Liquid flow distribution in compact parallel flow heat exchangers

Ing Youn Chen*, Jhong Syuan Tsai, Chi-Chuan Wang, Kai Shing Yang

*Corresponding author for this work

研究成果: Conference contribution同行評審

摘要

This study experimentally and numerically investigates the single-phase flow into parallel flow heat exchangers with inlet and outlet rectangular headers having square cross section and 9 circular tubes. The effects of inlet flow condition, tube diameter header size, area ratio, flow directions (Z and U type), as well as the gravity are investigated. The experimental results indicate that flow distribution for U type flow is more uniform than Z type flow. Depending on the inlet volumetric flow rate, the flow ratio at the first several tubes can be lower than 50% of the last tube for Z type arrangement, and this phenomenon becomes more and more pronounced with the rising velocity at the intake conduit. The mal-distribution can be eased via reducing the branching tube size or increasing the entrance settling distance at the intake conduit. It is found that the influence of gravity on mal-distribution is negligible and the mal-distribution is associated with the jet flow pattern. The numerical result also shows a small eddy flow formed at the inlet of the first tube by the nearby vortex circulation which would reduce the flow rate to the front tubes.

原文English
主出版物標題2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011
頁面333-337
頁數5
DOIs
出版狀態Published - 29 九月 2011
事件2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011 - Xi'an, China
持續時間: 27 五月 201129 五月 2011

出版系列

名字2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011

Conference

Conference2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011
國家China
城市Xi'an
期間27/05/1129/05/11

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