INTEGRATION OF PHASE CHANGE MATERIAL (PCMs) INTO COOLING CEILINGS SYSTEMS: AN OVERVIEW

Abstract

This thesis looks at the ways Phase Change Materials (PCMs) can be used in cooling ceiling systems, mainly for buildings that are being renovated. As PCMs are known for having a great amount of latent heat capacity, they help reduce changes in indoor temperature during the process of freezing and melting. New research shows that inserting PCMs into radiant cooling ceilings improves the temperature control well enough to eliminate the need for air conditioners. In renovations, PCMs can give a building better thermal mass and resulting in both better comfort and more energy savings. Literature studies have shown that adding PCMs to building envelopes, especially in ceilings, decreases peak temperatures in the home and keeps daily swings in indoor temperature stable. Some advanced methods like micro- and macro-encapsulation help stop liquid from leaking and maintain the battery’s heat, as well as its stability over time. Though PCMs have poor heat-transfer capability and can wear out more quickly when the system has to go through many heating and cooling cycles. The use of materials such as graphene and carbon nanotubes explains how innovations are dealing with these issues. To sum up, blending PCMs with ceiling cooling systems has great potential to boost interior comfort and cut down energy use, as long as more research is done on the materials, how they should be used, and their future performance.