Extract

In the beginning of Delhi Master Plan 2021, existing buildings of Delhi are energy intensive which add to the cooling load and energy requirement. The study aims to reduce energy use in existing buildings through the use of passive cooling strategies, after building performance evaluation is carried out; to highlight the importance of passive cooling strategies and their relevance with two case studies
of built-forms in Delhi which differ in their design, location and function. The performance of the
buildings in its existing condition is monitored in two extreme climatic conditions; summer and winter.
Exploration and experimentation of passive strategies are done on two built forms through modelling
using the environmental tool IESVE, to determine optimum design solution. The key findings of
modelling are the importance of response of each building element to its environment. Appropriate
insulation of the roof drastically changes the adjacent internal environment due to the amount of solar
radiation falling on it. Design of overhangs must be done in relation to the altitude angle of solar
radiation and depth of window. Selection of strategies based on micro climate and design of buildings in
harmony with the environment is also crucial for cutting down energy consumption.

Keywords: Building Performance Evaluation, Passive Strategies, Modelling, Simulation

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