Comparative Study of Energy Efficiency Strategies for Corporate Buildings

Abstract

The Building sector in India is the second largest consumer of energy with 30% of total energy consumption. This percentage is likely to increase in coming years with the increase population and improvement in living standard of people. HVAC system in modern buildings is having highest amount of electricity consumption, around 60% electrical load of building. In the present work, cooling load have been calculated for a commercial 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. It is found that using building envelope as per ECBC (Energy Conservation Building Codes), HVAC load can be reduce around 21.25% and with using EEM (Energy Efficient Measures), to around 26.17%. HVAC load is calculated as per usage of system throughout year in corporate building. Implementations of non-conventional and energy efficient air conditioning system, results into considerable saving in energy consumption. According to economical analysis operating cost can be reduce by about 20% and 50% respectively using ECBC and EEM compare to conventional HVAC system and their payback period are 4.5 and 4 years respectively.