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Abstract <p>Use of glass facades is increasing day by day in modern buildings in order to improve the daylight availability and aesthetic views of the building. Lighting load of the building is directly influenced due to daylight through the glass window of the building. Controlling artificial lighting system according to available daylight into the building space reduce energy consumption of the building. However penetration of daylight into the building space increases heat gain which results higher cooling load in most of the places in hot and worm climatic zones in India. External shadings devices are useful means to control heat gain inside the building space and reduces cooling as well as lighting load of the building. The present study focuses on the effect of daylight integration into the building modelled according to National Building Code 2016 (NBC) and Energy Conservation in Building Code 2017 (ECBC 2017) in India through window combinations. Three different daylight conditions and five different windows to wall ratio (WWR) have been studied in Kolkata, India and the result is validated with two other locations situated in higher and lower latitude compared to study location to verify the applicability of the result to other places. The result is compared to a reference building to quantify the benefits of daylight integration with artificial lighting system in terms of long term energy savings and economic benefit.</p>

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Energy Savings in Building due to Integration of Daylight through Different Window Combinations in Indian Climatic Condition

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Biswajit Biswas,
  • Subhasis Neogi,
  • Biswanath Roy

摘要

Abstract

Use of glass facades is increasing day by day in modern buildings in order to improve the daylight availability and aesthetic views of the building. Lighting load of the building is directly influenced due to daylight through the glass window of the building. Controlling artificial lighting system according to available daylight into the building space reduce energy consumption of the building. However penetration of daylight into the building space increases heat gain which results higher cooling load in most of the places in hot and worm climatic zones in India. External shadings devices are useful means to control heat gain inside the building space and reduces cooling as well as lighting load of the building. The present study focuses on the effect of daylight integration into the building modelled according to National Building Code 2016 (NBC) and Energy Conservation in Building Code 2017 (ECBC 2017) in India through window combinations. Three different daylight conditions and five different windows to wall ratio (WWR) have been studied in Kolkata, India and the result is validated with two other locations situated in higher and lower latitude compared to study location to verify the applicability of the result to other places. The result is compared to a reference building to quantify the benefits of daylight integration with artificial lighting system in terms of long term energy savings and economic benefit.