Research Of Heat Exchange System On Low-power Stirling Engine

The problem of Environmental pollution and energy shortage has become the issues facing all countries in the world, the focus of current research is mainly focused on two aspects:On one hand, the low-power product development; on the other hand, new energy research, especially in the use of solar energy which is urgent particularly. The research mainly includes thermal and photovoltaic solar applications, including the use of solar thermal power generation has been more and more optimistic about the country. The world solar thermal power generation mainly in three forms, namely tower, trough and dish, especially equipped with a Stirling engine distributed dish solar thermal power technology which is regarded as the most promising technology, expected in the near future there will be a very broad prospects for development.The paper is researched on low-power Stirling engine heat exchanger system, and the body part selected the β-type single-cylinder gas-distribution structure, internal transmission part adopts the diamond-shaped transmission mechanism. Classic Schmidt analysis in the course of the study, the first to explore the principle of heat exchange within the Stirling engine, while drawing on the success cases of simulation results at home and abroad and has been published in accordance with the relevant empirical formula through theoretical analysis out of the engine in the work process in the presence of various resistance loss and heat loss. Then, through beta-type structure principle and the Stirling engine efficiency and power analysis, based on a given disc condenser is about to15kW, calculated the Stirling engine body structure and size parameters, press design conditions check the output power of4.21kW and thermal efficiency of28.1%, which meets the the design requirements that the power to3kW and effective thermoelectric conversion efficiency of more than20%.Next, the paper focuses on the forces and the law of motion of the single-cylinder (3type Stirling engine, explores the relationship between the design on the heat exchanger system with engine performance. The results show that a very important relationship between the engine performance and heat transfer system structure design and processing technology:analysis about the heat exchanger, the heat sink、regenerator and cooler’s parameters of engine power guide the design and efficiency of the law, which has some reference value when designing it; On the processing cycle, vacuum brazing technology and sealing machine transmission parts which had been stated in the paper are very important.