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Affiliation of Author(s):能源与动力学院

Journal:Appl Therm Eng

Abstract:Miniature engines are competitive devices for portable energy consumption. Experiments reveal that the thermal efficiency of a micro internal combustion swing engine (MICSE) is much poorer in comparing with other conventional-scale counterparts. In this work, we study the size effect and the various factors, such as the combustion rate, mass leakage, friction and heat dissipation, affecting the performance of MICSE. The results indicate that the combustion rate mainly distorts thermodynamic process path while the others, including mass leakage, friction and heat dissipation, mainly reduce the compression ratio of the engine. It is also found that these factors tangle with each other in a nonlinear and complex manner through compression ratio. With the reduction of the engine size, this influence of factors on MICSE become more critical and the efficiency drops dramatically as a result. © 2018 Elsevier Ltd

ISSN No.:1359-4311

Translation or Not:no

Date of Publication:2018-01-01

Co-author:yhf,zj

Correspondence Author:sb