Thermal‐economic analysis of a transcritical Rankine power cycle with reheat enhancement for a low‐grade heat source

摘要: SUMMARY A thermal-economic analysis of a transcritical Rankine power cycle with reheat enhancement using low-grade industrial waste heat is presented. Under the identical operating conditions, compared to non-reheat baseline respect specific net output, thermal efficiency, exchanger area, and total capital costs systems. Detailed parametric effects are investigated in order maximize performance minimize system unit cost per work output. The main results show that value optimum pressure maximizing output approximately equal one causes same expansion ratio across each stage turbine. Relative improvement by process over augmented an increase high but decrease turbine inlet temperature. Enhancement for more significant than efficiency under condition, because input increased process. economic reveals respective optimal pressures minimizing area much lower energy performance. comparative identifies range conditions when proposed effective baseline. Copyright © 2012 John Wiley & Sons, Ltd.