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Thickness optimization of polyurethane floor insulation based on analysis of the heat transfer in a multi-layer

Moosavi, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1115/ESDA2014-20441
  3. Abstract:
  4. During the year, due to weather conditions, the temperature fluctuations at surface level cause problems in underground pipes as a result of freezing water. One of the best prevention strategies is the use of polyurethane floor insulation for keeping the temperature of clay above zero degrees Celsius. In this study to calculate the minimum thickness of polyurethane insulation layer, the differential equation of energy is solved based on principle of separation of variables using imaginary eigenvalues for consistency with the temperature distribution in multi-layer consist of asphalt, gravel and polyurethane with finite thickness and clay as a semiinfinite medium with periodic thermal boundary conditions at surface level. Numerical approach is performed in Matlab and the results show that by using a thin layer of polyurethane it's possible to greatly reduce the insertion depth of water pipes
  5. Keywords:
  6. Floor insulation ; Periodic thermal boundary conditions ; Boundary conditions ; Eigenvalues and eigenfunctions ; Floors ; Heat transfer ; Temperature distribution ; Thermal insulation ; Water pipelines ; Numerical approaches ; Polyurethane insulation ; Prevention strategies ; Semi-infinite medium ; Separation of variables ; Temperature fluctuation ; Thermal boundary conditions ; Thickness optimization ; Polyurethanes
  7. Source: ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis, ESDA 2014 ; Vol. 3, issue , 2014
  8. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1920139