Exergy, economic, and exergoenvironmental analyses of new combined heat and power process based on mechanism analysis of working fluid screening

Lili Wang, Li Xia, Chengyun Li, Yuan Tian, Junfeng Teng, Xiaoyan Sun and Shuguang Xiang

Energy, 2023, vol. 262, issue PA

Abstract: A screening strategy was established for obtaining an optimal working fluid (R1234yf) based on quantum chemical analysis. The weak hydrogen bond interactions of R1234yf enhanced the performance of the organic Rankine cycle. The proposed process produced 49.28 MW of electricity and 0.5 MPa of steam. The optimal process was evaluated by multifactor analysis of exergy, economic, and exergoenvironmental performance. Exergy analysis demonstrated the exergy loss to be 37.92% and the power system to be greater than that of the heating system. The exergy losses of the turbine, the evaporator and condenser for the organic Rankine cycle reach maximum values of 19.17%, 4.48%, and 4.72%, respectively. Economic analysis indicated that the operating cost and total annual cost of the proposed process were $ 2.37 × 106 and $14.01 × 106, respectively. Among the equipment, the cost of the condenser was the highest due to the large heat transfer area. Exergoenvironmental analysis proved that the exergy destruction effect on the environment was the lowest when maintaining the outlet temperature at 38 °C.

Keywords: Quantum chemical analysis; Low temperature waste heat; Combined heat and power system; Multifactor analysis (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:262:y:2023:i:pa:s0360544222021922

DOI: 10.1016/j.energy.2022.125308

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