Organic Rankine Cycle (ORC) is a modified Rankine cycle with working fluids, refrigerant made of organic material, such as pentane. Organic refrigerant, such as, pentane has low boiling point, therefore ORC can be used in power plant that uses low temperature resources, such as solar thermal exhausted gases and geothermal wells. ORC is used to convert heat energy into mechanical energy or electricity generated by a low temperature of the hot sun. In this study several working fluid has been used; HCR12, HCR22, HCR134a and pentane. Simulations of all those refrigerants have been performed on Rankine cycle for various inlet temperature and pressure with cycle tempo program. From the simulation study, with input turbine temperature of 70°C and pressure 2 bar, the maximum turbine power of 2.07 kW has been achieved. In this study turbocharger coupled with a generator is also used as an energy conversion system that convert the energy of motion into electrical energy output.