Volume 2 - Issue 3, May - June 2026

This project investigates the use of phase change materials (PCM) as a thermal energy storage system to reduce HVAC load in buildings. PCM absorbs excess heat during temperature periods and release it during cooler period, thereby stabilizing indoor temperature. A 1.5ft × 1.5ft experimental model was developed with or without PCM to analyse thermal performance. The results demonstrate reduce temperature rise and improved energy performance. The result demonstrates reduced temperature rise and improved energy efficiency in PCM - integrated systems.In this study, a scaled experiment model of dimension 1.5ft 1.5 ft1.5 ft was developed, consisting of two separate chamber one integrated with PCM and the other without PCM for comparative analysis. paraffin wax was selected as the PCM due to its suitable melting temperature range (24-28 oC)chemical stability, and ease of availability. The PCM was incorporated into one wall of the test chamber in a uniformly distributed layer to enhance thermal energy absorption.A controlled heat source was applied to simulate real environment conditions, and temperature variations were recorded using sensors placed inside both chambers. The experiment result demonstrate that the PCM-integrated chamber exhibits a significantly slower temperature rise and lower peak temperature compared to the conventional chamber. This indicates a reduction in heat gain and, consequently, a decrease in HVAC cooling load. effective heat transfer into chamber. The results show a reduction in peak temperature by approximately 5-8 and a noticeable delay in temperature rise in the PCM-1.The study also highlights the importance of proper system design, including PCM thickness, encapsulation, and the use of high-conductivity materials such as aluminium to enhance heat transfer. Although challenges such as a low thermal conductivity and initial cost exist, the overall benefits in terms of energy savings and environmental impact are significant.In conclusion, the integration of PCM into building components presents a promising and sustainable solution for reducing HVAC load, improving energy efficiency, and enhancing indoor thermal comfort. The proposed system can be further optimized and scaled for real-worlds applications, contributing to the development of green buildings and energy-efficient infrastructure.

Krishna Kumar, Nishant Raj, Shahid Raza, Attaullah Khan, Naveen Thakur, Shivam Upadhyay,"Load Reduction of HVAC Components by Using PCM" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(3): Page(492-498) May-June 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.