| 摘要 |
<p>In the evaporation of a liquid, e.g. water, the liquid is held in a closed vessel at less than ambient pressure and heated to evaporation. The vapor is discharged from the vessel via a pressure-reduction unit to a heat exchanger where it is combined with a gas of a higher temperature and pressure. The gas mixture condenses at a higher temperature and pressure due to the difference in temperature to the liquid remaining in the vessel, thereby surrendering latent heat to the liquid. A suction pipe can be shut off by valves placed before and after the heat exchanger, forming a chamber that operates independently of reduced pressure. An independent claim is also included for a commensurate assembly in which the condensation energy surrendered from the fluid is returned to the process after evaporation. After evaporation vapor is surrendered to a heat exchanger that is then separated from the evaporator chamber by valves. Gas of higher temperature and pressure is then introduced to the heat exchanger from a separate source, thereby raising the condensation temperature and pressure in the heat exchanger. The gas condenses at a higher temperature than in the evaporator chamber. The condensation enthalpy is transferred as energy from the condensate to the residual fluid.</p> |
