Fluid selection and parametric optimization of organic Rankine cycle using low temperature waste heat

Z.Q. Wang, N.J. Zhou, J. Guo and X.Y. Wang

Energy, 2012, vol. 40, issue 1, 107-115

Abstract: The paper presented a working fluid selection and parametric optimization using a multi-objective optimization model by simulated annealing algorithm. The screening criteria considered included heat exchanger area per unit power output (A/Wnet) and heat recovery efficiency (Ф). The independent parameters are the evaporation and condensation pressures, working fluid and cooling water velocities in tubes. A comparison of optimized results for 13 working fluids shows that boiling temperature of working fluids will greatly affect the optimal evaporating pressure. R123 is the best choice for the temperature range of 100–180°C and R141b is the optimal working fluid when the temperature higher than 180°C. When the exhaust temperature ranges from 100°C to 220°C, the optimal pinch point at evaporator is about 15°C. Economic characteristic of system decreases rapidly with heat source temperature decrease. When the heat source temperature is lower than 100°C, ORC technology is uneconomical.

Keywords: Optimization; Organic Rankine cycle; Working fluid; Low temperature waste heat (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (75)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:40:y:2012:i:1:p:107-115

DOI: 10.1016/j.energy.2012.02.022

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