In this study, a form-stable composite Paraffin/Nanoclay (PA-NC) has been prepared by absorbing PA into porous particles of NC to be used for low-temperature latent heat thermal energy storage. The leakage test shows that the maximum mass fraction of PA that can be incorporated in NC without leakage is 60 wt.%. Differential scanning calorimetry (DSC) has been used to measure the thermal properties of the PA and PA-NC both before and after incorporation in plasterboard (PL). The mechanical performance of the samples has been evaluated in flexural mode. The thermal energy storage performance has been studied using a small test chamber (100 mm × 100 mm × 100 mm) made from 10 mm thick PL and measuring the temperatures using thermocouples. The flammability of the PL+PL-NC has been discussed using a cone calorimeter. The results indicate that the form composite PA has good potential for use as thermal energy storage materials in building applications., {"references":["Sharma, A., Tyagi, V. V., Chen, C. R. and Buddhi, D. \"Review on thermal energy storage with phase change materials and applications\", Renewable and Sustainable Energy Reviews, 2009, vol. 13, no. 2, pp. 318-345.","Zhiqiang (John) Zhai, Miles L. L. Abarr, Saleh N. J. A. L.-Saadi and Porter Yate. \"Energy Storage For Residential Buildings: Review And Advances\", APEC Conference on Low-carbon Towns and Physical Energy Storage,2013, Changsha, China.","Sari, A., Karaipekli, A. and Kaygusuz, K. \"Capric acid and stearic acid mixture impregnated with gypsum wallboard for low-temperature latent heat thermal energy storage\", International Journal of Energy Research, 2008, vol. 32, no. 2, pp. 154-160.","Oliver, A. \"Thermal characterization of gypsum boards with PCM included: Thermal energy storage in buildings through latent heat\", Energy & Buildings, 2011, vol. 48, pp. 1-7.","Farid, M. M., Khudhair, A. M., Razack, S. A. K. and Al-Hallaj, S. A. \"review on phase change energy storage: materials and applications\", Elsevier Ltd. 2004.","Fang, X., Zhang, Z. and Chen, Z. \"Study on preparation of montmorillonite-based composite phase change materials and their applications in thermal storage building materials\", Energy Conversion and Management, 2008, vol. 49, no. 4, pp. 718-723.","Shilei, L., Neng, Z. and Guohui, F. \"Eutectic mixtures of capric acid and lauric acid applied in building wallboards for heat energy storage\", Energy & Buildings,2006, vol. 38, no. 6, pp. 708-711.","Zhang, Y., Zhang, Q., Zhou, G., Lin, K. and Di, H. \"Application of latent heat thermal energy storage in buildings: State-of-the-art and outlook\", Building and Environment, 2007, vol. 42, no. 6, pp. 2197-2209.","Kandola, B. K., Alkhazaleh, A. H. and Graham J. Milnes. \"The Fire Behaviour of Gypsum Boards Incorporating Phase Change Materials for Energy Storage In Building Applications\", Fire and Materials Conference, San Francisco, USA, 2017.\n[10]\tHall, D., Donaldson, K., McAllister, J., Ross, J. A. S., Baker, D., Purser, D. A., Maynard, R. L., Wakefield, J. C., Anderson, D. and Marrs, T. \"Toxicology, Survival and Health Hazards of Combustion Products\", 1st edn, Royal Society of Chemistry, Cambridge, 2016.\n[11]\tAlkhazaleh, A. H., and Duwairi, H. M. \"Analysis of Mechanical System Ventilation Performance in an Atrium by Consolidated Model of Fire and Smoke Transport Simulation\", International Journal of Heat and Technology, vol. 33 (2015), no. 3, pp. 121-126.\n[12]\tAlkhazaleh, A. H., and Duwairi, H. M. \"Modelling and Design of Smoke Control System for Regular Large Atrium Installed in Mercantile Buildings in Jordan\", master thesis, university of Jordan, 2014.\n[13]\tGuan-Yuan Wu. and Ruu-Chang Chen. \"The Analysis of the Natural Smoke Filling Times in an Atrium\", Journal of Combustion, 2010, vol. 2010, pp. 1-9.\n[14]\tHarrison R. and Spearpoint, M J. \"Smoke Management Issues in Buildings with Large Enclosures\". Fire Australia, 2006, Melbourne, 1-3 November."]}