Abstract
AbstractThis paper presents a model to evaluate the performance of a solar-powered organic Rankine cycle (ORC). The system was evaluated in Jackson, MS, using five dry organic working fluids, R218, R227ea, R236ea, R236fa, and RC318. The purpose of this study is to investigate how hourly temperature change affects the electricity production and exergy destruction rates of the solar ORC, and to determine the effect of the working fluid on the proposed system. The system was also evaluated in Tucson, AZ, to investigate the effect of average hourly outdoor temperatures on its performance. The potential of the system to reduce primary energy consumption and carbon dioxide emissions is also investigated. A parametric analysis to determine how temperature and pressure of the organic working fluid, the solar collector area, and the turbine efficiency affect the electricity production is performed. Results show that the ORC produces the most electricity during the middle of the day, when the temperatures are the h...
Highlights
Organic Rankine cycles (ORCs) are Rankine cycles that use an organic working fluid instead of water
Since ORCs generate power from low-temperature heat, they can be implemented as power generation units for waste heat recovery systems, geothermal applications, and solar applications
Previous work has been done in the solar ORC area, the objective of this paper is to further study the performance of a solar-powered ORC that uses a two-axis tracking flat-plate solar collector instead of an evaporator in the ORC system
Summary
Organic Rankine cycles (ORCs) are Rankine cycles that use an organic working fluid instead of water. Since ORCs generate power from low-temperature heat, they can be implemented as power generation units for waste heat recovery systems, geothermal applications, and solar applications These applications only produce a relatively small amount of electricity; ORCs are ideal for small-scale power generation applications. In another study, Mago, Chamra, Srinivasan, and Somayaji (2008) performed a firstand second-law analyses on a regenerative ORC using four dry fluids. They found that regenerative ORC produces higher efficiency compared with the basic ORC while reducing the amount of waste heat required to generate the same power with a lower irreversibility
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