Hop calculations Flashcards
What is the target IBU in the example for hop addition calculations?
26 IBU
What percentage of α-acids is used in the hop product in the example?
10%
What is the hop utilisation percentage at the addition point in the example?
25%
How much iso-α-acids is needed for 100 hL of beer at 26 IBU?
260 g
What is the relationship between IBU and iso-α-acids?
1 IBU = 1 mg/L iso-α-acids
How many liters are there in 100 hL of beer?
10,000 L
How much α-acids must be supplied to achieve 260 g of iso-α-acids with 25% utilisation?
1,040 g
If 10% of the hop product is α-acids, how much hops is needed to provide 1,040 g of α-acids?
10.4 kg
True or False: Polyphenols can affect the sensory bitterness of beer.
True
What do humulinones contribute to in terms of bitterness relative to iso-α-acids?
66% as bitter
What percentage of bitterness do α-acids contribute compared to iso-α-acids?
10%
What equation can be used to estimate bitterness in beer?
Bitterness = iso-α-acids + (0.66 x humulinones) + (0.10 x α-acids)
What is the concentration of iso-α-acids in the iso-extract mentioned?
30%
What is the utilization percentage of the iso-extract?
90%
How much iso-α-acids needs to be added to 100 hL of beer to achieve an increase of 5 mg/L?
50 g
How much extract is needed to provide 50 g of iso-α-acids with 30% concentration?
166.67 g
What is the required mass of extract to achieve the necessary iso-α-acids accounting for 90% utilisation?
185.18 g
If the density of the iso-extract is 1.075 g/mL, what volume is required for 185.18 g?
172.26 mL
What is the dose rate for dosing the extract across 100 hL of beer?
1.72 mL/hL
