A kind of Stirling thermoelectric power generation mechanism

Abstract

The invention discloses a stirling thermoelectric generation mechanism which belongs to the energy field, mainly faces thermoelectric generation and aims at utilizing low-temperature difference residual heat or residual cool. A steam engine based on Rankine cycle utilizes high-pressure steam generated in the water gasification process to push a steam turbine to do work, and the heat energy is converted into the electric energy, so that the steam engine is usually used for recovering industrial residual heat with the temperature being 400-600 DEG C; as for the residual heat with the temperature lower than 200 DEG C, an organic working substance with the boiling point smaller than that of water is adopted, namely an organic Rankine cycle residual heat power generation technology is adopted, but complex thermodynamic process including phase transition of the organic working substance is involved, so that the system has a complex structure, is high in cost and is not widely applied in China at present. According to the stirling thermoelectric generation mechanism disclosed by the invention, with the traditional stirling engine as a basis, a novel gas distribution piston structure made of a heat conductive material is added, the heat exchange efficiency of working gas and residual heat or residual cool storage working substance is improved, the residual heat or residual cool with a temperature difference lower than 200 DEG C is recovered, and the problems of complex structure and high cost caused by phase transition of the organic working substance are solved.

Description

[0001] Technical field: [0002] The invention belongs to the field of compressed air energy storage and utilization, and relates to a thermal power conversion system of a liquid air energy storage system. [0003] Background technique: [0004] Energy consumption in my country's industrial sector accounts for about 70% of the country's total energy consumption, and the average unit energy consumption of major industrial products is about 30% higher than the international advanced level. my country's energy utilization rate is only about 33%, which is about 10% lower than that of developed countries. At least 50% of industrial energy consumption is directly discarded as various forms of waste heat. [0005] Classified by temperature range: [0006] High temperature waste heat: above 600°C; [0007] Medium temperature waste heat: 300~600℃; [0008] Low temperature waste heat: below 300°C. [0009] Classified by waste heat source: [0010] (1) Flue gas waste heat: large hea...

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Problems solved by technology

[0021] For thermal power conversion technology, the Rankine cycle of organic working fluid is used, which involves complex thermal processes such as the phase transition of organic working fluid. The system structure is complex and the cost is high. It has not been widely used in China at present.

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