A setup for fast cooling of liquids in sealed containers
نویسنده
چکیده
Wepresent a simple layout of a fast cooling system for liquids in sealed containers utilizing the large temperature gradients of cold nitrogen gas. Our system is optimized for about 20 cylindrical containers of 500 cm, but the setup allows for simple upand down-scaling aswell as the use of arbitrary containers.We have characterized the cooling performance of our system experimentally for temperatures of the liquid in the range from room temperature down to the freezing point at≈−2 oC. With our systemwe achieve container cooling times as low as 3min, a significant reduction if compared to cooling timeswith commonmethods in the range of 8 to 40min.Modeling of the cooling process proves that convectionwithin the liquid is crucial for quick heat transfer. For the cases studied here, themost important factor limiting the cooling rate is the thermal conductivity of the container material.
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