冷媒R22在板式熱交換器內之凝結熱傳及壓降性能實驗分析

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姓名

黃敬筌(Chin-chuan Huang) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

冷媒R22在板式熱交換器內之凝結熱傳及壓降性能實驗分析
(Performance analysis of condensation heat transfer and pressure drop of refrigerant R22 in the plate heat exchanger)

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摘要(中)

本文主要以實驗方法對硬銲型板式熱交換器的凝結性能測試與分析。工作流體為水對冷媒R22。測試的板式熱交換器有兩種型式，分別為K070與K050。此兩種熱交換器配合壓縮式冷凍循環系統作實地運轉測試分析其性能。
本研究架設一額定能力為2冷凍噸之壓縮式冷凍空調系統，進行板式熱交器之凝結測試。測試條件依美國AHRI (Air-Conditioning, Heating, and Refrigeration Institute) 450冷凝器標準進行實驗。由實驗結果得知，分別計算凝結過程中之過熱段、兩相區以及過冷段之熱傳量、對數平均溫差、面積以及熱傳係數將會因為計算過程過於繁複而使得誤差變大。故本研究修正計算方式，計算整體熱交換器的凝結性能。以供未來相關研究人員使用設計參考。

摘要(英)

This Study makes an experiment on condensing heat transfer and pressure drop performance of a plate heat exchanger. The working fluid is R22 in the study. There two types plate heat exchangers which are K070 and K050 have been test. The test has been operating in a compressible chiller system.
In the study, 2 RT capacity compressible chiller system has been build to make condensing experiment. Operating conditions according to AHRI 450 standard(Air-Conditioning, Heating, and Refrigeration Institute). The experimental results shown the accuracy is very large while calculating heat transfer coefficient of superheat, two phases and subcool region respectively. The study modified the calculating method to estimate the overall condensing heat transfer coefficient. The results will provide some designer information for designers of plate heat exchanger.

關鍵字(中)

★ 壓降
★ 板式熱交換器
★ 冷凝
★ 熱傳

關鍵字(英)

★ condensation
★ plate heat exchanger
★ pressure drop
★ heat transfer

論文目次

摘要 i
目錄 iii
表目錄 v
圖目錄 vi
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 6
2.1 單相流體於板式熱交換器內之熱傳與壓降 6
2.2 凝結熱傳機制 8
2.3 板式熱交換器內之凝結性能 10
第三章實驗方法 23
3.1 實驗系統 23
3.2 實驗量測設備 24
3.2.1 溫度量測 25
3.2.2 壓力測量 25
3.2.3 壓差測量 25
3.2.4 流量測量 25
3.2.5 資料擷取系統 25
3.3 實驗步驟 25
3.4 實驗數據分析 25
第四章實驗結果與討論 35
第五章結論 59
參考文獻 60
附錄-誤差分析計算 64

參考文獻

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指導教授

楊建裕(Chien-Yuh Yang)

審核日期

2009-7-27

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