The Study of Computer Aided Heat Exchanger Design 吳怡德、謝其源
E-mail: 9419544@mail.dyu.edu.tw
ABSTRACT
The purpose of this study is to develop a computer aided heat exchanger design system, which provides a user friendly interface.
Combined with Delphi’s interactive operation mode and MS-SQL extensive database processing capability, the software system is possible to simplify the massive tasks, such as graphic chart consultation and complex calculations encountered in the process of designing heat exchanger. The system will help the user to obtain a correct design effectively and conveniently. This system is built with several features. There are distributed framework, separate database, application and web servers. The system is then open to vast users through internet. The order of influences of different design parameters is tube outsider diameter, inter-tube distance and inter-stopper distance. Both shell and tube pressure drops will decrease as the inter-stopper distance increases. The inter-tube distance will increase associated with the enlarged tube outside diameter. These will bring down both sell and tube pressure drops. If the major parameter, tube outside diameter, is fixed, the shell and tube pressure drops can be managed to drop slightly as long as the inter-tube distance is also enlarged slightly. The data of media, theoretical and experiential equations needed for designing a heat exchanger is programmed. The amount of heat transfer and heat transfer coefficients, heat transfer area, shell inside diameter, tube numbers and pressure drop will be also calculated. In order to meet the requirement of structural design and space constrain, the regulations of HEDH and TEMA, and the influence of design parameters toward space constrain are recommended through the help menu and suggestion windows. The input parameters can then be changed accordingly to meet the performance requirement and space constrain. Furthermore, the needed HEX design is also optimized to have the least pressure loss.
Keywords : shell-and-tube heat exchanger ; TEMA ; HEDH ; optimal design ; distributed framework ; web server Table of Contents
第一章 緒論 ………1 1.1 前言 ………1 1.2 研究 動機與目的 ………1 第二章 文獻回顧 ………3 第三章 熱交換 器 ………6 3.1 熱交換器的種類 ………6 3.2 熱交換器的構造 ……
………6 第四章 基本理論與數學方程式 ………12 4.1 基本理論與假設 ………
………12 4.2 殼管式熱交換器之數學方程式 ………13 4.3 管側流動 ………
………15 4.4 殼側流動 ………17 4.5 所需熱傳面積與管數 ………
…………25 第五章 網際網路技術整合 ………27 5.1 資料處理架構 ………
……27 5.2 Two-tier主從架構 ………28 5.3 Multi-tier分散式架構 ………28 5.4 系統建構……… 30 5.5 熱交換器程式系統簡介……… 32 5.6 熱交換 器程式設計比對驗證……… 33 第六章 結果比較與討論……… 35 第七章 結論…
……… 46 7.1 本文結論……… 46 7.2 未來工作方向……
……… 47 參考文獻……… 83 REFERENCES
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