“…The curve LB is the efficiency of the reversible heat engine in which solar radiation performs work in combination with a substance (Wuerfel, 2005). The curve KB is the efficiency of the Carnot solar engine_reactor (Laptev, 2006), multiplied by the efficiency η U of the heat exchange between black bodies. The isotherm t-t' corresponds to the temperature 300 K. The calculated photosynthesis efficiency is presented by the point F in the isotherm.…”