With the increasing consumption of the primary energy, the shortage of energy source is more and more seriousrnall around the world. Thus renewable energy has become a hotspot for its clean, renewable and efficient advantages. Thernbiogas producing system with multi-energy coupled renewable energy was designed based on the thought of multi-energyrncomplement arities and comprehensive cascaded energy utilization, and the main devices of the system were selected. Thernenergy utilization, exergy efficiency and economic efficiency of the system were analyzed by a case calculation, whichrnproved that the system was feasible. The investment recovery period of the system was 2.5 years, the energy utilization raternwas 60% , and the exergy efficiency was 57%.%一次能源的消耗不断加大,使世界能源紧缺的现状更加严峻,而可再生能源以其清洁、再生、高效的优势逐渐成为人们研究的热点.基于多能互补、能量梯级综合利用的思想,设计了多能耦合可再生能源制沼气系统,并对该系统的主要装置进行了选型.通过实例计算,分析了该系统的能量利用率、火用效率和经济效益,表明该系统是可行的.该系统的投资回收期为2.5年,能量利用率达到60％,火用效率达到57％.
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