A Study of Ventilation Performance of an Underfloor and Overhead Air Distribution System

摘要：

The work presented here is a comparative study on the ventilation performance between underfloor air distribution (UFAD) and overhead air distribution (OHAD) systems set in a typical office environment.The research examined the influence of supply air temperature,supply air volume,and diffuser throw angle on the ventilation performance of both systems within the occupied zone based on the local mean age of air (LMA) index. The study employed both experimental and computer simulation research methods.The findings of the study revealed that for the tested cases of OHAD and UFAD there were no statistically significant differences in the LMA (t = -1.489,p = 0.141) values between like cases of OHAD and UFAD.Given the small margin of difference between the performances of the two tested air distribution systems,either system would provide similar ventilation performance for spaces with characteristics like the ones presented in this study.

关键词： CFD Underfloor air distribution Ventilation Computer simulation Age of air

作者: Jae D.Chang

作者单位: School of Architecture and Urban Planning,University of Kansas,Lawrence,Kansas,USA

会议类型: 国际会议

会议名称: The First International Conference on Building Energy and Environment(第一届建筑能源与环境国际会议)

会议地点: 大连

会议语种:英文

页码: 1202-1209

在线出版日期: 2008-07-01（万方平台首次上网日期，不代表论文的发表时间）