RE: OT : Plumbing help as well

["Shane Harrison" <shane.harrison@xxxxxxx>]

I am intending to put in the drainage heat recovery shower system on
the
upstairs showers (main showers).  As I understand it some guys up
the
road from me hold patents on the idea and sell the "GFX"
units.  I
visited them and noted the following:
1) You need around 750mm vertical drop somewhere - can't be horizontal
since the outgoing waste water needs to spiral down a wide pipe and
"stick" to the inside edges of this copper pipe.
2) You can run more than one shower through one exchanger but if both
showers are run together efficiency drops and I guess the system may
not
reach equilibrum as quickly and will change when one shower stops?
3) According to them it takes around 30seconds for equilibrum to be
obtained.
4) We are going to use it with solar heating which will be a nice
combination - not much good in the UK I guess :-)

I also visited a house where the guy had installed a "home brew"
heat
recovery system both for ventilation and waste water.  For waste
water
he extracted the heat into water using a heat exchanger (water pump
operated via temp sensor) and had a secondary storage water tank to
store it.

Actually his ventilation heat exchangers weren't home brew IRC. 
However
he lived in a closed up airtight house with very controlled extraction.
Humidity inside was very low and no dust inside.  However I decided
this
wasn't the way I wanted to live with much of the year we like to have
doors open to the outside world.  Depends on climate and type of
living
I guess.

Cheers
Shane

> -----Original Message-----
> From: Simon Coates [mailto:ecolume@xxxxxxx] 
> Sent: Friday, 27 December 2002 11:18 p.m.
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] OT : Plumbing help as well
> 
> 
> Mark,
> 
> http://www.endlessshower.com/install.htm
> 
> I'm going to install a 'home brew' heat recovery system for 
> the ventillation.  I like heat recovery systems :o)  They
are 
> up to 70% efficient - and work well when extracting warm 
> steamy air from bathrooms and showers etc...  The extract air
> passes through a heat recovery chamber (size dependant upon 
> flow rate and air speed) which heats up the replacement incoming
air.
> 
> The drainage heat recovery system is excellent, but I saw it 
> when it was too late to do anything with it - and also we 
> have 4 seperate drains.  What I would have liked to have done
> was divert warm/hot waste water to a large insulated 
> 'holding' tank and either extract the heat with a heat pump, 
> or just simply used the waste water to heat incoming water.  
> The shower drain is a clever idea because it's heating the 
> incoming water when you need it.
> 
> 
> Regards
> 
> Simon
> 
> ----- Original Message -----
> From: Mark Harrison <Mark.Harrison@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: 27 December 2002 09:43
> Subject: RE: [ukha_d] OT : Plumbing help as well
> 
> 
> > Simon,
> >
> > The "heat recovery drain pipe section" sounds
interesting. 
> Do you have 
> > a URL, please?
> >
> > Regards,
> >
> > Mark
> >
> > -----Original Message-----
> > From: Simon Coates [mailto:ecolume@xxxxxxx]
> > Sent: 26 December 2002 23:36
> > To: ukha_d@xxxxxxx
> > Subject: Re: [ukha_d] OT : Plumbing help as well
> >
> > [...]
> >
> > BTW. whilst planning our house refurb and searching for energy
> > efficient stuff I found a clever heat recovery system for 
> drains.  The 
> > hot water from a shower just goes down the drain, but if you use
a 
> > heat recovery drain pipe section to partially heat the cold 
> water you 
> > can make a 10kW shower into something like a 15kW shower, 
> or lower the 
> > flow rate and save energy.  Many large hotels use heat
recovery 
> > systems - around 70% of the heat from waste water can be
extracted.
> >
> > Simon
> >
> >
> > http://www.automatedhome.co.uk
> > Post message: ukha_d@xxxxxxx
> > Subscribe:  ukha_d-subscribe@xxxxxxx
> > Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
> > List owner:  ukha_d-owner@xxxxxxx
> >
> > List of UKHA Groups here - 
> > http://groups.yahoo.com/group/UKHA_Grouplists/
> >
> > Your use of Yahoo! Groups is subject to 
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> 
> 
http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx 
Subscribe:  ukha_d-subscribe@xxxxxxx 
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx 
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here -
http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/







http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx 
Subscribe:  ukha_d-subscribe@xxxxxxx 
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx 
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.