Thermo-economic optimization of biomass-fired organic Rankine cycles combined heat and power system coupled CO2 capture with a rated power of 30 kW

Fei-yang Zhang, Yong-qiang Feng, Zhi-xia He, Jing-wei Xu, Qiang Zhang and Kang-jing Xu

Energy, 2022, vol. 254, issue PC

Abstract: Combining organic Rankine cycle (ORC) and biomass direct combustion to form a combined heating and power system (CHP) is a feasible technology to realize small biomass power generation. A small-scale biomass-fired ORC-CHP system with a rated power of 30 kW is proposed and the thermo-economic optimization under two operation strategies is discussed. The effects of key operating parameters on exergy efficiency and levelized energy cost (LEC) are analyzed. Meanwhile, a single-objective optimization for maximum exergy efficiency or minimum LEC is addressed, and a further thermo-economic optimization is examined. The Pareto-optimal solutions using three decision makings are yielded and compared. Research demonstrates that the exergy efficiency of model A increases with condensation temperature, while the exergy efficiency of model B first increases, reaches the peak, and then slightly decreases. The split ratio has a significant effect on model B. The Pareto-optimal solutions from TOPSIS decision making are selected because of its lowest deviation index. The Pareto optimal solution for models A and B in pairs of (exergy efficiency, LEC) are (19.69%, 0.2968) and (19.75%, 0.2975), respectively. Compared to model A, model B presents higher thermodynamic performance and slightly lower economic performance.

Keywords: Organic Rankine cycle (ORC); Biomass-fired ORC-CHP; Exergy efficiency; Thermo-economic optimization; Decision makings (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:254:y:2022:i:pc:s0360544222013366

DOI: 10.1016/j.energy.2022.124433

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