Study on the thermal flow analysis of cryogenic chamber for cold climate test of large wind turbine parts

摘要

More and more, spaces that satisfy multiple requirements for wind resources suitable to wind generation are decreasing. However, areas with excellent wind resources and free to civil complaints occupy a large space, although they are exposed to the cryogenic environment. The study conducted a thermal flow analysis of a cryogenic chamber for testing large wind turbine parts exposed to the cryogenic environment. The position of supply air is secured to the upper area to compared cooling efficiencies for each location of various air outlets. The study carried out six analysis for cases with test objects and without. When compared cases with test objects, cases without test objects demonstrated faster cooling speed by 5-100% in a room temperature in the upper supply and down extract types. When compared with other cases, the cases with test objects demonstrated faster cooling speed by 33-132% in upper supply, the center of the opposite extract type. The cooling effect of the air inside a chamber and test objects did not show the same pattern, which implicates the need to consider the cooling efficiency of test objects in a large cryogenic chamber design for testing large parts.