Design Of Energy Efficient Buildings For Hot Areas Of Ethiopia With Respect To Air Conditioning

This thesis is intended to identify the design improvements of buildings that can be madernfor the hot region of Ethiopia. A detail literature survey is done on design improvementsrnand those that can be most suitable and economical are suggested. A case study of tworndifferent buildings in Gode (one of the hottest area in Ethiopia) was conducted usingrnbuilding energy simulation software to quantify the energy saving from some of the designrnimprovement measures such as using insulation in roof or ceiling and in walls, windowrnglazing and shadings, and orientation. The simulation result verifies that using 75mmrninsulation in roof or ceilings give a better saving and most economical when the buildingrnhas small glazing area with respect to the wall size and lower internal cooling load. Andrnwhen the building has large glazing area using either internal or external window shading isrnthe best way to reduce the annual energy cost of the building and 50mm roof insulation isrnmost economical. In addition to the above results the relation between insulation andrndifferent conditions of cooling load in a building is verified. This result shows that whenrninternal load and solar load through window are dominating insulation can have a negativernimpact to cooling load.

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