三级恒温沼气冷热电联供系统的热力学分析

摘要

根据能量梯级利用原理,设计了一套将生物质发酵和常规冷热电联供高效有机结合的三 级恒温沼气冷热电联供系统,对系统进行热力学分析,并与传统分供系统相比较.结果表明,该系统 一次能源利用率为77.36％;一次能源利用率增量为49.17％；一次能源节约率为32.96％；(火用)效率为 28.9％,具有良好的节能减排能力和较大的社会经济效益.%The combined cooling, heating, and power(CCHP) system with the three-stage thermostatic biogas system was proposed and investigated. Its thermodynamic analysis was made and evaluated, as compared with the performances of the conventional separate system. Results show that the primary energy rate was 77. 36% ,added by 49.17%. The primary energy-saving rate was 32. 96%,and the exergy efficiency was 28. 9%. Hence,the cogeneration system has a large potential for energy saving,environmental protection and social and economic benefits.