Publisher : The Society of Air-Conditioning and Refrigerating Engineers of Korea
DOI : 10.6110/KJACR.2016.28.1.015
Title & Authors
An Experimental Study on the Heat Transfer Characteristics of a Finned-Tube Heat Exchanger in a PCM Thermal Energy Storage System Jung, Dong Il; Chang, Min; Kim, Yongchan;
Phase change materials (PCM) are able to store a large amount of latent heat, and can be applied to thermal energy storage systems. In a PCM, it takes a long time to store heat in the storage system because of the low thermal conductivity. In this study, a finned-tube-in-tank heat exchanger was applied to a PCM thermal energy storage system to increase heat transfer efficiency. The effects of geometric and operating parameters were investigated, and the results were compared with those of the tube-in-tank heat exchanger. The finned-tube-in-tank heat exchanger showed higher heat transfer effectiveness than the tube-in-tank heat exchanger. The heat exchange effectiveness of the storage tank was determined as a function of the average NTU.
PCM;Finned-tube heat exchanger;Effectiveness;
Agyenim, F., Eames P., and Smyth, M., 2009, A comparison of heat transfer enhancement in a medium temperature thermal energy storage heat exchanger using fins, Solar Energy, Vol. 83, pp. 1509-1520.
Tay, N. H. S., Belusko, M., and Bruno, F., 2012, Experimental investigation of tubes in a phase change thermal energy storage system, Applied Energy, Vol. 90, pp. 288-297.
Robak, C. W., Bergman, T. L., and Faghri, A., 2011, Enhancement of latent heat energy storage using embedded heat pipes, International Journal of Heat and Mass Transfer, Vol. 54, pp. 3476-3484.
Velraja, R., Seeniraja, R. V., Hafnerb, B., Faberb, C., and Schwarzerb, K., 1999, Heat transfer enhancement in a latent heat storage system, Solar Energy, Vol. 65, pp. 171-180.
Mettawee, E. S. and Assassa G. M. R., 2007, Thermal conductivity enhancement in a latent heat storage system, Solar Energy, Vol. 81, pp. 839-845.
Incropera, F. P., Dewitt, A. P., Bergman, T. L., and Lavine, A. S., 2007, Fundamentals of Heat and Mass Transfer, 6th ed., John Wiley and Sons, New York, pp. 790-800.