Heat transfer enhancement in latent heat thermal storage systems Comparative study of different solutions and thermal contact investigation between the exchanger and the PCM.pdfVIP

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Heat transfer enhancement in latent heat thermal storage systems Comparative study of different solutions and thermal contact investigation between the exchanger and the PCM.pdf

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Heat transfer enhancement in latent heat thermal storage systems Comparative study of different solutions and thermal contact investigation between the exchanger and the PCM.pdf

Applied Energy 166 (2016) 107–116 Contents lists available at ScienceDirect Applied Energy journal homepage: /locate/apenergy Heat transfer enhancement in latent heat thermal storage systems: Comparative study of different solutions and thermal contact investigation between the exchanger and the PCM Kevin Merlin a,b,?, Didier Delaunay a, Jér?me Soto a,b, Luc Traonvouez c a Université de Nantes, Nantes Atlantique Universités, CNRS, Laboratoire de Thermocinétique de Nantes, UMR 6607, La Chantrerie, rue Christian Pauc, BP 50609, 44306 Nantes Cedex 3, France b Institut Catholique d’Arts et Métiers de Nantes, 35 avenue du Champ de Man?uvres, 44470 Carquefou, France c Insula France, 57 rue des Vignerons, 44220 Cou?ron, France highlights A comparison between different LHTS systems is investigated. A thermal characterization of the PCM and the ENG/PCM composite is performed. The exchanger using an ENG matrix has the highest heat transfer coef?cient. An enthalpy model is developed for heat transfer simulation in the LHTS. An identi?cation of the thermal contact resistance is performed. article info Article history: Received 9 October 2015 Received in revised form 23 December 2015 Accepted 10 January 2016 Available online 23 January 2016 Keywords: Latent heat thermal storage Heat transfer enhancement Experimental heat exchangers performances comparison Phase change material characterization Expanded natural graphite Thermal contact resistance identi?cation abstract Latent heat storage is a very ef?cient technique because of the high energy density of Phase Change Materials (PCM). However, these materials have low thermal conductivities which limit their use for industrial applications requesting a large power density. The purpose of this study is to present an experimental thermal energy storage using a phase change material associated with various con?gurations of conductive structures: ?nned exchangers, graphite powder and Expanded Natural Graphite (ENG) matrix. T