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中文摘要：
本文分析各子系统性能和补燃量对冷热电联产系统总体性能的影响，得到了与分产系统相比联产系统节能所需满足的条件，并建议采用以联产系统燃料量为基准的节能系数评价联产系统性能。通过对回收的热量在制冷子系统和供热子系统中的分配情况研究，确定了回收热量优先利用的原则。补燃量的增加将导致联产系统性能下降，到一定程度使联产系统与分产系统相比不具有优势；随着电网供电效率的提高，确保联产系统节能所需的联产系统发电效率也不断提高。
英文摘要：
Analyzing the effects of both the subsystems performances and the supplemental fuel on the performance of the combined cooling, heating and power （CCHP） system, the condition that enable CCHP to save energy could be identified. Here, it is suggested that the CCHP system should be evaluated by a criterion of FESF （fuel energy saving factor）, and the fuel amount of CCHP is chosen as the basis in the parameter. After analyzing how to distribute the recovery of thermal energy to the cooling subsystem and the heating subsystem, the preferential distribution mode could be determined to obtain better system performance. As supplemental fuel amount increasing, the performance of the CCHP system will descend. When the performance of the electric grid is improved, the electric efficiency of the CCHP system will be increased to save energy.
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