CAJ | 학술논문

建立了一套实验装置研究相变过程中的体积变化规律及其影响因素.以正十六烷为相变材料,在不同的初始温度和边界温度下,对凝同过程和熔解过程的体积变化率进行测量分析.研究表明:在相变初始阶段,体积变化速率较大.体积变化速率的大小与相变速率的大小有关,所有影响相变速率的因素将影响体积变化速率.在压力的作用下,熔解过程的总体积变化率小于凝固过程的总体积变化率.对同体积的液态正十六烷,在相同的外界压力下,较小的体积膨胀率可获得较大的输出功率.
건립료일투실험장치연구상변과정중적체적변화규률급기영향인소.이정십륙완위상변재료,재불동적초시온도화변계온도하,대응동과정화용해과정적체적변화솔진행측량분석.연구표명:재상변초시계단,체적변화속솔교대.체적변화속솔적대소여상변속솔적대소유관,소유영향상변속솔적인소장영향체적변화속솔.재압력적작용하,용해과정적총체적변화솔소우응고과정적총체적변화솔.대동체적적액태정십륙완,재상동적외계압력하,교소적체적팽창솔가획득교대적수출공솔.
An experimental device to research the volumetric change rate during phase transition process and the influenc-ing factors was constructed. Hexadecane was chosen as the phase change material. Volumetric change rate of hexadecane was measured and analyzed during solidification and melting process at different initial and boundary temperatures. The result showed that the speed of volume change is large at the initial stage of phase change process, the volumetric change rate is related to phase change rate. All that affect the phase change rate will affect the volumetric change rate. The total volumetric change rate of melting process is smaller than solidification process under external pressure. Hexadecane with same volume can output more power at less volumetric expansion rate under same external pressure.