A study of optimum outside and inside design conditions for air conditioning of buildings in various regions in the Sudan.

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Date
2015-06-23
Authors
Mohamed Ali Mohd, Abdel Rahman
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Publisher
uofk
Abstract
This work is mainly intended to provide the air-conditioning engineer with more accurate data of outside design conditions for various regions in the Sudan. Chapter 1, the importance of air-conditioning and refrigeration is reviewed, the common methods of air-cooling are briefly described and the design conditions are defined. At the beginning of part 1, which is devoted to outside design conditions, chapter 2 deals with the climate of the Sudan. Here, the country is divided into five climatic zones and a short description of each of these zones is given by a table. In chapter 3, for a representative location in each of the five zones, the usual methods for determination of outside design conditions are applied. These are the British, the South African and the American methods. The values of outside design conditions as were obtained by these methods for the five climatic zones are given in tabular form. Also, a description of charts of frequency of simultaneous occurrence of dry bulb and the wet bulb temperatures is given together with a procedure for calculation of sol-air temperature. The values of sol-air temperature for wall orientations of north, south, east and west in Khartoum are given. Solar angles are given for the remaining locations. In this Chapter the frequency charts are used for choice of design conditions. In Chapter 4 examples of calculation are given using three different sets of design conditions to show the effect of proper choice of design conditions on the selected capacity of the machine and the design of the air conditioning system as a whole. At the end of part 1 some discussion of the results and conclusions are given. In part 2 the intention was to make a literature survey of thermal indices used for measurement of human comfort and the possibility of utilization of one or more of them in the Sudan. In Chapter 5 the factors affecting human comfort are discussed; the most important indices are given in Chapter 6 and in Chapter 7 two of these are applied to Khartoum area, with data obtained from the Department of Meteorology. Chapter 8 gives an experimental procedure and results of some tests conducted by the author at the Faculty of Engineering and Architecture, University of Khartoum. This part is ended with some conclusions. This work is meant to serve as a preliminary guide for the design of air conditioning and refrigeration systems in the Sudan.
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: A study of optimum outside and inside design conditions for air conditioning of buildings in various regions in the Sudan. This work is mainly intended to provide the air-conditioning engineer with more accurate data of outside design conditions for various regions in the Sudan. Chapter 1, the importance of air-conditioning and refrigeration is reviewed, the common methods of air-cooling are briefly described and the design conditions are defined. At the beginning of part 1, which is devoted to outside design conditions, chapter 2 deals with the climate of the Sudan. Here, the country is divided into five climatic zones and a short description of each of these zones is given by a table. In chapter 3, for a representative location in each of the five zones, the usual methods for determination of outside design conditions are applied. These are the British, the South African and the American methods. The values of outside design conditions as were obtained by these methods for the five climatic zones are given in tabular form. Also, a description of charts of frequency of simultaneous occurrence of dry bulb and the wet bulb temperatures is given together with a procedure for calculation of sol-air temperature. The values of sol-air temperature for wall orientations of north, south, east and west in Khartoum are given. Solar angles are given for the remaining locations. In this Chapter the frequency charts are used for choice of design conditions. In Chapter 4 examples of calculation are given using three different sets of design conditions to show the effect of proper choice of design conditions on the selected capacity of the machine and the design of the air conditioning system as a whole. At the end of part 1 some discussion of the results and conclusions are given. In part 2 the intention was to make a literature survey of thermal indices used for measurement of human comfort and the possibility of utilization of one or more of them in the Sudan. In Chapter 5 the factors affecting human comfort are discussed; the most important indices are given in Chapter 6 and in Chapter 7 two of these are applied to Khartoum area, with data obtained from the Department of Meteorology. Chapter 8 gives an experimental procedure and results of some tests conducted by the author at the Faculty of Engineering and Architecture, University of Khartoum. This part is ended with some conclusions. This work is meant to serve as a preliminary guide for the design of air conditioning and refrigeration systems in the Sudan.
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