Keywords: power and desalination integrated systems, thermal desalination, membrane desalination, nuclear desalination, hybrids, power and water costs, repowering, efficiency, environmental impacts, optimisation
New trends in power and desalination integrated systems
Demand for desalinated water has increased sharply in recent years, not only in desert areas but also worldwide. To be able to meet such challenging future demand whilst maintaining reasonable water costs that can be sustained by the end users, real water management should be developed. This should include the limitation of leakages in the water distribution mains, adequate design of end user equipment to optimise water consumption and the adjustment of water quality to the real needs of end users. In addition, desalinated water production has to be increased while reducing more and more the cost of the product water. To achieve this goal, the power and desalination industry is improving the reliability of the processes, designing more efficient processes, integrating power and desalination systems, creating hybrids involving both thermal and membrane desalination processes and revamping or using existing facilities. Energy, capital and operating costs are key parameters of water desalination economics. The optimised integrated system selection has to be envisaged on a case by case basis: the choice will depend on the various specific conditions prevailing on site, which will be the basis of the build-up of the total cost, i.e. capital costs as well as operating costs. This presentation will focus on these various aspects of power and desalination integrated systems.