topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

07/29/2021 10:07 AM
FontyMuss welcome to HRO! Welcome

07/28/2021 12:33 AM
Welcome, philef

07/26/2021 6:49 PM
Welcome hamachijohn

07/24/2021 2:58 AM
welcome cup Danny

07/21/2021 3:00 AM
Welcome RoastedRight

In Memory Of Ginny
Donations

Latest Donations
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00
Anonymous - 5.00
Users Online
Guests Online: 12

Members Online: 0

Total Members: 7,265
Newest Member: FontyMuss

View Thread

Who is here? 1 guest(s)
 Print Thread
Drum Roaster Heat Transfer to Beans
allenb
A discussion has been ongoing at HRO and other sites about what mode of heat transfer is dominant between conduction, convection and infrared from drum wall depending on specific drum roaster designs. I have contended that with single wall drum, with electric or gas heat being directly applied on the outside of the drum, that IR (infrared), radiating from drum to bean, is dominant over the other two modes and that with all drum roaster designs that heat transfer from conduction is always minimal due to the lack of sufficient contact area of coffee beans.

Still needed to be able to determine to what extent this may or may not be the case, is an accurate reading of drum wall temperature at various locations during a roast. If anyone is able to accurately measure this with a reliable and calibrated IR thermometer, please post your results here and any and all discussion related to this topic is desired.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
"Well tempered roaster" more feedback Roasting Coffee 11 07/30/2021 3:24 PM
Royal Max Roastmaster 9001 (1kg roaster)? Drum Roaster (Store Bought and Commercial) 4 07/29/2021 10:33 AM
Air Fryer Drum Roaster??? Drum Roasters 3 07/29/2021 6:03 AM
Another 1.5kg or 3lb drum roaster from scratch Building a Coffee Roaster 112 07/23/2021 9:49 AM
Bellwether Roaster Drum Roaster (Store Bought and Commercial) 5 07/23/2021 2:24 AM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2021 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX