Brew Day: Imperial IPA-June 1, 2010

Brewday: Imperial IPA - June 1, 2010

Recipe Values:

Volume to fermenter[ltr (gal)]:	20.00	Total volume[ltr (gal)]:	25.68	Losses [ltr (gal)]:	5.68
Original Gravity[SG]:	1.077	Colour [SRM(EBC)]:	9.91(19.52)
Mash Efficiency [%]:	70.00%	Bitterness[IBU]:	157.51

Preboil Values:

Mash water volume [ltr (gal)]:	33.33 (8.80)	Mash tun volume [ltr (gal)]:	39.70 (10.49)	Mash tun loses [ltr (gal)]:	2.00 (0.53)
Preboil wort volume [ltr (gal)]:	28.50 (7.53)	@ mash out temp.	29.18 (7.71)	Preboil gravity [SG]:	1.066

Postboil Values:

Evapouration [ltr (gal)]:	4.50 (1.19)	Evapouration Rate [ltr (gal)/hr]:	3.00 (0.79)	Boil time [Minutes]:	90.00
Postboil wort volume [ltr (gal)]:	25.68 (6.79)	@ boiling temp.	26.75 (7.07)	Boiler lose [ltr (gal)]:	4.00 (1.06)
Postboil target gravity [SG]:	1.092	mash items only	1.078

Style: 14B. American IPA

Description:

From Nov 08 BYO - Jamil Z

Note for hop additions,  2min = flame out, 1min = dry hopping (until recipe tool is fixed)

liquor to grist: 3:1

66C Mash

(collect 24.4 L preboil  SG around 1.061)

chill to 19C

ferment 19C, raising to 21C at end of cycle

rack to a secondary and add dry hop pellets

let sit for 7-10 days then keg or bottle

Estimated Original Gravity[SG]: 1.092	Estimated Final Gravity[SG]: 1.023	Alcohol By Volume[%]: 9.28
Bitterness [IBU]: 157.51	Colour [SRM(EBC)]: 9.91 (19.52)
Balance: 3.545	BU:GU ratio: 1.706

Mash schedule

Name	Type	Temperature [C (F)]	Time [Minutes]
Protien	infusion	52.00 (125.60)	60
Sacchrification	direct	66.00 (150.80)	60

Fermentables

Type	Gravity [SG]	Gravity(%)	Weight [gms (lbs)]	Weight(%)
Ale Malt (Barrett Burston)	1.073	78.69%	8863.94 (19.54)	84.25%
Caramel/Crystal Malt - 40L	1.003	2.77%	328.78 (0.72)	3.12%
Light Dry Extract	1.014	15.55%	1000.00 (2.20)	9.50%
Wheat Malt (Barrett Burston)	1.003	2.99%	328.78 (0.72)	3.12%

Hops

Hop Utilisation Method: Tinseth

Type	AA(%)	IBU	IBU(%)	Weight [gms (oz)]	Time(minutes)
Chinook	13.00%	53.78	34.15%	63.00 (2.22)	90.00
Warrior	15.00%	62.06	39.40%	63.00 (2.22)	90.00
Simcoe	13.00%	18.32	11.63%	25.00 (0.88)	45.00
Columbus	15.00%	23.35	14.83%	33.00 (1.16)	30.00
Centennial	10.50%	0.00	0.00%	40.00 (1.41)	0.00
Simcoe	13.00%	0.00	0.00%	25.00 (0.88)	0.00
Centennial	10.50%	0.00	0.00%	50.00 (1.76)	Hop Tea
Columbus	15.00%	0.00	0.00%	95.98 (3.39)	Hop Tea
Simcoe	13.00%	0.00	0.00%	40.00 (1.41)	Hop Tea

Yeast

Type	Flocculation	Attenuation	Min Temp[C (F)]	Max Temp[C (F)]	Alcohol Tolerance
American Ale - Wyeast 1056	medium-low	75.00%	15.00 (59.00)	22.00 (71.60)	10% ABV

Estimated required yeast cells (billion):

288.75

Dried yeast (gm):	15.36

No of liquid yeast(Wyeast/Whitelabs) packs:	3.07	(Assumes 94% viability)

Approximate amount of solid slurry (ml):
One hour settling	409.57	(Assumes 25% trub and 94% viability)
One day settling	204.79	(Assumes 25% trub and 94% viability)
Longer than 1 week settling	106.94	(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	Infusion	52.00 (125.60)	60	33.33 (8.80)	55.63 (132.14)	3.50
Sacchrification	Direct	66.00 (150.80)	60	33.33 (8.80)	71.27 (160.29)	3.50

Mash Details

Mash water required [ltr (gal)]:	33.33 (8.80)	Mash tun volume required [ltr (gal)]:	39.70 (10.49)
Grain Weight [gms (lbs)]:	9521.50 (20.99)	Mash gravity @ 100% conversion [SG]:	1.145

Number of batches:

General:

Minimum required efficiency:	70.00 %	Max expected efficiency	74.53 %

Sparges:

Sparge No	Water addition [l]	Expected recovered volume [l]	Required gravity	Max expected gravity
1	0.00	19.26	76.13	85.84
2	9.24	9.24	45.95	51.81
Combined	9.24	28.50	66.34	74.81

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