killian

Recipes 

I boil in a keggle with a banjo burner and my next beer will be a 90min boil.
I have been evaporating around 1-1.5 gallons per hr I think. so should I assume about 1.5 - 2 for a 90 min boil?

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damn I gotta brew something

devaspawn

Recipes 

1.5 to 2.25 would be my guess. Worst case scenario you could add water to the boil if it looks like it's evaporating faster than you planned for.

__________________
Cry 'Havoc,' and let slip the dogs of war;
That this foul deed shall smell above the earth
With carrion men, groaning for burial.

Prim 1: Ogre's Inverted Extra Red Ale
Prim 2: Ogre's Hair of the Dog Imperial Amber Ale
Prim 3: Ogre's Relaxed APA
Sec 1: Honey Blonde Ale with Hefe Yeast
Sec 2: Scotch Wee Heavy
Sec 3: Ogre's Simple Mead
Keg 1: Ogre's Brown Ale
Keg 2: Ogre's Extra Red Ale

killian

Recipes 

Im thinking about saving some of the runnings to top off with about 10-15 minutes left in the boil.

__________________
damn I gotta brew something

BarleyWater

Recipes 

Bad idea. One of the reasons you boil for at least 60 minutes (and why I always boil for 90) is to drive off SMM, the precurser to the dreaded DMS. A chemical that will leave your brewed with a stewed cabbage kind of flavor. I usually just start with a little over 8.5 gallons in the boil to end up with 5 gallons come bottling time.

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Fermenting: Nada
On Tap:Cran Wit, Dr Pepper Dubbel, Cascadian Pale Ale, Dark Chocolate Stout, Imperial Stout, Brown Mild, Schwarzbier
On Board: IIPA

www.franconiabrewing.com

killian

Recipes 

what is your evaporation rate for 90 min?

__________________
damn I gotta brew something

killian

Recipes 

does the amount of liquid being boiled effect the evaporation rate?

__________________
damn I gotta brew something

BarleyWater

Recipes 

Usually around 11%, but it's hot as hell and humid here, so your mileage may vary.

not as far as I no, but the weather and the surface area of your kettle do.

__________________

Fermenting: Nada
On Tap:Cran Wit, Dr Pepper Dubbel, Cascadian Pale Ale, Dark Chocolate Stout, Imperial Stout, Brown Mild, Schwarzbier
On Board: IIPA

www.franconiabrewing.com

devaspawn

Recipes 

yeah i agree with the no add of runnings. adding water to the boil will not cause that though.

__________________
Cry 'Havoc,' and let slip the dogs of war;
That this foul deed shall smell above the earth
With carrion men, groaning for burial.

Prim 1: Ogre's Inverted Extra Red Ale
Prim 2: Ogre's Hair of the Dog Imperial Amber Ale
Prim 3: Ogre's Relaxed APA
Sec 1: Honey Blonde Ale with Hefe Yeast
Sec 2: Scotch Wee Heavy
Sec 3: Ogre's Simple Mead
Keg 1: Ogre's Brown Ale
Keg 2: Ogre's Extra Red Ale

Danek

Recipes 

I've done that and it's worked well. One thing, though - when you add water, it works better if it's just been boiled itself. Adding cold water can kill the boil for a few minutes, which although not the end of the world is a slight PITA.

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Bottle conditioning: Pliny the Elder clone; Tramp's Overcoat Barley Wine
Next up: Vanilla Porter

gonzo brewer

Recipes 

My evap rate runs between 11% and 13%. I set beersmith at 13% and if my volume looks high I crank up a good rolling boil for the last 15 min.

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Primary:Black Friday Pale
Secondary:
Bottled: Founder's Breakfast Stout, Preto Branco (Black Orchard clone)
Kegged:Brown, WCIPA, orange cascade, Amber, Vanilla Porter
On Deck: APA, RyeIPA, Kolsch