Freezing concentrate

[Beerclouds]

Can i freeze concentrated sap at 8% sugar if i dont have the time to boil right away..i thinkin i could but would like a second or third option...thx

[wobbletop]

Sure. No need to completely freeze it though.

[maple flats]

Dr Tim had a post he made once to give the freezing point on various concentrations. You might be best off stopping it 1-2 degrees above the freezing point. Otherwise it might take too long to thaw it on demand.

[ennismaple]

Absolutely - it should be the sap quality coming out of the freezer as when it went in.

[therealtreehugger]

From my calculations, the freezing point depression of 8% sugar, considering Kf of water, # of types of molecules, and molarity of sucrose at 8%, would be -0.435 deg C. About 1 deg F. I could be wrong, but I think I am at least close.

I know just enough to be dangerous!

[minehart gap]

http://mapletrader.com/community/showthread.php?35762-Refrigerated-bulk-tanks-value

Dr Tim shared a chart that contains freezing point of concentrate on the attached thread.

[wobbletop]

From my calculations, the freezing point depression of 8% sugar, considering Kf of water, # of types of molecules, and molarity of sucrose at 8%, would be -0.435 deg C. About 1 deg F. I could be wrong, but I think I am at least close.

I know just enough to be dangerous!

1F is not -0.4C. :o

Metric is easier. Wink

[DrTimPerkins]

...would be -0.435 deg C. About 1 deg F. I could be wrong, ...

You're right in C, but not in F. -0.435 C = 31.2 F.

Chart attached. I'd suggest starting out a bit higher than your intended set point, and creeping downward from there. Temperature measurements and chilling systems have various errors built into them, so could be a few degrees off. Maybe start at 35 deg F and work downward a little over time, keeping an eye out for icing.

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