Effects of preheater arrangement on performance of MED desalination system
| Autor: | Yali Guo, Minle Bao, Shengqiang Shen, Luyuan Gong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
Mechanical Engineering General Chemical Engineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Desalination law.invention 020401 chemical engineering law Heat transfer Air preheater Environmental science General Materials Science Temperature difference 0204 chemical engineering 0210 nano-technology Process engineering business Distillation Evaporator Water Science and Technology |
| Zdroj: | Desalination. 496:114702 |
| ISSN: | 0011-9164 |
| Popis: | Preheating seawater before it flows into the evaporators in multi-effect distillation (MED) system could improve the system performance. The number and position of the preheaters play an important role in the thermal performance. A comparison of systems with different numbers and positions of preheaters was performed. On the premise of the constant distillate production, taking the 10-effect evaporation desalination system as an example, the effects of preheater arrangement on the gained output ratio (GOR) of the system and the total heat transfer area of the evaporators (Atotal) were analyzed. By adopting the equal temperature difference design method, a mathematical model was developed for the system performance analysis under different preheater arrangements. The results indicated that the GOR and Atotal are changed obeying some rules when the position of the preheater changes in one evaporator group or in different evaporator groups. In addition, with the increase in the number of preheaters, the mean GOR rises, the mean Atotal grows and the promotion space of system performance improves. The research provides a certain guiding direction for the optimization of desalination devices. |
| Databáze: | OpenAIRE |
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