salt water to fresh water and salt - full technical specs for free

[PeaceGen]

Freshwater from seawater using solarpower and off-the-shelf existing components


Freshwater from seawater using solarpower and off-the-shelf existing components, page of



Copylefted (donated to humanity) 2016-08(Aug)-07




Table of Contents
Table of Contents

Motivation, Copyright status, Links

Research notes



Motivation, Copyright status, Links
this idea is copylefted and donated to humanity by me. you are free to implement it entirely on your own and perhaps even turn it into a business where you take a modest percentage of revenue (the food output) to make the thing economically sustainable and interesting-to-scale-up..


Project requirements

• Use low-cost components, preferably off-the-shelf (existing) components, and preferably no expensive maintenance-sensitive components like electrical pumps.
  
  
• Allow for terrain height variations from seawater harvest point at the coast, to the production area (“evaporation area”) (site of seawater evaporation via sunlight to fresh water), to the farming area (other uses for the freshwater have the same terrain height variation requirement).
  

• Schematics and explanations available via https://www.google.nl/webhp?sourcei...client=ubuntu#q=water pump gravity-fed system
  According to http://www.tapstore.com/gravity-fed-water-system you need an elevated water tank at the coast where seawater is sucked up and gravity will provide the force needed to pump it inland to the evaporation area.
  Pumping water up to that initial height at the coast can be achieved without pumps, and is further explained at https://www.quora.com/How-can-we-pu...-than-10-3-meters-How-do-mine-companies-do-it
  

• The actual evaporation process, i had thought of to do in two funnels stuck together with perhaps nothing more than duct-tape, one with the narrow end pointing down and one with the narrow end pointing up above that.. See the picture of a funnel to the right of this bulletpoint.
  But since using 2 funnels creates a salt-harvesting problem (evaporating seawater gives you freshwater and seasalt, which could be sold on the open market) at the actual evaporation point midway between the two funnels, it is probably wiser to go for one funnel (narrow end pointing up) on top of a bucket cover (shown to the right), and probably preferably something that has a screw-thread that matches the wide end of the funnel that is to go above it..
  
  
  
  
  

Research notes
General notes

• https://en.wikipedia.org/wiki/Evaporation
  
  
• https://www.google.nl/webhp?sourcei...-8&client=ubuntu#q=sunlight water evaporation
  

Material choice for the plumbing components

• Saltwater is corrosive, so plumbing for this project has to be seawater resistant.
  Searching resulted in the following links that are of use :
  http://www.wwdmag.com/pipe/overcoming-saltwater-corrosion
  https://www.google.nl/webhp?sourcei...&client=ubuntu#q=seawater+resistant+materials
  
  
• Plastics
  Plastics can be formed into any shape using ‘injection molding’ techniques.
  

• MATCH - HDPE (high density polyethylene)
  LOW COST according to http://endura.com/material-selection-guide/#23
  And a temperature tollerance of 120C long-term
  
  
• MATCH : PET (polyethylene terepthalate)
  Medium high cost according to http://endura.com/material-selection-guide/#26 and temperature range of up to 420 F short duration and up to 250 F (121.1C) long term
  

• PVDF (polyvinylidene fluoride)
  Game-stopper : very costly according to http://endura.com/material-selection-guide/#39
  
  
• PE (polyethylene) (medium or low density)
  Cheap according to http://endura.com/material-selection-guide/#23
  Game-stopper : can’t handle heat in excess of 130F/54.4C
  
  
• PVC
  Moderately cheap according to http://endura.com/material-selection-guide/#38
  Game-stopper : can’t handle heat in excess of 110F long duration
  

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[PeaceGen]

And we *have* to reduce family size by encouraging family planning in all schools, to about 2 or 3 kids per family.
On a global level.

Or this whole feed 'm and keep 'm peaceful that way plan is not going to work at all in the long-term.