Identification of Building Envelope Overall Coefficient of Heat Transfer Using Recursive Least Squares Algorithm

Abstract:

This paper introduces the methodology and procedures of identification of overall coefficient of heat transfer (U-factor) of building envelopes using recursive least squares algorithm and dynamic heat transfer data. Application this method to three types of typical to examine the correctness and feasibility of this method. The following conclusions can be obtained: 1) Identification of U-factor of building envelopes using recursive least squares algorithm is feasible for engineering purpose, the identified U-factor can be near to its real value; 2)The testing periods can be much shorter than the steady testing; 3)The identification error is associated with the thermal inertia. The error is larger as the thermal inertia of building envelope is large within the same testing circumstances.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 3239-3244
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.3239
• Online since: May 2011
• Authors: Guo Qing Yu, Gang Feng Gao, Xin Feng Lin
• Keywords: Building Envelope, Identification, Overall Coefficient of Heat Transfer, Recursive Least Squares Algorithm

References

[1] F.S. Tian, Y.H. Yang, Y. Meng, Application of heat transfer coefficient for Building Field Detection, Journal of New Building Materials, 59-61, 2004 (In Chinese).

[2] J. Wu, Z.Y. Zhao, Y.N. Li, Heat flow meter in the construction of energy-saving in-situ detection, Building Energy Conservation, 73-75, 2008 (In Chinese).

[3] H.W. Fan, D.Q. Xing, J.L. Wang, Field detection technology of building envelope heat transfer coefficient, Shanghai Measurement and Testing, 13-15, 2005 (In Chinese).

[4] F.H. Wang, J.B. Yao, D.Y. Wang, Study on existing on-site detection of building envelope heat transfer coefficient, Building Energy & Environment, 60-64, 2008 (In Chinese).

[5] Jayamaha S E G, Wijeysundera N E and Chou S K, Effect of rain on the heat gain through building walls in tropical climates, Building and Environment, 465-477, 1997.

DOI: 10.1016/s0360-1323(97)00005-x

[6] Chow WK and Chan KT, Overall thermal transfer values for building envelopes in Hong Kong, Applied Energy, 289-312, 1992.

DOI: 10.1016/0306-2619(92)90018-7

[7] P.B. Li, D.W.Hu, System Identification Basis, China Water Power Press in Beijing, 2006 (In Chinese).

[8] P. He, G. Sun. Heat Supply Engineering. China Architecture & Building Press in Beijing, 2009 (In Chinese).