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Rashidi R.,Semnan University | Shariati A.,Semnan University | Shariati A.,Pars Oil And Gas Company | Moravvej Z.,Semnan University | Shiroudi A.,Ministry of Energy Renewable Energy Organization of Iran SUNA
Journal of Renewable and Sustainable Energy | Year: 2013

GSHP (through ground source heat pump) has been considered as one of the proposed solutions for the convenient energy supply for cooling and heating systems in recent decades. In Iran, the renewable energy organization as the pioneer organization is involved in localization and utilization of renewable energies. It has developed and installed some of these systems in various parts of the country. In this paper, the fundamentals of GSHPs and some related projects in Iran are reviewed. Then, GSHP is compared with commercially available heating/cooling split units economically. Results show that although the return of investment may take a long period, the GSHP units are profitable. © 2013 AIP Publishing LLC. Source


Shiroudi A.,Ministry of Energy Renewable Energy Organization of Iran SUNA | Taklimi S.R.H.,Linkoping University | Mousavifar S.A.,Ministry of Energy Renewable Energy Organization of Iran SUNA | Taghipour P.,Ministry of Energy Renewable Energy Organization of Iran SUNA | Taghipour P.,Islamic Azad University at Tehran
Environment, Development and Sustainability | Year: 2013

One of the most attractive features of hydrogen as an energy carrier is that it can be produced from water. Hydrogen has the highest energy content per unit mass as compared to chemical fuel and can be substituted. Its burning process is non-polluting, and it can be used in the fuel cells to produce both electricity and useful heat. Photovoltaic arrays can be used in supplying the water electrolysis systems by their energy requirements. During the daylight hours, the sunlight on the photovoltaic array converts into electrical energy which can be used for electrolyzer. The hydrogen produced by the electrolyzer is compressed and stored in hydrogen vessel and provides energy for the fuel cell to meet the load when the solar energy is insufficient. This study investigates a stand-alone power system that consists of PV array as power supply and electrolyzer. They have been integrated and worked at the Taleghan renewable energies' site in Iran. The National Renewable Energy Laboratory's Hybrid Optimization Model for Electric Renewables simulation software has been used to carry out the optimal design and techno-economic viability of the energy system. The simulation results demonstrate that energy system is composed of 10-kW PV array, 3.5-kW electrolyzer, 0.4-kW proton exchange membrane fuel cell, 2.5-kW inverter, and 60 batteries (100 Ah and 12 V). The total initial capital cost, net present cost, and cost of electricity produced from this energy system are 193,563 US$, 237,509 US$, and 3.35 US$/kWh, respectively. © 2013 Springer Science+Business Media Dordrecht. Source


Shiroudi A.,Ministry of Energy Renewable Energy Organization of Iran SUNA | Shiroudi A.,Hasselt University | Deleuze M.S.,Hasselt University | Mousavifar S.A.,Ministry of Energy Renewable Energy Organization of Iran SUNA
International Journal of Ambient Energy | Year: 2015

Hydrogen as an energy carrier is one of the most potential candidates for clean energy and can be produced by water electrolysis. The use of 10 kW photovoltaic arrays for supplying a 5 kW electrolyser which consists of 10 series-connected electrolyser stacks and a 28% alkaline (KOH) solution electrolyte has been investigated at the Taleghan renewable energies site in Iran. The hydrogen produced by the electrolyser provides energy for the 1 kW polymer electrolyte membrane fuel cell, which meets the load when the solar energy is insufficient. Variations of the solar radiation intensity, the hydrogen production rate, the solar hydrogen efficiency and the overall efficiency of the solar hydrogen energy unit were monitored in detail. The overall energy efficiency was found to range from 0.93% to 5.01%. The obtained results demonstrate the great potential of such a power system for producing and storing energy in a solar-belt country like Iran. © 2015 Taylor & Francis Source


Shiroudi A.,Ministry of Energy Renewable Energy Organization of Iran SUNA | Rashidi R.,Ministry of Energy Renewable Energy Organization of Iran SUNA | Rashidi R.,Semnan University | Gharehpetian G.B.,Amirkabir University of Technology | And 2 more authors.
Journal of Renewable and Sustainable Energy | Year: 2012

In respect to increasing demand for energy in the world and limited fossil fuel resources, there is a great need for using renewable energies (REs). One of the most attractive applications of RE technology is the application of hybrid energy systems in remote areas. An alternative to overcoming the intermittence of RE sources, such as the sun and wind (are freely available and environmental friendly), is to develop the hybrid energy system where excess electrical energy could be converted and stored. These sources combined with energy storage would provide a better system reliability making it suitable for stand-alone applications. They have been integrated and worked at the Taleghan renewable energies site in Iran. The National Renewable Energy Laboratorys hybrid optimization model for electric renewables simulation software has been used to carry out the optimal design and techno-economic viability of energy system in this study. The simulation results demonstrate that for hybrid energy system is consists of 0.8 kW PV modules, two wind turbines (0.4 kW each), 2.5 kW inverter, and 8 batteries (200 Ah and 12 V). The cost of energy is 1.655 US$/kWh, whereas the initial capital required, and net present costs are, 22998 US$ and 24623 US$, respectively. © 2012 American Institute of Physics. Source

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