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Brews & Views Bulletin Board Service * Brews and Views Archive 2008 * Archive through August 26, 2008 * Hop bag ibu reduction < Previous Next >

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mark taylor
Member
Username: Marktaylo

Post Number: 143
Registered: 06-2003
Posted From: 99.146.98.157
Posted on Wednesday, August 13, 2008 - 11:17 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

I normally use nylon mesh hop bags for my pellet hops when I brew and I'm not sure if I should calculate a lower utilization because of the hop pellets being restricted in a bag? (Usually less than 2 oz. in a 8x10" bag)Boiling my bittering hops for 60 minutes in a 1.058 wort I us 27% as the utilization rate. Should that % be lower when the hops are bagged?
Mark
 

Bill Pierce
Moderator
Username: Billpierce

Post Number: 9119
Registered: 01-2002
Posted From: 24.150.192.193
Posted on Thursday, August 14, 2008 - 03:10 am:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

As far as i can tell, the restriction of the hop bags equals the advantage of pellets over whole hops. That means that if you use pellets in hop bags you can use the same calculations you would for whole hops. I limit the amount to no more than 1.5 oz. per bag.
 

Don Lund
Member
Username: Donlund

Post Number: 112
Registered: 10-2003
Posted From: 71.191.24.136
Posted on Thursday, August 14, 2008 - 05:11 am:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

I use those big paint strainer bags that Home Depot sells. The hops are quite free to roam around in those big bags, it's hard for me to imagine that there is a noticeable IBU loss due to the bag somehow blocking release of bittering.
 

Bob Wall
Senior Member
Username: Brewdudebob

Post Number: 1627
Registered: 11-2004
Posted From: 71.204.51.87
Posted on Friday, August 15, 2008 - 01:56 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

I don't use hop bags unless I have a beer that is heavily hopped like an IPA. In my 10 gallon system, I can do about 7 ounces of all pellet hops before I have to worry about my false bottom getting clogged from my sanitation loop.

My process of using a sanitation loop will create a filter bed of hops on my false bottom. I prefer to use whole or plug hops, but many times I use a mix. When I have a decent amount of whole or plugs I don't even worry.

Any of the hops that make it through the filter bed settle out in primary.
 

Hophead
Senior Member
Username: Hophead

Post Number: 2783
Registered: 03-2002
Posted From: 167.4.1.41
Posted on Friday, August 15, 2008 - 04:46 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

MT, to "enhance" what others have said, if the hops are packed tight into bag, there will be more of a loss than if they are loose. 10% is the norm for lowering AA% in bag.

I personally think there's a bigger difference in what the ACTUAL AA% is compared to what we THINK it is... Especially for stored hops.
 

mark taylor
Member
Username: Marktaylo

Post Number: 144
Registered: 06-2003
Posted From: 99.146.98.157
Posted on Saturday, August 16, 2008 - 02:49 am:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

So Hophead,
are you saying I should figure a 10% loss for pellet hops that are NOT tight in the bag?
thanks
mark