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Using the renormalization method for heat exchanger calculation and optimizationстатья Исследовательская статья Электронная публикация
- Автор: Gennadii Gembarzhevskii
- Сборник: Proceedings of 7th World Congress on Structural and Multidisciplinary Optimization
- Год издания: 2007
- Место издания: Seoul, Korea
- Первая страница: 2301
- Последняя страница: 2309
- Аннотация: There is a bottleneck in the heat exchange that forms the basic idea of the recuperative gas-liquid exchanger. This is a heat transfer in gas. This is why it seams reasonable to design such an exchanger using the renormalization procedure. In the case of laminar boundary layer flows the universal relation for Nusselt number may be expected from general arguments. Consequently, the one-parametric (in addition to Prandtl number) analytic form of Nusselt number for fluid forced convection on an arbitrary surface was obtained (in the case of arbitrary hydrodynamic regime of flow but for initial thermal flow domain). The efficiency was chosen as a heat exchanger running criterion. That is a ratio of the gas temperature drop on the exchanger to the difference of the gas and liquid temperature at theirs entrances to the exchanger. This exchanger efficiency may be expressed in terms of the flow Nusselt number plus the Peclet number and geometrical characteristics of the channel. Consequently, the compact but general analytical form for estimation of the exchanger efficiency was derived. To account for effects of the secondary importance processes (such as finite heat resistance of the rigid boundary surface and heat processes in the liquid coolant), the efficiency form obtained was renormalized by means of two algebraic transformations. The efficiency of the renormalization method is demonstrated in the selection problem of heat exchanger optimal construction for gas fast-flow closed-loop unit. The solution of the problem is sought in the exchanger construction class of "chess-arranged" pipe cluster. It was found a step-by-step routine that enables a practically full-analytical process of solving this problem. The optimal configuration of the exchanger pipe cluster as a function of the tube fitting geometry was found. Keywords: Heat exchanger, renormalization method, optimization
- Добавил в систему: Гембаржевский Геннадий Владимирович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Статья в трудах WCSMO-7 Seoul-2007 | A0151.pdf | 825,2 КБ | 30 января 2020 [Gembarzhevskii] |