Fundamental Study for the Solution of Thermoacoustic Phenomenon Using Numerical Calculation: Relationship between the Stack Installation Position and Heat Flow
Fundamental Study for the Solution of Thermoacoustic Phenomenon Using Numerical Calculation: Relationship between the Stack Installation Position and Heat Flow
复制标题
数值计算求解热声现象的基础研究：电堆安装位置与热流的关系
DOI：
10.1143/jjap.51.07ge01
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Yoshiaki Watanabe
中科院分区：
文献类型：
--
作者：
Kentaro Kuroda;S. Sakamoto;K. Shibata;Y. Nakano;T. Tsuchiya;Yoshiaki Watanabe
热声系统具有几个优点，因为它们的结构简单，由余热和太阳能等热能驱动。然而，由于它们的能量转换效率较低，还没有被开发出来用于实际应用。因此，为了提高能量转换效率，本文采用数值计算的方法对系统设计开发方法进行了研究。首先，将传递矩阵法的计算结果与实验结果进行了比较，两者吻合较好。其次，对电堆中各热流元件的计算结果表明，与温度梯度Qd成正比的热流是导致系统性能下降的主要因素。最后，改变电堆的安装位置，以降低QD在热流中所占的比例。结果表明，通过将烟囱安装位置移动到更靠近管子中心的位置，所获得的比率降低。能量转换效率提高了8倍。
Thermoacoustic systems have several advantages owing to their simple structure driven by heat energy such as waste heat and solar heat. However, because their energy conversion efficiency is low, they have not been developed for practical use. Therefore, to improve energy conversion efficiency, a method of system design development is examined in this report using numerical calculations. First, calculation results obtained using the transfer-matrix methods are compared with experimentally obtained results, which confirms their good agreement. Secondly, calculated results of each heat flow element in the stack show that heat flow proportional to the temperature gradient QD, which decreases the performance of the system, is dominant. Finally, the installation position of the stack is changed to reduce the ratio that QD occupies in the heat flow. Results show a decrease in the ratio obtained by moving the stack installation position closer to the center of the tube. Energy conversion efficiency was increased eight times.