TJ593 : Exergy and Exergo-economic Analysis of solar Organic Rankine cycle by using Thermal Storage with Phase Change Material
Thesis > Central Library of Shahrood University > Mechanical Engineering > MSc > 2018
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Abstarct: Due to population growth and the increasing demand for electricity in the industry and households as well as the disadvantages of fossil fuels in electricity generation, such as pollution and the release of harmful emissions to the environment, and their exhaustible issues faced human beings to renewable energies. Organic Rankine Cycles are an appropriate technology for the conversion of low quality thermal energy to electrical power. In this research, the organic Rankine cycle driven by evacuated tube collector was studied from energy, exergy and exergo-economic points of view. Then, various cases such as the temperature and pressure input to the turbine, the pinch temperature difference of the evaporator of the organic cycle and the solar flux were evaluated. Simulation results show that power energy and exergy efficiencies are 4.84% and 9.33% for summer and 6.79% and 12.16% for winter respectively. Solar collector, auxiliary boiler and the storage tank are the most important components from the exergo-economic point of view, due to the high initial cost rate and Exergy destruction. Parametric analysis result shows that the temperature increase in evaporator has a positive effect on cycle operation and, the increase in pinch point temperature difference of evaporator has a negative effect on cycle operation. From the economic point of view, the increase in evaporator and pinch point temperature difference of evaporator causes a decrease in capital coast rate. Also, the solar radiation change finds to have a positive effect on system operation, baxsed on exergy-economic point of view, which causes an increase in energy and exergy efficiency.
Keywords:
#Exergo-economic #Organic Rankine cycle #Solar collector #Thermal Storage #Parametric study #Renewable energy Link
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
Visitor: