Abstract
Results of indoor air temperature swings in zero-heating, passive solar houses with thermally massive walls using frequency domain techniques are presented in this paper. Theoretical analyses pertinent to the study were presented in Part 1 of the paper. The diurnal and annual indoor temperature swings predicted by the other computational methods (finite difference in SUNREL and time series in EnergyPlus) for a simple test house compare reasonably well with the results obtained by frequency domain techniques. Although there is an optimum mass (corresponding to minimum air temperature swing) for a given material for diurnal cycles, the annual swing is inversely proportional to the amount of thermal mass. The results further suggest that the degree of annual swing is also dependent on the level of insulation associated with the mass. The effect of the insulation on daily fluctuations is however insignificant.
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