Stirling engine and heat exchange method thereof

Abstract

The invention provides a Stirling engine and a heat exchange method thereof. The Stirling engine comprises a crank shaft, expansion cylinders, compression cylinders, a heat exchanger and an air cooler. The heat exchanger comprises a heat cavity, multiple work medium cavities and multiple rotation columns. Cold and hot work mediums are in mutual countercurrent flow, and the heat cavity and the workmedium cavities at least share the outer side wall of the same rotation column as the respective inner wall. The air cooler comprises a first cooling channel. The expansion first cylinder and the first compression cylinder can be alternately compressed when the crank shaft rotates. Working work mediums perform surface heat exchange in the work medium cavities and do not need to be filled with heat retainer materials, and a heat storage and release function of a heat regenerator can be achieved. The situation is avoided that due to too small gaps of heat retainers, the flow resistance of the work mediums is large, and multiple problems are caused. High-temperature hot air energy is sufficiently used through countercurrent flow heat exchange. The heat exchange method of the Stirling engineis suitable for heat exchange of the Stirling engine under a high-temperature environment and achieves high comprehensive heat efficiency.

Description

technical field [0001] The invention relates to the field of high-temperature heat exchange in the heat transfer aspect of special engineering, in particular to a Stirling engine and a heat exchange method thereof. Background technique [0002] The Stirling engine is a closed-cycle engine heated by external combustion, which has five outstanding advantages: [0003] ①. The wide spectrum of fuel, because it is heated by external combustion, it can adapt to various gases, liquids, solid fuels, solar energy and waste heat. [0004] ②.Theoretical cycle thermal efficiency is high, which is closest to the thermal efficiency of Carnot cycle. [0005] ③. Simple structure, no intake and exhaust valve system. [0006] ④. Low noise, neither the deflagration noise of the internal combustion engine nor the screaming noise of the steam turbine airflow. [0007] ⑤.Because it belongs to the closed cycle working fluid, it can run under pressure, which can effectively reduce the volume of ...

AI Technical Summary

Problems solved by technology

Obviously, the above requirements not only cannot be realized simultaneously in practice, but also contradict each other in design theory and cannot be satisfied at the same time, so the regenerator is another key element restricting the performance of the Stirling engine

[0012] For more than 200 years since 1816, the Stirling engine has experienced the unremitting efforts of countless experts, but it has not solved the heater and regenerator problems that restrict the development of the Stirling engine, and has not yet achieved a major application breakthrough. The main performance When the engine power ≦ 100KW, the comprehensive thermal efficiency ≤ 35%

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