Abstract
Due to the complex geometry of plate heat exchangers and thus a large number of variables affecting the performance of the exchangers, the design of these types of exchangers is quiet difficult. However, unlike the shell and tube heat exchangers which contain available data of design procedures, the design of plate heat exchanger is a monopoly of some certain manufacturing companies that make the problem even worse. In this paper, the objective is to minimize the number of plates in plate heat exchanger; in order to achieve that, a simple and yet efficient mathematical model is introduced for determination of the pressure drop and heat capacity of a plate heat exchanger in single- and multipass state and also a program was defined for determination of optimal solution based on this simple mathematical model for given operational constraints and plate type. In the end, the optimal solution will be compared to the answer of CAS200 commercial software and also it is shown that the effect of the start and end plates and transverse distribution in optimal solution is considerable.
Highlights
The increase in global consumption, on one hand, and enactment and enforcement of strict environmental laws, as well as the development of other industrial countries, on the other hand, has led energy costs to rise
Shell and tube heat exchangers have been used for many years, but, in the past decade, the demand for plate heat exchanger (PHE) has increased
The objective of the present paper is to develop a new algorithm based on a mathematical model to minimize the number of plates in PHEs based on specific inputs such as maximum pressure drop and required heat transfer, at times it is required to optimize fluid flow and/or heat transfer in which entropy generation minimization (EGM) method is used to find optimum fluid flow and/or heat transfer characteristics
Summary
The increase in global consumption, on one hand, and enactment and enforcement of strict environmental laws, as well as the development of other industrial countries, on the other hand, has led energy costs to rise. One of the most important strategies for saving energy is to create productive closed-cycle with nonpolluting products, while making optimum use of heat generated in a process; this requires efficient and economical manufacturing of heat exchanger. Manufacturing a fine product requires optimization of the production process, heat, and energy. Heat exchangers are widely used in food and pharmaceutical and chemical industries, so selecting an appropriate heat exchanger is one of the major concerns of today’s engineering industry. These heat exchangers must be able to meet the needs of the process and do not impose too much investment and operating and maintenance costs. Shell and tube heat exchangers have been used for many years, but, in the past decade, the demand for plate heat exchanger (PHE) has increased
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