Journal of Thermal Analysis and Calorimetry

, Volume 133, Issue 1, pp 329–335 | Cite as

Thermal conductivity of insulations approached from a new aspect



In the literature, several definitions can be found for the thermal conductivity; however, many of them are not clearly explained. The easiest explanation is the following: the property of a material to conduct heat. It is evaluated primarily in terms of Fourier’s Law for heat conduction. Nowadays, the examination of the thermal conductivity of building materials is very important both for the manufacturers and for the consumers. Nonetheless in real, confusing definitions and interpretations can be found regarding the exact meaning of the thermal conductivity of the materials. In physics and in engineering practice, the following appellations are used as heat conductivity, thermal conduction coefficient, design and declared values of the thermal conductivities as well as the effective thermal conductivity. In this article we would give an overview about the correct explanations of the above-mentioned values. At first thermal conductivity measurements of four different types of expanded polystyrene materials (EPS, 80, 100, 150, 200) will be presented by using Holometrix Lambda 2000 type Heat Flow Meter after drying them in a Venticell 111 type laboratory oven to changeless mass.


Heat transfer in building walls Thermal conductivity Insulation materials 



This paper was supported by the EFOP-3.6.1-16-2016-00022 “Debrecen Venture Catapult Program” project.


  1. 1.
    Pe´rez-Lombard L, Ortiz J, Pout CA. Review on buildings energy consumption information. Energy Build. 2008;40:394–8.CrossRefGoogle Scholar
  2. 2.
    Kalmár F, Kalmár T. Energy class, building structure and solar gains. J Harbin Inst Technol (New Ser). 2007;14:81–4.Google Scholar
  3. 3.
    Lakatos A, Kalmar F. Analysis of water sorption and thermal conductivity of expanded polystyrene insulation materials. Build Serv Eng Res Technol. 2013;34:4407–16.CrossRefGoogle Scholar
  4. 4.
    Lakatos A, Kalmar F. Investigation of thickness and density dependence of thermal conductivity of expanded polystyrene insulation materials. Mater Struct. 2013;46(7):1101–5.CrossRefGoogle Scholar
  5. 5.
    Jelle BP. Traditional, state-of-the-art and future thermal building insulation materials and solutions—properties, requirements and possibilities. Energy Build. 2011;43:2549–63.CrossRefGoogle Scholar
  6. 6.
    Muñoz DF, Anderson B, Cejudo-Lópeza JM, Carrillo-Andrés A. Uncertainty in the thermal conductivity of insulation materials. Energy Build. 2010;42(11):2159–68.CrossRefGoogle Scholar
  7. 7.
    Cha J, Seo J, Kim S. Building materials thermal conductivity measurement and correlation with heat flow meter, laser flash analysis and TCi. J Therm Anal Calorim. 2012;109:295–300.CrossRefGoogle Scholar
  8. 8.
    Fukushima H, Drzal LT, Rook BP, Rich MJ. Thermal conductivity of exfoliated graphite nanocomposites. J Therm Anal Calorim. 2006;85:235–8.CrossRefGoogle Scholar
  9. 9.
    Chen M, Wan S, Lingchao G, Zhao LP, Gong C. Effect of matrix components with low thermal conductivity and density on performances of cement-EPS/VM insulation mortar. J Therm Anal Calorim. 2016;126:1123–32.CrossRefGoogle Scholar
  10. 10.
    Wilinska I, Pacewska B. Calorimetric and thermal analysis studies on the influence of waste aluminosilicate catalyst on the hydration of fly ash–cement paste. J Therm Anal Calorim. 2014;16(2):689–97.CrossRefGoogle Scholar
  11. 11.
    Lakatos Á. Measurements of thermal properties of different building materials. Adv Mater Res. 2014;1016:733–7.CrossRefGoogle Scholar
  12. 12.
    Lakatos A, Csáky I, Kalmár F. Thermal conductivity measurements with different methods: a procedure for the estimation of the retardation time. Mater Struct. 2015;48(5):1343–53.CrossRefGoogle Scholar
  13. 13.
    Lakatos A. Measurement of the decrement factor of different wall structures. WSEAS Trans Heat Mass Transf. 2016;11:1–5.Google Scholar
  14. 14.
    Moga L, Moga I. Masonry thermal conductivity influence on thermal performance of a thermally insulate wall. J Appl Eng Sci. 2011;1143:51–8.Google Scholar
  15. 15.
    Shanshan C, Cremaschi L, Afshin JG. Pipe insulation thermal conductivity under dry and wet condensing conditions with moisture ingress: a critical review. HVAC&R Res. 2014;20:4.Google Scholar
  16. 16.
    Koru M. Determination of thermal conductivity of closed-cell insulation materials that depend on temperature and density. Arab J Sci Eng. 2016;41:4337–46.CrossRefGoogle Scholar
  17. 17.
    Moga L, Moga I. Heat loss coefficient influence on the energy performance of buildings, In: Indoor Air 2014—proceedings of the 13th international conference on indoor air quality and climate. (2014); ISBN 978-1-64339-731-5, pp 299–306.Google Scholar
  18. 18.
    Davraz M, Kilinçarslan S, Koru M, Tuzlak F. Investigation of relationships between ultrasonic pulse velocity and thermal conductivity coefficient in foam concretes. Acta Phys Pol A. 2016;130(1):469–70.CrossRefGoogle Scholar
  19. 19.
    Kirilovs E, Kukle S, Beļakova D, Borodiņecs A, Ruciņš Ā, Stramkale V. Thermal conductivity of hemp based boards. Tehnologija Resursi Environ Technol. 2015;1:61–6.Google Scholar
  20. 20.
    Schiavoni S, D’Alessandro F, Bianchi F, Asdrubali F. Insulation materials for the building sector: a review and comparative analysis. Renew Sustain Energy Rev. 2016;62:988–1011.CrossRefGoogle Scholar
  21. 21.
    Lakatos Á. Thermophysical investigations of nanotechnological insulation materials. AIP Conf Proc. 2017;1866:030003. doi: 10.1063/1.4994479.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  1. 1.Department of Building Services and Building Engineering, Faculty of EngineeringUniversity of DebrecenDebrecenHungary

Personalised recommendations