The aim of this project was to design
an experiment for the Armfield Heat Exchanger, which will be implemented
in the Chemical Engineering Systems lab.
Energy conservation is important in process design. In industrial experience, the calculation of the minimum heating and cooling requirements reveal significant energy savings. Specifically, Imperial Chemical Industries in the United Kingdom and Union Carbide in the United States have both stated the results of numerous case studies that indicate 30% to 50% energy savings compared to traditional practice. Therefore, energy integration design procedure is a very beneficial tool and is an important phase indetermining the cost of preliminary design.
The first step in the energy integration analysis is the calculation of the minimum heating and cooling requirements for a heat-exchanger network. In any process flow sheet, there are several streams that need to be heated and there are some that need to be cooled. In the acetic anhydride production, for example, the reaction stream in the second reactor must be cooled, while the liquid product coming out of the same reactor must be heated for distillation. For that reason, cooling water is needed to lower the temperature of the reactor stream, and steam is needed for heating in the distillation column.
There are two laws for heat integration analysis. The first law states that the difference between the heat available in the hot streams and the heat required for the cold streams is the net amount of heat that must be removed or supplied. Consider this example. Suppose there are 6 streams given, three that need to be heated and the other three need to be cooled.
The first step in the energy integration analysis is the calculation of the minimum heating and cooling requirements for a heat-exchanger network. In any process flow sheet, there are several streams that need to be heated and there are some that need to be cooled. In the acetic anhydride production, for example, the reaction stream in the second reactor must be cooled, while the liquid product coming out of the same reactor must be heated for distillation. For that reason, cooling water is needed to lower the temperature of the reactor stream, and steam is needed for heating in the distillation column.
There are two laws for heat integration analysis. The first law states that the difference between the heat available in the hot streams and the heat required for the cold streams is the net amount of heat that must be removed or supplied. Consider this example. Suppose there are 6 streams given, three that need to be heated and the other three need to be cooled.
Authors
Christine Oloruntola
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