[bldg-sim] kitchen exhaust heat recovery

[Suneel Gupta]

My concern is that is over simplifying the process.  It is the build up on
the interior pipe walls that is the concern.  I estimate that the drain pipe
temperature will be 15-25 deg C.  If grease builds up anywhere along this
run, you increase the probability of a drain backup over time.  Draining
warm/hot water minimizes the buildup of grease/dirt.  Removing heat from
exiting water will increase likelyhood of buildup on the draining pipe.

Ultimately you need to consider, pipe length, pipe temperature and water
temperature along with how much heat that is being removed.

I hope my comments are not being seen as negative, but more trying to avoid
a very messy situation down the road.

Cheers
Suneel
  -----Original Message-----
  From: Debra Lombard [mailto:dlombard at retec.com]
  Sent: December 8, 2005 9:18 AM
  To: suneel.gupta at energyadvantage.com
  Cc: bldg-sim at gard.com
  Subject: Re: [bldg-sim] kitchen exhaust heat recovery



  We'll that could be determined. Find out at what temperature grease in
water will solidify then find what temperature differential there would be
between the draining hot water before and after the heat exchanger.

  I'm sure Carmine would know.

  Debra Lombard, LEED AP
  Sustainable Design Specialist
  The RETEC Group, Inc.
  900 Chapel St., 2nd Fl - Box 9
  New Haven, CT 06510
  Tel: 203-868-0137
  Fax: 203-773-3657
  dlombard at retec.com


======================================================
You received this e-mail because you are subscribed 
to the BLDG-SIM at GARD.COM mailing list.  To unsubscribe 
from this mailing list send a blank message to 
BLDG-SIM-UNSUBSCRIBE at GARD.COM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20051208/8d828b28/attachment-0005.htm>