A shallow geothermal energy utilization device and its application method

Abstract

The invention discloses a shallow geothermal energy utilization device and its use method, which belong to the technical field of geothermal energy utilization. The scheme transfers the shallow underground heat to a phase change heat transfer box through a conduction plate, and the sand in the heat transfer medium Rapidly absorb heat, and continue to heat the water, and as the heat increases, the elastic balloon expands, causing the thermal mover to rise against the tension of the elastic string and contact the thermal stator, thereby transferring heat energy to the thermal storage medium, which can Realize by imitating the inner wall of the heat exchange tank to be similar to the surface of the lotus leaf, making it super-hydrophobic, thereby reducing the possibility of sand and water adhering to the inner wall of the heat exchange tank, and making a heat transfer medium by mixing water and sand at a ratio of 2:1 , which can not only increase the heat storage temperature of the heat transfer medium, but also reduce the possibility of a large amount of stored heat being lost. When the thermal mover moves up and down to transfer heat, it can disperse the sand and improve the efficiency of its temperature transfer to water.

Description

technical field [0001] The invention relates to the technical field of geothermal energy utilization, and more specifically relates to a shallow geothermal energy utilization device and a method for using the same. Background technique [0002] Shallow geothermal energy is a kind of clean energy. In the exploration of shallow geothermal energy, on the basis of ascertaining shallow geothermal energy resources, according to the selected mining and utilization plan, the environment for the design, construction and operation of shallow geothermal energy utilization projects Impact assessment should evaluate and predict the positive and negative environmental effects that may be caused by system construction and operation, and provide scientific basis for the management of geological environment. The shallow ground temperature can use the scope of environmental impact assessment to meet the needs of protecting the geological environment. It should be determined based on a compreh...

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Problems solved by technology

[0004] In the prior art, when using shallow geothermal energy (temperature is less than 25°C), the heat transfer material usually used is water or sand. Because the specific heat capacity of water is large, the temperature of water rises slowly. Although the specific heat capacity of sand is small, it is heating up. At the same time, the cooling of the block is also fast, so part of the heat energy will be lost during the transfer process, which reduces the conversion efficiency of geothermal energy

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