Foldable dome climate measurements and thermal properties
Foldable dome climate measurements and thermal properties
复制标题
可折叠圆顶气候测量和热性能
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
F. Bettonvil
中科院分区：
文献类型：
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作者：
G. Sliepen;A. P. L. Jägers;R. Hammerschlag;F. Bettonvil
作为EST背景下测量可折叠圆顶各个方面的更大项目的一部分，在荷兰技术基金会STW的支持下，我们收集了一年多的连续温度和湿度测量结果，包括La Palma的荷兰开放望远镜（DOT）和Tenerife的GREGOR望远镜的圆顶内外。虽然两个圆顶的结构相似，但DOT圆顶只有一层布，并且位于一个开放的塔的顶部。相比之下，格雷戈里圆顶有双层布，并位于一个塔形建筑的顶部。当圆顶关闭时，这些差异导致温度和湿度绝缘的巨大差异。我们将介绍每个圆顶在一天内的温度和湿度变化，以及全年变化的统计数据。此外，我们将表明，一个可折叠的圆顶的主要优点是近瞬时平衡的体积内的空气最初封闭的圆顶和圆顶外的环境。这种特性允许人们操作望远镜，而不需要昂贵的空调和圆顶皮肤温度控制，以限制圆顶和外壳看到效果。这些测量还提供了有关圆顶所在地天气波动的信息。据观察，在小的时间尺度上，白天的温度波动明显大于夜间。
As part of a larger project for measuring various aspects of foldable domes in the context of EST and with support of the Dutch Technology Foundation STW, we have collected over a year of continuous temperature and humidity measurements, both inside and outside the domes of the Dutch Open Telescope (DOT) on La Palma5 and the GREGOR telescope on Tenerife.6 In addition, we have measured the wind field around each dome. Although the structure of both domes is similar, the DOT dome has a single layer of cloth, and is situated on top of an open tower. In contrast, the GREGOR dome has a double layer of cloth, and is situated on top of a tower-shaped building. These differences result in large differences in temperature and humidity insulation when the dome is closed. We will present the changes in temperature and humidity one can expect for each dome within one day, and the statistics for the variations throughout a year. In addition, we will show that the main advantage of a foldable dome is the near instantaneous equilibration of the air inside the volume originally enclosed by the dome and that of the environment outside the dome. This property allows one to operate a telescope without needing expensive air conditioning and dome skin temperature control in order to limit dome and shell seeing effects. The measurements give also information about the weather fluctuations at the sites of the domes. It was observed that on small time scales the temperature fluctuations are significantly greater during the day than during the night.