Establishes a dynamic lumped parameter model for air cooled heat pump under frosting condition. Divides frosting course into accumulation of density and frost thickness.
建立了结霜工况下空气源热泵集中动态参数模型，将结霜过程分解成密度项的累计和霜层厚度项的累计。
The system model comprises the dynamic heat exchanger model based on the lumped parameter method and moving phase boundary method, and the stable flow models of compressor and expansion valve.
系统模型中包含了用集总参数和相移动边界法建立的热交换器动态模型，以及压缩机和膨胀阀的稳态流动模型。
A dynamic heat transfer model based on the lumped parameter method was developed for cooling system of vehicle internal combustion engine.
提出了一个基于集总参数法的车用内燃机冷却系统动态传热模型。
A new fast solution method for lumped parameter dynamic model is put forward, and is applied to lumped parameter dynamic model for single-phase temperature in boiler.
该文提出了一种用于动态过程集总参数模型的新的快速求解法，并将其应用于锅炉中单相工质汽温动态过程的集总参数模型。
The general lumped parameter model introduced in this paper offers more accurate results than the traditional method for dynamic stiffness matrix of foundation is frequency-dependent.
由于基础动力阻抗矩阵是外荷载激励频率的函数，采用更多参数的一般集中参数模型与数值解答吻合精度更高。
It is expected that the general lumped-parameter model will improve the dynamic foundation design.
计算结果表明，论文提出的一般集中参数模型有望改进基础动力响应分析。
Based on fast solution and its methods for single phase medium, a fast solution method for lumped parameter dynamic model of two-phase medium is put forward.
在快速求解法和单相工质快速求解法的基础上，提出了两相工质动态过程求解的快速求解法。
Based on fast solution and its methods for single phase medium, a fast solution method for lumped parameter dynamic model of two-phase medium is put forward.
在快速求解法和单相工质快速求解法的基础上，提出了两相工质动态过程求解的快速求解法。
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