Optimal Design For Spiral-Plate Heat Exchanger And Thermomechanical Analysis

To solve the problem of today’s world energy crisis, energy conservation is becoming a more and more important topic, heat exchanger occupies an important place in the field of energy conservation, however, because of the heat exchanger is one of the most widely used equipment in the traditional energy-intensive heavy industry, it as the mainly equipment in the process of preheating, waste heat recovery, refrigeration, made outstanding contributions to energy saving.Spiral plate heat exchanger is widely used in the fields of industrial, civil, pharmaceutical and so on, due to the traditional design method with the aid of experience, the study of its theory is not enough widely and deeply, so it’s often cannot meet the practical needs and replaced by other types of heat exchangers.With the development of computer technology, all kinds of optimization algorithm and the techniques of computational fluid dynamics is developed, provides feasibility for the further study of heat exchanger.Based on the spiral plate heat exchanger as the research object, this paper select the established model, through the analysis of the existing heat transfer reinforcement theory, combined with the classical genetic algorithm to programming optimization of spiral plate heat exchanger, iterative calculation to obtain the optimal structural parameters of spiral plate heat exchanger.On this basis, with the entransy dissipation theory as the foundation, puts forward a new physical quantities of entransy, and established a new heat exchanger performance evaluation standard of total cost of unit heat transfer model, and use it as the objective function, analyzes the relationship between the structural parameters in the spiral plate heat exchanger (cold and hot fluid velocity, plate spacing) and it.Because the total cost of unit heat transfer not only consider the thermodynamic performance of heat exchanger but also considered the economic feasibility.Finally combining with Fluent simulate the performance of the heat exchanger before and after optimization, further analyzes the internal flows, the research of this paper provides a theoretical basis for the design, the structure optimization and performance prediction of the spiral plate heat exchanger.