Fundamental Parameters of Heat and Moisture Transfer for Energy Efficiency in Buildings

Abstract:

Heat and moisture transfer in a room is critical for the indoor comfort.This first chapter introduces the basic concepts of heat and moisture transfer in buildings, dealing with the main theoretic fundamentals.It focuses on the most common parameters, used to analyze heat and moisture transfer in buildings.Furthermore this section takes into account a numerical model to calculate the simultaneous heat and moisture transfer in building materials.It is demonstrated that both the microstructure and physical parameters, e.g. density and porosity, may influence greatly the hygrothermal behaviour of the building materials. This is the reason why this chapter also gives prominence to the porous materials.

• Periodical: Key Engineering Materials (Volume 632)
• Pages: 79-93
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.632.79
• Online since: November 2014
• Authors: Stefania Liuzzi, P. Stefanizzi
• Keywords: Buffering Performance, Hygrothermal Behaviour, Indoor Comfort, Moisture Control, Numerical Model, Porosity

References

[1] H.M. Künzel 2010, Hygrothermal behaviour and simulation in buildings (chapter in Materials for energy efficiency and thermal comfort in buildings, Hall, 2010).

DOI: 10.1533/9781845699277.1.54

[2] M.R. Hall, (edited by) Materials for energy efficiency and thermal comfort in buildings. Woodhead publishing limited, Oxford, (2010).

[3] Z. Pavlík, E. Vejmelková, L. Fiala., R. Černý 2009, Effect of moisture on thermal conductivity of lime-based composites, Int. J. Thermophysic, Vol. 30, 1999–(2014).

DOI: 10.1007/s10765-009-0650-y

[4] H. M Künzel, Simultaneous heat and moisture transport in building components. Dissertation. University of Stuttgart, Stuttgart, (1995).

[5] UNI EN ISO 15148, 2003, Hygrothermal performance of building materials and products - Determination of water absorption coefficient by partial immersion.

DOI: 10.3403/02801954u

[6] M. R Hall M., D. Allison, a), Analysis of the hygrothermal functional properties of stabilised rammed earth materials. Building and Environment, Vol. 44, pp.1935-1942, (2009).

DOI: 10.1016/j.buildenv.2009.01.007

[7] K. Kießl, Kapillarer und dampfforminger Feuchtetransport in mehrschichtigen Bauteilen – Rechnerische Erfassung und bauphysikaliske Anwendung. Dissertation, University of Essen, (1983).

[8] X. Aimin X., Vapour Sorption Theories. Seminarieuppgift till doktorandk. urs Transportprocesser i Byggnadsmaterial, Chalmers University of Technology, Goteborg, Sweden, (1991).

[9] NORDTEST Report, Moisture Buffering of Building Materials, Nordic Innovation Centre, (2005).

[10] T. Padfield, The role of absorbent building materials in moderating changes of relative humidity. PhD Thesis. The Technical University of Denmark, Department of Structural Engineering and Materials, (1999).

[11] C. Rode, K. Grau, Moisture buffering and its consequence in whole building hygrothermal modelling. Journal of Building Physics. Vol. 31, pp.333-360, (2008).

DOI: 10.1177/1744259108088960

[12] L. Pel, Moisture transport in porous building materials, Ph.D. thesis, Eindhoven University of Technology, the Netherlands, (1995).