Commercial Water Heating [RE-wrenches]

[Darryl Thayer]

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Hi all
I have used the standard waste heat recovery exchanger
in laundry mats.  This is a section of drain pipe with
a coil of copper around it.  The problem is the hot
water is drawn when filling the machines and dumped at
a later time, thus the discharge cycle is not in phase
wht the charging cycle.  

Another item is the Air to Air exchanger supplying
heat to the laundry space.  The problem is the fire
hazard of the lint buildup.  The units require
frequent cleaning.  I made and installed one several
years ago, still in use, but I would never take the
risk again.  I asked if I could remove it, but the
owner likes it to much.

On Microturbines, again several years ago, 1995? very
long life, repair, rebuild does not enter picture. 
First Cost out of sight, and efficiency less than
recip engine, 15 to 17% as I remember, but check. 

Daryl
  
--- "Todd Cory, Mt. Shasta Energy Services"
<toddcory at finestplanet.com> wrote:

> One thing I have never seen done at a Laundromat is
> a waste water heat
> exchanger. At a Laundromat most folks wash in hot or
> warm, since it costs the
> same number of quarters to do a load regardless of
> the water temperature. All
> that hot soapy water going down the drain seems like
> a huge BTU waste. One could
> probably steal some of the heat out of those dryer
> exhaust vents too...
> 
> Todd
> Holt Kelly wrote:
> .......wondering if anyone has
> > experience with laundromat level water heating.
> Best systems? Freezing
> > not a big issue.
> > Changing subject a bit. Anyone done any research
> on Capstone
> > microturbines?
> >
> > Holt E. Kelly
> > Holtek Fireplace & Solar Products
> > Waco, TX.



		
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