METHOD FOR OBTAINING A WORKING AGENT IN A COMPRESSED THERMAL PUMP Russian patent published in 2018 - IPC C09K5/04 F25B9/00 

FIELD: motors and pumps.

SUBSTANCE: proposed method relates to the production of a working agent in a compression heat pump, according to which the working agent is composed of a zeotropic mixture of two hydrocarbons that are close in physical properties with the possibility of increasing its boiling point in a countercurrent tube evaporator from the initial value at the inlet lower than the temperature of the heat source with a limited heat capacity at the outlet of the counter-tube space of the counterflow evaporator, to the final value at the outlet of the countercurrent tube evaporator, which is lower than the temperature of the heat source with the limited heat capacity at the inlet to the annular space of the evaporator, and reducing its condensation temperature in a countercurrent tube condenser from the initial value at the inlet greater than the temperature of the heat source with a limited heat capacity at the outlet from the shell side of the condenser, to the final value at the exit of the countercurrent tube condenser, greater than the temperature of the source of heat with a limited heat capacity at the entrance to the annular space of the condenser. Selection of each of the two components of the zeotropic mixture, which are close in physical properties and the molar concentration of its low-boiling component is carried out on the basis of the condition that the difference in the mean condensation and boiling temperatures, determined by the expression indicated, be minimized.

EFFECT: technical result consists in reducing the temperature difference between the working agent from the zeotropic mixture in the evaporator and the condenser of the heat pump to the minimum value corresponding to its maximum energy efficiency.

4 cl, 2 dwg, 2 tbl