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20-06-2017, 11:57 AM #1
calculate the time to reach a given thickness of ice
Hello everyone
I would like to submit a question.
How can you calculate the time it takes to reach a given thickness of ice that will form a "tube ice" machine with these features:
Aluminum tubes size = 1/2 "
Number of tubes = 750
Height, tubes = 3m
Water volume in pipes = 1,250 m3
Inlet water temperature = + 20 ° C
Brine temperature In = -15 ° C
Brine temperature Out = -13.5 ° C
Refrigerant side volume = 1.6m3
Ambient temperature = + 33 ° C
I tried with this formula but it seems too far from reality.
Calculation of ice / time thickness
X = sqr (T * dt * K) / ρ * cs
X = thickness meters
T = second time
Input minutes process = 10min min
Dt. Glycol solution from 0 ° C = 15 ° C
Thermal conductivity coefficient 5,02E-04 Kal / m. s. ° C
Specific weight h2o 1000 kg / m3
Latent heat of solidification 80Kcal / kg
Ice thickness in mm 7,5mm
Thanks so much