Abstract: Method for coupling a first heat-requiring industrial process to a second cold-requiring industrial process, whereby a first circuit for energy recovery (1) from the first industrial process transfers heat to a second circuit for cold production (2) for the second industrial process, wherein the first circuit for energy recovery (1) the energy carrier is a binary mixture of water and ammonia that has two-phases and is compressed by a compressor (7) specifically suitable for compressing a two-phase fluid such as a compressor with a Lysholm rotor or equipped with vanes, whereby all or part of the liquid phase evaporates as a result of compression such that overheating does not occur and such that less working energy must be supplied.

Abstract: Method for coupling a first heat-requiring industrial process to a second cold-requiring industrial process, whereby a first circuit for energy recovery (1) from the first industrial process transfers heat to a second circuit for cold production (2) for the second industrial process, wherein the first circuit for energy recovery (1) the energy carrier is a binary mixture of water and ammonia that has two-phases and is compressed by a compressor (7) specifically suitable for compressing a two-phase fluid such as a compressor with a Lysholm rotor or equipped with vanes, whereby all or part of the liquid phase evaporates as a result of compression such that overheating does not occur and such that less working energy must be supplied.

Abstract: A heat recovery and upgrading method includes cycles of the subsequent steps of providing a working fluid including a liquid phase in a working fluid stream; transferring heat to the working fluid stream to partially evaporate working fluid in liquid phase to obtain a two-phase working fluid stream in liquid phase and gas phase; compressing the two-phase working fluid stream so as to increase a temperature and pressure of the working fluid and to evaporate working fluid in liquid phase; and transferring heat from the working fluid stream by element of condensation of working fluid. In the first step he working fluid is preferably in a predominantly single-phase working fluid stream in liquid phase when heat is transferred to the working fluid. In the third step working fluid in liquid phase is preferably evaporated so that a two-phase working fluid stream is maintained, especially a wet gas-phase working fluid.