Transient natural convection heat transfer of liquid D-mannitol on a horizontal cylinder
Transient natural convection heat transfer of liquid D-mannitol on a horizontal cylinder
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DOI：
10.1016/j.renene.2016.07.076
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发表时间：
2016-12
期刊：
影响因子：
8.7
通讯作者：
M. Shibahara;Qiusheng Liu;K. Fukuda
中科院分区：
文献类型：
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作者：
M. Shibahara;Qiusheng Liu;K. Fukuda
对D-甘露醇在水平圆柱体上的瞬态和稳态自然对流换热进行了实验研究。为了阐明D-甘露醇的自然对流现象，在不同的液体温度和不同的产热率周期下，测量了水平铂柱中D-甘露醇的瞬态和稳态传热系数。在该实验中，使用直径为1 mm且长度为43.5mm的铂圆柱体作为测试加热器。实验结果表明，D-甘露醇的稳态传热系数受液体温度的影响。随着液体温度的升高，可以理解，液体温度的影响减弱。当生热速率周期变化时，传热过程分为自然对流传热和传导传热。研究认为，随着产热率周期的减小，导热占主导地位。得到了D-甘露醇稳态和瞬态传热系数的经验关联式。
Transient and steady state natural convection heat transfer for D-mannitol on a horizontal cylinder was investigated experimentally at various liquid temperatures and heat input conditions. To clarify the natural convection phenomena of D-mannitol, transient and steady heat transfer coefficients were measured under various liquid temperatures of D-mannitol and periods of heat generation rates from a horizontal platinum cylinder. The platinum cylinder with a diameter of 1 mm and a length of 43.5 mm was used as the test heater in this experiment. Experimental results indicated that the steady heat transfer coefficient of D-mannitol was affected by the liquid temperature. As the liquid temperature increased, it was understood that the effect of liquid temperature weakened. When the period of the heat generation rate was changed, the heat transfer process was divided into natural convection heat transfer and conductive heat transfer. It was considered that the conductive heat transfer was more dominant as the period of the heat generation rate decreased. The empirical correlations of steady and transient heat transfer coefficients for D-mannitol were obtained.