Brew Day: Hefeweizen Dunkel-February 21, 2010

Brewday: Hefeweizen Dunkel - February 21, 2010

Recipe Values:

Volume to fermenter[ltr (gal)]:	23.00	Total volume[ltr (gal)]:	26.61	Losses [ltr (gal)]:	3.61
Original Gravity[SG]:	1.056	Colour [SRM(EBC)]:	20.28(39.95)
Mash Efficiency [%]:	75.00%	Bitterness[IBU]:	11.03

Preboil Values:

Mash water volume [ltr (gal)]:	19.65 (5.19)	Mash tun volume [ltr (gal)]:	30.02 (7.93)	Mash tun loses [ltr (gal)]:	2.00 (0.53)
Preboil wort volume [ltr (gal)]:	31.00 (8.19)	@ mash out temp.	31.74 (8.38)	Preboil gravity [SG]:	1.045

Postboil Values:

Evapouration [ltr (gal)]:	6.00 (1.59)	Evapouration Rate [ltr (gal)/hr]:	4.00 (1.06)	Boil time [Minutes]:	90.00
Postboil wort volume [ltr (gal)]:	26.61 (7.03)	@ boiling temp.	27.72 (7.32)	Boiler lose [ltr (gal)]:	2.00 (0.53)
Postboil target gravity [SG]:	1.056	mash items only	1.056

Style: 15B. Dunkelweizen

Description:

Hefeweizen Dunkel internet special - origin unknown

Estimated Original Gravity[SG]: 1.056	Estimated Final Gravity[SG]: 1.014	Alcohol By Volume[%]: 5.58
Bitterness [IBU]: 11.03	Colour [SRM(EBC)]: 20.28 (39.95)
Balance: 0.412	BU:GU ratio: 0.198

Mash schedule

Name	Type	Temperature [C (F)]	Time [Minutes]
Protien Rest	infusion	50.00 (122.00)	10
Sacchrification	infusion	67.00 (152.60)	80

Fermentables

Type	Gravity [SG]	Gravity(%)	Weight [gms (lbs)]	Weight(%)
Barley Roasted Malt (Bairds)	1.001	1.08%	100.00 (0.22)	1.53%
Choc Chit Malt (Joe White)	1.001	1.43%	100.00 (0.22)	1.53%
Crystal Malt Dark (Bairds)	1.001	2.08%	150.00 (0.33)	2.29%
Munich I Malt (Weyermann)	1.012	20.81%	1400.00 (3.09)	21.37%
Pilsner Malt (Weyermann)	1.011	19.83%	1300.00 (2.87)	19.85%
Wheat Malt (Barrett Burston)	1.030	54.77%	3500.00 (7.72)	53.44%

Hops

Hop Utilisation Method: Tinseth

Type	AA(%)	IBU	IBU(%)	Weight [gms (oz)]	Time(minutes)
Hallertau Hersbrucker	2.50%	11.03	100.00%	50.00 (1.76)	90.00

Yeast

Type	Flocculation	Attenuation	Min Temp[C (F)]	Max Temp[C (F)]	Alcohol Tolerance
Weihenstephan Weizen - Wyeast 3068	low	75.00%	18.00 (64.40)	24.00 (75.20)	10% ABV

Estimated required yeast cells (billion):

240.90

Dried yeast (gm):	12.81

No of liquid yeast(Wyeast/Whitelabs) packs:	2.56	(Assumes 94% viability)

Approximate amount of solid slurry (ml):
One hour settling	341.70	(Assumes 25% trub and 94% viability)
One day settling	170.85	(Assumes 25% trub and 94% viability)
Longer than 1 week settling	89.22	(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]
Protien Rest	Infusion	50.00 (122.00)	10	12.23 (3.23)	56.37 (133.47)	1.87
Sacchrification	Infusion	67.00 (152.60)	80	7.42 (1.96)	95.00 (203.00)	3.00

Mash Details

Mash water required [ltr (gal)]:	19.65 (5.19)	Mash tun volume required [ltr (gal)]:	30.02 (7.93)
Grain Weight [gms (lbs)]:	6549.99 (14.44)	Mash gravity @ 100% conversion [SG]:	1.055

Number of batches:

General:

Minimum required efficiency:	75.00 %	Max expected efficiency	84.38 %

Sparges:

Sparge No	Water addition [l]	Expected recovered volume [l]	Required gravity	Max expected gravity
1	5.98	15.50	64.98	76.91
2	15.50	15.50	25.68	30.40
Combined	21.48	31.00	45.33	53.66

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