Results of the first law thermodynamics analysis, exergy analysis and energy grade theory show that the primary energy ratio of GEHP is 1.
对燃气机热泵的热力学第一定律、分析和能级平衡理论分析结果表明：其一次能源利用率可达1。
In the paper, a new method of pipe networks analysis using a nodal energy grade method is developed.
本文提出了配水管网水力计算中的节点水头法。
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