Brew Day: Black Beer-May 3, 2010

Brewday: Black Beer - May 3, 2010

Recipe Values:

Volume to fermenter[ltr (gal)]:	43.00	Total volume[ltr (gal)]:	45.96	Losses [ltr (gal)]:	2.96
Original Gravity[SG]:	1.052	Colour [SRM(EBC)]:	25.01(49.26)
Mash Efficiency [%]:	75.00%	Bitterness[IBU]:	26.08

Preboil Values:

Mash water volume [ltr (gal)]:	32.40 (8.56)	Mash tun volume [ltr (gal)]:	45.73 (12.08)	Mash tun loses [ltr (gal)]:	1.00 (0.26)
Preboil wort volume [ltr (gal)]:	47.00 (12.42)	@ mash out temp.	48.12 (12.71)	Preboil gravity [SG]:	1.050

Postboil Values:

Evapouration [ltr (gal)]:	2.00 (0.53)	Evapouration Rate [ltr (gal)/hr]:	2.00 (0.53)	Boil time [Minutes]:	60.00
Postboil wort volume [ltr (gal)]:	45.96 (12.14)	@ boiling temp.	47.87 (12.65)	Boiler lose [ltr (gal)]:	2.00 (0.53)
Postboil target gravity [SG]:	1.052	mash items only	1.052

Style: 4C. Schwarzbier (Black Beer)

Description:

Cloned - Recipe from Brett based on Jamil's recipe book

Estimated Original Gravity[SG]: 1.052	Estimated Final Gravity[SG]: 1.013	Alcohol By Volume[%]: 5.22
Bitterness [IBU]: 26.08	Colour [SRM(EBC)]: 25.01 (49.26)
Balance: 1.045	BU:GU ratio: 0.503

Mash schedule

Name	Type	Temperature [C (F)]	Time [Minutes]
Protein rest	infusion	53.00 (127.40)	5
Sacchrification	direct	68.00 (154.40)	60

Fermentables

Type	Gravity [SG]	Gravity(%)	Weight [gms (lbs)]	Weight(%)
Black Malt (Bairds)	1.000	0.33%	50.00 (0.11)	0.46%
Carafa Special Type 1 (Weyermann)	1.001	1.91%	250.00 (0.55)	2.31%
Caramunich Type 2 Malt (Weyermann)	1.001	2.58%	300.00 (0.66)	2.78%
Chocolate Malt (Bairds)	1.001	1.79%	200.00 (0.44)	1.85%
Munich I Malt (Weyermann)	1.024	46.08%	4999.99 (11.02)	46.30%
Pilsner Malt - Bohemian (Weyermann)	1.025	47.30%	4999.99 (11.02)	46.30%

Hops

Hop Utilisation Method: Rager

Type	AA(%)	IBU	IBU(%)	Weight [gms (oz)]	Time(minutes)
Hallertau Hersbrucker	2.30%	6.11	23.43%	40.00 (1.41)	60.00
Super Pride	14.25%	17.00	65.17%	17.96 (0.63)	60.00
Hallertau Hersbrucker	2.30%	2.97	11.39%	57.22 (2.02)	20.00
Hallertau Hersbrucker	2.30%	0.00	0.00%	29.97 (1.06)	0.00

Yeast

Type	Flocculation	Attenuation	Min Temp[C (F)]	Max Temp[C (F)]	Alcohol Tolerance
Bohemian Lager - Wyeast 2124	medium	75.00%	9.00 (48.20)	14.00 (57.20)	9% ABV

Estimated required yeast cells (billion):

846.56

Dried yeast (gm):	45.03

No of liquid yeast(Wyeast/Whitelabs) packs:	9.01	(Assumes 94% viability)

Approximate amount of solid slurry (ml):
One hour settling	1200.80	(Assumes 25% trub and 94% viability)
One day settling	600.40	(Assumes 25% trub and 94% viability)
Longer than 1 week settling	313.54	(Assumes 25% trub and 80% viability)

Note yeast viability reduces greatly over time as demonstrated in the table below.

Age	Viability	Age	Viability
1 week	80%	2 weeks	70%
3 weeks	60%	4 weeks	50%
5 weeks	40%	6 weeks	25%
7 weeks	15%	8 weeks or older	less than 10%

Viability deterioration varies greatly between different yeast strains. You should consider doing a yeast starter for any yeast older than 2 weeks to ensure yeast viability prior to pitching.

Liquor to grist ratio [ltr/kg]:

Saccrification rest - 3.00 to 4.00 [ltr/kg] is recommended.

A lower liquor to grist ratio will produce a less fermentable wort (with more complex sugars) while a higher liquor to grist ratio can result in a more fermentable wort.

Both extremes will require a longer rest time ( up to 90 minutes )

Protein rest - less then 2.50 [ltr/kg] is recommended.

Mash Schedule

Name	Method	Step temp [C (F)]	Step time [minutes]	Addition amount [ltr (gal)]	Addition temp [C (F)]	Liquor/grist ratio [ltr/kg]
Protein rest	Infusion	53.00 (127.40)	5	32.40 (8.56)	57.37 (135.27)	3.00
Sacchrification	Direct	68.00 (154.40)	60	32.40 (8.56)	74.42 (165.96)	3.00

Mash Details

Mash water required [ltr (gal)]:	32.40 (8.56)	Mash tun volume required [ltr (gal)]:	45.73 (12.08)
Grain Weight [gms (lbs)]:	10799.98 (23.81)	Mash gravity @ 100% conversion [SG]:	1.049

Number of batches:

General:

Minimum required efficiency:	75.00 %	Max expected efficiency	84.82 %

Sparges:

Sparge No	Water addition [l]	Expected recovered volume [l]	Required gravity	Max expected gravity
1	6.10	23.50	71.56	82.58
2	23.50	23.50	27.88	32.17
Combined	29.60	47.00	49.72	57.38

Assumed constants:

The following are assumed in calculations below and will eventually be able to be set.

Absorption [l/kg]:	1.3	Grain displacement [l/kg]:	0.67