Experimental and Techno-Economic Analysis of Solar-Geothermal Organic Rankine Cycle Technology for Power Generation in Nepal

Table 3

Summary for validation of the referenced and current work for thermal efficiency [13, 16, 22].

Description of the system	Thermal efficiency (referenced work)	Thermal efficiency (current work)	Percentage in deviation (%)
Hybridized ORC with a solar trough parallel with geothermal has been analyzed; operating pressure 2.7 MPa and temperature 145°C; DNI 1000 W/m^2; working fluid isobutene; turbine isentropic efficiency 86%; power output 28 MW	17.9% [13]	19.2%	7.26%
Established an experimental platform for a solar-geothermal energy coupling power generation system; optimal evaporation temperature 88°C; DNI 947 W/m^2; working fluid R245fa; turbine isentropic efficiency 75%; power output 184.13 kW	11.21% [16]	13.6%	21.32%
Analyzed two micro-CHP systems operating with geothermal and solar energy; operating temperature at 80-100°C and pressure 3.1 MPa; DNI 730 W/m^2; working fluid R134a; power output 40 kW	13% [22]	13.9%	6.92%