Ground source heat pump system for force seepage

Abstract

The invention discloses a ground source heat pump system for force seepage. The system comprises a refrigerant subsystem for refrigerating / heating a user subsystem, and a geothermal heat exchange subsystem for transferring cold / heat to the refrigerant subsystem, wherein the geothermal heat exchange subsystem is provided with a heat exchange medium main supply pipe and a heat exchange medium main return pipe; and the geothermal heat exchange subsystem comprises an underground well water heat exchange circulating loop, a buried pipe heat exchange circulating loop and an underground water seepage circulating loop which are respectively connected with the heat exchange medium main supply pipe and the heat exchange medium main return pipe so as to form a circulating loop. By the ground source heat pump system for the force seepage, soil serves as a heat / cold source of a ground source heat pump, the underground water is fully utilized as the heat / cold source of the ground source heat pump, the cold / heat exchange capacities of the whole set of ground source heat pump system are improved, and aims of energy saving, high efficiency and stable operation are fulfilled.

Description

technical field [0001] The invention relates to the technical field of ground source heat pumps, in particular to a ground source heat pump system for forcing underground water to flow. Background technique [0002] Environmental pollution and energy crisis around the world have made people turn their attention to clean and environmentally friendly renewable energy. In recent years, heat pump air-conditioning technology has gradually become a new direction of air-conditioning systems in the construction industry. Among them, the widely used ground source heat pump system includes underground soil heat exchanger ground source heat pump system, ground water heat pump system and surface water heat pump system. Due to the lack of groundwater resources in most areas of our country, the soil source heat pump system using soil as the heat (cold) source of the heat pump will be more applicable. The data show that the soil temperature below 5m basically does not change with the ext...

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Problems solved by technology

The commonly used forms of horizontal buried pipes are single-ditch single-pipe, single-ditch double-pipe, single-ditch two-layer double-pipe, single-ditch two-layer four-pipe, single-ditch two-layer six-pipe, etc. The advantage of horizontal buried pipe is that it is usually shallow buried. The initial investment is small, and its disadvantages are: ① Due to the shallow depth of the buried pipe, the performance of the buried pipe heat exchanger is not as good as that of the vertical buried pipe; ② During construction, it takes up a lot of space; Matching, or using spiral pipe is not easy to construct

[0005] The geothermal heat exchanger subsystem of the traditional ground source heat pump has the following characteristics: low heat transfer capacity, non-close contact between the soil and the buried pipe, low heat transfer coefficient, and because the groundwater is basically in a static state, it is not conducive to heat transfer

The temperature gradient is large. Due to the small thermal conductivity of the soil, the heat of the soil farther away from the buried pipe needs a larger temperature gradient to transfer the heat to the buried pipe side, resulting in a decrease in the temperature of the buried pipe side.

And due to the constant change of temperature gradient, it is easy to lead to changes in geological conditions, which will deteriorate the working condition of the heat pump system

Only rely on the soil to obtain heat passively, and the heat is obtained in a single form, which cannot make full use of the heat of groundwater

[0006] There are many defects in the geothermal heat exchanger subsystem of traditional ground source heat pumps: ①The heat transfer capacity of a single well is low, and the number of wells needs to be drilled; ②The radiation surface of a single well is small, and the distance between wells is relatively short, generally 4 to 5 meters, which has a great impact on geology; ③The temperature gradient is large, which affects the balance of geological conditions in the same horizontal plane. Large, unstable working conditions of the main engine, high energy consumption, and low efficiency; ⑤Cannot use the heat of groundwater; ⑥Large initial investment and high operating costs

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