研究了替代工质Ｒ１４２ｂ 在沸腾温度为３２９０ Ｋ 时，在光滑管束和机械加工表面多孔管束外的池沸腾换热性能，并探讨了其换热机理。研究结果表明，Ｒ１４２ｂ 在光滑管束外的池沸腾存在明显的管束效应，而在机械加工表面多孔管束外沸腾出现负管束效应 The boiling heat transfer performance of alternative refrigerant R142b at a boiling temperature of 3290 K outside the smooth tube bundle and machined porous tube bundles was investigated and its heat transfer mechanism was discussed. The results show that there is obvious tube bundle effect in the pool boiling of R142b outside the smooth tube bundle and negative tube bundle boiling effect outside the porous tube bundles on the machined surface