如何利用HTFS+计算套管式换热器? 没用过double pipe,不过根据help中的解释:double pipe exchangers consist of a long, small diameter, shell, with a single tube in it. the tube usually has longitudinal fins extending to the shell, to give extra heat transfer area. double pipe exchangers often have a hairpin inner tube, with a separate shell on each leg. double pipe应该就是套管式换热器查看更多