a second inlet of the first plate heat exchanger is connected with a second outlet of the heating water tank through a fifth circulating pump, a first outlet of the heat storage water tank is connected with an inlet of the low-temperature air source heat pump unit through a sixth circulating pump, and a second outlet of the heat storage water tank is connected with a user side through a constant pressure pump.
5. The system for combining heat, cold and electricity and water by coupling air energy and solar energy through shallow geothermal energy according to claim 4, wherein the inlet of the second circulating pump is connected with the outlet of the soft water tank through the using side constant pressure water supplementing unit, the inlet of the first circulating pump is connected with the outlet of the soft water tank through the ground source side constant pressure water supplementing unit, and the inlet of the soft water tank is connected with a water source through a water softener.
6. The heat, cold, electricity and water combined supply system for coupling air energy and solar energy by using shallow geothermal energy according to claim 1, wherein the third inlet of the heating water tank is connected with a water source through a silicon-phosphorus crystal water treatment device.
7. The shallow geothermal energy-coupled air energy and solar energy combined heat, cold, electricity and water supply system according to claim 1, wherein the photovoltaic and photo-thermal assembly is connected with a power grid through an inverter.

Description

Thermal, cold, electric and water combined supply system with air energy and solar energy coupled by shallow geothermal energy Technical Field The invention belongs to the technical field of comprehensive utilization of energy, and relates to a heat, cold, electricity and water combined supply system for coupling air energy and solar energy by using shallow geothermal energy. Background With the deep advancement of the concept of energy conservation and emission reduction and the rapid development of renewable energy source utilization technologies, the comprehensive energy supply field of buildings is increasingly urgent in requirements on clean, efficient and multi-element energy supply modes. The shallow soil geothermal energy is used as a renewable clean energy source with abundant reserves and wide distribution, and is combined with a solar energy-formed heat, cold, electricity and water combined supply system, so that the advantage of integration of building heat supply, cold supply, hot water supply and power supply can be realized, and the energy-saving system becomes an important development direction in the field of building energy conservation. The solar energy mainly bears the functions of supplying hot water and supplying power, can be operated in cooperation with the ground source heat pump, and the core utilization equipment is a photovoltaic photo-thermal component. At present, when the ground source heat pump and the photovoltaic photo-thermal assembly work cooperatively, the heat generated by the photovoltaic photo-thermal assembly preheats the ground heat water through the heat exchanger in winter, so that the ground heat water is lifted and enters the ground source heat pump to supply heat for a building after being lifted again, and the electric energy generated by the photovoltaic photo-thermal assembly is integrated into a power grid in summer, so that the ground source heat pump releases the heat in the building to the ground to realize refrigeration. However, because the winter building heating requirement in the area of unbalanced cold and hot load is high and the summer refrigerating requirement is low, the heat extracted from the shallow soil in winter of the ground source heat pump system is far greater than the heat released into the soil in summer, and the summer refrigerating load is far smaller than the area of winter heating load, the long-term operation easily causes the continuous decrease of the underground soil temperature, the ground temperature balance is destroyed, the operation energy efficiency of the ground source heat pump unit is obviously reduced, the long-term stable operation of the system is influenced, and finally the comprehensive performance of the whole synergistic system is severely restricted. Disclosure of Invention The invention aims to provide a heat, cold, electricity and water combined supply system of shallow geothermal energy coupled with air energy and solar energy, which can adapt to the requirements of high heating in winter and low cooling in summer in areas with unbalanced cold and hot loads, realize clean and efficient integrated supply of heat, cold, electricity and water for buildings in the areas, ensure long-term stable operation of the system and improve the operation energy efficiency of a unit. In order to achieve the above purpose, the technical scheme provided by the invention is as follows: The utility model provides a shallow geothermal energy coupling air can and thermal-cold electricity water allies oneself with confession system of solar energy, includes solar energy unit and geothermal energy unit, and solar energy unit is including photovoltaic photo-thermal subassembly, first plate heat exchanger and the heating water tank that connect gradually, and geothermal energy unit is including buried pipe crowd and at least one ground source heat pump unit that connects gradually, still includes: the heat storage unit comprises a second plate heat exchanger, the second plate heat exchanger is respectively connected with the heating water tank and the buried pipe group, and the second plate heat exchanger is used for enabling hot water in the heating water tank to exchange heat with geothermal water in the buried pipe group, so that the geothermal water temperature is increased and then stored in the buried pipe group for heat storage; The air energy adjusting unit comprises a low-temperature air source heat pump unit, wherein the low-temperature air source heat pump unit is used for supplying heat to a user independently or in combination with the ground source heat pump unit; The hot water supply unit comprises a low-temperature air source hot water unit and a heat storage water tank which are sequentially connected, the heat storage water tank is connected with a heating water tank, hot water in the heating water tank enters the heat storage water tank for storage, and the low-temperature air source hot water unit utilizes air e