c1377
Well-Known Member
I just brewed my first HB last weekend, and I was not satisfied with the time it took to bring the wort to pitching temp.
So, I got out the calculator and used a little chemistry..
1 cal will raise 1 g of water by 1° C (Specific Heat)
while 80 cal will melt 1 g of ice at 0° C to water at 0° C (Energy of Transformation)
If my stoichiometry is correct:
1 gal of 0° C ice added to 1 gal of 100° C water => 2 gal of 10° C water
2 gal of 0° C ice added to 3 gal of 100° C water => 5 gal of 28° C water
Assuming that wort will have approximately the same Cp as water..
I attempted to boil a 3 gal wort and add 2 gal of ice, to achieve a 5 min cold break.
...problem...
I froze 2 gal of store bought water (for sanitary reasons) with out opening the jugs. The expanding ice burst the jugs. Not wishing to risk contamination I threw 2 new gal jugs in the freezer a couple hours before brewing and used the resultant ice water to partially cool my wort, while placing it in an ice bath.
...Question...
Has anyone else used a similar method?
Any ideas how to prevent the jugs from breaking in the freezer?
Should I even be concerned about contamination in such a scenario?
I would appreciate feedback.
thanks,
Pip
So, I got out the calculator and used a little chemistry..
1 cal will raise 1 g of water by 1° C (Specific Heat)
while 80 cal will melt 1 g of ice at 0° C to water at 0° C (Energy of Transformation)
If my stoichiometry is correct:
1 gal of 0° C ice added to 1 gal of 100° C water => 2 gal of 10° C water
2 gal of 0° C ice added to 3 gal of 100° C water => 5 gal of 28° C water
Assuming that wort will have approximately the same Cp as water..
I attempted to boil a 3 gal wort and add 2 gal of ice, to achieve a 5 min cold break.
...problem...
I froze 2 gal of store bought water (for sanitary reasons) with out opening the jugs. The expanding ice burst the jugs. Not wishing to risk contamination I threw 2 new gal jugs in the freezer a couple hours before brewing and used the resultant ice water to partially cool my wort, while placing it in an ice bath.
...Question...
Has anyone else used a similar method?
Any ideas how to prevent the jugs from breaking in the freezer?
Should I even be concerned about contamination in such a scenario?
I would appreciate feedback.
thanks,
Pip