The aim of this paper is to promote renewable
thermodynamics of spontaneous physical phenomena’
into a new sphere of artificial constructions - solar heat
engines. As far as problem of efficiency is a key point of
following consideration let us begin, for the sake of
introduction, with the problem: why in spite of maximum
thermal efficiency (as it follows from reversible theory of
heat2 ) we can not find around us any Carnot engine
actually working. Theory of motive power of heaf based
on the principle of Carnot to have two reservoirs: source