Integrated evaluation for energy and comfort quantification of windows in a residential apartment of Mumbai
Vardan Soi*, Shailee Goswami
Saint Gobain Research India, Chennai, India
DOI: 10.62744/CATE.45273.1178-462-471
Email: vardan.soi@saint-gobain.com
Abstract:
This paper aims to understand the energy and comfort performance of glazings for residential apartment in Mumbai. Firstly, an integrated workflow was developed on Ladybug tools to conduct thermal, energy and daylight simulations using a single model. Secondly, the developed workflow was deployed to simulate multi- comfort (visual & thermal & energy performance) for a 2 Bedroom, Hall and Kitchen (BHK) apartment as the case study. Two glazing types, clear (U-value 5.6, SHGC 0.85, VLT 0.85) and high performing (U-value 2.5, SHGC 0.27, VLT 0.34) were analysed. The results demonstrated that high performance glazing reduces the energy consumption by 37%, improves the thermally comfortable area from 34% to 85% and also provides better visual comfort (DGP <30%). Lastly, the research was extended to analyse 8 different types of glazings with incremental variation of SHGC and VLT to generate an integrated metric. This metric compares the performance of all glass options in terms of cooling consumption, thermally comfortable area and glare probability in the space, enabling the stakeholders to select an optimal window configuration for their project. The results demonstrate that use of ideal option (G8) is is providing highest thermally area comfortable (80%) and lowest DGP (27%) with reduced energy consumption (47 kWh/m2).
Keywords: integrated metric, energy efficiency, thermal comfort, visual comfort, ladybug tools, residential apartment