Optimizing Urban Building Energy Consumption
The Central Business District (CBD) of Ahmedabad in India, planned to be developed by 2040, will have an increased floor space, five times of what it is in 2020. This will double the cooling energy demand if contemporary practices are followed. Moreover, the Energy Conservation Building Code, 2017 (ECBC) of India, despite its launch in 2007, has not been ratified in many states. With the ECBC prescriptive guidelines tailored according to the local and regional priorities, a suitable trade-off between energy efficiency and the lifecycle cost of the Energy Conservation Measures (ECMs) can be established. Thus, performing Urban Building Energy Modelling (UBEM) can help urban planners and local governments to implement the code and improve the performance of both the existing and the upcoming building stock.
This work aims to develop building envelop retrofit strategies which minimizes the lifecycle cost and the total annual cooling energy consumption in the coming decades, till 2040 with a rise in floorspace for the CBD of Ahmedabad. For this, the UBEM of 0.7 sqkm of the CBD, is developed for 2020, 30 & 40 using the existing dataset available with Ahmedabad’s local authority. The cost vs energy optimization has been performed using the modeFRONTIER software coupled with the EnergyPlus simulation engine for 2020, and the savings are projected till 2040 with a potential of 20% reduction in the total cooling energy.