STUDY OF THE COOL-DOWN PROCESS OF A CRYOGENIC VALVE IN LIQUID NITROGEN

摘要：

In order to guide producing practice, numerical simulation of dynamic temperature profile is conducted on a cryogenic valve emerged in liquid nitrogen, which is a typical working status for its cryogenic test. Three calculation models of different statuses, based on revised experiential equations for boiling heat transfer, have been set up. Systematic simulations have been carried out to predict cool-down process of cryogenic valves, focusing on the cool-down time and dynamic temperature profile. Based on the simulation results, an insulation layer is proposed to be attached to the valve stem, avoiding the occurrence of freezing at the top of packing gland during cryogenic test.

作者: T.JIN Y.L.XIA K.TANG B.XU G.B.CHEN

作者单位: Institute of Refrigeration and Cryogenics, Zhejiang University,Hangzhou 310027, P.R. China

会议类型: 国际会议

会议名称: The 22nd International Congress of Refrigeration(第22届国际制冷大会)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-21（万方平台首次上网日期，不代表论文的发表时间）