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Numerical and experimental study on the characteristics of radiant ceiling systems

机译：辐射顶板系统特性的数值和实验研究

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Insufficient knowledge about characteristics of radiant systems has caused problems in the wider application of the radiant system, such as water condensation, bad thermal comfort, etc. In this study, key characteristics of a radiant system in terms of an inherent relationship between total heat flux and surface temperature were analysed. General models for describing such the relationship were developed and validated by elaborate experimental data. Operation limit region of the radiant system was identified and proposed by plotting key parameters in one surface, including supply water temperature, operative temperature panel surface temperature as well as total heat flux density. It was found that not all of the points within the operation limit region were suitable for practical application in order to avoid water condensation risk in cooling mode and large temperature differences in a vertical direction in heating mode. Evolved forms of operation limit regions for cooling and heating applications were put forward and their characteristics were addressed. The results reported in this paper could help manufacturers as well as engineers to better design, configure and regulate radiant systems for better product development and improved indoor thermal comfort.
机译：对辐射系统特性的了解不足，导致辐射系统的广泛应用出现问题，例如水冷凝，不良的热舒适性等。在本研究中，就总热通量之间的固有关系而言，辐射系统的关键特性分析了表面温度。描述这种关系的通用模型已经开发出来，并通过详尽的实验数据进行了验证。通过在一个表面上绘制关键参数来确定并提出辐射系统的运行极限区域，这些参数包括供水温度，工作温度面板表面温度以及总热通量密度。已经发现，为了避免在冷却模式下发生水凝结风险以及在加热模式下在垂直方向上存在较大的温差，并非操作极限区域内的所有点都适合于实际应用。提出了制冷和制热应用的运行限制区域的演变形式，并阐述了它们的特性。本文报告的结果可以帮助制造商和工程师更好地设计，配置和调节辐射系统，以更好地开发产品并提高室内热舒适度。

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