Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33465
Title: An improvement to frequency-domain regression method for calculating conduction transfer functions of building walls
Authors: Xu, X
Wang, S 
Chen, Y
Keywords: CTF coefficients
FDR method
Frequency characteristics
Improvement
Issue Date: 2008
Publisher: Pergamon Press
Source: Applied thermal engineering, 2008, v. 28, no. 7, p. 661-667 How to cite?
Journal: Applied thermal engineering 
Abstract: An improvement is proposed for the frequency-domain regression (FDR) method to calculate CTF (conduction transfer function) coefficients of multilayer constructions. This improvement aims at providing complete CTF coefficients with a unique set of d values. In the improvement, the external and internal polynomial s-transfer functions of heat conduction of a wall are identified based on equivalent frequency response characteristics by constraining their denominators equal to that of the cross polynomial s-transfer function while this cross polynomial s-transfer function of this wall is identified using FDR method in advance. The complete CTF coefficients of this wall (i.e., external CTF values a, cross CTF values b, internal CTF values c and a unique set of heat flow rate history coefficients d) can be easily calculated from these identified polynomial s-transfer functions. Examples and comparisons show that this improvement of the frequency-domain regression method works well.
URI: http://hdl.handle.net/10397/33465
ISSN: 1359-4311
EISSN: 1873-5606
DOI: 10.1016/j.applthermaleng.2007.06.008
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