This paper presents detailed energy and exergy analysis and comparison of low-grade solar
heat source powered superheated and saturated organic Rankine cycle (ORC) using
zeotropic mixture butane/R1234ze. The required expression to evaluate the power output,
first law efficiency exergetic efficiency, exergy destruction, and required heat exchangers
area are coded in Matlab 2015a interfaced with REFPROP 9.0. Moreover, saturated and
superheated ORCs are further optimized by genetic algorithm by selecting exergetic …