| 摘要 |
A solar water desalination unit using a superheater to increase efficiency. Water vapor which comes out of the main evaporation chamber travels through a superheater, increasing its temperature by a few degrees. Then it goes into a condensing heat exchanger where it gives up its latent heat of vaporization to the water in the hot feedwater tank. The main evaporation chamber is fed from this hot feedwater tank. As the solar energy influx increases the temperatures throughout the system increase until the water at the top of the hot feedwater tank begins to boil. At that point the system becomes self-sustaining and continues with only nominal additional solar heat input until the water in the hot feedwater tank becomes saturated with salt and has to be dumped into a secondary evaporator. Use of the superheater allows steam at a few degrees above the boiling point to give up all of its latent heat to water that is near or at the boiling point 100 degrees C.
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