The investigations on heat engine driven heat pump utilizing natural gas are now come in for people ' s attention with the vast popularization use of natural gas in our country and the power crisis caused by large use of electric air conditioning 随着天然气在我国的广泛使用和电力空调引发的电力危机，利用天然气的热机热泵的研究逐渐受到重视。
In comparison with standing - wave heat engine , it has lower onset temperature and higher pressure ratio , which is of great significance for introducing a variety of energies of low quality into thermoacoustic engines , such as solar energy , waste vapor energy and so on 该热声发动机比纯驻波型热声发动机具有更低的起振温度、更大的压比及更高的热声转换效率。
Some novel results are obtained , which will not only provide some theoretical bases for the optimal design and performance improvement of real thermodynamic cyclic equipments such as ferroelectric refrigerators , magnetic refrigerators and gas heat engines but also promote the development of new fields such as gas refrigerators for ultra - low temperature applications , molecule refrigerators and laser refrigeration technologies 这些结论将对铁电制冷机、磁制冷机、气体热机等实际的热力学循环装置的优化设计或性能改善提供理论指导，对极低温下的气体制冷机、分子制冷机和激光制冷技术等新领域也将所启发和促进。
