An accurate calculation of sol-air temperature (T-sol) is very important for urban environments and building energy consumption. There are various methods that can be used to calculate T-sol by considering sky radiation effects. Climate conditions are vital factors affecting sky temperature (T-sky). In this paper, in order to select an appropriate calculation method to determine long-wave radiation, a theoretical analysis was carried out based on the effect of T-sky on the thermal gain of building envelopes due to long-wave radiation. Typical annual meteorological data were selected to calculate T-sol for 10 meteorological stations covering five building thermal zones in China. The application of the T-sol model was studied using MBE as the measurement standard, and a linear regression equation for the calorific value of the envelope obtained via the T-sky estimation method and the T-sky dynamic calculation method was established. The results show that relative humidity is the key meteorological factor that affects the application of the T-sol model and that the T-sky dynamic calculation should be used to calculate long-wave radiation in regions with low relative humidity. A thermal correction equation for buildings was obtained for use in areas lacking meteorological data and to provide a basis for sustainable building design.
Chen, J; Fan, Y; Wang, MH
Simplified Calculation of Tsol Based on Dynamic Numerical Simulation of Tsky in Diverse Climates in China
Sustainability