n number of turbines engine on endothermic chemical processes

If the capacity of the solution is too little to cool the working substance to a temperature below its boiling point, will have to reduce the amount of waste heat. Let that be a n of the number of working substances  unit as I drew on diagram 1.

For me it is not known what are the possibilities of endothermic solutions to cool, but at the expense of this issue of reducing waste heat I am debate  in physical methods for creating cold part. So in short:

Several working substances - a, b ... n each with a lower boiling point. Solvent α heated working substance a above its boiling point; due to the heat exchange between a and b a  liquefies and b boiling ... and so to working substance n .

Solvent α heat exchange with each of the evaporators on working substances. The latter working substance n should have a boiling point lower than the boiling point of the solvent  α and higher than the boiling point of the solution αβ . So working substance n liquefies solvent  α , and the solution αβ  closes the cycle of working substance n.

Probably every one variant of the physical method I've drawn may be converted to chemical - with a one working substance, with n of number of working substances and two working substances with a common cold part, so small capacity (possibly) of cooling on solution hope it is not a problem.


08.07.2016

For а less waste heat would be appropriate to have another heat exchange between the solvent α and the last working substance n as in chart 2