Numerical procedure for predicting annual energy consumption of the underfloor air distribution system

A numerical procedure, based on the coupling of two types of modeling (CFD simulation and dynamic cooling load simulation) is proposed in this article to predict annual energy consumption of the underfloor air distribution system. First the dimensionless temperature coefficient is defined in the UFAD system and obtained from CFD simulation. Then the temperature stratification input to the cooling load program ACCURACY is revised to calculate the updated supply and exhaust air temperatures for the final annual energy prrediction. Using Hong Kong weather datz, a small office room is investigated to demonstrate the method.