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Experimental investigation and data-driven regression models for performance characterization of single and multiple passive chilled beam systems

机译:实验研究和数据驱动的回归模型用于表征单和多被动冷梁系统的性能

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The performance of passive chilled beams is characterized in this study to understand their physical behavior when applied in real indoor environments. Two full-scale experimental studies were conducted to map the performance of passive chilled beams in two different experimental settings: (i) single passive chilled beam testing in a controlled laboratory environment and (ii) multiple passive chilled beams testing in a real open plan office setting. The experimental results were then used to develop regression models for predicting the total cooling capacity and chilled surface temperature of single and multiple passive chilled beams, as a function of water flow rate, water supply temperature, air temperature above the chilled beam and area-weighted uncooled surface temperature in the space. The developed models showed good agreement with experimental results and can be used in building energy modeling tools for system simulation using passive chilled beams. Finally, it was found that the conventional method of predicting the total cooling capacity of a passive chilled beam from individual beam laboratory tests or manufacturers' catalogs may significantly underestimate the system performance in multi-unit configurations. These differences could influence optimal system sizing and commissioning and should be considered in future studies. (C) 2017 Elsevier B.V. All rights reserved.
机译:本研究对无源冷梁的性能进行了表征,以了解其在实际室内环境中的物理行为。进行了两项全面的实验研究,以绘制两种不同实验环境下被动冷梁的性能:(i)在受控实验室环境中进行单被动冷梁测试,以及(ii)在真正开放式办公室中进行多次被动冷梁测试设置。然后,将实验结果用于建立回归模型,以预测单个和多个被动冷却梁的总冷却能力和冷却表面温度,作为水流量,供水温度,冷却梁上方的空气温度和面积加权的函数空间中未冷却的表面温度。所开发的模型与实验结果显示出良好的一致性,可用于建筑能源建模工具中,用于使用被动冷梁进行系统仿真。最后,发现从单个梁实验室测试或制造商目录中预测被动冷梁总冷却能力的常规方法可能会大大低估多单元配置中的系统性能。这些差异可能会影响系统的最佳尺寸和调试,应在以后的研究中加以考虑。 (C)2017 Elsevier B.V.保留所有权利。

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