Energy, economic and environmental dynamic response characteristics of organic Rankine cycle (ORC) system under different driving cycles

Xu, Ping; Yang, Fubin; Zhang, Honggang; Xing, Chengda; Wang, Chongyao; Zhang, Wujie; Wang, Yan

doi:10.1016/j.energy.2022.123438

Cited by 28 publications

(1 citation statement)

References 46 publications

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“…The existing research cannot obtain an optimal working fluid to meet the requirements of different temperatures and working conditions. Ping et al [7] selected R245fa to analyze the dynamic corresponding characteristics of ORC under different driving cycles. Abbas et al [8] selected cyclohexane and cyclopentane from 37 working fluids.…”

Section: Working Fluid Selectionmentioning

confidence: 99%

Performance Prediction and Working Fluid Active Design of Organic Rankine Cycle Based on Molecular Structure

et al. 2022

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Working fluid selection is crucial for organic Rankine cycles (ORC). In this study, the relationship between molecular structure and ORC performance was established based on the quantitative structure–property relationship (QSPR) and working fluid parameterized model (WFPM), from which an ORC working fluid was actively designed. First, the QSPR model with four properties, namely, critical temperature (Tc), boiling point (Tb), critical pressure (pc), and isobaric heat capacity (cp0), was built. Second, the evaporation enthalpy (hvap), evaporation entropy (svap), and thermal efficiency (η) were estimated by WFPM, and the results were compared with those using REFPROP to verify the calculation accuracy of the “QSPR+WFPM” coupling model. The average absolute relative deviations of evaporation enthalpy and entropy are below 8.44%. The maximum relative error of thermal efficiency is 6%. Then, the thermodynamic performance limit of ORC and corresponding thermophysical properties of the ideal working fluid were calculated at typical geothermal source conditions. Finally, the active design of the working fluid was conducted with the ideal working fluid Tc and pc as the target. The research shows that C3H4F2 and C4H3F5 are optimal working fluids at 473.15 and 523.15 K heat sources, respectively.

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Section: Working Fluid Selectionmentioning

confidence: 99%