However, with the lower load factor, engine speed is limited to the minimum speed run, part of the system for the heat is wasted, a lower utilization.
但随着负荷率的降低，发动机转速被限制在最小转速下运行，系统的一部分供热量被浪费，一次能利用率降低。
The author cites a heat energy utilization factor which distinguish reasonable and unreasonable use in energy system.
在文章中引出热能利用系数，并通过热能利用系数值来鉴别一些不合理的利用能量系统。
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