Variation of Time Lag, Decrement Factor and Inside Surface Temperature with Solar Optical Properties of Building Envelope in Different Climatic Zones of India

  • Debasish MahapatraEmail author
  • T. P. Ashok Babu
Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 169)


Maintenance of thermal comfort inside buildings requires a significant amount of energy. According to the Centre for Science and Environment, the energy spent on achieving thermal comfort in commercial buildings and in residential buildings are 31% and 7%, respectively. Considering the energy crisis that world has been suffering; every individual should try to save energy by some means. The increase in urbanization over the last few years gave rise to boom in constructions. Choosing the materials used for the construction of buildings wisely can contribute towards energy saving. The solar optical properties of building envelope affect the surface temperature up to a great extent which in turn affects the energy used for thermal comfort. In this paper, the effect of solar optical properties on time lag decrement factor and inside surface temperature is studied in different Indian climatic zones.


Time lag Decrement factor Energy saving Urbanization 


  1. 1.
    Valsson, S., Bharat, A.: Urban heat island: cause for micro climate variation. Arch.—Time Space People, 20–25 (2009)Google Scholar
  2. 2.
    Urbanization in India. Last accessed 26 Mar 2019
  3. 3.
    Synnefa, A., Santamouris, M., Akbari, H.: Estimating the effect of using cool coatings on energy loads and thermal comfort in residential buildings in various climatic conditions. Energy Build. 39(11), 1167–1174 (2007)CrossRefGoogle Scholar
  4. 4.
    Hernandez-Perez, I., Xaman, J., Macias-Melo, E.V., Aguilar-Castro, K.M., Zavala-Guillen, I., Hernandez-Lopez, I., Sima, E.: Experimental thermal evaluation of building roofs with conventional and reflective coatings. Energy Build. 158, 569–579 (2018)CrossRefGoogle Scholar
  5. 5.
    Shen, H., Tan, H., Tzempelikos, A.: The effect of reflective coatings on building surface temperatures, indoor environment and energy consumption. Energy Build. 43(2–3), 573–580 (2011)CrossRefGoogle Scholar
  6. 6.
    Arora, C.P.: Refrigeration and air conditioning, 3rd edn. Tata McGraw-Hill, New Delhi (2009)Google Scholar
  7. 7.
    Asan, H.: Investigation of wall’s optimum insulation position from maximum time lag and minimum decrement factor point of view. Energy Build. 32, 197–203 (2000)CrossRefGoogle Scholar
  8. 8.
    ISHRAE: Indian weather data society of heating, refrigerating and air conditioning engineers. India (2017)Google Scholar
  9. 9.
    Sameera, S., Rao, P.P., Divya, S., Raj, A.K.V., Thara, T.R.A.: High IR reflecting BiVO4–CaMoO4 based yellow pigments for cool roof applications. Energy and Build. 154, 491–498 (2017)Google Scholar
  10. 10.
    Synnefa, A., Santamouris, M., Apostolakis, K.: On the development optical properties of cool coloured coatings for urban environment. Sol. Energy 81(4), 488–497 (2007)CrossRefGoogle Scholar
  11. 11.
    Thongkanluang, T., Chirakanphaisarn, N., Limsuwan, P.: Preparation of NIR reflective brown pigment. Procedia Eng. 32, 895–901 (2012)CrossRefGoogle Scholar
  12. 12.
    Online electricity bill calculator—for all states in India. Last accessed 6 May 2019

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringNational Institute of Technology SurathkalSurathkalIndia

Personalised recommendations