[Bnc-facility-notice] NOTICE - Campus Steam is Off Line - Cooler Cleanroom & Lab Temperatures

[Voorhis, Mark L.]

Dear BNC User,

Another Update... The campus high pressure (Red trend below) steam continues to increase and now the medium pressure steam (Blue trend below) is at normal levels to support cleanroom humidity operation.  The cleanroom humidity is at lower end of the specification with a value of 40% (Normal is 45% ±5%).  The medium pressure steam (at 60 psi) is needed to operate our clean steam generators and cleanroom humidify system.  We started bring the clean steam generators on line at ~5:30AM this morning.  The commissioning process for cleanroom humidity system takes 7-9 hours to allow time for components to heat up and prevent water leaks as the humidifiers are brought back on line.  We hope to have the cleanroom humidity and humification system on line this afternoon.

All lab humidity levels are normal at this time using a lower grade humification system that fully operational.

[cid:image002.png at 01D85D21.DFBED880]

If the campus high pressure steam continues to improve and there are not issues with commissioning the cleanroom humification system this will be my last update.

Regards,

Mark Voorhis
Building Manager
Purdue University
Birck Nanotechnology Center
Office: (765) 494-3036




From: Voorhis, Mark L.
Sent: Sunday, May 1, 2022 4:14 AM
To: 'bnc-facility-notice at ecn.purdue.edu' <bnc-facility-notice at ecn.purdue.edu>
Subject: RE: NOTICE - Campus Steam is Off Line - Cooler Cleanroom & Lab Temperatures

Dear BNC User,

Update... The campus steam continues to struggles to maintain consistent high pressure steam (red trend below).  But the steam pressure is at a level that all the general labs and cleanroom spaces are back to normal temperatures and all building temperature alarms are clear at this time.

[cid:image004.png at 01D85D1E.60D6EDD0]

Will continue to monitor conditions and provide updates as needed.

Regards,

Mark Voorhis
Building Manager
Purdue University
Birck Nanotechnology Center
Office: (765) 494-3036















From: Voorhis, Mark L.
Sent: Saturday, April 30, 2022 8:55 PM
To: bnc-facility-notice at ecn.purdue.edu<mailto:bnc-facility-notice at ecn.purdue.edu>
Subject: NOTICE - Campus Steam is Off Line - Cooler Cleanroom & Lab Temperatures

Dear BNC User,

This evening at 7:15 PM there was a power interruption that caused the campus steam and chilled water to shut down across campus. The campus chilled water to the center is operating at normal levels since the BNC center's chilled water is supplied from the north chiller plant that was not affected.  But the steam pressure coming into the center is at 0 psi (normal is 120psi).

Due to the loss of steam we are starting to see cooler temperatures in the general labs and cleanroom space.  If the steam does not come back on line we could see temperatures cool off down to 55° F in general lab and cleanroom spaces.  This will also have a direct impact on the cleanroom and  general lab humidity as well.

This issue is outside the control of the BNC building operations, but we will continue to monitor building system and will provide updates as conditions change.

Regards,

Mark Voorhis
Building Manager
Purdue University
Birck Nanotechnology Center
Office: (765) 494-3036


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