吸附式空調系統之微鰭板蒸發/冷凝器凝結熱傳增強性能研究

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姓名

黃威智(Wei-Chih Huang) 查詢紙本館藏

畢業系所

能源工程研究所

論文名稱

吸附式空調系統之微鰭板蒸發/冷凝器凝結熱傳增強性能研究
(Experimental investigation and heat transfer enhanced performance analysis on micro-fins evaporator/condenser of an adsorption air conditioning system)

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摘要(中)

本研究主要目的為設計一新型式的蒸發/冷凝熱交換器，以供未來固體吸附式製冷系統使用；並在熱交換器的鰭片上做微溝槽結構產生表面張力來達到熱傳增強之效果。本實驗係測試兩種不同熱交換器，分別為平板鰭片與微溝槽鰭片熱交換器來作比較，實驗結果發現有微溝槽結構之熱交換器能達到較好的凝結熱傳性能，並證實了表面張力在凝結時之熱傳增強的效果。
此外，由於固體吸附式製冷系統運作時處於低壓的狀態，故本實驗亦研究在不同飽和溫(壓)下時，其凝結熱傳係數所受之影響，發現熱傳係數會隨著凝結飽和溫的下降而降低。

摘要(英)

The main purpose of this research is to design a new kind of evaporator/condenser heat exchanger, which is applied to an integrated, one-bed, closed-type adsorption air conditioning system. The micro-fin were manufactured on this heat exchanger to bring the surface tension in order to heat transfer enhanced. This research will test two kinds of different heat exchangers, one is with micro-fins and another is plain-fins. In compare of the experiment results of these two heat exchangers, we found that evaporator/condenser heat exchanger with micro-fin have higher heat transfer performance. This result proved that the surface tension can increase heat transfer.
Besides, this research also experimented on different condense temperature. We found that with the decrease in condense temperature, the heat transfer coefficient would also decrease.

關鍵字(中)

★ 固體吸附式製冷
★ 蒸發/冷凝器
★ 微鰭板
★ 表面張力

關鍵字(英)

★ surface tension.
★ micro-fins
★ evaporator/condenser
★ Adsorption air conditioning system

論文目次

目錄
頁次
摘要------------------------------------------------------i
英文摘要-------------------------------------------------ii
目錄 ---------------------------------------------------iii
表目錄 --------------------------------------------------iv
圖目錄 ---------------------------------------------------v
符號說明-----------------------------------------------viii
第一章前言-------------------------------------------1
1.1 研究背景----------------------------------------1
1.2 研究目的----------------------------------------3
第二章文獻回顧---------------------------------------7
2.1 分離式------------------------------------------------7
2.2 一體式------------------------------------------------9
2.3 一體式蒸發/冷凝設計概念 -----------------------------13
2.4 凝結熱傳增強 ----------------------------------------14
第三章實驗方法--------------------------------------30
3.1 簡介 ------------------------------------------------30
3.2 實驗系統構造 ----------------------------------------31
3.2.1 測試段 --------------------------------------------31
3.2.2 冷媒循環系統 --------------------------------------31
3.2.3 水循環系統 ----------------------------------------32
3.3 實驗量測設備 ----------------------------------------32
3.3.1 溫度量測 ------------------------------------------32
3.3.2 流量量測 ------------------------------------------33
3.3.3 壓力量測-------------------------------------------34
3.3.4 資料擷取系統---------------------------------------34
3.4 實驗過程---------------------------------------------34
3.4.1 系統測漏-------------------------------------------35
3.4.2 系統冷媒填充---------------------------------------35
3.4.3 實驗步驟-------------------------------------------35
3.5 資料換算 (data reduction)----------------------------36
第四章實驗結果與討論--------------------------------56
4.1 平板鰭片實驗結果分析.--------------------------------56
4.2 微溝槽鰭片實驗結果分析.------------------------------57
4.3 綜合實驗結果分析.------------------------------------58
第五章結論------------------------------------------70
參考文獻-------------------------------------------------72
附錄-----------------------------------------------------75

參考文獻

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指導教授

楊建裕(Chien-Yuh Yang)

審核日期

2009-7-24

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