Shallow geothermal energy utilization device and usage method thereof

Abstract

The invention discloses a shallow geothermal energy utilization device and a usage method thereof, and belongs to the technical field of geothermal energy utilization. In a scheme of the invention, shallow underground heat is transferred into a phase change heat transfer box through a conduction plate, sand in a heat transfer medium quickly absorb heat and continuously heat up water, with increaseof heat, an elastic capsule ball expands thermally and makes a thermal rotor overcome tension of an elastic string to rise and contact with a thermal stator, thus, thermal energy is transmitted to athermal storage medium, an inner wall of a heat exchange groove is fabricated to be similar as a surface of a lotus leaf, thus, the inner wall has super hydrophobicity, possibility of adhering the sand and the water on the inner wall of the heat exchange groove is reduced, the heat transfer medium is prepared through mixing of the water and the sand in proportion of 2:1, thermal storage temperature of the heat transfer medium is improved, possibility of great loss of the stored heat also can be reduced, the sand can be dispersed by stirring in a process of moving up and down and transferring heat of the thermal rotor, and efficiency of transferring heat to the water of the thermal rotor is improved.

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. Since 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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