ABSTRACT

An analysis of the feasibility of a solar heat system for use at fairly high latitudes involves the same ingredients as for lower latitudes, except that cooling during the summer period is usually unnecessary. A general program has been written, which calculates incident direct, diffuse and reflected sunlight on arbitrarily oriented flat-plate solar collectors and through windows in the building considered, based on the Danish reference year data. Since it is expected that the dependence on the design parameters is different at different geographical locations, a detailed performance simulation should be made for each region where solar heat systems are planned to be installed. The components of the heat balance of the building are calculated hourly, and, as a boundary condition, the storage temperature is required to be periodical with a one-year period. A number of different settings of the controls for the heat pump operation have been studied.