Probably paranoid - recirculating biab

For those who use electricity to fire their BIAB brews.
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Probably paranoid - recirculating biab

Post by aamcle » 1 year ago

I brewed a batch of Galaxy Delight a couple of days ago, my system is a typical recirculating BIAB. The bag is supported by a basket that keeps it off the walls of the outer vessel and off the heating element.

When I mash in I am in effect mashing into the volume of water in the bag obviously this is less than the total volume in the urn. I heat the water in the urn to strike temperature.

Issue 1. as a result of the above the mash in the bag will always start below the target mash temperature.

Water circulates through the grain in the bag relatively slowly.

I seem to have lost the rest of this post my Nexus7 gets a bit flaky some times.


aamcle
Last edited by aamcle on 16 Jan 2016, 23:37, edited 1 time in total.

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Post by thughes » 1 year ago

Even with recirculating, you'll want to give everything a good stir occasionally. I wouldn't concern myself about the initial strike temp, I'm always a bit low and simply raise it up before letting it sit. The bigger problem is being too high initially, very difficult to get the temp back down before the damage is done.

You're fine, go find something else to worry about. ;)


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Post by aamcle » 1 year ago

It's a slow day...


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Post by Lumpy5oh » 1 year ago

I think with the recirculation you are still using the full volume. The water outside the bag is going to be recirulated as well. It is true that the mash in the bag is going to be compacted more but a good stir every few min as thuges suggests will help.
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Post by Mad_Scientist » 1 year ago

We can help you to determine your strike temp, if using the BIABacus, in there is a tool for this. Urn users have a different factor than heavy gauge keg and propane users, for example.

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Post by aamcle » 1 year ago

I think somebody up the thread has more or less suggested an answer, when the recirculation is started "Stir"! While "hands off" is a fine and Shiny Idea a couple of minutes with a large spoon may be just the thing.

I'll check the calculator, I'd be using it if I wasn't glued to a 7" tablet.


Thanks All aamcle

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Post by Mad_Scientist » 1 year ago

Have you heard of USB tethering? Do you have a computer with a larger screen?

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Post by aamcle » 1 year ago

I have, however I'll use a laptop next time I set up to brew. I find for general use the Nexus 7 tops it, the tablet's generally fantastic but hopeless with spread sheets.


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