PARAMETRIC ANALYSIS USING DYNAMIC ENERGY SIMULATION TOOLS TO EVALUATE THE PERFORMANCE OF BUILDING ENVELOPE IN THE RESIDENTIAL BUILDINGS OF COMPOSITE CLIMATIC REGION OF INDIA
Results of monitoring of electricity consumption in typical multi storey residential flats in the composite climate region of India, have shown that 30 60% of the annual electricity consumption is used for space conditioning, mainly cooling of bedrooms and living room. Most of the cooling load in the residential buildings originates from solar heat gains and heat transmission through the envelope (through windows, walls, and roof) Thus, special attention is needed to reduce solar heat gains and heat transmission through improved building envelope. Until recently, the passive heat gains were overlooked. This study aims as demonstrating the importance of passive features on reducint the gross thermal cooling energy demand. This paper discusses the results of the thermal performance (performed using TRNSYS 17 software) and daylighting analysis (performed using ReluxPro Professional software) of typical bedroom and living room cases. The paper discusses the impact of various building envelope features on the gross thermal cooling energy through parametric simulation analysis. The analysis includes parametric analysis of window to wall ratio, external wall to floor area ratio, wall insulation, external finish of the wall, window design, and shading systems, on the thermal performance and daylighting of the building, and provides recommendations from an energy efficiency perspective. The potential of gross thermal cooling energy reduction is of 23 56% depending of the package of measures. The tool used was the Parametric Generator developed under VBA in the Excel environment. This work was carried out under the Indo Swiss Building Energy Efficiency Project (BEEP) and resulted in the development of guidelines for the design of energy efficient residential buildings for composite climatic regions of India (BEE, 2014)