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Michael,

It's safe to assume that all power consumed turns into waste heat somewhere down the line.  It's possible that where you went wrong in the 1990's is counting the power available rather than the power consumed.  You are unlikely to consume all 2200 Watts available on each line.  Power consumption for individual components can usually be found in the instrument manual or sometimes on the back of the instrument.  For instance, a computer may have a 400W power supply.  Count that.  The other problem is that the HVAC in a laboratory or a suite has been designed to cool a room based on the heat load from expected laboratory equipment and personnel.  Find out from your building engineer what heat load the HVAC for the room was designed to handle, or for a new facility, make sure that the architect considers the only difference between a 'normal' load and the possibly higher expected load when adjusting capacity.  You may find you only have to consider the additional heat load from the Ti Sapphire laser.

Jeff Larson

-----Original Message-----
From: Confocal Microscopy List [mailto:[log in to unmask]] On Behalf Of Cammer, Michael
Sent: Wednesday, January 30, 2013 9:49 AM
To: [log in to unmask]
Subject: BTU generation by microscope components

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Hi microscopists,

Back in 2011 there was a discussion here about BTUs generated by a microscope (http://lists.umn.edu/cgi-bin/wa?A2=ind1107&L=CONFOCALMICROSCOPY&P=R5803&D=0 ) but I can't find an answer in the archives.

The question is, how many BTUs does a microscope system generate.  To be more specific, how many BTUs does each of these components generate?
1.  Forced air environmental chamber (Plexiglas box by Zeiss or Weatherstation) at 37 degrees C.
2.  EXFO lamp.
3.  AR laser (Lasos).
4.  Two computers and 24 inch screen.
5.  Scan box (Zeiss 710).
6.  MaiTai laser operating at 12 W.
7.  Two people (let's say 75 W each).

Does anybody have calculations for this?

Back in the mid 1990s I summed the maximum power draw into each microscope room and converted to BTUs, but this resulted in excessive cooling.  Does anyone have a source for actual measurements?

Thank you!!

________________________________________________________
Michael Cammer, Assistant Research Scientist Skirball Institute of Biomolecular Medicine
Lab: (212) 263-3208  Cell: (914) 309-3270


Jeffrey M Larson
Confocal Systems Product Manager

Nikon Instruments Inc.
1300 Walt Whitman Road
Melville NY 11747-3064

Office: 631-547-8540    Fax: 631-547-4033
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