碩士 / 國立臺南大學 / 機電系統工程研究所碩士班 / 99 / The purpose of this study is to solve the overheated problem in the operation of the hyperbaric oxygen chamber. The process of operation during compression in the hyperbaric oxygen chamber, and with interior after the addition of heat generated the cabin after the internal overheating problem. This study optimizes these to achieve the optimal performance. In order to achieve better cooling methods, we proposed two methods of effectively cooling system, this method also reduces high temperature problems of the hyperbaric oxygen chamber. in this simulation shows the different types of cooling the body shape and the pressure of chamber caused the temperature distribution. And these simulation results show that the aim of this study is to develop an optimal numerical method on the design of the cooling system. The approach is to integrate the computer-aided analysis and optimization method, and then apply this approach to design and optimize the cooling system of the chamber. The design purpose is to enhance the performance of the oxygen chamber. The optimization framework consists of a grid generator, a direct solver, and a numerical optimizer. Herein, the GA(Genetic Algorithm) is employed to build the optimizer and the multiphsics code COMSOL is used to be the grid generator and direct solver. Among them, an interface program that integrating the optimizer and COMSOL is developed. It also can improve the temperature distribution of the cooling system in the optimal design process.In analysis of the cooling system, this study investigates the temperature of the three dimensional model to decide the optimal geometric parameters of the oxygen chamber. The design parameters are the distance of cooling system thick, area, the inlet velocity of cooling system and the inlet temperature of cooling system. The objective function is the maximum temperature of the one fixed position of the the hyperbaric oxygen chamber. This study optimizes these to achieve the optimal performance. It also can improve the temperature distribution of the oxygen chamber in the optimal design process. In analysis of the numerical code, the heat transfer equation which are employed as the governing equations to solve the temperature in the oxygen chamber.
These results indicate that the optimal design of cooling system which is combined with the GA and numerical simulation can obtain a largest heat removal. This approach can achieve various design goals by the optimization process of the appropriate geometric parameters of the cooling system thick, area, the inlet velocity of cooling system and the inlet temperature arrangement, such as increasing the efficiency of the oxygen chamber. To improve the performance is the key point in the three dimensional optimal design of cooling system. At the same time, we can improve the performance of alternating hot and cold. In this study, GA (Genetic Algorithm) is to optimize the program, and to find the different result of the distance parameters of U shape type and rectangular shape type for the the overall thermal performance and impact of the chamber. In three-dimensional of U shape type and rectangular shape type cooling system design process are to improve the temperature distribution, we also need to enhance the design parameters to reduce the other effects caused by heat transfer phenomena.
| Identifer | oai:union.ndltd.org:TW/099NTNT5657009 |
| Date | January 2011 |
| Creators | Shih-yun Lin, 林詩韻 |
| Contributors | Chong-Ching Chang, David T.W. Lin, 張仲卿, 林大偉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 58 |
Page generated in 0.0125 seconds