METHOD FOR COLD GENERATION Russian patent published in 2012 - IPC F25B29/00 

FIELD: power engineering.

SUBSTANCE: working fluid is a low-boiling liquid, at the same time two tight tanks are used made as capable of operation at the pressure of up to 2.5 MPa, which communicate with each other by means of a steam pipeline equipped with a controlled relief valve. In the first one the low-boiling liquid is placed at the ambient temperature, preferably, below -20°C, and pressure of around 0.5 MPa, afterwards, the specified tight tanks are thermally insulated, and the tank surface heat exchange is arranged in the tank filled with the low-boiling liquid with the flow of the coolant having the temperature higher than the ambient temperature during the tank filling with the low-boiling fluid. When the pressure of the low-boiling fluid in the cavity of the first tank reaches the level of preferably 2.0 MPa, vapours are discharged from it into the cavity of the second tank, at the same time the heat is released from the surface of the second tank into the coolant flow with the temperature below the temperature of low-boiling substance vapours or to the environment. After thermodynamic characteristics of the working fluid are balanced in both tanks, and prior to recovery of cold stock in the first tank, the condensate is returned into its cavity, emptying the second tank.

EFFECT: higher cold efficiency of the plant and reduction of its weight and dimensions characteristics.

3 cl, 1 dwg