EcoRenovator  

Go Back   EcoRenovator > Improvements > Conservation
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 02-14-10, 02:31 AM   #1
kbhale
Helper EcoRenovator
 
kbhale's Avatar
 
Join Date: Jan 2010
Location: Evansville IN
Posts: 88
Thanks: 0
Thanked 1 Time in 1 Post
Default Reclaim waste water heat.

City water coming into my home during January measured about 34.7 F - 2 C. To pre-heat the water for the hot water heater, I decided to use the water going down the shower drain.

Finished the hot water heater plumbing tonight. Have it pressured up. No major leaks so far. I arranged shut offs so I can cut out the Pre-warmer. Tomorrow I'll plumb in the drain water from the shower. When I have time I'll add the drain water from the dish washer.





This is the south facing wall of my home. During the summer I hope to add a Solar water heater to the side of the house And add four barrels to pre heat the water.

kbhale is offline   Reply With Quote
Old 02-14-10, 03:40 AM   #2
Piwoslaw
Super Moderator
 
Piwoslaw's Avatar
 
Join Date: May 2009
Location: Warsaw, Poland
Posts: 925
Thanks: 176
Thanked 97 Times in 79 Posts
Default

WOW! You are into soooooo many projects. Lucky!

Are you going to insulate the barrel? And do you think that debris build up on the coils will be a problem?

You know, this may be the first project to reclaim heat from waste water that I've ever seen. I've read many times that waste water has heat that can be reused, but I've never seen it happen. I wish you luck with the project and please keep us updated.
Piwoslaw is offline   Reply With Quote
Old 02-14-10, 08:33 PM   #3
kbhale
Helper EcoRenovator
 
kbhale's Avatar
 
Join Date: Jan 2010
Location: Evansville IN
Posts: 88
Thanks: 0
Thanked 1 Time in 1 Post
Default

I think this is as close to a build and forget as you can get. No moving parts and mostly plastic. Could put some septic Microbe starter in it, let them tend to the cleaning. Be easy to add a small pump to use the water for irrigation

I'll box it in with Styrofoam with the other four barrels to keep the heat in, later.

Right now, I'm trying to figure out how to get the best heat exchange. The coil well pick up some heat but the length only holds about a gallon. If the waste water in the barrel was in motion the coil would pick up more heat. Maybe a air stone.

Next thought would be to put a small metal tank about five gallon, in the barrel in front of the coil to keep the cold water in the warm wast water longer. Like a small bulk storage warming up.
kbhale is offline   Reply With Quote
Old 02-15-10, 02:54 AM   #4
kbhale
Helper EcoRenovator
 
kbhale's Avatar
 
Join Date: Jan 2010
Location: Evansville IN
Posts: 88
Thanks: 0
Thanked 1 Time in 1 Post
Default

Done. So far no leaks. I think, it well take about five more showers to fill the barrel. Then I will find out if the lid or connections will leak. If I remember right, the pressure in the barrel should be close around 14.7 PSI.



This is the done pix.



I put in a length of pipe so that the shower water enters at the bottom of the barrel. To help stir the water. The lid is about an 1/8", maybe 1/4 Centimeter or less thick. The only thing, holding things together is, two slip fittings and pipe glue.



just a before plumbing pix.

Spent less than a hundred on this. I know it will pay for its self. As you see it the heat is bleeding off into the basement. Not sewer.
kbhale is offline   Reply With Quote
Old 02-16-10, 03:14 AM   #5
Piwoslaw
Super Moderator
 
Piwoslaw's Avatar
 
Join Date: May 2009
Location: Warsaw, Poland
Posts: 925
Thanks: 176
Thanked 97 Times in 79 Posts
Default

