Exergy analysis and modifications for fractionating and heat exchanging processes based on the quantitative energy level composite curve
A novel diagram-based representation approach is developed in this article to analyze the thermodynamic efficiency and identify quickly the promising energy-use modifications for fractionating and heat exchanging processes.An energy level composite curve is quantitatively constructed by using the converged simulation results and a stepwise procedure.Then the exergy calculation is performed to validate the performance of processes and to define the targets for improvements.Furthermore,the avoidable exergy destruction is also analyzed by applying the concepts of avoidable and unavoidable exergy destructions.An integrated system for fractionating and heat exchanging processes in a delayed coking unit is taken as a case study to demonstrate the effectiveness of the proposed method.The results obtained reveal that the heat exchanging between gas oil and deethanization gasoline is the most inefficient process with the highest modification potential,and the lowest exergy efficiency of component in the integration system is only 29.4%.
Energy level exergy analysis avoidable exergy destruction quantitative diagram energy integration
国际会议
桂林
英文
1-12
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）