Abstract
The purpose of this paper is to propose how to estimate the heat load through a floor and a basement wall. First, the temperature distribution in the earth, floor and walls is computed making use of the computer program for the two-dimentional finite difference method of explicit form derived from a heat conduction differential equation. Then, the heat loss through a floor and a basement wall is calculated using the surface temperature distribution on them. Heat loss at steady state can be obtained when the deviation between inside and outside temperature is given as a constant value for a boundary condition, and storage heat load in the case of intermittent heating can be calculated when the periodically changing room temperature is given for it. These computed results are arranged into formulae and data for a heating load estimation.
