Buried reflux casing type circulating geothermal heat exchanger and use thereof

Abstract

The invention discloses an underground reflux tube circulating geothermal energy exchanging device, which comprises the following parts: underground pipe, heat exchanging unit, circulating pump, heat-loading dielectric and circulating loop, wherein the underground pipe is underground reflux housing pipe of inner pipe in the outer pipe; the geothermal energy exchanging circulating loop provides heat or cold source for dielectric, which forms underground circulation loop through reflux pipe bottom, interlayer of inner and outer pipe or underground circulation.

Description

technical field [0001] The invention belongs to the field of air-conditioning energy saving and renewable energy utilization, and in particular relates to the technology and application of a soil-buried pipe type buried return sleeve type circulation geothermal heat exchange device. Background of the invention [0002] The water source and soil on the earth's surface are a huge solar heat collector, collecting 47% of the sun's energy, which is more than 500 times the energy used by human beings every year. The ground source heat pump system is a high-efficiency building energy-saving air-conditioning system that uses underground shallow ground energy, including groundwater, soil, or surface water, to provide both heating and cooling. By inputting a small amount of high-grade electric energy, low temperature The transfer of potential energy to high-temperature potential energy. Among them, water source heat pump is a heating and air conditioning system that uses the earth's s...

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Problems solved by technology

Therefore, the soil buried tube heat pump system maintains the advantages of the groundwater source heat pump using the earth as a cold and heat source, and at the same time does not need to extract groundwater as a heat transfer medium. It is a sustainable building energy-saving new technology with greater development prospects. , The buried tube type circulation geothermal heat exchange device can be used as a front-end coupling part of the soil buried tube heat pump system. Generally, according to the buried tube method of the buried heat exchanger, it can be divided into: horizontal buried tube, vertical buried tube and spiral coil tube , this kind of ground source heat pump system has relatively high requirements on the material and geological structure of the soil heat exchanger. Among them, the horizontal buried pipe occupies a large area and needs to be excavated. The influence of factors is large, and the stability of the system is low; the vertical buried pipe is less affected by the surface environment temperature, but the buried pipe is deep. The corresponding ground hole drilling costs and related material costs increase. The spiral coil covers a small area and relatively small investment, but it needs to be excavated. The heat transfer effect is between the former two, not as good as the vertical buried tube. The investment of tubular heat pump system is higher than that of other ground source heat pump methods, so this kind of system is generally only suitable for residential single buildings with relatively small area, and it is relatively difficult to apply in large-scale projects

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