FEATURES OF OPERATION OF VACUUM SOLAR COLLECTORS IN THE HEATING SYSTEM
Features of operation of the solar water-heating installations equipped with vacuum tubular collectors are considered. Results of tests of standard solar collectors are given in the specialized stand during various periods of year taking into account climatic conditions of the Far East region. Results of the analysis of power indicators of solar collectors are presented. The conditions providing increase of efficiency of the main knots of solar water-heating installations in systems of heat supply are defined. With experiments, it is confirmed that solar collectors with vacuum tubes are the most effective and reliable among other types of solar collectors. These collectors’ best of all meet moderate temperature requirements to the heat carrier (50-95 °C). Solar collectors with vacuum tubes have an internal copper core, which is in the sealed vacuum tube - "thermos", as a result thermal losses are rather low even in cold climatic conditions of the Far East of Russia.