Optimisation of A Phase Change Thermal Storage System

Authors: Nasrul Amri Mohd Amin, Martin Belusko, Frank Bruno

Abstract:

PCMs have always been viewed as a suitable candidate for off peak thermal storage, particularly for refrigeration systems, due to the high latent energy densities of these materials. However, due to the need to have them encapsulated within a container this density is reduced. Furthermore, PCMs have a low thermal conductivity which reduces the useful amount of energy which can be stored. To consider these factors, the true energy storage density of a PCM system was proposed and optimised for PCMs encapsulated in slabs. Using a validated numerical model of the system, a parametric study was undertaken to investigate the impact of the slab thickness, gap between slabs and the mass flow rate. The study showed that, when optimised, a PCM system can deliver a true energy storage density between 53% and 83% of the latent energy density of the PCM.

Keywords: Phase change material, refrigeration, sustainability, thermal energy storage.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1060389

References:

[1] F. Wang, G. Maidment, J. Missenden, and R. Tozer, "A review of research concerning the use of PCMS in air conditioning and refrigeration engineering", in Proc. of the Int. Conf. on Advances Building Technology, Hong Kong, China, 4-6 Dec. 2002, pp. 1273- 1280.
[2] A. Pasupathy, L. Athanasius, R. Velraj, and R. V. Seeniraj, "Experimental investigation and numerical simulation analysis on the thermal performance of a building roof incorporating phase change material (PCM) for thermal management", Applied Thermal Engineering, vol. 28, no. 5-6, pp. 556-565, Apr. 2008.
[3] M. M. Farid, A. M. Khudhair, S. A. K. Razack, and S. Al-Hallaj, "A review on phase change energy storage: materials and applications", Energy Conversion and Management, vol. 45, no. 9-10, pp. 1597-1615, June 2004.
[4] S. M. Vakilaltojjar, "Phase change thermal storage system for space heating and cooling", Ph.D. thesis, School of AME, University of South Australia, 2000.
[5] A. M. Papadopoulos, S. Oxizidis, and N. Kyriakis, "Perspectives of solar cooling in view of the developments in the air-conditioning sector", Renewable and Sustainable Energy Reviews, vol. 7, no. 5, pp. 419-438, Oct. 2003.
[6] L. Jian-you, "Numerical and experimental investigation for heat transfer in triplex concentric tube with phase change material for thermal energy storage", Solar Energy, vol. 82, no. 11, pp. 977-985, Nov. 2008.
[7] W. Muriel, O. Hugh, S. Ted, M. Iain, O. Monica, and P. Scott, "Photovoltaics and peak electricity loads, Summer 2003-04", in Report for BCSE, May 2005.
[8] V. Butala and U. Stritih, "Experimental investigation of PCM cold storage", Energy and Buildings, vol. 41, no. 3, pp. 354-359, Mar. 2009.
[9] M. Liu, F. Bruno and W. Saman, "Thermal performance of a PCM thermal storage unit", in Proc. of Int. Solar Energy Society for Solar World Congress, Beijing, China, 18-21Sept. 2007.
[10] N. A. M. Amin, F. Bruno, and M. Belusko, "647-037- Maximizing the energy storage performance of phase change thermal storage systems", in Proc. of the IASTED Int. Conf., Solar Energy (SOE 2009)", Phuket, Thailand, 16-18 Mar. 2009, pp. 55-60.
[11] H. Mehling and L.F. Cabeza, Heat and Cold Storage with PCM: An up to date introduction into basics and applications. Berlin Heidelberg: Springers-Verlag, 2008.
[12] F. Bruno, "Centralised PCM systems for shifting cooling loads during peak demands in buildings", in Supplementary Technical Research Paper, City of Melbourne, May 2006.
[13] H. Ettouney, H. El-Dessouky, and A. Al-Ali, "Heat transfer during phase change of paraffin wax stored in spherical shells", Journal of Solar Energy Engineering, vol. 127, no. 3, pp. 357-366, Aug. 2005.
[14] J. P. Bedecarrats, F. Strub, B. Falcon and J. P. Dumas, "Phase-change thermal energy storage using spherical capsules: performance of a test plant", International Journal of Refrigeration, vol. 19, no. 3, pp. 187- 196, 1996.
[15] M. Belusko and F. Bruno, "140 - Design methodology of PCM thermal storage systems with parallel plates", in Report for 1st Int. Congress on Heating, Cooling, and Buildings, EUROSUN 2008, Lisbon, Portugal, 7- 10 Oct. 2008.
[16] The Board of Regents of the University of Wisconsin System. (2006, November, 16).
[Online]. Available: http://sel.me.wisc.edu/trnsys
[17] S. V. Dosky, D. Heinze, and J. Wolf, "Numerical simulation of a refrigeration cycle for scaling towards small geometries", International Journal of Refrigeration, vol. 31, no. 8, pp. 1384-1390, Dec. 2008.
[18] E. Halawa, F. Bruno, and W. Saman, "Numerical analysis of a PCM thermal storage system with varying wall temperature", Energy Conversion and Management, vol. 46, no. 15-16, pp. 2592-2604, Sept. 2005.
[19] E. Halawa, "Thermal performance analysis of a roof integrated solar heating system incorporating phase change thermal storage", Ph.D. thesis, School of AME, University of South Australia, 2005.
[20] D. J. Morrison and S. I. Abdel-Khalik, "Effects of phase-change energy storage on the performance of air-based and liquid-based solar heating systems", Solar Energy, vol. 20, no. 1, pp. 57-67, 1978.