[Greenbuilding] Drain Waste Heat Recovery

[Carmine Vasile]

Richard: Tom St Louis is again misleading the Greenbuilding Forum. A 
Power-Pipe is a brand of Gravity Film Heat Exchanger ("GFX") made with a 
trade secret manufacturing process stolen from yours truly by Gerald and 
Denis VanDecker; officers of Renewability Energy Inc.

There are reputable Canadian GFX manufactureres that developed their own 
GFX-technology such as Watercycles (http://www.watercycles.ca/) & ReTherm 
(http://www.retherm.com/). They are also made with one or more copper coils 
wrapped around copper tubes. I recently authorized Watercycles to become an 
ETL-Listee so that their GFX's will be able to carry the ELT 
safety-certification Mark. 
(http://www.intertek-etlsemko.com/portal/page/cust_portal/ITK_PGR/)

In fact, comparable GFX's made by two US companies (Smart Drain &  FCCI) and 
two Canadian companies (ReTherm & Renewability) were tested by Natural 
Resources Canada (NRCAN). According their Report, both Power-Pipe models 
exhibited lower effectiveness for equal & unequal coil & drain-flow rates.

There are two basic reasons for this: (1) Any GFX designed for a low coil 
pressure drop will have a lower heat transfer coefficient ("U"); (2) An 
analysis of NRCAN's test results indicate Power-Pipes also have less heat 
transfer area. Therefore, much longer and more expensive Power-Pipes are 
required to save the same amount of energy as the US-made GFX's tested by 
NRCAN.

If any Greenbuilder is interested in receiving a copy of this NRCAN Report, 
please let me know.
Carmine



>From: "Richard Garbary" <richard6 at gmail.com>
>To: Greenbuilding at listserv.repp.org
>Subject: Re: [Greenbuilding] Drain Waste Heat Recovery
>Date: Fri, 29 Jun 2007 10:25:00 -0400
>
>Where does it say the Power-Pipe is the "only Canadian Energy Star Program
>compliant Drain Heat Recovery unit..."
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