Heat exchange device for energy pile used under winter working condition and heat exchange method thereof

Abstract

The invention belongs to the technical field of heat exchange of energy piles, in particular to a heat exchange device for an energy pile used under a winter working condition and a heat exchange method of the heat exchange device. The heat exchange device for the energy pile comprises a refrigeration device and a circulation device, wherein the refrigeration device comprises a cart, a condenser,a gas compressor and a freon storage tank are arranged on the cart, a freon storage tank outlet communicates with a gas compressor inlet through a first pipeline, and a gas compressor outlet communicates a condenser inlet through another first pipeline; and the circulation device comprises a heat preservation water tank, and a second pipeline is arranged in the heat preservation water tank. The heat exchange device for the energy pile is stable, efficient and capable of continuously exchanging heat and can be used for the TPT and TRT tests.

Description

technical field [0001] The invention belongs to the technical field of energy pile heat exchange, and in particular relates to an energy pile heat exchange device and a heat exchange method thereof under winter working conditions. Background technique [0002] Ground source heat pump technology is an air-conditioning system that uses geothermal energy in shallow soil or water sources as a cold (heat) source, but the construction cost of drilling and buried pipes for ground source heat pump technology is high, and it takes up a lot of underground space, which limits its development. In recent years, engineers and technicians have combined foundation piles in conventional construction pile foundations with ground source heat pump heat exchange tubes to form a new type of foundation pile, namely energy piles. Energy piles can not only meet the requirements of pile foundation mechanical properties, but also The heat exchange between the superstructure and the shallow ground ener...

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Problems solved by technology

[0002] Ground source heat pump technology is an air-conditioning system that uses geothermal energy in shallow soil or water sources as a cold (heat) source, but the construction cost of drilling and buried pipes for ground source heat pump technology is high, and it takes up a lot of underground space, which limits its development. In recent years, engineers and technicians have combined foundation piles in conventional construction pile foundations with ground source heat pump heat exchange tubes to form a new type of foundation pile, namely energy piles. Energy piles can not only meet the requirements of pile foundation mechanical properties, but also The heat exchange between the superstructure and the shallow ground energy can be realized through the circulation of the heat exchange fluid in the buried pipe of the pile body. When the energy pile is used in summer, the heat in the superstructure is transferred to the shallow soil or water source through the heat pump unit. In winter, the shallow soil heat is transferred to the superstructure; in the existing winter working conditions, the heat exchange tube in the energy pile is connected to the water tank, and the ice-water mixture is placed in the water tank, and the ice-water mixture circulates in the heat exchange tube in the water tank. The liquid is cooled, so that the circulating fluid flowing into the energy pile is in a low-temperature state, so as to achieve the purpose of circulating the low-temperature heat exchange fluid in the heat exchange tube, but because the ice-water mixture put into the water tank cannot be at a stable temperature, resulting in The temperature of the circulating fluid is unstable, which not only consumes a lot of manpower and material resources, but also has low operating efficiency, so the existing technology needs further improvement

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