实验结果表明，自然循环工况下上升加热段内工质的物性变化及由浮升力引起的自由流动对对流传热特性有重要影响。
The experimental results indicate that free convection caused by the buoyancy in the heated tube with natural circulation has great influence on the heat transfer characteristics.
以常压去离子水为工质，对自然循环工况下上升加热段内单相水的摩擦阻力及对流传热特性进行了实验研究。
The friction and convective heat transfer of single phase water flow in a vertical heated tube at natural circulation condition were experimentally investigated.
以常压去离子水为工质，对自然循环工况下上升加热段内单相水的摩擦阻力及对流传热特性进行了实验研究。
The investigation on heat transfer of single phase liquid flow in a tube with natural circulation is performed.
工作段电流大，铜线温度高(550度左右)，如果工作段内有空气存在，铜和氧气在加热的条件下就产生氧化铜。
Work period of current is big, copper wire high temperature (550 degrees), if the working section has air exist, copper and oxygen in heating conditions produce copper oxide.
本设备采用多组盘管加热，随着罐内液料的不段减少，可以从上而下逐步的关闭盘管加热。
This equipment is heated by several coils and with the decrease of the liquid material, we can close the coil gradually.
本设备采用多组盘管加热，随着罐内液料的不段减少，可以从上而下逐步的关闭盘管加热。
This equipment is heated by several coils and with the decrease of the liquid material, we can close the coil gradually.
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