Forced-Convection Heat Transfer to Nitrogen in the Vicinity of the Critical Point
In the field of cryogenics, liquid nitrogen has become one of the most commonly used fluids because of its low cost and ease of handling. Most of these uses involve cooldown of equipment and, because of its low cost, such systems are seldom optimized from the standpoint of nitrogen consumption. However, new uses for this cryogen are continually being developed and many of these uses require heat-transfer data. Very little such data exists for cryogenic nitrogen except in the case of pool boiling. The purpose of the present investigation was to study forced-convection heat transfer to nitrogen in the vicinity of its critical point. This area was chosen since deviations from expected behavior are more likely to occur in this region than in any other region.
KeywordsHeat Flux Critical Temperature Nusselt Number Test Section Wall Temperature
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