Abstract
This article is devoted to the problems of passive solar heating systems application in the modern heat supply systems. During the last decades a Trombe wall is the most popular system among other passive heat supply systems. Solar radiation intensity is the main factor, which has the huge impact on the thermal effectiveness of a Trombe wall. Making a decision regarding Trombe wall application in a heat supply system depends on the correct forecasting of solar radiation intensity on the surface during the heating period. This article contains the brief calculation for forecasting of solar radiation intensity on a Trombe wall surface. The main innovations in the calculation under consideration are taking into account of clouds impact, as well as determination of solar radiation intensity on a horizontal surface, if there are no values for the set city in NASA data bases. The calculation results has showed, that in case of Harbin climatic conditions a Trombe wall can allow to provide 32% of required amount of heat energy in the coldest month. Annual savings of heat energy are approximately 61%. Thus, a Trombe wall, as an additional heat source, is a reasonable option for the heat supply system in the set climatic conditions.
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