Abstract
This paper presents a techno-economic analysis of hybrid renewable energy systems (HRES) to supply the electrical load requirements of the Central Library of Istanbul Esenyurt University located in Istanbul, Turkey. The standalone HRES (PV/Wind/Fuel Cell/Electrolyzer, PV/Fuel Cell/Electrolyzer and Wind/Fuel Cell/Electrolyzer etc.) considered in the analysis were comprised of different combinations of PV modules, Fuel Cell and wind turbines supplemented with hydrogen storage. Meanwhile, wind and solar energy potential in Esenyurt region in Istanbul is fairly appropriate for supplying energy requirements of some places with no high electricity load like libraries. In this study, the HOMER software is used as the assessment tool to determine the optimal configuration of HRES taking total net present cost (NPC) and cost of energy (CoE) into consideration. As a result, it is determined that the optimal system configuration of standalone Wind/PV/Fuel Cell/Electrolyzer hybrid renewable power generation system with the lowest total NPC consists of 25kW PV array, 40kW Wind turbine, 20kW Fuel Cell, 25kW power converter, 50kW electrolyzer and 100kg hydrogen tank and also that total NPC and CoE of the optimal configuration are estimated to be $809,442, $2.040/kWh, respectively. Renewable fraction of the hybrid system is 100%. Electricity generated through this hybrid system is completely clear and no harmful emission gases in this hybrid system are generated and there is no contribution of the HRES to the pollution of environment.
Highlights
Efficient utilization of domestic wind and solar energy potential in some places like schools, libraries, universities, etc. has been more popular
Thanks to the HOMER software, in the optimization process, several different system configurations can be simulated, the infeasible configurations can be discarded, the feasible configurations can be ranked based on the total net present cost (NPC), and the most feasible one with the lowest total NPC and cost of energy (CoE) as the optimal system configuration can be viewed[18]
In the current case where average solar irradiance and average wind speed are almost 4.28 kWh/m2/d and 5.64 m/s, respectively; The optimal system configuration with the lowest total NPC consists of 25kW PV array, 40kW Wind turbine, 20 kW Fuel Cell 25kW, power converter 20kW, 50kW electrolyzer and 100kg hydrogen tank
Summary
Efficient utilization of domestic wind and solar energy potential in some places like schools, libraries, universities, etc. has been more popular. HRES are fairly useful method for the following reasons: assessment of the regional renewable energy potential, reduction in energy dependency and green energy generation They contain renewable based power suppliers such as wind and solar energy to meet the great variety of electricity demands, small or large demand. They presented two scenario and investigated from the techno-economic point of view by using HOMER tool is used to define the optimum size of the equipment based on the geographical and meteorological data of the island They resulted that the increasing potential of the renewable energy sources, such as annual average wind speed or solar radiation, decreases both CoE and NPC[13]. All the results obtained from the calculations in the HOMER software are analyzed economically and environmentally
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