Calculate TSER (total solar energy rejected) for window tint or glass from its SHGC, convert TSER to SHGC, or estimate the solar load a window rejects.
TSER Formula
The following equation is used to calculate the TSER.
- Where TSER is the total solar energy rejected
- SHGC is the fraction of incident solar energy entering through the complete glazing system, including direct transmission and the inward-flowing share of absorbed solar energy
To calculate TSER, subtract the SHGC from 1, then multiply by 100.
TSER (%) + 100 × SHGC = 100% for the same system and conditions. SHGC is a decimal, so it cannot be added directly to a percentage. TSER is not visible-light transmission, UV rejection or a prediction of annual cooling savings. The load mode estimates steady solar power. The optical mode accepts component totals from 99.9% to 100.1% as rounded data and normalizes them to 100%; it is a simplified estimate rather than a certified rating.
What is TSER?
Definition:
TSER, short for total solar energy rejected, is a measure of the amount of solar energy that is rejected by a semi-translucent material, such as glass.
How to Calculate TSER?
Example Problem:
The following example outlines the steps and information needed to calculate TSER.
First, determine the whole-system SHGC, including directly transmitted and inward-flowing absorbed solar heat, under the stated conditions.
In this example, this is found to be .45.
The final step is to use the formula above to determine the total solar energy rejected.
TSER = (1-SHGC) *100
TSER = (1-.45) *100
TSER = 55%
