TY - JOUR ID - TI - Effect of Using Local Insulation Materials on the Indoor Temperature of Residential Buildings at Iraq AU - Nassr F. Hussein AU - Haqi I. Qatta AU - Abdulrahman S. Mahmood Haqi I. Qatta PY - 2019 VL - 37 IS - 2 Part (A) Engineering SP - 37 EP - 45 JO - Engineering and Technology Journal مجلة الهندسة والتكنولوجيا SN - 16816900 24120758 AB - Abstract- In this research, a thermal insulation between the two layersof a wall has been used for the residence buildings to reduce the heattransmitted across the walls and thus reducing the power consumptionfor cooling load. A MATLAB program was used to obtain the thermalresponse for various types of walls from the energy sources (solarradiation and ambient temperature) in summer season in Baghdad, Iraq.Local materials used in this study as thermal insulators between the twolayers of walls are: local cane mat, wood sawdust and cork grains.Modeling tests were carried out on June, July and August via usingMatlab program. The simulation results obtained have been comparedfor five different types of walls are: usual wall, thick wall, wallcontaining local cane mat, wall containing wood sawdust and wallcontaining cork grains, which helps in finding the heat flow across thewall where boundary conditions varied according to solar radiation andenvironment thermal load. The results showed that using the wallscontaining of local cane mat, wood sawdust and cork grains can reducethe heat gain by 50%, 44% and 40% respectively, compared with usualwall and thus reduce the power consumption

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