Pentair HAFFMANS 006.625 - APPENDIX I HAFFMANS CO2-FORMULA; Example using beer; Example using soft drinks

HAFFMANSICD
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ICD Page 29 of 43
APPENDIX I HAFFMANS CO
2
-FORMULA
Attention! The partial pressure of foreign gases is not included in the calculation.
[][][]
()
[]
EebarpbarpAweightbyCO
T
D
C
atm
+×+×=
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
+°
+
15.273C
2
%
A = conversion factor/compensation factor (1*),
p = gas equilibrium pressure (partial),
p
atm
= atmospheric pressure in bar,
C = product-dependent factor (-10,74*),
D = product-dependent factor (2617,25*),
T = temperature of the liquid in °C,
E = factor for CO
2
value p
20
[kg/cm²], only using in Japan
*The scale is based on the solubility of carbondioxide in beer with an original wort of 12° Plato
and an apparent attenuation of 80% assuming that the atmospheric pressure during the
determination is 760mm Hg.
If the composition of the sample deviates from the above standard, the Haffmans CO
2
formula
should be adjusted for the constants A, C and D.
Example using beer
In beer the solubility of CO
2
per 3° Plato changes by about 1%. This means that the solubility of
CO
2
in beer with an original wort of 9° Plato is about 3% lower is than the solubility of CO
2
in
water. For beer with an original wort of 12° Plato, the solubility of CO
2
is 4% lower.
Example using soft drinks
In soft drinks the solubility of CO
2
per Brix changes by about 1%.
This means that the solubility of CO
2
in soft drinks with a sugar content of 8 Brix is about 8%
lower than the solubility of CO
2
in water. For soft drinks with a sugar content of 10 Brix, the
solubility of CO
2
is about
10% lower.
Converting pressure and temperature values:
Pressure
P(bar) P(psi)/14,5
P(bar) P(kg/cm²)/1,02
Temperature T(°C)
(T(°F)-32)×5/9
Formula for converting of the CO
2
-units CO
2
(g/L) = 2 * CO
2
(volume)
CO
2
(g/L) = 10 * CO
2
(weight%)