International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Effect of Window Location and Surface Absorptivity on Temperature inside an Enclosure-Experimental and Numerical Study

Author Affiliations

  • 1Department of Mechanical Engineering, Global Academy of Technology, Bangalore, INDIA
  • 2Department of Mechanical Engineering, JNN College of Engineering, Shimoga, INDIA

Int. Res. J. Environment Sci., Volume 1, Issue (5), Pages 40-47, December,22 (2012)

Abstract

This paper presents the effect of outlet window location and surface absorptivity inside an enclosure on temperature, external surfaces subjected to variable heat flux boundary condition. For analysis, scaled down size of a typical room has been considered, the enclosure has inner dimension 50cm x 40cm x 30cm (LxBxH), with the longer side oriented along east-west direction. The walls and roof of the enclosure are made of 10mm thick asbestos sheet. A door of 10 cm height from the floor is considered as inlet. Experiments were conducted for outlet window of 10 cm height located at 10cm, 15 cm, 20 c measured from the floor. The external surfaces roof, east wall and west wals were heated using electrical heating coil strips. For each window configuration, temperatures of the air inside the room were recorded using data acquisition system at fifteen locations for every five minutes. From the results, it was observed that for higher surface absorptivity, lower temperature index was observed when outlet window is at mid height of the west wall. It was also observed that as the surface absorptivity at the external surfaces decreases, window located at 10 cm from the floor provides lower temperature index. Numerical simulations conducted showed lesser deviation from the experimental values.

References

  1. Jayaraj S., Energy Efficient Buildings, NIT, Calicut, October 14-15 (2011)
  2. Sinha S.L., Arora R.C., Subhransu Roy, Numerical simulation of two-dimensional room air flow with and without buoyancy, Energy and Buildings, 32, 121 (2000)
  3. Dubovsky V., Zisking G., Druckman S., Moshka E., Weiss Y. and Letn R., Natural convection inside ventilated enclosure heated by downward-facing plate: experiment and numerical simulations, International Journal of Heat and Mass Transfer, 44, 3155-3168 (2001)
  4. Ziskind G., Dubovsky V. and Letan R., Ventilation by natural convection of a one-story building, Energy and Buildings, 34, 91-102 (2002)
  5. Joseph Khedari, Boonlert Boonsri Jongjit Hirunlabh, Ventilation impact of a solar chimney on indoor temperature fluctuation and air change in a school building, Energy and Buildings, 32, 89-93 (2000)
  6. Prianto E. and Depecker P., Characteristic of airflow as the effect of balcony, opening design and internal division on indoor velocity- A case study of traditional dwelling in urban living quarter in tropical humid region, Energy and Buildings,34 401-409 (2002)
  7. Raman P., Mande Sanjay and Kishore V.V.N., A passive solar system for thermal comfort conditioning of buildings in composite climates, Solar Energy, 70, 319-329 (2001)
  8. Yi Jiang, Donald Alexander, Huw Jenkins, Rob Arthur, Qingyan Chen, Natural ventilation in buildings: measurement in a wind tunnel and numerical simulation with large-eddy simulation, Journal of Wind Engineering and Industrial Aerodynamics, 91, 331-353 (2003)
  9. Vedavyasa M., Sreepathi L.K. and Rajagopal M.S., Effect of window location and ventilator on Temperature Distribution inside an Enclosure – Experimental Study, International Journal of Mechanics and Thermodynamics, 3(1), 19-26 (2012)
  10. Mani, Handbook of Solar Radiation Data for India, Allied Publishers, New Delhi 127 (1980)
  11. 11.Suhas P Sukhatme, Solar Energy, Tata McTGraw Hill Publishing Company Limited, New Delhi, 74 12.Tiwari G.N., Upadhyay M., Rai S.N., A Comparison of Passive Cooling Techniques, Building and Environment,29, 21-31 (1994)