ABSTRACT
The construction industry is one of the largest energy consuming sectors and air conditioning system consumes more than half of the energy consumed in this sector. The main objective of this paper is to explore the potential of reducing energy consumption of the central air conditioning system. This works uses well known building simulation software, TRNSYS to carry out the dynamic analysis of HVAC system. To accomplish the energy conservation objective the enthalpy wheel as energy efficient cooling technology is coupled with liquid cooled water chiller system.
In the present work, heat load estimation and simulations for HVAC systems are carried out for a three floor library building of IIT Delhi through TRNSYS package. Annual energy consumption of different components of air conditioning system is estimated for the existing water chiller as well as the existing chiller with enthalpy wheel. Detailed annual energy consumptions for both systems are compared to figure out the energy conservation potential. To find out the effect of both HVAC system on indoor conditions; the simulated results of indoor temperature, indoor relative humidity and thermal comfort index ‘PMV’ are compared.
The coupling of energy wheel with water chiller system has shown a significant potential in reducing energy consumption of building HVAC system. The results of PMV and indoor conditions show that enthalpy wheel is able to produce better thermally comfortable conditions through out the year.
