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Experimental comparison of thermal conditions in office rooms: Diffuse ceiling ventilation, chilled beam system, and chilled ceiling combined with mixing ventilation

机译：办公室房间热条件的实验比较：弥漫吊顶通风，冷梁系统和冷却天花板结合搅拌通风

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摘要

Thermal environments generated by diffuse ceiling ventilation (DCV), chilled beam (CB), and chilled ceiling with mixing ventilation (CCMV) systems were compared at different heat loads. Experiments were carried out in two test chambers, in which a double office layout was investigated near heated windows. The heat load strength was increased from a normal level of 37-40 W/floor-m(2) to a peak load level of 57-64 W/floor-m(2) to observe effects on indoor air thermal conditions and draft discomfort. The target indoor air temperature was 26 +/- 0.5 degrees C in the occupied zone. The results show that the air temperature, air speed, and draft rate levels were reasonable at a normal load and increased slightly at peak load conditions. The CCMV system provided the smallest share of locations in which the draft rate level was higher than 10%. None of the studied systems achieved the category A defined by EN ISO 7730. However, all the systems fulfilled the demands of category B, except for CB, which fell to category C at the peak load conditions by exceeding the draft rate limit in one location. Thermal conditions were at a similar level for the studied systems. However, CCMV may reduce slightly the draft discomfort.
机译：在不同的热负荷下比较了由漫射天花板通风（DCV），冷却梁（CB），冷却梁（CB）和冷却天花板产生的热环境。实验在两个测试室中进行，其中研究了加热窗口附近的双人办公室布局。热负荷强度从正常水平的37-40W /楼层-M（2）增加到57-64W /楼层-M（2）的峰值载荷水平，以观察对室内空气热条件和不适的影响。目标室内空气温度在占用区中为26 +/- 0.5摄氏度。结果表明，空气温度，空气速度和起草率水平在正常载荷下是合理的，并且在峰值负荷条件下略微增加。 CCMV系统提供了最小的位置份额，其中汇率水平高于10％。没有一个研究的系统达到了由en ISO 7730定义的类别。然而，所有系统都满足了B类别的需求，除了CB，通过超出一个位置的汇率限制，在峰值负荷条件下落到CB的CB。 。热条件在研究的系统中处于类似的水平。然而，CCMV可能会减少略微的不适草案。

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