【摘要】 换热器的高效、准确动态模拟是热系统性能动态分析的关键，然而基于时、空离散的有限差分/体积法难以兼顾模拟计算的精度与速度，不利于热系统的动态性能分析。本文提出一种频域热系统动态模拟高效算法，通过傅里叶变换导出系统内换热器的频域控制方程，并将其分解为初始-扰动部分，分别解析和数值求解，叠加得到系统的动态响应。相比于有限差分法，本文所提出算法在保证精度(偏差<0.3 K)的同时可缩短计算时间约一个量级。更多还原

【Abstract】 Efficient and accurate dynamic simulation of heat exchangers is crucial for the dynamic analysis of thermal systems. However, conventional finite difference/volume methods based on-and spatial discretization struggle to balance the accuracy and speed of simulation, thus-the dynamic performance analysis of thermal systems. In this paper, we propose an efficient algorithm for dynamic simulation of thermal systems in the frequency domain. By utilizing Fourier transform, the frequency domain control equations of heat exchangers within the system are-and decomposed into initial-disturbance components, which are then analyzed and numerically solved separately before being superimposed to obtain the system’s dynamic response. Compared to finite difference methods, the proposed algorithm achieves a reduction in computation time by approximately one order of magnitude while ensuring accuracy(deviation < 0.3 K).更多还原