Water cooled air conditioners / water heaters - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Chat  
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 11-28-2010
graypenguin's Avatar
Junior Member
 
Join Date: Mar 2010
Location: Charlotte NC
Posts: 15
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
graypenguin is on a distinguished road
Water cooled air conditioners / water heaters

Does anyone know how hot the water coming out of a water-cooled air-conditioner gets? I was thinking it might be a good idea to run the "heated" water through a water tank that has the heat exchanger option.

I would think that it would be at least 15 to 20 degrees hotter coming out then going in, so maybe 90 degrees....
__________________
Wind Dragon
78 Hunter 33_77-83 Cherubini
Boats are real expensive, but not quite as expensive as West Marine. -- Maverick1958
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 11-28-2010
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 13 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
No, it doesn't get that warm. Water has a very high heat capacity, and it only heats a few degrees above ambient when used in a heat exchanger for an AC unit. Certainly not at a temperature where the difference would be useful to heat water.

I'd point out that the additional resistance of the heat exchanger coil in the hot water heater would also put a strain on the raw water pump for your A/C system, and that most are undersized as it is and would lead to them failing sooner.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 11-28-2010
deniseO30's Avatar
1934 Chickering
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,474
Thanks: 53
Thanked 103 Times in 93 Posts
Rep Power: 10
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Talking

To get "hot" water off of a AC, refrig, or central ac unit,water or air cooled, One would need a heat exchanger on the high temp high pressure line right off the compressor.(the discharge line before it goes into the present condenser) That line is always well above 100 degrees when the comp is running. Most marine units under 24,000 btuh are too small to make enough hot water to be useful by use of a discharge gas H/X

The existing condenser (water or air) would become secondary but still necessary.

On larger water cooled units using geothermal, closed loop or well water there is a control that modulates the flow of water through the heat exchangers that keep the operation pressures constant. This modulating water valve is very common on larger units, it controls the water flow rate via the pressure of the refrigerant. In general, of any type unit will heat the condensing water only about 10 degrees, unless in reverse cycle, then then it would be 10 degrees lower.


Metrex Valve: Water Regulating Valves for HVAC Commercial, Marine&Nuclear

For any larger unit a discharge gas h/x is still the way to heat water and it requires cutting into the refrigerant lines and all the usual hvac routines to install it.

You would get more heat, from a diesel inboard H/X actually. or even a solar collector instead a little 16,000 btuh or so boat a/c.

Work vs return? not worth the trouble.
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by deniseO30; 11-28-2010 at 03:43 PM.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Flushing a sea water cooled Diesel casey1999 Diesel 6 11-04-2010 09:26 AM
Raw water cooled issues and hot water davidpm Diesel 5 11-12-2009 06:11 PM
Raw water cooled issues? davidpm Diesel 5 11-10-2009 10:15 PM
Raw water cooled engines Neicy Gear & Maintenance 10 05-16-2005 01:14 AM
Raw-Water-Cooled Engine Mark Matthews Gear and Maintenance Articles 0 12-26-2001 08:00 PM


All times are GMT -4. The time now is 05:08 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.