Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Herms
Reply
 
LinkBack Thread Tools
Old 11-24-2012, 07:24 PM   #21
microbusbrewery
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
microbusbrewery's Avatar
Recipes 
 
Join Date: Jan 2011
Location: West Jordan, UT
Posts: 1,140
Liked 87 Times on 67 Posts
Likes Given: 44

Default

Quote:
Originally Posted by disney7
Hey guys, I'm building a HERMS system and I have a question:

If you are using a cooler for a mash tun, why continue to circulate after you have hit your mash temp and things have had a chance to equalize? Doesn't that happen pretty quickly? Why continue to run the pump and HEX?

My current system will maintain a temp with about a degree loss in the MLT cooler over an hour... getting it to the exact temp I want has been the problem thus far and that's why I'm building the HERMS system.

Also, what flow rate do you go for? As much volume as possible without getting a stuck mash/sparge?
I recirculate during the entire mash for a couple reasons. These include wort clarity, ensuring there is no stratification in the MT, and there are reports of better mash efficiency when recirculating compared to not (I think I heard it on Brew Strong but I could be wrong). Not saying you have to do it that way but it works for me.
__________________
http://www.microbusbrewery.org/
microbusbrewery is offline
 
Reply With Quote Quick reply to this message
Old 11-24-2012, 07:27 PM   #22
microbusbrewery
Senior Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
microbusbrewery's Avatar
Recipes 
 
Join Date: Jan 2011
Location: West Jordan, UT
Posts: 1,140
Liked 87 Times on 67 Posts
Likes Given: 44

Default

P.S. I use a pretty low flow rate; 1/2" ball valves are typically between 1/4 and 1/3 of the way open. I've found this allows for good heat exchange in my HEX and prevents the grain bed from compacting.

__________________
http://www.microbusbrewery.org/
microbusbrewery is offline
 
Reply With Quote Quick reply to this message
Old 11-24-2012, 08:40 PM   #23
JuanMoore
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
JuanMoore's Avatar
Recipes 
 
Join Date: Oct 2009
Location: The Old Pueblo
Posts: 16,377
Liked 3220 Times on 3123 Posts
Likes Given: 18

Default

Quote:
Originally Posted by disney7 View Post
Hey guys, I'm building a HERMS system and I have a question:

If you are using a cooler for a mash tun, why continue to circulate after you have hit your mash temp and things have had a chance to equalize? Doesn't that happen pretty quickly? Why continue to run the pump and HEX?

My current system will maintain a temp with about a degree loss in the MLT cooler over an hour... getting it to the exact temp I want has been the problem thus far and that's why I'm building the HERMS system.

Also, what flow rate do you go for? As much volume as possible without getting a stuck mash/sparge?
I actually don't start recirculating until ~10 min into the mash a lot of the time. Since I often heat my strike water in my HLT (always when doing double batches), the water in the HLT won't be at the proper temp for running the HERMS right away. IMO a HERMS is more for maintaining temps, or ramping temps up than it is for hitting your strike temp. If your main goal is hitting your strike temp accurately, building a HERMS isn't the best or easiest answer IMO.

If you take the time to input the mass and specific heat of your MLT, weight and temperature of grains, desired mash thickness and temp into any brewing program, the strike temp it gives you should get you really close to your desired mash temp. Brewtarget is totally free and does a pretty good job. After a couple batches you should be able too fine tune it to hit your mash temp dead on every time. Mashing in slightly thicker than your goal will leave room to add a little cold or boiling water to make slight adjustments. Even if you have your HLT water at the proper temp immediately after mashing in, it may take some time for the mash temp to equalize depending on how much adjustment is required. It's often much faster to mash in slightly thick and add a little hot or cold water.

As for reasons to recirculate throughout the mash, the main two were mentioned above: reduction of temperature stratification in the mash, and wort clarity. Most people keep the flow pretty slow. This helps prevent mash compaction and stuck mashes. It doesn't really need much flow to maintain uniform temps.
__________________
Keezer Soze

Yuri rubs it out with 60 grit... wouldn't even feel a tenga egg. -Randar

, place entry ox dixla to suck. Fcxk fwnpoo and passed. Hel an my spupid ass. OK. - TXCrash
JuanMoore is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
HERMs help insp79 Equipment/Sanitation 12 02-05-2012 10:16 PM
what's new with herms? chrisdb Equipment/Sanitation 7 07-16-2011 02:33 PM
HERMS or RIMS? cwalter13 Equipment/Sanitation 22 04-25-2011 11:42 PM
Confusion about HERMS pennisim Equipment/Sanitation 4 02-01-2011 07:42 PM
Herms Gabe Equipment/Sanitation 20 01-11-2008 05:23 PM