基于CTF系数法的混凝土空心砌块的动态传热计算

Dynamic Heat Transfer Calculation of Concrete Hollow Block by CTF Method

本文采用CTF系数法对混凝土空心砌块进行了动态传热计算。首先通过建立空心砌块的频域有限元模型来计算其理论频域热特性,并采用参数辨识的方法获取其传热s多项式函数。然后根据辨识得到的传热s多项式函数进一步求取空心砌块的CTF系数,最后直接计算出空心砌块的动态传热量。同时建立了空心砌块的CFD模型(作为参考模型),并对空心砌块进行了动态传热模拟计算。通过对比发现,CTF系数法计算的空心砌块的动态传热量与CFD模型的模拟结果非常吻合。本文采用的CTF系数法可以准确地计算空心砌块墙体的动态传热量,并且在计算时间和效率上优于CFD等数值方法。

The method of Conduction Transfer Function （CTF） was used to calculate the dynamic heat transfer of concrete hollow block. Firstly, the frequency-domain finite element model was developed to calculate its frequency domain thermal characteristics, and then the s-polynomial transfer function was obtained by using the parameter identification method. The CTF coefficient of the hollow block was derived from the identified s-polynomial transfer function. Thus, the dynamic heat transfer was calculated directly by using the CTF coefficient. The CFD model was also developed as a reference to its simulation of the dynamic heat transfer. The results show that the dynamic heat transfer of the hollow block calculated by the CTF method CTF method adopted in this paper is accurate to calculate than traditional numerical methods such as CFD in terms agreed with the simulation results of the CFD model. The the dynamic heat transfer of the hollow block, and better of calculation time and efficiency.