In order to develop clean and efficient energy conversion technology, a novel combined cooling, heating and power (CCHP) system using biomass as fuel is proposed in this work. The proposed CCHP system consists of biomass gasification unit, solid oxide fuel cell (SOFC), engine power generation unit and absorption refrigeration unit. Thermodynamic model of the CCHP system is developed for the parametric and exergy analyses to evaluate the performance. The parametric analysis shows that increasing the steam to biomass ratio or the SOFC fuel utilization factor helps to improve the electrical efficiency, while the increase of air equivalent ratio has a negative effect. The exergy analysis shows that the two units of biomass gasification and engine power generation have the largest exergy destruction ratio, which is 46.9% and 16.8% under the biomass flux of 500 kg·h⁻¹. This is because these two units involve in high-temperature thermochemical reaction process, resulting in relatively large exergy destruction. Besides, the tradeoff between maximum exergy efficiency, CCHP efficiency and minimum total annual cost is conducted by multi-objective optimization. Through optimization, the system could reach the high CCHP efficiency of 75% and net electrical efficiency of 52%, as well as the low total annual cost of 410 k$ simultaneously. This work could provide the basic design idea, and high-efficiency and low-cost operation strategy for the practical application of the proposed novel biomass-fueled CCHP poly-generation system.

为了发展清洁高效的能源转换技术，这项工作提出了一种以生物质为燃料的新型冷热电联产系统。拟议的CCHP系统由生物质气化装置，固体氧化物燃料电池（SOFC），发动机发电装置和吸收式制冷装置组成。开发了CCHP系统的热力学模型，用于参数分析和火用分析以评估性能。参数分析表明，提高蒸汽/生物质比或SOFC燃料利用率有助于提高电效率，而增加空气当量比则具有负面影响。火用分析表明，生物质气化和发动机发电这两个单元的火用破坏率最大，分别为46.9％和16。^-1。这是因为这两个单元参与高温热化学反应过程，导致相对较大的火用破坏。此外，通过多目标优化在最大火用效率，CCHP效率和最小总年度成本之间进行权衡。通过优化，该系统可以达到75％的CCHP高效效率和52％的净电气效率，以及每年410k $的较低总成本。这项工作可以为提出的新型生物质燃料热电联产多联产系统的实际应用提供基本的设计思路，以及高效，低成本的运营策略。