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Old 12-12-2018, 20:27   #1
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New MIT method for water supply

http://news.mit.edu/2018/sun-device-heats-water-superheated-steam-1211

For the techies here this is worth a read. Not commercialized/ available yet. Tested with salt water, no moving parts, no consumables, solar powered. Not tested on board a boat (yet?)
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Old 12-12-2018, 21:36   #2
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Re: New MIT method for water supply

It is always better to go to the scientific literature than to read news reporting to find out what the potential and limitations of new technologies are. The abstract for this groups most recent paper (that I could find - June 2018) can be found here: https://pubs.rsc.org/en/content/arti...h#!divAbstract

It is a very interesting technology but don't plan to ditch your water maker yet. They expect the systems to be inexpensive, but to only produce 2.5 liters of water per day (with good sunlight) for each square meter of collector area. Also the collector needs to be floating in water. Saltwater is OK, but due to the need to reject salt into the remaining water I think it safe to assume that you can't just have a thin film of water below the collector. If storage were not an issue you could have some sort of fold-up or roll-up system with a large size that you might throw overboard while at anchor.
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Old 12-12-2018, 22:06   #3
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Re: New MIT method for water supply

a company here makes solar powered atmospheric condensers for desert villages in poor remote areas. seems to be the ticket even in low RH areas
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Old 13-12-2018, 01:29   #4
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Re: New MIT method for water supply

A good start but so far rain catchment is about as productive assuming a good size tank. ��
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Old 13-12-2018, 11:12   #5
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Re: New MIT method for water supply

I don't want to rain on anyone's technological developments, but I'm still looking forward to the market entry of a solar powered beer maker. Systems sized appropriately for the crew's expectations and capacities of course and capable of varied brew types. Commercializable at say, one gallon per day per square foot should work for equipping the salon top of a wide beamed beermaran, charter vessel.

It's the water.
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Old 13-12-2018, 11:15   #6
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Re: New MIT method for water supply

Quote:
Originally Posted by ironvalleyfab View Post
a company here makes solar powered atmospheric condensers for desert villages in poor remote areas. seems to be the ticket even in low RH areas


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Old 13-12-2018, 14:02   #7
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Re: New MIT method for water supply

It is a very interesting technology but don't plan to ditch your water maker yet. They expect the systems to be inexpensive, but to only produce 2.5 liters of water per day (with good sunlight) for each square meter of collector area. Also the collector needs to be floating in water. Saltwater is OK, but due to the need to reject salt into the remaining water I think it safe to assume that you can't just have a thin film of water below the collector. If storage were not an issue you could have some sort of fold-up or roll-up system with a large size that you might throw overboard while at anchor.[/QUOTE]


Only 2.5lt/day for a 1sq/m area! So a 1sq/m area will keep 1 person going indefinitely when in a liferaft without using power. Sound useful.
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Old 13-12-2018, 14:29   #8
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Re: New MIT method for water supply

Wonder how much an old school roughly square meter solar still makes in peak sunlight?
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