Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6681955 | Applied Energy | 2017 | 9 Pages |
Abstract
Combining thermoacoustic concepts with free piston Stirling systems, this paper puts forward a resonance tube-coupled duplex Stirling cooler which is thermally driven. The novel configuration consists of a free piston Stirling engine, a free piston Stirling cooler and a resonance tube to couple them. Possessing advantages of high exergy efficiency, high reliability and simple structure, it serves as a promising candidate for small scale natural gas liquefaction by burning a small part of natural gas to liquefy the rest and long lifetime space coolers. Using the off-the-shelf components in our laboratory, an experimental setup has been built and a no-load temperature of 110Â KÂ has been achieved. As the feasibility of the concept has been verified experimentally, further calculation was done to explore the potential of the configuration. Based on Sage software, the engine and the cooler subsystem were optimized respectively, then a system level numeric model was established and the performance of the system was studied. Among the numeric results, a heat-to-cooling-power exergy efficiency of 26.8% and a cooling power of 2.4Â kW were obtained at 110Â K with an inner diameter 60Â mm resonance tube, charging pressure of 6Â MPa, hot temperature of 923Â K, ambient temperature of 303Â K, working frequency of 75Â Hz.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
Xiaowei Li, Bin Liu, Guoyao Yu, Wei Dai, Jianying Hu, Ercang Luo, Haibing Li,