Technologies of heat provision in energy efficient houses using solar fences

Abstract

A topical issue at the time, when the cost of traditional energy sources is growing, is using alternative or non-traditional energy sources, such as solar, wind, geothermal, hydropower, bioenergy etc. The most powerful source of energy for humanity is the Sun. The annual amount of solar energy is almost 15 000 times higher than the needs of the population of our planet, but only a small part of it is used for economic needs. The climate of Ukraine gives a potential opportunity of wide use of solar energy. Intervention in the global processes of nature is not possible without changes in every day life in society. In particular, the improvement of the premises, in which people live is necessary, namely their building structures, foundations and materials for the manufacture of such structures. The article deals with the issue of solar fences, such as solar wall, solar window and solar roof. In the article is described the data of changes in the temperature of the heat carrier of the solar wall, the amount of specific instantaneous thermal power in time. It was investigated that at the solar energy intensity of 900 W/m2 the temperature at the outlet of the solar wall was 40 °C and gradually increased with the stabilization of the system. Whereas, solar fences with a solar roof on intensity of a heat flux Ів = 300 W/m2 there is little variation of efficiency from 0,73 to 0,47 at change of angles of falling from 30° to 90°. The paper analyzes the efficiency of solar fencing with a solar window in the southern orientation of it. It is established that the proposed models of solar fences are quite effective and can be used in solar heat supply systems