Although the first law of thermodynamics indicates the overall performance of the desalting plants, it does not show the actual losses from each component (i.e. process) of these plants. These can be revealed by an analysis where the second law of thermodynamics is applied to the multieffect, once through multistage flash, and recirculation multistage flash desalting plants. The exergy losses from the different processes in each plant are determined for each stage or effect. The processes of major exergy losses are the vapor condensation (condenser exergy loss), vapor flashing (flashing exergy loss) and feed heating in the brine heater (heating exergy loss). Finally a comparison between the exergy losses is conducted for the three types of plants and for the same gain ratio. The major specific exergy losses are compared for the three plants. It is found that the multieffect plant is the least exergy wasting plant.
|Number of pages||1|
|Journal||Institution of Chemical Engineers Symposium Series|
|Publication status||Published - 1 Jan 1991|
|Event||Proceedings of the Twelfth International Symposium on Desalination and Water Re-use - Malta, Malta|
Duration: 15 Apr 1991 → 18 Apr 1991
ASJC Scopus subject areas
- Chemical Engineering(all)