School of Nuclear Science and Technology, University of Science and Technology of China, No.96, JinZhai Road, Baohe District, Hefei, China; China Ship Development and Design Center, No.268, Zhangzhidong Road, Wuchang District, Wuhan, China.
School of Nuclear Science and Technology, University of Science and Technology of China, No.96, JinZhai Road, Baohe District, Hefei, China.
J Environ Manage. 2019 May 1;237:264-271. doi: 10.1016/j.jenvman.2019.02.095. Epub 2019 Feb 22.
The experimental study for the melting processes of phase change material (paraffin) inside a cylindrical container under different boundary conditions of the cylindrical outside surface was carried out. In the experiments paraffin was heated by the heating rod installed in the center of the cylindrical container. The interpolation method was employed to calculate phase front and liquid fraction during the melting process by the reading of the thermocouples in an array arrangement. Paraffin near the heating rod firstly melted due to heat conduction in the initial melting stage, and then the generation and intensification of natural convection led to the acceleration of phase changes, resulting in obvious temperature stratifications in the upper region of the cylinder container. Moreover, flat temperature phenomena are described and discussed in detail. The effect of different heating powers, boundary conditions and the temperatures of water bath on melting rates is evaluated as well.
开展了在圆柱形容器内的相变材料（石蜡）在不同圆柱形外表面边界条件下的熔化过程的实验研究。在实验中，通过安装在圆柱形容器中心的加热棒加热石蜡。通过数组热电偶的读数，采用插值法计算熔化过程中的相前沿和液相分数。在初始熔化阶段，由于热传导，靠近加热棒的石蜡首先熔化，然后自然对流的产生和加强导致相变加速，导致圆柱形容器的上区域出现明显的温度分层。此外，还详细描述和讨论了平坦温度现象。评估了不同加热功率、边界条件和水浴温度对熔化速率的影响。
