Determination of Outdoor Conditions for Air-Conditioning System Design In Sudan (Khartoum Case Study)

Abstract

The main objective of this research is to set up out-door climatic conditions upon which the air-conditioning cooling load calculation, and the air-conditioning equipment selection are based to obtain an efficient and economical design . These values have been established by statistical analysis of ten consecutive years of dry and wet-bulb temperatures hourly observations collected by Meteorological Department . Three frequency levels of percentiles .4 , 1 and 2% for DBT with mean coincident WBT ,and WBT with mean coincident DBT has been established .The decision of selecting one of these frequency levels is referred to the design engineer. The DBT which represents the ambient temperature upon which the aircooled condenser capacity is based has been established . The WBT that represents the ambient WBT upon which the cooling tower and evaporative condenser capacity is based is also established