%0 Journal Article %T Approximate calculation of a theoretical cycle of a vapor-compression freon loop in an air heat pump %A Fedosov, S.V. %A Fedoseev, V.N. %A Loginova, S.A. %A Zaitseva, I.A. %K vapor-compression cycle, freon loop, enthalpy, air heat pump %J Smart composite in construction %D 2021 %N 2 %P 10 %I Yaroslavl State Technical University