الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Liquefied Petroleum Gas (LPG) is a common fuel in several sectors. It is a mixture of variable content, but is primarily comprised of propane and butane. When stored in liquid form, it has an energy density that is comparable to that of the more common liquid transport fuels, and so has advantages over natural gas in some applications. Like natural gas, LPG combustion can also result in lower emissions of regulated pollutants and greenhouse gases than the most common liquid transport fuels.The theoretical literature on LPG’s is quite extensive while the empirical work is scarce.At this moment, there are just a handful of published empirical studies and the results are not unambiguous.This thesis illustrates a simple study for heat and mass transfer of LPG recovery unit in Alexandria Petroleum Company (APC). The study focused on the characteristics and performance of the heat exchanger which has tag number E315 because it is concerned with the inlet feed of the LPG recovery unit. Also we studied the effect of changing the feed mass flow rate and effect of changing inlet pressure on the effectiveness, Number of transfer unit, heating capacity and pressure DROP in shell side and tube side with the aid of ASPEN Hysys simulation software.The study was done for counter flow heat exchanger using NTU method.The results of simulation show that increasing the load of unit results in a reduction in the effectiveness and number of transfer unit of the heat exchanger.On the other hand, it increases the heating capacity of the heat exchanger and the pressure DROP in shell side and tube side.Also, it was noticed that, increasing inlet pressure increase effectiveness and NTU, but it has no effect on heating capacity and pressure drop. At high flow rate, increasing pressure is ineffective on any of these parameters.Overall, the LPG composition witnesses a constant trend as a result of changing the feed mass flow rate to the heat exchanger and inlet pressure