Microchannel heat exchange-based waste-heat direct power generation device

Abstract

The invention provides a microchannel heat exchange-based waste-heat direct power generation device, which comprises a thermoelectric material, a microchannel heat exchanger, a working medium pump, an ordinary heat exchanger and a pipeline, wherein a cold end of the thermoelectric material is in tight contact with the microchannel heat exchanger; the working medium in a microchannel is R30 or R21; the working medium and the cold end of the thermoelectric material are subjected to efficient boiling heat exchange; and the cold end is maintained in a stable low-temperature condition, so that the thermoelectric conversion efficiency is ensured. The boiling working medium brings heat to the ordinary heat exchanger through the working medium pump and then heat exchange is carried out on the working medium and the environment, so that the working medium is liquefied. The microchannel heat exchange device is a copper rectangular thin plate; a plurality of microchannels are arranged in the microchannel heat exchange device; round holes or square holes are selected as the microchannels according to the practical application; and an air-cooled heat exchanger, a water-cooled heat exchanger or a ground source heat exchanger is selected as the ordinary heat exchanger according to the actual condition. The temperature of the cold end of the thermoelectric material is controlled by combining the microchannel heat exchanger and the working medium in a boiling heat exchange manner and is kept at a stable low temperature; the power generation efficiency of the thermoelectric material is improved; and the service lifetime of the thermoelectric material is prolonged.

Description

technical field [0001] The invention relates to a waste heat direct power generation device, in particular to a waste heat direct power generation device based on microchannel heat exchange. Background technique [0002] With the development of microchannel heat exchangers, it has certain applications in the fields of microelectronics technology, aviation, chemical industry, and energy. Microchannel heat exchangers have different characteristics compared with conventional scale equipment, such as small volume, light weight, and high efficiency, because the characteristic scale is at the micron level. It is precisely because of these advantages that the microchannel heat transfer technology is constantly developing, and the application field is constantly expanding. [0003] Nowadays, semiconductor material technology is developing rapidly, and various semiconductor materials are constantly appearing. According to the Seebeck principle, when there is a temperature differenc...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a waste heat direct power generation device based on microchannel heat exchange to solve the problem of controlling the temperature of the cold end of the semiconductor to not change with the increase of the temperature of the hot end in the process of using semiconductor power generation

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