Thermal Simulation for Unconditioned Single Zoon with Modified Roof

  • Mohammed Ali Nasser Ali Middle Technical University
  • Abdul Hadi Nema Khalif Middle Technical University
  • Doaa Alaa Lafta Middle Technical University
Keywords: wood ash, Alabaster aggregates, plastic layers


Roof in the Iraqi houses normally flattening by a concrete panel. This concrete panel has poor thermal properties. The usage of materials with low thermal conductivity and high specific heat gives a good improvements to the thermal properties of the concrete panel, thus, the indoor room temperature improves. A Mathcad program based on a mathematical model employing complex Fourier series built for a single room building. The model input data are the ambient temperature, solar radiation, and sol-air temperature, which have been treated as a periodic function of time. While, the room construction is constant due to their materials made of it, except the roof properties are taken as a variable generated practically from the improved mixing ratios.The result showed that using concrete panel with components (cement, sand, coarse aggregate, wood ash and Alabaster aggregates) with a ratio (1:1:2:1:1) and 3-plastic layer denoted by roof No.4, gives the best improvement of the thermal performance for the building. Where, the thermal conductivity is reduced by 42% and the specific heat increased by 41.2% compared to the traditional concrete panel mixing ratio denoted by roof No.1. Also, the mechanical properties are agreed with the Iraqi standards No. 1107 on 2002.



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How to Cite
Ali, M., Khalif, A. H. and Lafta, D. (2019) “Thermal Simulation for Unconditioned Single Zoon with Modified Roof”, Journal of Engineering, 25(2), pp. 18-37. doi: 10.31026/j.eng.2019.02.02.