M.Sc. Tezi Görüntüleme | |||||||||||||||||||||
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| Summary: Fossil fuels serving as primary energy source today are not unlimited in the amount. Furthermore, the emissions related to the use of fossil fuels result in so many environmental problems. For these reasons, studies on both energy efficiency enhancement of current energy sources and improvement of renewable energy utilization systems have became very important. Using thermal energy storage systems can be considered as one of the important ways of efficient energy utilization. Among the thermal energy storage systems, latent heat storage systems are superior because of their high density energy storage capacity at a nearly constant phase change temperature. In this study, a triple concentric-tube heat exchanger type heat storage system is considered. In the apparatus it is assumed that the phase change material (PCM) located in the annulus formed by the innermost tube and the middle tube melts by exchanging heat with a fluid flowing in the innermost tube and in the outer annulus and the energy storage is accomplished in this way and the thermal behavior of energy storage system under consideration is investigated numerically.
Key Words: Phase Changing Materials, Latent Heat Storage, Heat Exchangers, Moving Boundary Problems, Enthalpy Method, Finite Difference Method, Alternating Direction Implicit Method | |||||||||||||||||||||