公开(公告)号：US20180252433A1

公开(公告)日：2018-09-06

申请号：US15449733

申请日：2017-03-03

Applicant: TRANE INTERNATIONAL INC.

Inventor： Wayne N. KRAFT ,  Nathan WAGERS ,  Dennis Scott BRADBURY ,  Joshua Brian COLEY ,  Sandeep GOWDAGIRI

IPC: F24H3/08 ,  F28F1/06 ,  F28F13/02 ,  B23P15/26 ,  F24D5/02 ,  F24D19/00 ,  F24H9/00 ,  F24H9/18

CPC classification number: F24H3/087 ,  F24D5/02 ,  F24D19/00 ,  F24D2200/04 ,  F24D2220/06 ,  F24H9/0068 ,  F24H9/1881 ,  F24H2210/00 ,  F28D7/085 ,  F28F1/06 ,  F28F1/08 ,  F28F13/02

Abstract: A heat exchanger tube includes a first pass for at least partially combusting a fuel and the first pass having a modified shape including a minor diameter and major diameter that reduces the external pressure drop of an external fluid flowing across the heat exchanger tube. A HVACR system includes a heat exchanger tube with a first heat exchange pass that at least partially combusts a fuel and has a modified shape. A method of making a heat exchanger including configuring a first heat exchange pass such that the major diameter of modified portion of the first heat exchange pass is oriented towards an incoming direction of the process fluid