Experimental and Theoretical Study to Minimize the Cooling Load by Using a New Alternatives in a Space located in Baghdad City

Abstract

The present investigation is concerned with the alternatives used for the cooling load reduction of a space in Baghdad. A numerical and experimental study has been accomplished in Baghdad during July and August of 2008 with the application of a new technique by a suitable alternative for minimizing the cooling load. In the experimental side of this work, a vertical aluminum flat plate is situated on the eastern and southern walls. This sheet is extended into the under ground to a depth of (1) m of a cube test room having (1) m3 size. The experimental data showed that the indoor temperature reduced from (34.5) °C to (31.7) °C and (29.9) °C when using aluminum plate with air gap and glass wool insulation respectively. The heat flux on the southern wall reduced by (23.5%) and (33.7%) for air gap and glass wool respectively. The corresponding reductions on the eastern wall were (20%) and (29.8%) for air gap and glass wool respectively. A numerical simulation two-dimensional model was performed applying a finite difference technique implemented in a sophisticated MATLAB program. The results of thermal simulations have revealed that the system can significantly reduce the building cooling load when the suggested alternatives have been applied. Finally, it was found that the numerical model was in a good agreement with the experimental data with a maximum discrepancy of (5 %) for the heat flux at the exposed walls.