Seawater => Drinking Water - Page 3

nautical62 · 31-01-2009, 18:18

I came across a tow behind one that is powered by your movement through the water instead of electric power and produces about 25 gal/day. Just a bit over 2K. I have no personal experience with it.
Reverse osmosis portable towed yacht watermakers

04 Marine · 11-09-2009, 03:15

Perhaps you addressed the wrong thread. Sounds like an oceangoing still may be more suitable than a watermaker.

Captain Jaz · 31-01-2009, 18:32

Now there's a clever piece of kit!
Good link cheers!
Some one posted an article on building your own in the photo gallery that I saw yesterday for about the same price...
Both out of my price range... but interesting none the less...

Badsanta · 31-01-2009, 19:19

I was not trying to beat you down. I have an inquiring mind and like to figure things out my self. It is great and often easier to improve ideas. But there has been a lot of research in RO and if some one figures out a cheep solution to this they will sell a million of them. But for now its pressure and power. The tow behind only works when making way or if you have a heck of a current at anchor

Captain Jaz · 31-01-2009, 19:33

Fair enough, no worries... Definitely power is a key issue here because of the size of the filters... But a 160GPD only uses 4amps... in this age of miniaturization it must be possible...
I think a major issue here is that people who need smaller machines don't have as much money to spend so aren't as lucrative a market to manufactures/designers.

Who knows... maybe someones already invented or is inventing one....
I shall certainly keep my eyes peeled...

Captain Jaz · 31-01-2009, 19:38

And of course the towed one begs to be converted for use with a free-wheeling prop I'd say....
Some kind of gearing perhaps...

nautical62 · 31-01-2009, 19:55

In addition to not working at anchor, two concerns I'd have with the tow-behind:

1. Shallow water sailing (I like the Bahamas)

2. Not using it for prolonged periods when you are at anchor - I hear non use is often the cause of filter failure.

Still, an interesting innovation I think.

Is using the surface of your boat boat or sails to collect rain water a more cost-effective option for you? I know this isn't as reliable as a watermaker, but it's sure cheaper. It's one reason I've thought of making a hard bimini top some day.

Captain Jaz · 31-01-2009, 20:10

Yea, thats certainly a better option for me, though I've also toyed with the idea of using an evaporation stil, either solar or if i can spare the space maybe in a stowage locker using a sea-water aquarium heater to speed things up...
I'm favouring the second option as it should be less hassle once its set up... if i can spare the power that is...

Captain Jaz · 31-01-2009, 20:14

Aquarium Fish tank Heaters & Thermostats
A 25w heater would heat 5gal to 32c
I should experiment before I try build it tho to see if the amount of water it can produce is worth the power...

Captain Jaz · 31-01-2009, 20:20

Though for people that heat water with the excess power from wind turbines this could be very effective...
But I'd assume that salt water would be very corrosive to the elements, but possibly there's a way around that problem...

Captain Jaz · 31-01-2009, 20:37

Anyone interested in this thread should also check out this one too - DIY Watermaker

meyermm · 31-01-2009, 20:55

I think a thread on Capt Jazz might make great reading - sorry could not help myself - are you English by any chance?

Captain Jaz · 31-01-2009, 21:07

Yes mate... kinda...lol
Raised for 9 years in South Africa and my Dad's french, married a Dutch girl and lived in Holland and Spain with her for a few years... So from all over really, even though I was born here...
Fear not though! I shall be keeping people upto date with my adventures!

meyermm · 31-01-2009, 22:15

Heaven help us I should have realised you would take it as an invitation.

Captain Jaz · 31-01-2009, 22:17

Haha... at this time in the morning I'm halfway through a bottle of rum and will quite happily ramble on about anything!
But then there's nothing worse than a landlocked sailor... especially when he still has over 2 months to kill till he can get his boat...
:P

31-01-2009, 18:32	#3
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Now there's a clever piece of kit! Good link cheers! Some one posted an article on building your own in the photo gallery that I saw yesterday for about the same price... Both out of my price range... but interesting none the less... __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 19:19	#4
Badsanta Registered User Join Date: Oct 2007 Location: virginia Boat: islandpacket Posts: 372	I was not trying to beat you down. I have an inquiring mind and like to figure things out my self. It is great and often easier to improve ideas. But there has been a lot of research in RO and if some one figures out a cheep solution to this they will sell a million of them. But for now its pressure and power. The tow behind only works when making way or if you have a heck of a current at anchor __________________ That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.

