局部热源法在建筑节能现场检测中的应用

Application of local heat-source method to on-site detection for building energy efficiency

提出了采用局部常功率热源法现场检测墙体传热系数的方法。介绍了使用该方法进行传热系数稳态检测的理论依据,设计了实验测试系统。编制了三维稳态导热程序,模拟了多组不同边界条件下的墙体传热过程,并建立了用于墙体传热系数辨识的神经网络,辨识结果与理论值吻合较好。

Puts forward an on-site detection method—the local heat-source method with constant heat release rate for the heat transfer coefficient of walls.Presents the theoretical basis of steadily detecting the heat transfer coefficient using this method.Designs the experimental detection system.Generates a three-dimensional steady heat transfer program to simulate heat transfer processes of the wall in different boundary conditions,and establishes the artificial neural network（ANN） to identify the heat transfer coefficient.The identification results have a good accordance with the analysing results.