A New Hybrid System Design for Thermal Energy Storage
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https://doi.org/10.1007/s11630-020-1292-4
Article ID: 1003-2169(2020)00-0000-00
A New Hybrid System Design for Thermal Energy Storage CEYLAN İlhan1, ALI Ismail Hamad Guma1, ERGÜN Alper1*, GÜREL Ali Etem2, ACAR Bahadır1, İSLAM Nursel1 1. Department of Energy Systems Engineering, Faculty of Technology, Karabük University, Karabük 78050, Turkey 2. Department of Mechanical and Manufacturing Engineering, Faculty of Technology, Duzce University, Düzce 81620, Turkey © Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: Due to some serious environmental problems like global warming and greenhouse effect, studies on solar energy systems are being conducted all over the world. The studies conducted in recent years are on hybrid designs in which solar energy systems can realize both electricity and heat production at the same time. In this way, both electrical energy and heat energy can be generated from the same system In this study, the design and analysis of a concentrated solar air collector with a heat storage unit were carried out.. In the solar air collector, heat energy was depot in paraffin wax, and the electrical energy which was stored in the battery using the PV (photovoltaic) modules in the system enabled the operation of the system fan. The experiments which aimed at determining system performance were carried out in winter when the ambient temperature was low. The experiments were performed with or without a heat storage unit, and a comparative analysis was made. It was found that the temperature of the air released from the collector ranged from 15°C to 40°C when the exterior temperature was −5°C. The average efficiency of the concentrated system without the heat storage unit was calculated as 67%. The average efficiency of the concentrated system with the heat storage unit was calculated as 96%.
Keywords: heat storage, phase change material, concentrated solar air collector
1. Introduction The interest in solar energy is increasing continually. Scientists are developing new technologies and methods to exploit this renewable resource. Solar energy has been used in many different applications over the years, one of the most important of which is heating applications with solar collectors. Solar radiation is transferred to fluid as heat energy with solar collectors. The most used fluid is water, since it has a high heat capacity. Today, air is also used in solar collectors. However, water is preferred as it transfers heat well. Although this situation prevents the Received: Apr 11, 2019
AE: RENNO Carlo
widespread use of solar air collectors, the increasing need for energy has shown that solar air collectors can also be used in different areas efficiently [1–3]. When the studies on solar air collectors are examined, it is seen that Zheng et al. [4] developed a mathematical model by examining the performance of a new metal corrugated packed air collector in buildings in cold areas. The study revealed that the use of metal corrugat
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