[Equest-users] Steam humidification

[Fred Betz]

The makeup water is not included the energy that I've been able to tell.

To properly model steam systems in eQUEST I've added a process load that accounts for: make up water and the deaerator. The total energy impact can be significant (20-30%) depending on your system design.

While we're on the topic of steam systems in eQUEST. It would be nice if you could have a separate boiler system for the humidifier from the heating hot water system. We've been using heat recovery chillers and condensing boilers for a lot of projects lately that generate 130F hot water with separate process steam boilers for humidification and/or sterilizers to be more energy efficient, which currently can't be modeled in eQUEST.

Fred


Fred Betz  PhD., LEED AP ®BD+C
Senior Sustainable
Design Consultant



AEI | AFFILIATED ENGINEERS, INC.
5802 Research Park Blvd. | Madison, WI  53719

P: 608.236.1175 | F: 608.238.2614
fbetz at aeieng.com<mailto:fbetz at aeieng.com>  |  www.aeieng.com<http://www.aeieng.com/>



From: Lapierre, Patrick [mailto:plapierre at bpa.ca]
Sent: Monday, December 07, 2015 9:14 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Steam humidification

I'm questionning myself on the calculations made by DOE towards the humidification load.

Does anyone know if the energy necessary to bring cold water make-up to its boiling point is accounted for by DOE?
After a quick look in the engineer's manual, it seems to me as if the humidification load only accounts for the heat of vaporisation of water. As if the water supply is already at it's boiling point.

Did I overlook something?
I need a captain here!


[cid:image001.jpg at 01D13135.444FE750]

Patrick Lapierre_ing.
plapierre at bpa.ca<mailto:plapierre at bpa.ca>   |  www.bpa.ca<http://www.bpa.ca>  |  t: 5143833747x2807

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