초록 ▼

Cold and/or heat are produced by a process operated according to the absorption technique and which comprises at least two successive absorption steps of the solute vapor in a solvent. At least one part of the heat evolved in the first absorption step is used to partially vaporize the solution recov

Cold and/or heat are produced by a process operated according to the absorption technique and which comprises at least two successive absorption steps of the solute vapor in a solvent. At least one part of the heat evolved in the first absorption step is used to partially vaporize the solution recovered from the second absorption step, said second absorption step being operated at a lower temperature than the first absorption step. The solution recovered from said second absorption step is brought to higher pressure and partially vaporized with use of the heat evolved in the first absorption step. The resultant solution is then desorbed in a countercurrent contact zone wherein the solution is contacted with a vapor phase generated by heating of this solution.

대표청구항 ▼

A process for producing cold and/or heat, which comprises the following steps of: (a) contacting at least one part of a gas phase comprising a solute with one part of a liquid phase comprising a solvent, in a first absorption step for releasing heat in a first temperature range I1 and recovering a s

A process for producing cold and/or heat, which comprises the following steps of: (a) contacting at least one part of a gas phase comprising a solute with one part of a liquid phase comprising a solvent, in a first absorption step for releasing heat in a first temperature range I1 and recovering a solution S1, (b) contacting at least a part of the solution S1 with another part of the gas phase comprising a solute in at least one second absorption step, in the range I2 lower than I1, for transferring the liberated heat to an external fluid and recovering a solution S2, (c) compressing the solution S2, within a pressure range allowing partial vaporization of the solution S2 resulting from a subsequent predetermined heating, (d) heating at least one part of the compressed solution S2 to partially vaporize said compressed solution S2 by applying at least one part of the heat released in the step (a) in the temperature range I1, thereby partially vaporizing the solution S2 for recovering a liquid-vapor mixture, (e) fractionating the liquid-vapor mixture obtained in step (d) in a counter-current contact desorption zone by contacting a portion of the liquid of the mixture with the vapor phase generated by heating another portion of the liquid with an external heat source, and separately recovering an enriched gas phase of solute and an impoverished liquid phase of solute, (f) condensing the gas phase of solute recovered in step (e) by transferring the condensation heat to an external fluid thereby recovering a condensate, (g) expanding the recovered condensate in at least one step and vaporizing at least a portion of resultant expanded condensate to produce cold, and transmitting said cold to an external fluid, thereby recovering at least one gas phase of solute and feeding at least one part thereof to the step (a), and (h) expanding the impoverished liquid phase of solute recovered in step (e) and feeding it back at least in part to the step (a) for being contacted again with at least one part of the gas from the step (g).