Experimental performance investigation of modified cavity receiver with fuzzy focal solar dish concentrator |
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| Affiliation: | 1. Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, Tamilnadu 600036, India;2. Department of Mechanical Engineering, National Institute of Technology Puducherry, Karaikal, India;1. Department of Mechanics of Biosystem Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;2. Department of Renewable Energies, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran;3. Department of Mechanics of Biosystem Engineering, Tarbiat Modares University, Tehran, Iran;1. Department of Energetics and Process Technique, Faculty of Mechanical Engineering, University in Niš, Serbia;2. School of Mechanical Engineering University of Birmingham, Birmingham, B15 2TT, UK;3. The University of Mosul, Mechanical Engineering Department, Ninawa, Iraq;4. National Technical University of Athens, School of Mechanical Engineering, Athens, Greece;1. Department of Mechanic of Biosystems Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;2. Department of Mechanic of Biosystems Engineering, Tarbiat Modares University, Tehran, Iran;3. Department of Renewable Energies, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran;1. Faculty of Mechanical Engineering, Department of Energetics and Process Technique, University in Niš, Nis, Serbia;2. Department of Biosystem Engineering, Tarbiat Modares University, Tehran, Iran;3. Thermal Department, School of Mechanical Engineering, National Technical University of Athens, Zografou, Heroon Polytechniou 9, 15780 Athens, Greece;4. Photonics Center, Institute of Physics, University of Belgrade, 11080 Belgrade, Serbia;5. Faculty of New Science and Technologies, University of Tehran, Tehran, Iran;1. School of Energy and Power Engineering, HUST, Room 101 Power Building, Wuhan 430074, China;2. PROMES-CNRS Laboratory, 7 rue du Four Solaire, 66120 Font-Romeu-Odeillo-via, France;3. China-EU Institute for Clean and Renewable Energy, HUST, Wuhan, China |
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| Abstract: | In this paper, thermal performance analysis of 20 m2 prototype fuzzy focal solar dish collector is presented. The focal image characteristics of the solar dish are determined to propose the suitable design of absorber/receiver. First, theoretical thermal performance analysis of the fuzzy focal solar parabolic dish concentrator with modified cavity receiver is carried out for different operating conditions. Based on the theoretical performance analysis, the total heat loss (conduction, convection and radiation heat losses) from the modified cavity receiver is estimated. It is observed that the maximum theoretical efficiencies of solar dish collector are found to be as 79.2% for no wind conditions and 78.2% and 77.8% for side-on and head-on winds speed of 5 m/s respectively. Latter, real time analysis of parabolic dish collector with modified cavity receiver is carried out in terms of stagnation test, time constant test and daily performance test. From stagnation test, the overall heat loss coefficient is found to be 356 W/m2 K. The time constant test is carried out to determine the influence of sudden change in solar radiation at steady state conditions. The daily performance tests are conducted for different flow rates. It is found that the efficiency of the collector increases with the increase of volume flow rates. The average thermal efficiencies of the parabolic dish collector for the volume flow rate of 100 L/h and 250 L/h are found to be 69% and 74% for the average beam radiation (Ibn) of 532 W/m2 and 641 W/m2 respectively. |
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| Keywords: | Solar dish concentrator Modified cavity receiver Focal flux distribution Performance test Stagnation test Time constant |
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