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A STUDY ON RETROFIT METHODOLOGIES FOR LEGACY AIR-CONDITIONIG SYSTEMS TO REDUCE THEIR IMPACT ON GLOBAL WARMING AND OZONE DEPLETION
http://hdl.handle.net/2237/9690
http://hdl.handle.net/2237/9690433ed809-58c8-40b8-8e8e-ec9f4fc3941b
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goto-main.pdf (809.3 kB)
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goto-cover.pdf (13.6 kB)
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goto-preface.pdf (44.9 kB)
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| Item type | 学位論文 / Thesis or Dissertation(1) | |||||
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| 公開日 | 2008-04-17 | |||||
| タイトル | ||||||
| タイトル | A STUDY ON RETROFIT METHODOLOGIES FOR LEGACY AIR-CONDITIONIG SYSTEMS TO REDUCE THEIR IMPACT ON GLOBAL WARMING AND OZONE DEPLETION | |||||
| 言語 | en | |||||
| 著者 |
後藤, 誠
× 後藤, 誠× Goto, Makoto |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The impact on global warming by the energy consumption of air-conditioning systems is so large that many attempts have been performed to improve their efficiency. In order to reduce their impact on global warming, we are considering retrofit methodologies for legacy air-conditioning systems which use HCFC refrigerant. Since retrofit methodologies have advantage over replacing the whole system in terms of the product life, more study need to be done to reduce the environmental impact of legacy air-conditioning systems. Moreover we have also to think about refrigerant whenever dealing with legacy air-conditioning systems because the quantity of HCFC refrigerant including HCFC22 used in air-conditioning systems must be reduced to 35% or less by 2010 to protect the ozone layer, and to be abolished by 2020, according to the Montreal Protocol. HFC134a, a single (non-mixed) HFC refrigerant, has relatively small GWP (Global Warming Potential) and make the impact on global warming to a minimum. Also HFC134a has zero ODP (Ozone-Depleting Potential). Therefore, if HFC134a could be used in legacy air-conditioning systems with high efficiency, it should contribute to improving ozone depletion and global warming. In this study, I propose installing an additional condenser on to legacy air-conditioning systems with HFC134a as retrofit methodologies to reduce the impact on global warming and ozone depletion. The methodologies are validated from the system analytical and fluid physical view of point. In order to set the validation criteria and to easily understand working mechanism of the system, I take an approach to compare the condition with/without an additional condenser and with HFC134a/HCFC22. Firstly; I examine the performance of the air-conditioning system designed for HCFC22 retrofit with an air-cooled external additional condenser using HCFC22 and HFC134a without changing mineral lubricant oil. Next, the flow of refrigerant and mineral oil is visualized to confirm normal circulation in the system during operation. Moreover, I test the performance of a hot-water supply system using a water-cooled external additional condenser as an application of proposed methodologies and an excellent example of thermal recycling of wasted heat from air-conditioning systems. Finally, I conclude that proposed retrofit methodologies are validated and are effective solutions for legacy air-conditioning systems to reduce the impact on global warming and ozone depletion. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 名古屋大学博士学位論文 学位の種類:博士(工学)(課程) 学位授与年月日:平成20年3月25日 | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||
| 資源タイプ | doctoral thesis | |||||
| 書誌情報 |
発行日 2008-03-25 |
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| 学位名 | ||||||
| 言語 | ja | |||||
| 学位名 | 博士(工学) | |||||
| 学位授与機関 | ||||||
| 学位授与機関識別子Scheme | kakenhi | |||||
| 学位授与機関識別子 | 13901 | |||||
| 言語 | ja | |||||
| 学位授与機関名 | 名古屋大学 | |||||
| 言語 | en | |||||
| 学位授与機関名 | Nagoya University | |||||
| 学位授与年度 | ||||||
| 値 | 2007 | |||||
| 学位授与年月日 | ||||||
| 学位授与年月日 | 2008-03-25 | |||||
| 学位授与番号 | ||||||
| 学位授与番号 | 甲第8018号 | |||||
| フォーマット | ||||||
| 値 | application/pdf | |||||
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| 値 | application/pdf | |||||
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| 値 | application/pdf | |||||
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| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/9690 | |||||
| 識別子タイプ | HDL | |||||
