Mahindra-TERI Centre of Excellence launches report on sky modelling

The report emphasises the role of accurate daylighting data in creating energy-efficient structures.

Mahindra-TERI Centre of Excellence (CoE), a joint research initiative of Mahindra Lifespaces and The Energy and Resources Institute (TERI), on November 29, 2022, released a technical report, guidebook and online toolkit, defining sky luminance across various sky conditions in landlocked cities.

This study will help architects, designers and other stakeholders in identifying the measured sky conditions on any day and time of the year. For this purpose, a sky scanner and solar monitoring unit was set up at the MTCoE lab in Gurgaon to collect the luminance distribution data from 2020.

The Mahindra-TERI CoE leverages state-of-the-art research techniques, tools, and performance measurement solutions to boost the development of green buildings in India.  The joint research initiative is working towards developing open-source and science-based solutions for India’s real estate sector.

Daylighting plays an important role in modern architecture in aiding visual comfort and energy efficiency evaluation. This requires an accurate estimation of the amount of daylight for any point within the indoor space. The Mahindra-TERI CoE identified the need for such data and initiated sky modelling research that best represents the luminance distribution as per the CIE standard (International Standards of sky Illumination). The data will be utilised for daylight assessment, energy savings, visual comfort assessment, and will also be crucial for increasing the accuracy of daylighting software which will in turn help architects and designers in selecting glass types and determining the ideal window-wall ratio.

An MoU was also signed between TERI and Saint Gobain Research India, expanding the sky modelling research as part of MTCoE by installing another sky scanner in Chennai to record the south coastal data. This will be the first installation in southern India and the second in the country.

 “Design interventions can be used to increase the efficiency and thermal performance of green buildings. If these design decisions are driven by extensive data, we can customise and optimise the outcomes of integrating these elements into buildings. The data collected from the Sky Scanner can be used by designers and developers everywhere, and accelerate their journey towards efficient, green buildings,” said Jitesh Donga, chief of design, Mahindra Lifespace Developers.

“Sky Modelling is one of the research activities being carried out at MTCoE with an aim to categorize the sky patterns subset from the CIE standard general sky that best represents the sky luminance distribution in Gurugram, India. We are certain that the outcomes of this study will help the architects and designers to select the right glass with optimum visual light transmission and consider the optimum window-wall ratio of the project for better visual comfort and energy savings in their upcoming projects,” says Sanjay Seth, senior director, TERI. 

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