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Utilization of exhaust waste heat from power plants for sea water desalination | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 13, Issue 4, 2009, Pages 58-68 | ||
| Authors | ||
| Lina Ismail Jassim; Ghanim Kadhem Sada | ||
| Abstract | ||
| The international demand of water increased compared to the available water resources due torecent development water resources for different uses. In many areas especially in Arabian Gulf Areas, a shortage of portable water. This study deals with design a model to combine the multi effect desalination water (MED) with the steam power plant. Using the exhaust waste heat of the power plant to heat the sea water. The model has been based upon various heat and mass transfer equations. Taking in consideration all requirements of making available safe drinking water for requirement. The waste heat of the exhaust gases of power plant is captured before exhausting it to the atmosphere and transferred to salty water. The temperature of salty water rise to level 90C to130C. This is ideal temperature for desalination in multiple effect distillation MED plant. The hot salty water then passes through a flash into the evaporator then condenses on the condenser tube bank, and internal heat recovery is achieved by transferring its heat of condensation to the sea water feed that is thus being preheated. In this study selective an exist steam power plants, combine with MED to produce 1000 m3/day to15000 m3/day drinking water from salty water. The cost of combine MED desalination with power plant was compared with the exist desalination methods, the study show that this system less cost than the other methods of desalination. The model is useful in sizing various components, power plant chimney heat exchanger, evaporation and condensation chambers of desalination plant and useful to find out plant output for various combinations of design parameters. The basic motivation for this research and development is to propose a choice of technical options, based on the use of power plant energy, which could be sustainable and at same time economically. The lowest costs with the multi effect desalination (MED) plants are obtained by utilizing virtually free waste heat of power plant. | ||
| Keywords | ||
| Steam power plant; Waste heat utilization; low cost desalination; MED system | ||
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