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Determination of thermal performance of hydronic radiant panel heaters for different fluid flow rates, fluid inlet temperatures and room temperatures
Sādhanā ( IF 1.6 ) Pub Date : 2020-08-05 , DOI: 10.1007/s12046-020-01441-y
TAMER CALISIR , SENOL BASKAYA

An experimental study of a commercially manufactured ceiling type hydronic radiant heating system has been performed in a test room, under controlled temperature conditions. One of the goals was to investigate how the radiant heater, under various operating conditions, affects the temperature distribution inside an occupied room. Another goal was to study the thermal performance of the radiant heating panel for different fluid inlet temperatures, fluid mass flow rates and test room temperatures. In addition, the temperature distribution on top of a surface placed below the heater, representing an actual application, was investigated. From the relevant literature, it was concluded that insufficient knowledge exists about these characteristics. The working fluid was water, and fluid inlet temperatures between 45 °C and 85 °C and mass flow rates of 97 kg/h and 174 kg/h were analyzed. The results showed that an almost linear increase in heat output arises, with the increase in the inlet water temperature. For lower inlet temperatures the heat output is moderately higher for a mass flow rate of \({\dot{\text{m}}}\) = 97 kg/h. The fraction of radiation heat transfer to the total heat transfer increases with decreasing water inlet temperature. It was also observed that, a relatively uniform temperature distribution could be obtained on the plate below the radiant panel. Furthermore, lower vertical temperature differences can be obtained inside the test room, for low water inlet temperature conditions. The obtained results of this study, could give information to manufacturers and building engineers, on the appropriate use and regulation of hydronic radiant systems.



中文翻译:

确定不同流体流速,流体入口温度和室温下水力辐射板加热器的热性能

在受控温度条件下,在测试室中进行了商业生产的天花板型水力辐射供热系统的实验研究。目标之一是研究辐射加热器在各种操作条件下如何影响占用室内的温度分布。另一个目标是研究辐射加热板在不同流体入口温度,流体质量流量和测试室温度下的热性能。另外,还研究了代表实际应用的位于加热器下方的表面顶部的温度分布。从相关文献中得出的结论是,关于这些特征的知识不足。工作流体是水,分析了流体入口温度在45°C和85°C之间以及质量流率分别为97 kg / h和174 kg / h。结果表明,随着进水温度的升高,热量输出几乎呈线性增加。对于较低的入口温度,当质量流量为时,热量输出适度较高\({\ dot {\ text {m}}} \\) = 97 kg / h。辐射热传递占总热传递的比例随着进水温度的降低而增加。还观察到,在辐射板下方的板上可以获得相对均匀的温度分布。此外,对于低进水温度条件,可以在测试室内获得较低的垂直温差。这项研究的结果可以为制造商和建筑工程师提供有关水力辐射系统的适当使用和调节的信息。

更新日期:2020-08-06
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