Organic Rankine Cycle power system applicable in rural areas of developing countries: an approach to appropriate technology

Abstract

Small scale solar organic Rankine cycle is a promising renewable energy generation technology for rural areas in developing countries. Depending on the application, various working fluids are possible. 1 kW scroll expander, two

Thermodynamic modeling of the compact heat exchanger, diaphragm pump and solar panel was carried out. In this paper, we investigated 15 operating fluids suitable for solar thermal applications. R134a and R245fa were found to be suitable for low to moderate solar organic Rankine cycle cogeneration systems. We have developed prototypes for the development of installation systems in remote locations and tested changes in performance characteristics with varying heat source temperatures. A series of laboratory tests were performed to verify cycle efficiency and expander output. Based on the experimental data, exergy destruction and exergy efficiency of each component of the system were evaluated. In addition, changes in energy efficiency and exergy efficiency of the system due to changes in operating parameters such as evaporation pressure, condensation pressure, superheat, reference temperature, inflator inlet temperature and pressure ratio are shown. And showed good performance and good performance. The 121 oC heat source is expected to deliver an output of approximately 1.4 kW. In the next chapter of the paper, economic and thermal economics analyzes were conducted to determine the cost per kWh of the solar organic Rankine cycle system: $ 0.68 / kWh and $ 0.29 / kWh for the prototype and low cost solar organic Rankine cycle, respectively Respectively. Sensitivity analysis was performed to confirm the effect of changes in net present value as a result of changes in economic variables. Smallsmôl