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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">John,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial Black","sans-serif";color:#3095B4">Jack Paul</span><span style="font-size:7.5pt;font-family:"Arial Black","sans-serif";color:#3095B4">,</span><span style="font-size:9.0pt;font-family:"Arial Black","sans-serif";color:#3095B4">
</span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#56585A">RA, LEED AP BD+C</span><span style="font-size:7.5pt;font-family:"Arial Black","sans-serif";color:#56585A"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#56585A">Laboratory Planner/Programmer<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><i><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#56585A">Vice President<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial Black","sans-serif";color:#56585A">HDR
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#56585A">3200 E Camelback Rd, Suite 250<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#56585A">Phoenix, Arizona 85018<br>
</span><b><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#3095B4">D</span></b><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#56585A"> 602.474.3940
</span><b><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#3095B4">M</span></b><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#56585A"> 602.369.2086<br>
</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#595959"><a href="mailto:jack.paul@hdrinc.com"><span style="color:#595959">jack.paul@hdrinc.com</span></a></span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#595959"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:#595959"><a href="http://hdrinc.com/follow-us" title="Follow us on social media"><u><span style="color:#595959;text-decoration:none">hdrinc.com/follow-us</span></u></a></span><span style="font-size:8.5pt;font-family:"Calibri","sans-serif";color:#595959"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> labnetwork-bounces@mtl.mit.edu [mailto:labnetwork-bounces@mtl.mit.edu]
<b>On Behalf Of </b>John Nicholson<br>
<b>Sent:</b> Wednesday, February 04, 2015 3:22 PM<br>
<b>To:</b> Labnetwork<br>
<b>Subject:</b> [labnetwork] Humidification System Design<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello all,<o:p></o:p></p>
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<p class="MsoNormal"> 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.<o:p></o:p></p>
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Regards,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">John<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:#212121;background:#F7F7F7">-- </span><span style="font-size:10.0pt;font-family:"Courier New";color:#212121"><br>
<span style="background:#F7F7F7">John Nicholson</span><br>
<span style="background:#F7F7F7">Nanofabrication Laboratories Manager</span><br>
<span style="background:#F7F7F7">MassNanoTech Nanofabrication Facility</span><br>
<span style="background:#F7F7F7">Conte Center for Polymer Research, Rm. B111</span><br>
<span style="background:#F7F7F7">University of Massachusetts Amherst</span><br>
<span style="background:#F7F7F7">120 Governor's Drive</span><br>
<span style="background:#F7F7F7">Amherst,MA 01003-9305</span><br>
<span style="background:#F7F7F7">Phone: 413-545-2772</span><br>
<span style="background:#F7F7F7">Fax: 413-577-0165</span></span><o:p></o:p></p>
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