A SIMULATION METHOD FOR FLUCTUATING TEMPERATURES IN CRAWLSPACE FOUNDATIONS

Using the z-transfer function technique, hourly energy performance of below grade building envelope components is determined. In particular, the technique is integrated with a state-of-the-art hourly whole buil ding simulation program to predict the effect of indoor temperature se tback and foundation insulation configuration on the hourly variation of crawlspace temperature and ground-coupled heat loss of a residentia l building. It is found that the indoor temperature setback in the hou se affects significantly both the crawlspace temperature and the found ation heat loss. Typically, it was found that the setback and the setu p in house temperature increases the amplitude of the fluctuations of both the crawlspace temperature and the foundation heat loss. A simple correlation is provided to determine the effect of the temperature se tback on the foundation heat loss. (C) 1997 Elsevier Science S.A.