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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳希立 | |
dc.contributor.author | Chiao-Hung Cheng | en |
dc.contributor.author | 鄭喬鴻 | zh_TW |
dc.date.accessioned | 2021-06-15T02:38:48Z | - |
dc.date.available | 2009-08-14 | |
dc.date.copyright | 2009-08-14 | |
dc.date.issued | 2009 | |
dc.date.submitted | 2009-08-12 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/44074 | - |
dc.description.abstract | 本論文係以實驗之方式,探討儲能元件應用於空調機過冷卻之性能研究。儲能元件主要由儲能熱交換器、釋能熱交換器、儲能材料以及儲能槽體所組成。儲能元件在空調負荷低於壓縮機之標稱冷凍容量時,將會儲存系統多餘冷能;在空調負荷高於壓縮機之標稱冷凍容量時,儲能元件則釋冷(冰)進行過冷卻,以增加系統冷凍能力與性能係數(Coefficient of performance,以下簡稱COP)。利用儲能元件做為空調機之過冷卻器,除了具有提升系統COP之優點以外,尚具有防止壓縮機發生液壓縮、壓縮機可於高效率之全速運轉狀態下達到能量管理、被動式作動方式可提升系統操作穩定度及可靠度、成本較變頻器低等特色。本論文之實驗係將儲能元件分別搭配三種空調機進行性能測試,空調機種類分別為分離式冷氣機、氣冷式箱型冷氣機與熱泵。在每種空調機之性能測試中,皆會比較在有、無利用儲能元件進行過冷卻時之系統性能差異。在分離式冷氣機之性能測試中,利用儲能元件以顯熱之方式進行過冷卻時,系統COP平均可增加15.3%。在氣冷式箱型冷氣機之研究中,同樣藉由儲能元件以顯熱之方式進行過冷卻時,系統COP增強效果為9%。在熱泵過冷卻研究之實驗結果顯示,利用儲能元件以潛熱方式進行過冷卻,將可提升11%之熱泵COP、15%之冷凍機COP以及9%之系統總COP。 | zh_TW |
dc.description.abstract | This dissertation experimentally investigates the performance of the air conditioner utilizing an energy storage unit as a subcooler. The energy storage unit is composed of the charge and discharge heat exchangers, energy storage material, and tank. The energy storage unit, applied to be a subcooler of air conditioner, can improve the system coefficient of performance (COP). To avoid the liquid compression is one of the advantages. In addition, the energy management of air conditioner is always performed at high efficiency running condition of the compressor. The characteristic of passive and automatic operation without moving parts can enhance the stability and reliability of system. Besides, the initial cost of energy storage unit less than the variable frequency device is also one of the merits. The energy storage unit charges when the cooling load is less than the nominal cooling capacity of compressor. While the cooling load is larger than the nominal cooling capacity, the energy storage unit discharges for subcooling and increasing the system COP. There are three types of air conditioners combined with the energy storage unit and examined the performance enhancement in this dissertation. The air conditioners include single split type air conditioner, air cooled packaged air conditioner, and heat pump. In each air conditioner test, the experiment procedures are divided into the subcooled experiment and non-subcooled one. The results of split type air conditioner test show that the energy storage unit can improve 15.3% system COP. In the exanimation of air cooled packaged air conditioner, the system COP can be increased about 9% by utilizing the energy storage unit as the subcooler. The results of heat pump experiment indicate that the energy storage unit can enhance more 11% heat pump COP, 15% refrigerator COP, and 9% total COP. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T02:38:48Z (GMT). No. of bitstreams: 1 ntu-98-D94522011-1.pdf: 32054656 bytes, checksum: d275547f153f10ac10611e994dc32406 (MD5) Previous issue date: 2009 | en |
dc.description.tableofcontents | 摘 要 I
ABSTRACT II 目 錄 IV 圖目錄 VII 表目錄 XI 符號說明 XII 第1章 緒論 1 1.1 前言 1 1.2 文獻回顧 3 1.3 研究動機與目的 5 1.4 研究方法 6 第2章 工作原理介紹 12 2.1 前言 12 2.2 儲能元件工作原理 12 2.2.1 池沸騰 13 2.2.2 薄膜冷凝 14 2.2.3 薄膜蒸發 15 2.3 儲能元件操作模式 16 2.3.1 儲能(冷)操作模式 16 2.3.2 釋能(冷)操作模式 16 2.3.3 同時儲能(冷)與釋能(冷)操作模式 17 2.4 儲能形式 17 2.4.1 顯熱儲能形式 17 2.4.2 潛熱儲能形式 18 2.5 空調機耗電基準線之建立 19 第3章 儲冰水槽應用於分離式冷氣機過冷卻之研究 26 3.1 前言 26 3.2 儲冰水槽介紹 26 3.3 實驗系統介紹 28 3.4 分析參數介紹 29 3.5 量測系統介紹 30 3.6 實驗步驟 32 3.7 結果與討論 34 3.7.1 固定空調負荷模式 34 3.7.2 變動空調負荷模式 36 第4章 儲冰水槽應用於箱型冷氣機過冷卻之研究 51 4.1 前言 51 4.2 儲冰水槽介紹 51 4.3 實驗系統介紹 53 4.4 分析參數介紹 54 4.5 量測系統介紹 56 4.6 系統耗電基準線之建立 57 4.7 實驗步驟 59 4.8 結果與討論 61 4.8.1 儲冰水槽內部熱交換率 61 4.8.2 儲冰水槽平均水溫 62 4.8.3 無過冷卻增強實驗之系統耗電基準線 62 4.8.4 系統COP 63 第5章 儲冰槽應用於熱泵過冷卻之研究 79 5.1 前言 79 5.2 儲冰槽介紹 79 5.3 實驗系統介紹 81 5.4 分析參數介紹 83 5.5 量測系統介紹 85 5.6 實驗步驟 86 5.7 結果與討論 88 5.7.1 庫房溫度 88 5.7.2 冷媒質量流率 89 5.7.3 儲冰槽與蒸發器之熱交換率 90 5.7.4 儲冰槽平均水溫與冰量百分比 91 5.7.5 蒸發器出入口焓差 91 5.7.6 系統COP 92 第6章 結論與建議 108 6.1 結論 108 6.1.1 儲冰水槽應用於分離式冷氣機之研究 108 6.1.2 儲冰水槽應用於氣冷式箱型冷氣機之研究 109 6.1.3 儲冰槽應用於熱泵之研究 110 6.2 建議 110 參考文獻 112 | |
dc.language.iso | zh-TW | |
dc.title | 儲能元件應用於空調機過冷卻之性能研究 | zh_TW |
dc.title | Performance Investigations of Energy Storage Unit Applied to Subcooling of Air Conditioners | en |
dc.type | Thesis | |
dc.date.schoolyear | 97-2 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 吳文方,陳輝俊,李文興,柯明村,卓清松,張西龍 | |
dc.subject.keyword | 儲能元件,空調機,過冷卻,性能係數, | zh_TW |
dc.subject.keyword | energy storage unit,air conditioner,subcool,coefficient of performance(COP), | en |
dc.relation.page | 115 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2009-08-12 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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