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  • 學位論文

探討中溫地熱溫泉水利用熱交換作加熱效率評估-以瑞穗碳酸氫鹽泉為例

Exploration the heating efficiency evaluation of geothermal water by heat exchanging process at mid-temperature -in case of the bicarbonate water of Rui-sui

指導教授 : 張陸滿

摘要


根據世界能源委員會(WEC)2016年報導,「現今地熱能源在全球電力使用率還不到1%」,在世界人口急增及傳統石化能源資源日漸稀少情況下,發展可再生的地熱能源應是解決能源問題一個好方法,地熱是一種乾淨無污染及穩定供應的能源。根據2014年的科技報導的報導,「臺灣地區約有128處有溫泉徵兆的區域,其中有50%的區域為中溫溫泉」,中高溫地熱溫泉除了可發電外,還可以利用熱交換器將地熱的熱源轉換為其他用,「加熱」就是其中一項,尤其對一家大型建築飯店來說,熱水是能耗排列第三的項目,本論文以利用中溫地熱溫泉經熱交換,將溫泉熱量移轉至常溫自來水作為升溫的熱源,與一般柴油鍋爐加熱方式比較,並以實際案例分析,探討地熱作「加熱」熱源的可行性。 在溫泉水及鍋爐加熱水利用熱交換的模擬與實驗中,在模擬的結果顯示溫泉水平均熱交換效能低於鍋爐加熱,在流量65 LPM時為1.6%~10.46%,實體實驗的結果也是相同的情形,在流量相同下熱源溫度45℃~60℃之間溫泉水熱交換效能較柴油鍋爐低約4%至7.04%。依實際實驗結果得知,在溫泉水及鍋爐價加熱水在60℃與流量65 LPM時,取得常溫自來水還未達到需求溫度55℃,需再行加熱。 經案例探討之實驗結果,了解溫泉水經過熱交換後所獲得的效益,可節省670(KW/h)使用的電能,相對於每年可節省2,934,600(KW)的電能。 又,柴油鍋爐會產生空污、CO2排放等影響我們的環境品質,相對地,使用穩定、持久、無能耗、佔地小、又可以多層面使用的地熱溫泉,也能解決能耗與環境的問題,實在是值得開發研究的重要資源,對需要進口99.4%能源的台灣來說,發展地熱資源作為能源似乎是勢在必行的政策,尤其是應用地熱作為加熱能源的技術並不需高端的技術與昂貴設備即可實施,地熱「加熱」應用是值得企業投資的一項設施。

並列摘要


In accordance with the report of World Energy Council, 2016, 「Even in electricity generation, geothermal produces less than 1% of world’s output」, in situation of the grow rapidly of population all over the world and petrifaction energy exhausts little by little, to develop the renewable energy resources should be a good solution for current energy issues, according to the report from SciTech reports, July, 2014,「There are near 128 areas have symptom of geothermal around Taiwan, the moderate temperature geothermal occupy 50% in all area」, moderate and high temperature geothermal are not only for power generation , but actually these resources could be transferred the heat source to the others materials using, warm-up is one of the that, especially for big hotel architectures, normally, hot water supplied would rank the 3th of energy consumption in hotel. This thesis will use moderate temperature geothermal water which transfer its heat to city water by the heat-exchanger, will compare heat transfer efficiency with diesel boiler, meanwhile, refer real case analysis to explore the feasible of using geothermal water to warm up city water. In process of utilizing heat transferring of simulation and experiment for geothermal and boiler water, the final results displayed the heat transferring efficiency of geothermal is lower than boiler’s, geothermal is lower between 1.6% and 10.46% at 65LPM flow speed. the real experiment has same result as simulation’s, the heat transferring efficiency of geothermal is also lower than boiler’s between 4% and 7.04% at same flow speed among 45 and 60℃. According to the real experiment results, the both geothermal and boiler warm-up water are not reached at 55℃degree in need at 60℃temperature and 65LPM flow rate, the city water by process should be warm up again. It could realize that the benefit obtained from geothermal heat transferring by the experiment results of real case , which could save 670(KW/h) power source and save 2,934,600(KW) each year. Furthermore, the diesel boiler products air pollution and CO2 emission, that will influence our environment quality, oppositely, to utilize the stability, permanent, no-energy exhaust, no wide space and multipurpose application of geothermal, which also resolves energy exhaust and environment pollution issues, it is very worth to study and development energy proposals, for such a island country of Taiwan where needs to import 99.4% of energy materials every year, to develop geothermal resources is a very important energy policy in necessary, especially, the application of geothermal development does not need very high technology and expensive facilities in field, the「warm-up」application of geothermal resources is very worth to investment facility for enterprises.

並列關鍵字

Geothermal Heat exchanger LMTD Geothermal source Boiler

參考文獻


1. ANSI/AHRI, 「Appendix C. Method of test for liquid to liquid heat exchangers-normative」, ANSI/AHRI Standard 400, 2015。
2. ANSI/AHRI, 「Appendix D. Method of simulating field fouling allowance-normative」, ANSI/AHRI Standard 400, 2015。
3. ANSI/AHRI, 「Appendix E. LAB test piping and instrument requirements-normative」, ANSI/AHRI Standard 400, 2015。
4. ENERGY STAR, 「Thermal Energy Conversions」, Technical Reference, ENERGY STAR, 2014。
5. John W. Lund and Tonya L. Boyd,「Direct Utilization of Geothermal Energy 2015 Worldwide Review」, Geo-Heat Center, Oregon Institute of Technology, Klamath Falls, U.S.A., 2015。

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