Abstract: The invention relates to a process of heat transformation to convert the low-temperature waste heat from cooling circuits of block-type thermal power station (BTPS) reciprocating-piston combustion engines into steam or other heating media of a temperature required for operation by adopting the principle of the high-temperature heat pump according to which the low-temperature heat produced by recooling the engine cooling circuits to their required inflow temperature required by construction is transferred to a liquid working medium, is absorbed by the working media vapors by partial evaporation, and is brought, by compressing and condensing the working medium vapors, to the temperature of the in-plant heating media and is transferred to them.