Experimental verification and characteristics analysis of dynamic floor radiant cooling load

On account of radiant time factors method, this article presents a computed way of floor radiant cooling loads using radiant time factor procedure program to compute floor radiant time factors and to get floor radiant heat gains by test data collected within 24 h, then dynamic floor radiant cooling loads could be acquired by matrix operations. Five experimental conditions are selected to validate the calculated results. The experimental results indicate that the crest value errors between room-cooling loads and separating cooling loads about each condition are among the range −3.2% to 4.7%, and the mean value errors are less than 6.1%. The floor radiant cooling loads decrease and delay according to the changes of floor radiant heat gains. Crest value errors between measurement cooling loads and calculation cooling loads are among the range −1.8% to 2.3%, and the mean value errors are not more than 3.2%. Taking radiant time factor procedure program to compute corresponding building room floor radiant time factors with three types of building envelope, floor radiant cooling loads’ characteristics would be obtained under two conditions such as different radiant time factors and different radiant heat gains. So the room floor radiant time factors are calculated by radiant time factor procedure program, and building room floor radiant cooling loads can be computed.