Faculty Publications
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Item Thermal and cost analysis of various air filled double glazed reflective windows for energy efficient buildings(Elsevier Ltd, 2020) Gorantla, G.; Saboor, S.; Vali, S.S.; Mahapatra, D.; Talanki Puttaranga Setty, A.B.; Kim, K.-H.The enormous amount of energy is being consumed by buildings in an attempt to deliver thermal comfort in buildings. This paper aims at reducing/increasing the total solar heat gain through various combinations of double glazed reflective windows of buildings. The spectral characteristics of six reflective glasses namely bronze, green, grey, opal blue, sapphire blue and gold-reflective glasses at a normal angle of incidence by using UV-3600 Shimadzu spectrophotometer according to ASTM E 424 standards were experimentally measured. The solar optical properties of the glasses were deduced by developing a MATLAB code using spectral data which was obtained from experiments in the solar spectrum wavelength range of 300 nm–2500 nm. Thirty air-filled double-glazed reflective windows have been studied for both thermal and cost analysis in the Indian composite climatic zone (New Delhi 28.580 N, 77.200 E). The configuration C13 (Grey reflective glass-Air gap 10 mm-Gold reflective glass) is observed to be the best air-filled double glazed window from the highest annual cost savings ($ 79.29 per annum in SE direction) and lower payback period (1.42 years) point of views among thirty double-glazed reflective glasses studied. The results of this paper are useful in the design of sustainable passive solar buildings. © 2019 Elsevier LtdItem Mechanical and dynamic thermal performance evaluation of rice husk blended cement plaster when used with different bricks(Elsevier Ltd, 2024) Mahapatra, D.; Madav, V.; Talanki Puttaranga Setty, A.B.The construction industry is known for its significant environmental impact during the construction and operational phases. This study aims to explore the potential of rice husk, an abundant agricultural waste, as a partial replacement for sand in cement mortar. The research evaluates the thermo-mechanical properties, including compressive strength, water absorption, thermal conductivity, specific heat, and thermal diffusivity, of cement mortar by conducting a series of laboratory experiments. One of the critical novel aspects of this study is the evaluation of the dynamic thermal performance of the cement mortar when used with different bricks. The dynamic thermal performance was assessed using a MATLAB code based on the Charted Institute of Building Service Engineers (CIBSE) 2006 standard. By increasing the percentage of rice husk as a replacement for sand, the compressive strength of the cement mortar decreases, while the thermal conductivity decreases and the water absorption capacity increases. Notably, the results reveal that a 12 % reduction in thermal conductivity can be achieved by replacing just 7 % of the sand with rice husk. Furthermore, the study establishes a linear relationship between the dynamic thermal performance of the cement mortar and its volumetric heat capacity. These findings contribute to the development of eco-friendly solutions for energy-efficient buildings. The outcomes of this research can help engineers, architects, and policymakers in the decision-making processes regarding sustainable construction practices, promoting the use of rice husk as a viable alternative to sand. © 2023 Elsevier Ltd