For every window, the NFRC label rates the U-factor, Solar-Heat-Gain Coefficient (SHGC), and Visible Transmittance (VT). Air Leakage (AL) and Condensation Resistance (CR) are optional ratings. The ratings are explained briefly in Figure 3-7 and in more detail in the following sections. ...
Thus, the ratio of visible-light transmittance to the SHGC ratio concept is needed, and it is called LSG (light-to-Solar gain ratio). We desire LSG to be as high as possible and current highest LSG window product in the market is around 2.4. In the spectra level, the ideal low-E ...
In this section, simulations were undertaken for TT PS-TIM window systems of which the TT layer of the slats has fixed optical properties and the transition temperature was set to values between 19 °C and 25 °C. As discussed in the previous section, varying solar transmittance against reflec...
This is likely the cause for the reduced measured solar transmission values for the series with 500 W/m2. The measured value of the GlassX window is sensibly lower than that measured in previous experiments, and this can be explained considering the more complex layer structure of the specimen...
In order to discover the influence of the different window design elements on the optimal WWR, it is necessary to determine the different conditions of the basic model according to the change in window design elements and then calculate the values for energy consumption and CO2 emissions under eac...