Windows heat gain through

Solar heat gain through windows can add to or detract from energy efficiency, depending on a building s type and use, the local climate, the season, and even the time of day. For some applications, SHGCs should be maximized for others, SHGCs should be minimized. 

Pennington and co-workers developed equations for prediction of the total heat gain through a double glazed window with drapes as a function of the transmissivity, reflectivity, and absorptivity of individual barriers, amounts of direct and diffuse solar... 

Solar heat gain through the window Solar radialion incident on the window... 

Special Topic Solar Heat Gain through Windows... 

For residential buildings in climates where heating energy use dominates, it is important to maximize solar gains through windows. Solar heat transmission... 

After the proper inside and summer outside temperature conditions for comfort and temperature conditions for process air conditioning have been selected, the next step is to calculate the space cooling load, which is made up of sensible heat and latent heat loads. The sensible heat load consists of (1) transmission through walls, roofs, floors, ceilings, and window glass, (2) solar and sky radiation, (3) heat gains from infiltration of outside air, (4) heat gains from people. 

C What is the effect of a reflective coaling on the outer surface of a window glass on the (a) heat loss in winter and (b) heat gain in summer through the window ... 

E -Determine the rate of net heat gain (or loss) through a 3-m-high, 5-m-wide, fixed 3-mn single-glass window with... 

Heat Absorbing Window Glass - A type of window glass that contains special tints that cause the window to absorb as much as 45% of incoming solar energy, to reduce heat gain in an interior space. Part of the absorbed heat will continue to be passed through the window by conduction and reradiation. 

Infiltration is the loss or gain of heat through areas where inside and outside air, through leaks, meet. Many homes lose up to 30-40% of the energy used for heating and cooling through leaks, there are most common at outside doors that do not fit well or poorly set windows. 

---