CONVECTIVE HEAT TRANSFER TO CO{sub}2 AT A SUPERCRITICAL PRESSURE FLOWING VERTICALLY UPWARD IN TUBES AND AN ANNULUS CHANNEL

摘要

Extensive experiments on heat transfer at a supercritical pressure to CO{sub}2 in tubes and annular channels have been performed. The geometries of the test sections include tubes of an internal diameter of 4.4 and 9 mm and an annular channel (8 × 10 mm). Based on the test results a set of correlations, which covers a deteriorated heat transfer regime as well as a normal heat transfer regime, was developed.