31-01-2009, 19:33	#5
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Fair enough, no worries... Definitely power is a key issue here because of the size of the filters... But a 160GPD only uses 4amps... in this age of miniaturization it must be possible... I think a major issue here is that people who need smaller machines don't have as much money to spend so aren't as lucrative a market to manufactures/designers. Who knows... maybe someones already invented or is inventing one.... I shall certainly keep my eyes peeled... __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 19:38	#6
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	And of course the towed one begs to be converted for use with a free-wheeling prop I'd say.... Some kind of gearing perhaps... __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 20:10	#8
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Yea, thats certainly a better option for me, though I've also toyed with the idea of using an evaporation stil, either solar or if i can spare the space maybe in a stowage locker using a sea-water aquarium heater to speed things up... I'm favouring the second option as it should be less hassle once its set up... if i can spare the power that is... __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 18:18	#1
nautical62 Registered User Join Date: Jul 2008 Location: Iowa Boat: Beneteau 32 - Aurora Posts: 774	I came across a tow behind one that is powered by your movement through the water instead of electric power and produces about 25 gal/day. Just a bit over 2K. I have no personal experience with it. Reverse osmosis portable towed yacht watermakers

11-09-2009, 03:15	#2
04 Marine Registered User Join Date: May 2008 Location: California's High Desert, Yucca Valley, CA Boat: Ingrid 38 S/V Semper Fi Posts: 60	Perhaps you addressed the wrong thread. Sounds like an oceangoing still may be more suitable than a watermaker.

31-01-2009, 19:55	#7
nautical62 Registered User Join Date: Jul 2008 Location: Iowa Boat: Beneteau 32 - Aurora Posts: 774	In addition to not working at anchor, two concerns I'd have with the tow-behind: 1. Shallow water sailing (I like the Bahamas) 2. Not using it for prolonged periods when you are at anchor - I hear non use is often the cause of filter failure. Still, an interesting innovation I think. Is using the surface of your boat boat or sails to collect rain water a more cost-effective option for you? I know this isn't as reliable as a watermaker, but it's sure cheaper. It's one reason I've thought of making a hard bimini top some day.

31-01-2009, 20:14	#9
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Aquarium Fish tank Heaters & Thermostats A 25w heater would heat 5gal to 32c I should experiment before I try build it tho to see if the amount of water it can produce is worth the power... __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 20:20	#10
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Though for people that heat water with the excess power from wind turbines this could be very effective... But I'd assume that salt water would be very corrosive to the elements, but possibly there's a way around that problem... __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 20:37	#11
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Anyone interested in this thread should also check out this one too - DIY Watermaker __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 20:55	#12
meyermm Registered User Join Date: Dec 2007 Location: Brisbane Boat: Peterson 44 Posts: 181	I think a thread on Capt Jazz might make great reading - sorry could not help myself - are you English by any chance?

31-01-2009, 21:07	#13
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Yes mate... kinda...lol Raised for 9 years in South Africa and my Dad's french, married a Dutch girl and lived in Holland and Spain with her for a few years... So from all over really, even though I was born here... Fear not though! I shall be keeping people upto date with my adventures! __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

31-01-2009, 22:15	#14
meyermm Registered User Join Date: Dec 2007 Location: Brisbane Boat: Peterson 44 Posts: 181	Heaven help us I should have realised you would take it as an invitation.

31-01-2009, 22:17	#15
Captain Jaz Registered User Join Date: Jan 2009 Location: UK. Boat: Columbia 27' Posts: 340	Haha... at this time in the morning I'm halfway through a bottle of rum and will quite happily ramble on about anything! But then there's nothing worse than a landlocked sailor... especially when he still has over 2 months to kill till he can get his boat... :P __________________ 'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum

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