Quote:
Originally Posted by kbhale View Post
Next thought would be to put a small metal tank about five gallon, in the barrel in front of the coil to keep the cold water in the warm wast water longer. Like a small bulk storage warming up.
A box will have very small surface area compared to its volume, so heat transfer will be slow. Maybe a few small boxes (or cylinders, made out of large diameter pipes), or another coil, plumbed parallel to the first?
Piwoslaw is offline   Reply With Quote
Old 02-17-10, 02:31 AM   #6
kbhale
Helper EcoRenovator
 
kbhale's Avatar
 
Join Date: Jan 2010
Location: Evansville IN
Posts: 88
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by Piwoslaw View Post
A box will have very small surface area compared to its volume, so heat transfer will be slow. Maybe a few small boxes (or cylinders, made out of large diameter pipes), or another coil, plumbed parallel to the first?
I think your very right on this. Found this tonight. Close to the middle of the page.
$1000 solar water heating system -- storage tank
Thanks.
Kevin
kbhale is offline   Reply With Quote
Old 03-18-10, 10:41 AM   #7
Piwoslaw
Super Moderator
 
Piwoslaw's Avatar
 
Join Date: May 2009
Location: Warsaw, Poland
Posts: 925
Thanks: 176
Thanked 97 Times in 79 Posts
Default

Kbhale, why don't you use the grey water for flushing, as Ben did? In your system the greywater is already sitting in a barrel in the basement, just waiting to be pumped to the toilet, so why not?

Last edited by Piwoslaw; 03-18-10 at 10:44 AM..
Piwoslaw is offline   Reply With Quote
Old 03-19-10, 02:35 AM   #8
kbhale
Helper EcoRenovator
 
kbhale's Avatar
 
Join Date: Jan 2010
Location: Evansville IN
Posts: 88
Thanks: 0
Thanked 1 Time in 1 Post
Default

I just installed Glacier Bay Elongated Dual Flush 1.1/1.6 GPF
Glacier Bay Elongated Dual Flush High Efficiency 1.1/1.6 GPF All-in-One Toilet - N2316 at The Home Depot

Without heavy filtration, I be afraid the Grey water would cause the filler parts needing to be replaced to often. Think it better to use rain water for the toilet and the Grey water for roses.

I have a lot of projects in motion now. Main focus is heat and insulation of the home. I have started rain barrels and later on when I build a storage tank in the basement for hot water. I think, I'll build a third one ( 500 gallon about 1*892.7 liters) for rain water and use it for toilet , cloths wash and garden.

Note on toilet: I like it.
kbhale is offline   Reply With Quote
Old 03-25-10, 11:24 AM   #9
GaryGary
Apprentice EcoRenovator
 
Join Date: Nov 2008
Location: SW Montana
Posts: 139
Thanks: 1
Thanked 21 Times in 15 Posts
Default

Hi,
Nice simple setup.

I'd really like to hear how it works out.
Maybe you can measure the temperature of the incoming and outgoing fresh water and get an idea how much of a preheat you are getting?

I've heard that grey water gets pretty smelly after a day of sitting around, but I guess that this might not matter since its all enclosed.

There are a couple articles on grey water heat capture here:
New and experimental solar projects and concepts* for do it yourselfers

The first one is one that Nick Pine and I worked on, but eventually pooped out on. The "Canada Study ..." is a good one.

It seems like the whole idea of recovering heat from grey water does not get enough attention, and that there ought to be a simple way to do it -- maybe you have found it.


Gary
GaryGary is offline   Reply With Quote
Old 04-10-10, 07:39 AM   #10
Piwoslaw
Super Moderator
 
Piwoslaw's Avatar
 
Join Date: May 2009
Location: Warsaw, Poland
Posts: 925
Thanks: 176
Thanked 97 Times in 79 Posts
Default Update?

How's the system doing? Any problems? Did you put any microbes in?

For the last month I think about this project each time I take a shower, and I wonder: With a set-up like this, is it OK to pee while showering? Peeing in the shower is a way to save water (Brazilians Urged to Pee in the Shower to Conserve Water), but will it be too diluted to cause any problems down in the barrel? Will the water be OK for flushing later?

Piwoslaw is offline   Reply With Quote
Reply


Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 05:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design