[labnetwork] Humidification System Design

[Paul, Jack]

John,
We would not recommend the proposed approach to mix the two together.  The building steam system (or campus steam system) will be too contaminated, in particular with amines.  If you are already making clean steam with RO, that should be used without adding in building steam.

A better approach is a steam to steam heat exchanger, using the building steam to heat the RO water.  They never touch since they are in separate coils.  Clean RO in, clean steam out.


Jack Paul, RA, LEED AP BD+C
Laboratory Planner/Programmer
Vice President
HDR
3200 E Camelback Rd, Suite 250
Phoenix, Arizona 85018
D 602.474.3940 M 602.369.2086
jack.paul at hdrinc.com<mailto:jack.paul at hdrinc.com>
hdrinc.com/follow-us<http://hdrinc.com/follow-us>



From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of John Nicholson
Sent: Wednesday, February 04, 2015 3:22 PM
To: Labnetwork
Subject: [labnetwork] Humidification System Design

Hello all,
       We are currently in a design review process for a new class 1000 clean room on campus and the design architects have come up with a scheme that mixes RO steam with the existing building steam (containing softeners and whatever minerals the local city water has) to humidify the clean room. I am of the opinion this is a bad idea. Your opinions would be greatly appreciated as well as references to any design standards (ASHRAE?) you may know of for this type of humidification system.

Regards,
John
--
John Nicholson
Nanofabrication Laboratories Manager
MassNanoTech Nanofabrication Facility
Conte Center for Polymer Research, Rm. B111
University of Massachusetts Amherst
120 Governor's Drive
Amherst,MA 01003-9305
Phone: 413-545-2772
Fax: 413-577-0165
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mtl.mit.edu/pipermail/labnetwork/attachments/20150205/fb5e683b/attachment.html>