تحليل انرژي، اگزرژي- اقتصادي - زيست محيطي سيكل رانكين آلي داراي كلكتورهاي متمركزكننده ي خورشيدي فتوولتائيك/ حرارتي

Energy an‎d Exergoeconomic an‎d Exergo-Environmental Analyses of an Organic Rankine Cycle with Concentrated Photovoltaic/Thermal Collector

مهندسي مكانيك

Energy has an important role in the economy an‎d development of industries of the countries. In Iran an‎d other countries in the world, annual energy consumption has a high cost regarding economical an‎d environmental issues. Therefore, recovery wasted heat in different divisions of industry that have energy wasting an‎d also using accessible energy sources in nature such as wind, water an‎d solar energy can have a good impact on economy. In this research, the main objective is to identifying the capacity of heat wasting an‎d to reclaim an‎d reuse them. In this regard, combination of two systems which are Organic Rankine an‎d Concentrating Photovoltaic-Thermal that include two domains of heat loss an‎d also potentials of improving efficiency of the cycle regarding energy, exergy, exergoeconomy an‎d exergo-environment has been modeled an‎d studied by EES software. In this research, Biphenyl has been used as operational fluid an‎d heat transferring fluid in Organic Rankine Cycle an‎d also molten salt has been used for storing heat in Thermal energy storage. Required solar parameters including solar radiations have been received from aerology base. Results of Energy, Exergy, exergoeconomy an‎d exergo environment an‎d also parametric analysis is included in results section. Results in energy section show that with the increase in absorbing energy, electrical potency increases linearly from 200 to 2600 kWh per day an‎d exiting heat also increases linearly from 1200 to 11600 kWh per day an‎d the suggested system can produce constant power with the usage of renewable an‎d wasted thermal sources. Moreover, the portion of useful generated heat is larger compared to wasted heat in most of the days in a year that shows the efficiency of thermal section of Concentrating Photovoltaic-Thermal system. Exergic analysis shows that the largest portion of irrevocability among the components was in the day with the most solar radiations in the year an‎d related to the turbine with 8200 kWh per day. Additionally, condenser with 84% has the highest exergic efficiency. From the economical point of view, the economical exergic results of the project showed that Concentrating Photovoltaic-Thermal Collector due to financial costs an‎d the more input thermal exergy compared to other components with 22$ per day has the highest irrevocability cost an‎d condenser has the largest portion of exergy unit cost that is producing 1 kWh effective exergy in each unit. Economical indexes of the project including simple payback period which is 5 years an‎d 3 months, has made the project economically reasonable. From the environmental point of view, the results show that in the exergo-environmental section, two components of wasted thermal exergy an‎d chemical thermal exergy, altogether, the largest portion is for Concentrating Photovoltaic-Thermal Collector an‎d also the results reveal that the pure generative potency of the system, exergo-environmental amount per each kWh pure generated power is from 0.23 to 0.13 kWh decreasing. Components such as Concentrating Photovoltaic-Thermal Collector an‎d thermal reclaiming boiler have a positive role in reducing environmental Bar of the system due to the reduction of consumption of fossil fuel an‎d reclaiming wasted heat.

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