A method has been developed to combine the DOE-2.1C program with a two-dimensional finite difference foundation model to simulate the energy performance of foundations in a prototypical house under realistic operating conditions. Changes in the underground heat flux due to varying zone temperatures are accounted for by a steady-state flux correction and a dynamic flux correction requiring iterations between the finite difference and DOE-2 programs. A data base of foundation energy performance was created using this procedure for 88 foundation configurations in 13 cities.

Units: I-P