Desalinated water production at LNG-terminals
Abstract
A process has been worked out to apply the laws of thermodynamics to sea water desalination making use of LNG.
Ambient temperature heat is applied to LNG which evaporates and generates power. This power is employed to extract heat from sea water; part of the sea water is frozen and the heat is discharged to environment. The ice produced is melted at ambient temperature and desalted water is obtained. Detailed technical calculations have been developed by Nuovo Pignone in the past and cost estimations made for both investment and production costs. At present this is probably the cheapest method of producing desalted water. Conventional technology is used for every component of the resulting plant. This kind of plant may produce quite a substantial amount of desalted water, up to 30.2 tons of water per ton of LNG. Therefore a terminal capacity of 5.10 9 Nm3/yr of natural gas may produce 10,000 t/d of water, equivalent to the needs of a town of 40,000 inhabitants.- Publication:
-
Desalination
- Pub Date:
- 1983
- DOI:
- 10.1016/0011-9164(83)87052-0
- Bibcode:
- 1983Desal..45..383A