Total Solar Energy Rejection Calculation

Two common heat rejection indexes used are irr infrared rejection and tser total solar energy rejection.

Total solar energy rejection calculation. The total amount of ultra violet that is rejected by the window film glass. Be aware that this nominal ratio is given for standard test conditions stc. Separating the ir rejection for purposes of reporting heat gain is misleading. Irr measures only the amount of ir infrared component that is rejected by the window film.

R is the yield of the solar panel given by the ratio. Total solar energy rejected. Sunlight solar radiation is made up of 2 ultraviolet 49 visible light and 49 infrared energy and all of this energy generates heat if it enters a room through a window. Almost all window film block 99 100 of uv rays.

Total solar energy rejected tser is a factor that describes the total amount of solar energy uv visible ir that is rejected from passing through glass. The total amount of solar energy heat rejected by the window film glass. Films can be designed to work on either one part of the solar spectrum or all three. The shgc or its counterpart the total solar energy rejected tser reflects the true performance of solar heat gain or rejection through a window int o a building and its calculation includes ir rejection.

The higher the number the less ultra violet rays are behind transmitted. This is calculated across all the sun s wavelengths and even includes the portion of heat that is absorbed by the glass and reradiated inwards. Total solar energy rejection. The solar panel yield of a pv module of 250 wp with an area of 1 6 m2 is 15 6.

So if a film has a 65 ir it means the film rejects 65 but lets in 35 ir. The higher the. Radiation 1000 w m2 cell temperature 25 celcius degree wind speed 1 m s am 1 5. Linshang technology also provides customized services for tser data for ls182 window tint meter the minimum order quantity is 50 units please contact sales21.

Clearly then when we read the specification called total solar energy rejection we can now see that it is not referring to temperature reduction percentage but rather it is the percentage of incident solar energy rejected. When the sun is directly overhead all vertical windows with or without film have 100 total solar energy rejection. The ir rejection rate is a number that lets customer understand that the film can reject majority of the heat from infrared it does not mean that if a large portion of the ir is blocked. However irr does not measure the total amount of heat that is.