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Homeroasters - Home Roasting Coffee Community » THE ART OF ROASTING COFFEE » Roasting Chemistry

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Steam-Punk or Simply Mid-Century Art
oldgearhead	#1 Posted on 06/15/2015 7:58 PM
1 1/2 Pounder Posts: 1128 Joined: February 10, 2011	How do like my latest instrument.Yes, its a 1964 Bacharach Air Velocity Meter. Next step is to find out how much heat it can take. Thankfully I have a 'donor' (bad spring) unit for that because the one pictured is in excellent condition. oldgearhead attached the following image: No oil on my beans...


oldgearhead	#2 Posted on 06/15/2015 8:33 PM
1 1/2 Pounder Posts: 1128 Joined: February 10, 2011	Here is a short study I made to try and explain how my unique roaster works: Chart#1 - Heat watts= 1.0 KW, flow= 50 CFM, air only. Chart#2 - Heat Watts= 1.0 KW, flow= 50 CFM, air only. Chart#3 - Heat Watts= 1.0 KW, flow= 60-38 CFM, beans. PV temperature measurements are taken with a probe located 1.75 inches below the perf plate. BMT is calculated. The resulting coffee from this roast is very good. I adjust only the blower control during each roast. oldgearhead attached the following image: No oil on my beans...


coffeeroastersclub	#3 Posted on 06/15/2015 9:15 PM
Pounder Posts: 535 Joined: May 26, 2009	Is that meter kind of like the electronic one we discussed and I used with my roaster? Except that yours here is all mechanical in nature? Len "If this is coffee, please bring me some tea but if this is tea, please bring me some coffee." ~Abraham Lincoln
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oldgearhead	#4 Posted on 06/15/2015 11:17 PM
1 1/2 Pounder Posts: 1128 Joined: February 10, 2011	Quote coffeeroastersclub wrote: Is that meter kind of like the electronic one we discussed and I used with my roaster? Except that yours here is all mechanical in nature? Len Yes, its a 100% mechanical anemometer,, No oil on my beans...

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