Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 22-11-2014, 19:11   #61
Registered User

Join Date: Oct 2011
Posts: 42
Re: My Quest for Water - Engineering build on a RO system

Has anyone seem an RO system that was pumped via belt drive off the diesel?

Sent from my Nexus 5 using Cruisers Sailing Forum mobile app
__________________

__________________
theller is offline   Reply With Quote
Old 22-11-2014, 19:39   #62
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,653
Re: My Quest for Water - Engineering build on a RO system

Quote:
Originally Posted by theller View Post
Has anyone seem an RO system that was pumped via belt drive off the diesel?

Sent from my Nexus 5 using Cruisers Sailing Forum mobile app
That's a standard engine driven water maker....send me an email at rich@cruiserowater.com and I will send you a copy of our engine driven water maker manual. You can use it as a template to build one yourself or we sell the unit ready to go along with Echotech and a few other companies I can give you to compair.

But would I recommend and engine driven system? No. I much prefer the electrically driven unit. The engine driven system is the siren song of DIY water makers and I've helped lots of folks salvage what can turn into a disaster when they can't get the engine pump mount done right.
__________________

__________________
Rich Boren Goodbye Morro Bay...Hello La Paz, Mexico and the owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
SV THIRD DAY is offline   Reply With Quote
Old 22-11-2014, 19:53   #63
Registered User

Join Date: Oct 2011
Posts: 42
Re: My Quest for Water - Engineering build on a RO system

Just looking at the system I can make out the fundamentals. Where are you guys sourcing your HP pumps from and what sort of special considerations go into the selection die to the salt water exposure?

Sent from my Nexus 5 using Cruisers Sailing Forum mobile app
__________________
theller is offline   Reply With Quote
Old 22-11-2014, 20:08   #64
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,653
Re: My Quest for Water - Engineering build on a RO system

Quote:
Originally Posted by theller View Post
Just looking at the system I can make out the fundamentals. Where are you guys sourcing your HP pumps from and what sort of special considerations go into the selection die to the salt water exposure?

Sent from my Nexus 5 using Cruisers Sailing Forum mobile app
www.cruiserowaterandpower.com/uploads/sm30.pdf

Read the manual and you will learn a lot about basic water maker technology.
__________________
Rich Boren Goodbye Morro Bay...Hello La Paz, Mexico and the owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
SV THIRD DAY is offline   Reply With Quote
Old 28-10-2017, 10:12   #65
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,046
Re: My Quest for Water - Engineering build on a RO system

Re: My Quest for Water - Engineering build on a RO system
I would have no problem betting a bottle of rum that you will see a competitive product (with chinese manufactured parts) on the market by January 2016 at a much lower price.[/QUOTE]


I would actually be willing to take that bet and up the ante.







Just bumping this thread as it is relevant to the thread it is linked to. Just hoping I might get my really nice bottle of Rum by now.
Tellie is offline   Reply With Quote
Old 28-10-2017, 15:48   #66
Registered User

Join Date: Aug 2015
Location: Marina del Rey
Boat: Hunter 31
Posts: 439
Re: My Quest for Water - Engineering build on a RO system

Quote:
Originally Posted by SV THIRD DAY View Post
There are two ways you can make your better/cheaper water maker.

1. Invent a Hp pump that can generate between 1-3 GPM of flow rate at 800PSI and can withstand long term sea water exposure for less energy than it takes now.

2. Design a new RO Membrane (or similar technology) that does not need 800PSI to have a 99.4% salt rejection.
Rich is totally right that you need to do one of the above to get a less expensive watermaker and I do not think this is possible today. However, you can get a cheaper watermaker by modifying the constraint above.

You can get a second hand manual survivor for $200 off eBay and attach a home made motor to it. It will only produce 1.5 gph of fresh water and you will get hit on the membrane cost ($340) but the total cost will be sub $1,000.

In addition, there is a misting motor with a stainless steel pump that can be had for about $550 (12V motor and pump assembly), called Pumptec 116C, which produces about 0.2 GPM at 800 psi. You can probably fit this to a 14" membrane and make around 3 gph but it will be at the lower limit of flow for the membrane. That is another option for a sub $1,000, 3 gph watermaker. Alternatively, you can feed this into a Survivor 35 membrane and should easily get 3 gph.

