Thermal simulation for unconditioned single zoon with modified roof

Abstract EN

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.