Water boils away to steam at 100oC at 1 atmosphere. We are all use to boiling a kettle. But at higher pressure, water boils at higher temperature – at 4 atmospheres it boils at 120oC. Which is the temperature of off boiler chambers in steam engines around the world.
On Everest, we only have 0.6 atmospheres – and water boils at 80oC, too cold to make a cup of set. Go off and cheek! Pressure is lower at the top of mountains.
At 10oC, even some sea water boils – to make fresh rain. You must need a huge area of sea.
If we site a conical tower in a river or sea, and the water reaches 1m above the sea, it boils! This is 1 W, for a tiny atom. So at 2 kW, we produce 360,000 L of steam a second. When we vent the pressure we get 360 L of pure, desalinated water – no salts or contaminants.
Your kettle at home is 5 kW. Follow http://midsummerenergy.co.uk/solar_panel_information/solar-panel-power.html?power=250 for a 250 W solar panel. So from this we will get 0.08 L per second.
0.04 if we allow to pump to a local reservoir. 2Km away. This is a huge volume of water – per second.
We can use it to irrigate 20 fields, and still have water to drink. So 5 farmers get together, and have a vacuum water purifier, sitting in the sea or a river. Villages and towns tended to be build on rivers. For transportation.
The farmers use the water, and it flows back into the river. To be reused by the next village. When it flows back into the sea, it will be a bit browner – but unless you are planning to swim across it, who cares.
For the4 cost of a solar panel, a tower a pump and some tubing you end global hunger and thirst.
Which will save 1 billion lives on Earth ever year. The basic work here was done on my PhD at Sheffield University.A more reasonable idea is to use a 25 kW solar panel - and divide teh water numbers by 10. Still a lot of water.
They didn't give me the PhD – they obviously didn't like such a genius idea. Or rather my supervisor didn't realise how important my ideas were.
1 50x1cm steam plasma tube will convert regular water into 1.2 MW of heat – a steam cycle will produce a constant 120 kW. Which will produce 28 L of fresh water a second. This is the flow rate of the Amazon river, mid-section. And this changes everything.