Biomass Based Organic Rankine Cycle: Thermodynamic Modeling for 20 kW Power Output Electricity Using R227ea and Toluene as Working Fluids

Suresh Baral

Page No. 47-54

The biomass based organic Rankine cycle of the 20 kW power output has been investigated and
thermodynamically modeled with the basic laws of thermodynamics. The two working fluids
selected for modeling which are R227ea and Toluene. The ORC system has efficiency 10.9 % and
11.1 % in addition to the heat input to the boiler is 186.1 kW and 178.45 kW when boiler inlet
temperature is 85 °C with R227ea and Toluene respectively. The thermal efficiency, pressure ratio,
mass flow rate of working fluids and boiler heat input varies according to the boiler input
temperature. This paper examines the variation in thermodynamic parameters when subjected to
change in temperature of working fluids.
Keywords: Biomass, Thermal efficiency, boiler heat input, working fluids.