真空預冷庫體結構分析與設計

Structure Analysis and Design of Avacuum Cooler

莊曉明(Hsiao-Ming Chuang) ； 李允中(Yeun-Chung Lee)

《農業機械學刊》 15卷3期 (2006/09) Pp. 1-13

https://doi.org/10.30062/JAM.200609.0001

摘要

真空預冷是蔬菜最有效的預冷方式之一，尤其對於葉菜類格外顯著，美日皆已發展完備。國內第一部自行研發完成的真空預冷庫已在雲林縣啓用，由於缺乏使用試驗數據，庫體並未經過嚴厲的設計過程，因此有待進一步的研究。電腦輔助工程分析為解決工程科學問題的利器，其中最為大量採用的數值分析技術如有限元素法等，尤其配合現今電腦硬體的進步，也促進了有限元素分析軟體在產業界的廣泛應用。本研究將以實測庫體模型及電腦軟體模擬分析真空預冷庫體，研究中使用Cosmos/Design Star有限元素分析軟體，模擬庫體模型與現有預冷設備結構，對照模型所量測的數據；以建立預冷庫體承受真空運轉的能力，提供預冷設備的設計依據。

關鍵字

真空預冷庫 ； 電腦輔助工程分析 ； 有限元素分析軟體 ； 結構分析設計

並列摘要

Vacuum cooling is one of the most effective methods for vegetable pre-cooling process. Although it is a very common practice in America and Japan, but in Taiwan, the first domestic manufactured vacuum cooler just started to operate in Yun-Lin County in 2001. Due to in short of experimental data, the vacuum cooler is not a well-designed equipment yet. Computer Aided Engineering (CAE) is an efficient way for solving engineering problems. The improvement of computer hardware nowadays, finite element method (FEM) becomes the most popular tool used in the industrial circles. This research endeavors to analysis a vacuum cooler by experiments and computer simulations using FEM. A 450mm×500mm×700mm scale experimental vacuum cooler was constructed for structure studies during vacuum operating. A commercial design software named ”Cosmos/Design Star” was used for computer simulations. The simulation data were compared with the experimental measurements. Both data were very consistence in displacements and strains on the structure surface during vacuum operation. The research offers the ability of vacuum cooler being accepted by vacuum operating, and CAE might be a good foundation of vacuum cooler design in the near future.

並列關鍵字

Vacuum cooler ； Computer Aided Engineering ； Finite element method solver ； Structure analysis and design