at many circumstances, in heat exchange processes several exchangers were used with different cost laws due to their pressure ratings, materials of construction and exchange3r types. in such circumstances traditional methods of pinch technology can not be led to minimum total annual cost may cause some other disadvantages like more complexity or higher maintenance. in this research work a new a...

This paper introduces a novel simultaneous optimization and heat integration approach, which can be used directly with the rigorous models in process simulators. In this approach, the overall process is optimized utilizing external derivative-free optimizers, which interact directly with the process simulation. The heat integration subproblem is formulated as an LP model and solved simultaneous...

This paper introduces a methodology for the heat integration of industrial batch processes. Based on Pinch Analysis principles, this methodology resorts to intermediate heat storage to prevent adverse effects on the operating flexibility. A systematic procedure, backed with a graphical representation, allows the determination of the minimum number of heat storage units and their range of feasib...

The continued high cost of energy has mandated that the Chemical Process Industries reduce operational and capital costs through process heat integration. However, the heat integration of process streams can lead to process structures that are difficult to operate and control. This paper addresses the control of heat exchanger networks and it shows the importance of dynamic simulations in the s...

A new synthesis methodology is developed to optimize process scheduling and direct heat integration schemes for multipurpose batch plants simultaneously. Firstly, the concept of associated task is introduced to describe the heat transfer requirements of production tasks and an improved State-Tasks-Network representation is adopted to capture all streams-streams, units-streams and units-units he...

The purpose of this paper is to discuss the role of heat pumps in total site heat integration. It will be shown how heat pumps can help de-bottleneck heat transfer so that maximum energy savings are attained. Non-linear targeting models to get maximum cost savings and optimum heat pumping temperature levels are presented. Finally, the paper describes optimal solutions with heat pumps that do no...

The heat-integrated distillation column to be addressed in this paper is a special distillation column that involves internal heat integration between the whole rectifying and the whole stripping sections. An overview of the research on this process is presented in this work. It covers from the thermodynamic development and evaluations to the practical design and operation investigations for th...