V.А. Vasilyev, B.V. Tarnizhevskiy, ОJSC “ENIN”
Solar energy is transformed into heat by simple enough technical means, and therefore, it is widespread in the world. Key equipment, applied in installations and systems of solar heat supply and hot water supply, is a flat solar collector. Its basic constructive element is an absorbing blackened, as a rule, metallic plate with canals for heat-carrier (water, air).