Combined heat exchange system for solar and geothermal energy

Abstract

The invention discloses a heat exchange system in combined operation of solar energy and geothermal energy. The heat exchange system comprises a solar heat collector, a buried pipe heat exchanger, a heat pump unit, an absorbing type refrigerating unit, a user end, a plurality of hot water tanks, a plurality of water pumps, a plurality of connection pipes and a plurality of valves, wherein the solar heat collector is communicated with a first hot water tank, the first hot water tank is connected with a second water tank and an auxiliary heater via a second water pump so as to form a loop, the buried pipe heat exchanger is communicated with the heat pump unit, the heat pump unit is connected with the buried pipe heat exchanger and the first hot water tank via a third water pump so as to form a loop, the user end is connected with the heat pump unit and the absorbing type refrigerating unit via a fourth water pump so as to form a loop. The heat exchange system in combined operation of the solar energy and the geothermal energy has the advantages that unbalance problem of soil heat is effectively solved, cooling in summer, heating in winter and supplying of domestic hot water for all year around for buildings are achieved on the basis that the solar energy and the geothermal energy are utilized efficiently, and the heat exchange system is flexible to operate and adjust and diversified in functions.

Description

technical field [0001] The invention relates to a heat supply system, in particular to a heat exchange system operated jointly by solar energy and geothermal energy. Background technique [0002] Most of the existing combined operation systems of solar energy and ground source heat pump use the ground source heat pump system for cooling in summer, and the combined heating of solar heat pump and ground source heat pump in winter. [0003] However, in some areas, such as in southern my country, the cooling load required by buildings in summer is much greater than the required heat load in winter, and there is a soil imbalance when the ground source heat pump is used alone for cooling (the heat absorbed by buried pipes from the soil in winter throughout the year less than the heat output in summer), and the heat pump unit is often the heating capacity is greater than the cooling capacity. [0004] When selecting a unit, if the unit is selected according to the cooling load stan...

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Problems solved by technology

[0003] However, in some areas, such as in southern my country, the cooling load required by buildings in summer is much greater than the required heat load in winter, and there is a soil imbalance when the ground source heat pump is used alone for cooling (the heat absorbed by buried pipes from the soil in winter throughout the year less than the heat output in summer), and the heat pump unit is often the heating capacity is greater than the cooling capacity

[0004] When selecting the unit, if the unit is selected according to the cooling load standard in summer, the heating capacity of the unit will greatly exceed the heat load demand of the building. If the unit is selected according to the heating load standard in winter, the cooling capacity in summer will be insufficient

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