A preliminary method for estimating the effective plume chimney height above a forced-draft air-cooled heat exchanger operating under natural convection

被引：13

作者：

Chu, CM ^{[1
]}

机构：

[1] Univ Malaysia Sabah, Sch Engn & IT, Chem Engn Program, Kota Kinabalu 88999, Sabah, Malaysia

来源：

HEAT TRANSFER ENGINEERING | 2002年 / 23卷 / 03期

关键词：

Computer simulation - Heat transfer - Natural convection - Thermal load - Thermal plumes;

D O I：

10.1080/014576302753605321

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A preliminary method to estimate the plume chimney height for a still ambient condition is presented here. The method predicts a negligible plume chimney effect on the laboratory-size test exchanger Measurements from an industrial-size heat exchanger (2.4 x 60 m(2)) in forced-draft mode have been compared with simulations incorporating the new method. The simulated heat toads agree with the 11 measurements to within +25/-40%, compared to an average of +70% if calculated by an existing formula and -75% by assuming negligible effective plume chimney height. Agreement between the new method and the measured exchanger performance did not appear to be affected by wind speeds in the range 2-6 m/s.

引用

页码：3 / 12

页数：10