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Experimental Assessment on Heat Transfer and Smoke Flow Characteristics of a Typical Elevated Chinese Kang

机译：典型高架康格传热与烟气流动特性的实验评估

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摘要

Chinese kangs are widely used by 175 million people for sleeping and home heating in rural Northern China. However, there are lack of some basic and critical studies on heat transfer and smoke flow characteristics of the kangs, which definitely hinder the development of Chinese kangs. This study presents an experimental assessment on a typically elevated Chinese kang. The heat gain, heat storage, and the heat release performance of the kang body are investigated, respectively, by combining the test data and theoretical analysis. The main results show that the smoke temperature at the inlet face of the kang flue varies within 250 degrees C-600 degrees C as the stove works for the most times. The smoke velocity in the kang flue is about 0.1 m/s-0.4 m/s, and the flow status is determined to be turbulent. The heat exchange between the smoke and the kang plates is mainly by natural convection. The surface temperature of the upper kang plate has significant temporal variation, and its distribution at the center part is reasonably uniform. The radiative heat from the kang plates plays a big role in the total heat release, accounting for 60.6% for the upper plate and 83.3% for the lower plate.
机译：在中国北方农村地区，1.75亿人将中国k广泛用于睡眠和家庭取暖。但是，目前尚缺乏一些有关ang族传热和烟流特性的基础和批判性研究，这无疑阻碍了中国k族的发展。这项研究提出了对典型的中国elevated的实验评估。结合试验数据和理论分析，分别对康体的热吸收，储热和放热性能进行了研究。主要结果表明，随着炉子工作时间的延长，the烟烟道入口面的烟气温度在250摄氏度至600摄氏度之间变化。 ang烟中的烟气速度约为0.1 m / s-0.4 m / s，并且确定流动状态为湍流。烟气与康格板之间的热交换主要是通过自然对流进行的。上k板的表面温度具有明显的时间变化，并且其在中央部分的分布相当均匀。康格板的辐射热在总热量释放中起很大作用，上板占60.6％，下板占83.3％。

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