These are the best options I have found for a cheap pump/motor assembly that uses stainless steel or plastic pumps.

Another option is to relax the water quality constraint. Have bottled water for drinking and cooking but use a cheap pump/motor/membrane to produce water for everything else, washing, bathing, cleaning. Replace the pump often.

Pizzazz
__________________
Pizzazz is offline   Reply With Quote
Old 28-10-2017, 16:13   #67
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,653
Re: My Quest for Water - Engineering build on a RO system

Quote:
Originally Posted by Tellie View Post
Re: My Quest for Water - Engineering build on a RO system
I would have no problem betting a bottle of rum that you will see a competitive product (with chinese manufactured parts) on the market by January 2016 at a much lower price.

I would actually be willing to take that bet and up the ante.







Just bumping this thread as it is relevant to the thread it is linked to. Just hoping I might get my really nice bottle of Rum by now.[/QUOTE]

I was actually going to say that myself...but I'm trying to turn over a new leaf where I limit my smart a$$ comments to one per week. And right now I'm 4 weeks in the hole already....
__________________
Rich Boren Goodbye Morro Bay...Hello La Paz, Mexico and the owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
SV THIRD DAY is offline   Reply With Quote
Old 28-10-2017, 16:23   #68
Registered User
 
travellerw's Avatar

Join Date: Jan 2014
Location: Martinique
Boat: Fortuna Island Spirit 40
Posts: 1,725
Re: My Quest for Water - Engineering build on a RO system

Quote:
Originally Posted by Tellie View Post
Re: My Quest for Water - Engineering build on a RO system
I would have no problem betting a bottle of rum that you will see a competitive product (with chinese manufactured parts) on the market by January 2016 at a much lower price.

I would actually be willing to take that bet and up the ant




Just bumping this thread as it is relevant to the thread it is linked to. Just hoping I might get my really nice bottle of Rum by now.[/QUOTE]

Come on down to the island chain and collect your bottle. Anything of your choice (I prefer English Harbor these days).

Someone has definately missed the boat on this. I'm both surprised and not surprised. The Chinese are great and killing these niche markets, but unless someone leads them they will never find the nut.

At this point.. I still have 3-5 years of cruising and have no interest in thinking business. Maybe someday.. Maybe not.. My priorities have changed these days!

On the water front.. Our Rainman has produced 100-120L/hour for the first 24 months of our cruising adventure. Here is hoping it continues to perform for the next few years!
__________________
travellerw is offline   Reply With Quote
Old 28-10-2017, 16:32   #69
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,046
Re: My Quest for Water - Engineering build on a RO system

Quote:
Originally Posted by travellerw View Post
I would actually be willing to take that bet and up the ant




Just bumping this thread as it is relevant to the thread it is linked to. Just hoping I might get my really nice bottle of Rum by now.
Come on down to the island chain and collect your bottle. Anything of your choice (I prefer English Harbor these days).

Someone has definately missed the boat on this. I'm both surprised and not surprised. The Chinese are great and killing these niche markets, but unless someone leads them they will never find the nut.

At this point.. I still have 3-5 years of cruising and have no interest in thinking business. Maybe someday.. Maybe not.. My priorities have changed these days!

On the water front.. Our Rainman has produced 100-120L/hour for the first 24 months of our cruising adventure. Here is hoping it continues to perform for the next few years![/QUOTE]

I'll only come down if we drink it together..
I just went out to dinner with Rainmans top guy. I'll pass on your satisfaction with his product next time I see him.
Tellie is offline   Reply With Quote
Reply

Tags
engine, engineer, water

« Solar oven? | Rum »
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engineering Jobs (Yacht) GordMay Boat Ownership & Making a Living 16 18-12-2008 16:28
What to build, what to build... Pura Vida Multihull Sailboats 67 19-05-2008 07:44
NMMA Engineering Seminar GordMay Cruising News & Events 0 02-10-2007 04:47
A little Engineering Help! canatc1 General Sailing Forum 2 19-04-2006 08:23



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:34.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.