Convection Oven Design Questions
Convection Oven Design Questions
(OP)
Hello all. I'm a structural engineer involved in the business of steel fabrication. My goal is to design/build an electric convection oven to cure powder-coated parts. I'm in the early stages of design and am attempting to determine some rough operating cost numbers. Here's the specs I have so far-
Interior dimensions of oven- 18'x7'x7'
Power Source- 200A @ 480V 3ph
Required Cure Cycle- 400degF for 30 minutes
I'm looking to cost/benefit the following things-
1. R value of walls/ceiling
2. Heating system/fans/ducting
3. Ability to reduce interior volume when appropriate
4. Supplementary gas/propane heat source
5. Supplementary solar heat source
I'm a little out of my element and could use a little guidance about what it might cost to build/operate a brute force electrical system to accomplish this. Then I can cost/benefit items 1 through 5. Thank you for your time.
-Stuart
Interior dimensions of oven- 18'x7'x7'
Power Source- 200A @ 480V 3ph
Required Cure Cycle- 400degF for 30 minutes
I'm looking to cost/benefit the following things-
1. R value of walls/ceiling
2. Heating system/fans/ducting
3. Ability to reduce interior volume when appropriate
4. Supplementary gas/propane heat source
5. Supplementary solar heat source
I'm a little out of my element and could use a little guidance about what it might cost to build/operate a brute force electrical system to accomplish this. Then I can cost/benefit items 1 through 5. Thank you for your time.
-Stuart





RE: Convection Oven Design Questions
Is this for batch curing or a continuous cycle curing process?
For oven design, about studying the more mundane type which is being sold to domestic households.
I do have specs on two large electric convection ovens that we bought from Pittfield GE over ten years ago but these are over large in sizes and we used them to speed curing time of diagphrams coated with an epoxy system. If you are interest let me know.
RE: Convection Oven Design Questions
RE: Convection Oven Design Questions
If you think you are out of your element now...
There are plenty of companies that manufacture this sort of thing. Do yourself a favor and just go and buy one.
RE: Convection Oven Design Questions
RE: Convection Oven Design Questions
In just a few minutes I came up with the following. It's far from complete.
Can you load parts at room temperature and bring things up to the cure temperature, or do you need to have the oven at temperature first?
If room temperature loading, how quickly do you need to bring the oven up to cure temperature? This will be what determines the heat source sizing.
How quickly do you need to cool it down after the 30 minute bake?
What are the ventilation requirements to address anything that might evolve during the cure?
How uniform does the interior temperature need to be?
How high can the air velocity be without causing problems with the finish?
If you are going to use gas or propane, can you use direct fire, or does it need to be indirect?
Does your insurer and local code require a FM or IRI compliant gas train?
Fire suppression? Safety interlocks?
RE: Convection Oven Design Questions
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RE: Convection Oven Design Questions
RE: Convection Oven Design Questions