Construction and preliminary test of a biomass-fired organic Rankine cycle system for heat and power system

Yong-qiang Feng, Kang-jing Xu, Zi-xu Liu, Hao-shui Yu, Tzu-Chen Hung and Zhi-xia He

Energy, 2024, vol. 308, issue C

Abstract: The organic Rankine cycle (ORC) combined heat and power (CHP) system, driven by biomass direct-fired hot water boilers, can effectively address the technical challenges of miniaturizing biomass power generation system. In this study, a biomass-fired ORC-CHP system using biomass as a stationary heat source and R123 as the working fluid is experimentally analysed. The effect of evaporation pressure on ORC thermal efficiency and comprehensive energy utilization efficiency is examined. Results indicate that the maximum exergy loss of 15.129 kW is obtained by the evaporators 1 and 2, which accounts for 63.943 % of the total system exergy loss. The evaporator 3 owns an exergy loss of 6.769 kW, whereas the minimum exergy loss of 0.154 kW is yielded by pump. The maximum electrical power is 782 W with a generation efficiency of 37 % for an evaporation pressure of 10 bar. The ORC thermal efficiency increases along with the evaporation pressure, with values varying between 8 % and 11 %, while the system comprehensive energy utilization efficiency tends to decrease and then increase, ranging between 79 % and 85 %.

Keywords: Organic Rankine cycle (ORC); Combined heat and power (CHP); Exergy loss; Thermal efficiency; Comprehensive energy utilization efficiency (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:308:y:2024:i:c:s0360544224027956

DOI: 10.1016/j.energy.2024.133021

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