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首页> 外文期刊>International communications in heat and mass transfer >Experimental and numerical studies of natural convection from horizontal concrete cylinder heated with a cylindrical heat source
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Experimental and numerical studies of natural convection from horizontal concrete cylinder heated with a cylindrical heat source

机译：圆柱热源加热水平混凝土圆柱体自然对流的实验和数值研究

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Natural convection heat transfer from horizontal concrete cylinder heated with cylindrical heat source was investigated experimentally and numerically. Bare cylinder having a diameter of 9.45 mm was buried in a cylindrical concrete cylinder and thermocouples located outside the copper tube and inside and outside of the concrete cylinder in axial, radial and angular directions. Experiments are conducted at 20℃ and 30℃ ambient temperatures in a conditioned room. Copper cylinder surface temperatures varied between 30-50℃ and 40-50℃ for 20℃ and 30℃ ambient temperatures respectively. In a numerical study, the measured temperatures in the experimental study were used for boundary conditions. Experimental and numerical results were compared and heat transfer enhancement was seen for concrete cylinder. Also the effect of the decrease in the temperature of the copper tube surface was investigated on an ideal Carnot refrigerator. It is found that the enhancement in the coefficient of performance of a Carnot refrigerator is about 35%.
机译：实验和数值研究了用圆柱热源加热的水平混凝土圆柱体的自然对流换热。将直径为9.45mm的裸圆柱体埋入圆柱形混凝土圆柱体中，并将​​热电偶沿轴向，径向和角度方向置于铜管外部以及混凝土圆柱体内部和外部。实验是在环境温度为20℃和30℃的条件下进行的。铜筒表面温度分别在20℃和30℃环境温度下在30-50℃和40-50℃之间变化。在数值研究中，将实验研究中测得的温度用于边界条件。比较了实验和数值结果，发现了混凝土圆柱体的传热增强。在理想的卡诺冰箱上还研究了铜管表面温度降低的影响。发现卡诺制冷机的性能系数提高了约35％。

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