Variation of Leidenfrost temperature in liquid nitrogen pipe chilldown process and its application in chilldown performance analysis

•A reliable model on Leidenfrost temperature of chilldown is suggested.•Re does not affect Leidenfrost temperature in low-conductivity coating tube chilldown process.•A throughout nucleate boiling-dominated chilldown could be caused by micro-fin tube.•Micro-fin pipe can reduce chilldown time and rapidly takes away thermal energy from metal wall.