International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 04 | Apr 2025
p-ISSN: 2395-0072
www.irjet.net
A Study on Passive and Energy-Efficient Cooling Strategies in Vernacular and Modern Buildings in India’s Hot-Dry Climate Gunja Goyal1, Dr. Richa Ankush Pathe2 1 Research Scholar, Department of Architecture, R.K.D.F University, Bhopal, India 2 Professor, Department of Architecture, R.K.D.F University, Bhopal, India
-------------------------------------------------------------------------***----------------------------------------------------------------------Abstract In many parts of India—like Rajasthan, Gujarat, and parts of Madhya Pradesh—summer temperatures can soar above 45°C, making indoor comfort a serious challenge. While air conditioners are commonly used, they consume a lot of electricity and aren’t always affordable or sustainable. This paper looks at how both traditional and modern buildings in hot-dry climates are keeping spaces cool without relying on mechanical systems. From courtyards and jaali walls in old havelis, to modern solutions like earth air tunnels and ventilated façades in green buildings, the study explores how these techniques work, and how effective they really are. Using real examples and documented performance data, we try to understand what makes these cooling strategies work in harsh climates. The goal is to show how lessons from the past can be combined with modern technology to create buildings that are comfortable, cost-effective, and environmentally friendly. This paper brings together traditional wisdom and smart design, offering practical ideas for architects, builders, and policymakers working towards more climate-resilient construction in India.
Keywords Passive cooling, climate-responsive design, traditional architecture, earth air tunnel, green buildings, hot-dry climate, energyefficient housing, sustainable architecture
1. INTRODUCTION India’s hot and dry regions—such as western Rajasthan, parts of Gujarat, Madhya Pradesh, and interior Maharashtra—face extreme summer temperatures, often crossing 45°C. In these areas, ensuring thermal comfort indoors without depending on energy-intensive air conditioning has always been a major design challenge. While modern mechanical cooling systems are effective, they are expensive, electricity-dependent, and contribute to the urban heat island effect and carbon emissions. Interestingly, long before air conditioning became common, traditional Indian architecture already had solutions to beat the heat—like inward-facing courtyards, thick walls, shaded verandahs, and jaali (perforated) screens. These features not only made the indoor environment more comfortable but also responded intelligently to the local climate, materials, and lifestyle. Today, as climate change increases both temperatures and electricity demand, revisiting these age-old design strategies makes more sense than ever. At the same time, newer techniques—such as earth air tunnel systems, green roofs, ventilated façades, and reflective coatings—are being integrated into modern buildings to enhance energy efficiency and reduce cooling loads. This paper explores both ends of the spectrum: the wisdom of vernacular cooling systems and the innovations of modern passive techniques. Using real-life examples from architecture in India’s hot-dry zones, the study compares how each method performs in terms of comfort, cost, and sustainability.
2. VERNACULAR COOLING STRATEGIES IN HOT-DRY REGIONS India’s traditional architecture has always responded wisely to its local climate, especially in hot-dry regions where heat and dryness pose serious challenges. Long before mechanical cooling became available, people developed building techniques that made homes and public spaces livable—even during peak summer. These techniques weren’t just practical, they were deeply rooted in culture, craftsmanship, and the use of local materials.
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