This research seeks to synthesize a hybrid radiant cooling system which not only cools the space but also heats water. The system employs Phase Change Materials (PCMs) to improve performance and heat pumps to reduce energy and enhance sustainability. PCMs capture and release thermal energy so that temperatures are maintained indoors while heat pumps control the thermal transfer. Uniform temperature and thermal comfort is ensured with aluminum and copper pipes. PCMs incorporated in the roof can capture excessive heat in the daytime and release this at night in order to reduce the need for cooling. Heat pumps are able to control off peak cooling and peak demand efficiently and hence energy costs and load on the grid are brought down. Among the key ingredients to designing this integrated building are PCM selection, its structural integration and control algorithms. Life Cycle

Assessment shows a significant potential for energy saving, emissions reduction and improvement in thermal comfort. The present study outlines a novel approach which is highly relevant for sustainable building design.

KEYWORDS:

Phase Change Materials (PCMs) Latent heat storage

Off-peak cooling

Peak load demand reduction Life Cycle Assessment (LCA) Structural integrity Sustainable building design