2017/02/22 by Dirk Schulze Grachtrup, D. Schulze Grachtrup, Mathias Kraken +8
Engineering · Physics and Astronomy · #FOS: Physical sciences #Heat Transfer and Boiling Studies #Heat Transfer and Optimization #Instrumentation and Detectors (physics.ins-det) #Spacecraft and Cryogenic Technologies #physics.ins-det
paper · pdf · doi:10.48550/arxiv.1702.07014
9 pages, 7 figures
arxiv created 2017/02/22 · openalex publication_date 2017/02/22 · arxiv updated 2017/02/24 · openalex created_date 2019/08/22 · openalex updated_date 2026/07/28
We present 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 cm3 but the setup allows for simple up- and downscaling as well as the use of arbitrary containers. We have characterized the cooling performance of our system experimentally for liquid temperatures in the range from room temperature down to the freezing point at ~ -2 °C. With our system we achieve container cooling times as low as 3 min, a significant reduction if compared to cooling times with common methods in the range of 8 to 40 min. Modeling of the cooling process proves that convection within the liquid is crucial for quick heat transfer and that the most important factor limiting the cooling rate is the thermal conductivity of the container material.