Through experiment, the relation figures of engine rotation speed, coefficient of performance of heat pump and engine thermal efficiency are presented and analyzed.
通过实验，得出了发动机转速与热泵性能系数、发动机热效率的关系曲线，并进行了分析。
The effects of preheater stage and air-leakage coefficient on bi-series thermal efficiency are also researched, its regular patterns are of guide to the development of new type of preheater system.
针对预热器级数、漏风系数对双系列热效率的影响展开研究，其规律对新型预热器系统的开发具有指导意义。
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