Impact of Heat Load Location and Strength on Air Flow Pattern with a Passive Chilled Beam System

摘要：

A chilled beam is a source of natural convection,creating a flow of cold air directly into the occupied zone.Experiments have been conducted in a mock up of an office room to study the air velocities in the occupied spaces.In addition,velocity profiles of a passive beam are registered with underneath heat loads when the cool and warm air flows interact.Experimental laboratory study shows that the underneath heat gains,even when no upward plume is generated and the dummy only affects as a flow obstacle,have a significant effect on the velocity profile.Furthermore in an actual occupied office environment,the thermal plumes and the supply air diffuser mix effectively the whole air volume.The maximum air velocity measured was still below 0.25 m/s with the high heat gain of 164 W/m2.The results demonstrate that a simplified analysis of an undisturbed convection flow can not accurately describe air movement and draught risk.

关键词： Chilled beam Thermal plume Air diffusion Draught risk

作者: Risto Kosonen Pekka Saarinen Alex Hole Hannu Koskela

作者单位: Halton Oy,Vantaa,Finland Finnish Institute of Occupational Health,Turku,Finland Arup,Sydney,Australia

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: 1263-1270

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）