[labnetwork] Single tube furnace duct temperature

[Paolini, Steven]

James, I am assuming that this is an atmospheric furnace. If so, there's really no concern about exhaust temperature since the "load" end of the tube should have a loose fitting cap with a vent hole in it and the "source" end of the tube should have a transitional fitting to mate tubing to glass. Since the exhaust is always at the load end (called a "scavenger"), there is simply not enough gas going through the quartz tube to add any substantial heat load to your house exhaust.

If the cabinet that houses the heating element has exhaust, most furnace manufacturers will provide a water cooled "radiator" at the top to keep the temperature down. This is quite common on vertically stacked, multi tube furnaces but uncommon for a single. You are welcome to tour our facility and see our arrangement, just E-mail me a couple of days in advance.

Steve "Equipment Dood" Paolini

Harvard Center for Nanoscale Systems


________________________________
From: labnetwork-bounces at mtl.mit.edu <labnetwork-bounces at mtl.mit.edu> on behalf of Goodman, James R <James_Goodman at uml.edu>
Sent: Friday, March 2, 2018 12:29 PM
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] Single tube furnace duct temperature

Good Afternoon colleagues,

We are in the process of installing a donated single tube diffusion furnace. It is an MRL 1018 with an auto loader. Our facilities group is concerned about the temperature of the exhaust and its impact on building systems and ductwork. Does anyone have a system like this that would be willing to take some temperature measurements of the exhaust duct while running at 1000 degC?

Thanks, Jay.

— James Goodman
University of Massachusetts, Lowell
Core Research Facilities
Nano Fabrication Lab
1 University Ave
Lowell MA 01854
978-934-3469
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