SET Proceedings 2978-4387 Caravel Press 10.65582/set.2009.094 2009.094 Characterization of Natural Convection Heat Transfer in Two New Microencapsulated Phase Change Material Slurries for Low Temperature Energy Storage DiaconuBogdan M. diaconu@utgjiu.ro VargaSzabolcs OliveiraArmando C. New Energy Technologies Unit, Faculty of Engineering, University of Porto, Portugal Engineering Faculty, University “Constantin Brâncuşi”, Tg-Jiu, Romania 31082009 8 978-3-9813246-1-7 1 6 31 August 2009 © 2009 Copyright WSSET 2009

Thermal properties of a new type of microencapsulated phase change material slurry (MPCMS) were evaluated with the purpose of developing a cold storage system for solar-driven air conditioning applications. An experimental test rig was designed and built for experimentally determining the MPCMS heat transfer coefficient. Two types of MPCMS, with different values of PCM mass concentration, were tested. A higher value of the heat transfer coefficient was found for the MPCMS with a lower PCM microcapsules concentration. For both types of MPCMS a higher value of the natural convection heat transfer coefficient was found in the phase transition temperature range

 Phase change material slurry natural convection heat transfer helically coiled tube 31 August to 3 September 2009 8th International Conference on Sustainable Energy Technologies SET2009 8 Aachen, Germany