long-wavelength radiation

According to an advancement of exergy research in relations to thermal comfort and built environment for the last fifteen years, the availability of “warm” or “cool” radiant exergy emitted by the interior surfaces of building envelope systems is crucially important in providing building occupants with adaptive opportunity for thermal comfort both in summer and in winter. This paper demonstrates some numerical examples showing how the thermal performance of window systems affects the availability of “warm” and “cool” radiant exergies.