Studies of Parameters on Heat Transfer through Glazing System using Guarded Hot Plate Apparatus

Sunny Kumar, Anuranjan Sharda


Heat transfer through different modes from outside environment to inside occur by conduction, convection and thermal radiation. Inclusion of automatic-advance-generation-software; ‘WINDOW 6.3’ makes possible the detailed true picture of the impact of glazed material and its thickness/ pane spacing on its Thermal Transmittance.. This technique makes the user easy to understand thermal performance of glazing system without extensive knowledge of numerical methods of heat transfer. The U-value and solar heat gain coefficient are the key parameters to analyze heat transfer through window 6.3. Therefore, an attempt has been made to carry out the study to calculate U-value, solar heat gain coefficient of different glazing systems with varying thickness/pane spacing in prevailing seasons. Composite climate of Una persisting in different season was well defined. The U-value obtained from simulation were validated using the guarded hot plate apparatus After analysis the experimental results, it was concluded that the U-value and Solar Heat gain coefficient was noted maximum in single glazed window consists of 3mm thickness during the hot dry weather. The authors finally recommended Double-glazed windows with 19mm pane spacing to be preferably used in Una region


Glazing, U-value, Window 6.3

Full Text:



Singh I, Bansal NK. Thermal and optical parameters for different window system in India. International Journal of Ambient Energy 2002;

(4): 201-11.

Wright JL, Sullivan HF. A 2-D numerical model for glazing system thermal analysis. ASHRAE Transactions 1995; 101(1): 819-31.

Curcja D, Goss WP. Two dimensional finite element model of heat transfer in complete fenestration systems. ASHRAE Transactions 1994; 100(1): 1207-21.

Reilly S. Spacer effects on the edge of glass and frame heat transfer. ASHRAE Transactions 1994; 100(1): 1718-23.


  • There are currently no refbacks.