Desalination Seawater Vacuum low Temperature

Desalination Seawater Vacuum at low Temperature 

Desalination of seawater is a process that provides freshwater; its usefulness is necessary well established; its main drawback is its hunger for energy. There are two main methods, distillation and reverse osmosis:  These both techniques, booming (average energy cost (≈ 4.5  kWh / m3 /250 gals. ) are proven systems that have shown their reliability. ( Wikipedia) 

Desalination of seawater is a process that provides freshwater, its usefulness is well established; there are two main methods, distillation, and reverse osmosis; both techniques were booming a major drawback: the cost to the operation which is very energy-intensive. Average energy cost (≈ 4.5 kWh / m3 / 264 gallons). (Wikipedia)

Here is a project of desalination of seawater, which can significantly reduce the price of the produced freshwater.

This method is based on using a vacuum associated with seawater's low boiling temperature, about 50 ° C. (120 ° F). The condensation temperature is about 25 ° C. (77 ° F.).

Note:

Boil water at 25 ° C (77 ° F) under vacuum is the work of the ingenious  Georges Claude in 1930. 

I only adapt his exploit to technology and know-how of today, defining in detail the technical feasibility and demonstrating the economic viability of the process.

This task may be performed by:

1. Thermal solar panels.

2. The regenerative thermal energy (cogeneration) is usually wasted by the condensation of a device, coastal Thermo-electric plants.

3. The regenerative thermal energy (cogeneration) is usually wasted by cooling devices, thermal motor drives, boats, ships or submarines, etc.

The main components are:

Seawater pump 1; Seawater filter 2; sea ​​water tank 3; (These three components are similar to the usual classical devices). Tank warm seawater 4; soft tank condensation of freshwater 5; Freshwater castle 6; input heating circuit 7; circulation pumps 8a, 8b; Fresh water pump 9; fluid detectors 10; solenoid valves 11 a, 11 b; seawater pump 12; Unidirectional valves 13 a- A 13 b; 14 vacuum pump, the vacuum can be performed by a conventional vacuum pump or an alternative element that will be defined later characterized in particular by its low cost and its paltry energy consumption.

The seawater desalination device under vacuum at low temperature integrates science, technology, techniques, and know-how today. It is very effective in energy consumption; Pump pressure is less than 1 ≤1, 1 bar (psi ≤ 16). In practice, it can range from 0.2 to a bar.

See the schematic drawing.

• Operation:
  Seawater pumps 1; the seawater filter 2; sea ​​water tank 3; (No significant change, with conventional devices). Fluid in circuit 7, powered by solar panels and/or cogeneration systems; Pump 8 has to lead the cold seawater to tank 4 via condensation tank 5; seawater pump 12 expelling the concentrated saltwater back to the sea and/or the crystallization apparatus (product of salt of excellent quality).
  All detectors fluids 10, temperature sensors, pressure sensors, fluid levels, range of vacuum; electric valves; Water pumps; Timing; sequencer; emptied non-condensable vapors; hunt the concentrated saltwater; reduces the migration of seawater to freshwater, etc. ... transmit data to the electronic controller (home) to ensure optimal...
  Application:
  
  
  Clean ecological and economical way to convert seawater into freshwater.
  
  
  1. Solar energy Thermal panels.