Originally Posted by ScubaSteve
Things may change when you put grain in the bag. I hear it will scorch the grain for sure.
Steve is right. I demonstrated this last night with my CB20. I wanted to try BIAB. So first, I tried my best to burn the bag on the element with only water. I could not get it to burn/melt/weaken at with 100% power and a full boil.
Feeling confident, I mashed in at 130F, recirculated to 152F...and the pump started to clog. I limped it through the mash (stirring frequently). After removing the bag, I found a nice burnt hole in the bag where it contacted the element. About a cup of grain had escaped - most of it was recaptured by continuing to recirculate into a smaller bag.
There was a nasty smell of cigarette ash through the boil and at the end I found my element was coated in charcoal with several crispy grains wedged in the center of it. Tasted ok, but I can't get past that aroma (yeah, I pitched anyway).The good news:
1. I no longer have to wonder about this question.
2. The CB20 performs BIAB recirculating step mashes nicely (130-152 in 15min, then 152 to mash out in 10 min).
3. The 5gal paint strainer type bag holds 8-9lbs of grain.
4. I got the same efficiency as I normally do (65%) from my coarse crush - expecting better with a finer crush.
5. 4.5 hours start to finish with a 90 minute boil.
6. I get a new kettle/steamer pot to retrofit my CB20 system for more BIAB shenanigans. https://www.pelicansky.com/productdetail.aspx?id=115&cat=72
Thanks to jkarp, ScuabSteve and others who inspired me to try electric brewing. It is fun even when you are destroying things.