الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Refrigeration systems have been used by human being for decades, either for goods storage or for human comfort, which in other way named HVAC systems. HVAC systems have spread in various sizes and technologies. They can be as simple as window and split type, or can be as complicated as chilled water system. District cooling systems have seen an increasing concern in the recent years, either for environmental or financial benefits. Starting from making use of renewable energy, emissions control, and ending with reaching a better level of efficiency and maintenance operations District cooling system consists of three primary components: the central plant, the distribution network, and energy transfer station. In the central plant, chilled water is produced by absorption chillers, compression chillers or both. The choice of refrigeration method and equipment will be driven by many factors, including cost of fuels, electric system capacity, electricity cost and availability of water. The second component is the distribution network that conveys the chilled water to the buildings served. Because its high initial cost, it is important to maximize the use of the distribution piping network. The third component is the consumer interconnection, which includes in-building equipment. Chilled water may be used directly by the building systems or isolated indirectly by a heat exchanger. A case study is introduced in this report about the DCS of New El-Alamein city starting from cooling load estimation, using hybrid system, etc. and ending with illustrating the environmental benefits and financial analysis of the project. On the other hand, an analysis of the normal chilled water system is represented to clarify the difference between the two systems and ensure that the DCS will be better the normal system. As a conclusion, the DCS will reduce GHG emissions by 30-50% besides reduce power demand by 52MW. Finally, an innovative techniques for the DCS was introduced that could enhance the system in the future. These techniques could be using renewable energy as solar energy. In the section of TES, a substance that absorb and release heat energy as their phase changes known as PCM could be used. Also, from the models that are under research in making use of the cold energy released from the liquification of the natural gas, which will help to improve the efficiency of the DC S and reduce its overall capacity and capital cost.