TY JOUR TI THE USE OF SOLAR ENERGY TO REDUCE THE BUILDING HEAT LOSS KW solar energy KW Trombe wall KW energy conservation technologies KW air gap KW passive house KW thermal resistance of enclosing structures JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Alyautdinova, Y.A. PY 2018 IS 3 PB Belgorod State Technological University named after V.G. Shukhov