Energy Efficient Strategies Comparison: A Corporate Building Case Study

Abstract

The Building sector in India is the second largest consumer of energy, about 30% of total energy consumption. This percentage is likely to increase in coming years with the increase in population and improvement in living standard of people. HVAC system in modern buildings is responsible for high electricity consumption, around 60% electrical load of building. In the present work, cooling load have been calculated for a corporate building. Energy efficiency strategies like building envelope, thermal energy storage system, radiant cooling and various other strategies like efficient chiller selection, variable frequency drive for pumps and fan of HVAC system have been incorporated. Comparative study of different energy efficiency strategies have been carried out with respect to cooling load and power consumption. Heat load calculation is done zone wise as per activities done in different rooms of a corporate building. It is found that using building envelope as per ECBC (Energy Conservation Building Codes), HVAC load can be reduce around 21.5% and with using EEM (Energy Efficient Measures), to around 31.4% compared to conventional building. According to present analysis electricity consumption cost of building under case study can be reduce by about 20% and 55% respectively using ECBC and EEM compare to conventional HVAC system and their payback period are 4.5 and 4.0 years respectively.