棚板式冷凍真空乾燥機設計研究

Research on the design of Shelf Type Freeze Dryer

簡裕晉(U-gine Gen)

指導教授 ： 鄭鴻斌

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00498

摘要

冷凍真空乾燥技術是一項適用於食品、生物製品、生醫材料、微奈米材料的乾燥、護色、保鮮、保存、保營養成分的技術，其原理是在真空狀態下，利用昇華原理，使預先凍結的物料中的水分不經過冰的融化直接以冰態昇華為水蒸氣而除去，從而獲得乾燥製品。本論文將針對棚板式冷凍真空乾燥設備進行系統計算與設計研究，首先對乾燥樣品的需求量來設計規劃冷凍真空乾燥系統流程、負載計算、元件匹配、真空腔體尺寸及系統設計組裝，再與市面上能力相仿的棚板式冷凍真空乾燥機比較基本性能及乾燥實驗。在實驗中發現腔體的氣密度、蒸發吸附盤管(cold trap)降溫速率及熱交換器的效率皆比市面上對照機台佳，且在水的乾燥實驗中，實驗機台的抽水量、蒸發吸附盤管(cold trap)捕水量、抽水效率及耗電量皆優於對照機台。

關鍵字

冷凍真空乾燥 ； 負載計算

並列摘要

Vacuum freeze-drying is a technology used for drying, color protection, fresh keeping, or nutrition preservation of food, biologics, biomaterials, or micro/nano materials. Its principle is to use sublimation principle under the vacuum state, and to obtain dried products, whereby frozen water in the material sublime or shift directly from the frozen state to a gas state, and watery element is removed without melt. This thesis is focused on the calculation and the design of shelf type freeze dryer. The system process is firstly designed for the demand of the dried sample, then load calculation, component matching, as well as the size of the vacuum chamber are decided, and the system is assembled finally. Furthermore, the research compare the basic capacity of the system with one of the similar shelf type freeze dryers in the market, and drying experiments are conducted. In experiments, performances of the chamber density, the cooling speed of cold trap, and the efficiency of heat exchanger are all better than the contrast machine, so do the results of drying volume of the experimental machine, water capture of cold trap, drying efficiency, and electricity consumption in drying experiments of water.

並列關鍵字

vacuum freeze-drying ； load calculation

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