Re: [GBlist] 100% efficient electric heat?

[Renewable News Network <rnn@rnn.com>]

Dear Heidi,

Where are you and what's your existing hot water fuel, which would become 
the back up fuel. 

PV can be used effectively for the heat transfer loop circulating pump.
However, compared with solar thermal collectors, PV panels are five times
less efficient and three times more expensive per collector area.  Solar
domestic hot water systems (flat plate collectors with solar hot water
tanks) are a standardized recommended mature technology.

Yours truly,
Ross

On Thu, 4 Jan 2001, Heidi Hirvonen wrote:

> My husband and I just bought a house and we will need to replace the hot
> water heater.  We are also hoping to use photovoltaic cells.  I am still
> struggling with what some alternative choices to the traditional hot water
> heater would be.  I thought that the tankless electric hot water heater was
> starting to make sense if coupled with PV cells but now I'm not so sure!
> Advice?  Guidance?  Choices?  Resources?
> 
> thanks much,
> 
> Heidi
> 
> 
> ----- Original Message -----
> From: "RET John" <retjohnd@home.com>
> To: "John Herbert" <john.herbert@kelcroft.com>
> Cc: "Green Builders Server list" <greenbuilding@crest.org>
> Sent: Friday, April 27, 2001 8:45 PM
> Subject: [GBlist] 100% efficient electric heat?
> 
> 
> > on 4/27/01 21:41, John Herbert at john.herbert@kelcroft.com wrote:
> >
> > Friday, April 27, 2001 22:37
> >
> > > Of course, Carmine was referring to a "local" efficiency,
> > > Malcolm is correct, at the best plants in the world the overall
> > > energy conversation efficiency is at best only 36%, mainly
> > > due the primer mover loss and transmission losses.
> >
> > and that is stretching it at 36%..........to bad so many peopel have been
> > led to belive that electric heat is 100% efficient. My father bought that
> > lie back in the 60's and had $1,500 dollar electric bills.......the all
> > electric hoem was teh wave of the future just like nuclear power that
> would
> > be to so cheap you would not have to meter it!
> > >
> > > Electric water heating is convenient to the home user,
> > > but the overall efficiency is very, very low indeed.
> >
> > very well stated John..........
> > Electric heat is NOT 100% efficient, at the end use......one's home nor in
> > the over all cycle or start to finished product. This is what people like
> > Carmine need to understand. They need to look at the BIG picture and not
> > just how it is used in your home. Also you need to convert all energy
> bought
> > by you to cost per MM/BTU's.........and then add the environmental and
> other
> > societal costs associated with that source of energy. Then and only then
> > does the true picture emerge. Sad to say it does NOT favor fossil
> > fuels..........
> > --
> > Sincerely,
> >
> > John D'Angelo
> >
> > Renewable Energy Technologies
> > 877 S. Cole Dr.
> > Lakewood, Colorado 80228-3021
> > USA
> >
> > 303-601-4254 Voice mail
> > 509-562-9579 Fax
> > 303-601-4254 Direct Phone Line
> > Direct email: retjohnd@home.com
> >
> >
> >
> >
> > ______________________________________________________________________
> > This greenbuilding dialogue is sponsored by REPP/CREST, creator of
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> > ______________________________________________________________________
> >
> >
> 
> 
> ______________________________________________________________________
> This greenbuilding dialogue is sponsored by REPP/CREST, creator of
> Solstice http://www.crest.org, and BuildingGreen, Inc., publisher of
> Environmental Building News and GreenSpec http://www.BuildingGreen.com
> ______________________________________________________________________
> 


______________________________________________________________________
This greenbuilding dialogue is sponsored by REPP/CREST, creator of
Solstice http://www.crest.org, and BuildingGreen, Inc., publisher of
Environmental Building News and GreenSpec http://www.BuildingGreen.com
______________________________________________________________________