Thermal performance of walling material and wall technology
Journal Title
Journal ISSN
Volume Title
Author
Guide
Date of Issue
Jun.2020
Type
Project Report
Guide
Subject Keywords
Barcode
Class number
Abstract
Indian residences are vulnerable to heat-driven discomfort amid the mounting prevalence of weather extremes, residential design and construction practices, and densifying urbanscapes. Therefore, it is vital to understand the thermal comfort characteristics of nationwide residences. This study proposes an adaptive thermal comfort model based on yearlong field surveys across eight cities located in five climate zones of India, the India Model for Adaptive Comfort, Residential (IMAC-R). The model prescribes the operative temperature bands for 80% and 90% thermal acceptability in correlation with the outdoor reference temperature, applicable to mixed-mode (MM) and naturally ventilated (NV) residences. More than 80% of the Indian residential occupants had a neutral thermal sensation in the indoor operative range of 16.3 - 35 °
C in response to a 5.5 - 33 °C variation in the 30-day outdoor running mean temperature. Comparing the proposed model with the PMV model revealed that the latter under predicts the thermal adaptivity of Indian occupants. The model was also compared against its predecessor - India Model for Adaptive Comfort for Commercial Buildings (IMAC MM and NV), along with relevant global and regional thermal comfort models. On average, the neutral temperature prescribed by IMAC-R was warmer than the temperatures prescribed by IMAC MM and NV by 2.9 °C and 2.1 °C, respectively; it was also warmer than the temperature prescribed by the recent ASHRAE-55 and EN 16798-1 models by 2 °C and 0.3 °C, respectively. IMAC-R reserves the prospect of addressing the thermal comfort needs of the national population while paving the way for long-term energy savings and climate action.
Identifier URL
Pages
Faculty
Faculty of Technology
Citation
Source URL
Keywords
DOI
ISBN
Place of Publication
Publication Year
Edition
Provider
ISSN Number
OTHER
Volume Number
Issue Number
Journal Name
Publication
Shakti Sustainable Energy Foundation