研究生: |
魏哲立 LI-WEI CHE |
---|---|
論文名稱: |
以封閉式循環水進行空調系統地層散熱之成效評估 Evaluation of Using Close-loop Circulating Water to Dissipate the Heat from Air-conditioner |
指導教授: |
廖洪鈞
Hung-Jiun Liao |
口試委員: |
江維華
none 王文博 none 周南山 none 鄭國雄 none |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2012 |
畢業學年度: | 100 |
語文別: | 中文 |
論文頁數: | 91 |
中文關鍵詞: | 封閉式循環水系統 、景美礫石層 、熱擴散 、熱傳導係數 |
外文關鍵詞: | close-loop circulating water system, chingmei gravel stratum, thermal spread, thermal conductivity |
相關次數: | 點閱:204 下載:0 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本研究為透過一系列實際的試驗來探討以封閉式循環水系統進行空調系統地層散熱之成效評估 。試驗場地位在台灣科技大學「研揚大樓」,試驗方法為利用管長100m的封閉式循環水系統(含不同循環方式),並透過板式熱交換器評估冷卻本系統冷氣機之成效。
試驗結果顯示,以15RT冷氣機作為熱量之來源,當地中循環管線之浸水長度為50m時,其現地地層之散熱能力並無法承受此大量之廢熱,使地中循環管線中之水溫在2~3小時內迅速的攀升,其平均溫升速率約為0.135℃/min。
最後使用地溫擴散數值分析軟體TEMP/W反算地中管在松山和景美層之熱擴散趨勢與範圍,求得當熱傳導係數(k)介於2~3 W/m℃間時,模擬之地中管降溫趨勢與現地試驗相符,並用k求得松山和景美層之單位浸水長度吸熱量介於0.141 kW/m到0.212 kW/m;由現地地層之散熱能力,可求得冷氣機之最佳化設計, 以本研究50m浸水長之地中管,可供2~3RT之冷氣機每天連續運轉10小時,停機14小時的模式進行操作。
With a series of experiments, this study explores performances of air-conditioning system stratum radiation with closed circulating water system. The experiment site is Yanyang Building at National Taiwan University of Science and Technology. The method is using 100-meter-long well closed circulating water system (circulating: medium temperature water in inner pipe and high temperature in outer pipe or medium temperature water in outer pipe and high temperature in inner pipe). Performance of the air-conditioner that cools the system is evaluated with plate heat exchanger.
The results show that use the 15RT air-conditioner as the heat source and underground well immerse to groundwater of 50-meter. The in-situ stratum of cooling capacity cannot take the air-conditioner waste heat. The well loop pipeline water temperature to rise rapidly within 2~3 hours, the average temperature rise rate approximately of 0.135℃/min.
With simulation of heat expansion and scope of pipe in the well in stratum with earth temperature expansion analysis software, TEMP/W, the results show that, under thermal conductivity (k) between 2 and 3 W/m℃, temperature drop trend in simulated well pipe corresponds to site experiment, unit water soaking length heat absorption of stratum is between 0.141 kW/m and 0.212 kW/m.
The air-conditioning optimized design to gain by in-situ stratum of cooling capacity. In this study the underground well immerse to groundwater of 50-meter, can support about 2~3RT air conditioner to continuous operation 10 hours and stop 14 hours of mode operation a day.
1.Brettmann, T. and Amis,T. Thermal Conductivity Evaluation of Pile Group Using
Geothermal Energy piles, Geo-Frontiers ASCE, pp.499-508, 2011.
2.Georgios Florides, Soteris Kalogirou. “Ground heat exchangers—A
review of systems, models and applications,” Renewable Energy 32,
pp. 2461–2478, 2007.
3.Larry Jeffus, ”Refrigeration and Air Condition,” Pearson Education Inc, 2004.
4.Rees, S.W., Zhou, Z. and Thomas, H.R., “The influence of soil moisture content
variations on heat losses from earth-content structures: an initial
assessment,” Building and Environment, pp.157-165, 2001.
5.Klopper & Kroger, Cooling Tower Performance Evaluation: Merkel, Poppe, and e-NTU Methods of Analysis, Journal of Engineering for Turbines and Power. Vol. 127
6.Cengel., Y.A., “Heat transfer-A Practical Approach,” New York: McGraw-Hill
Book Co., 1998.
7.Cotton, W. R., and R. A. Pielke,: Human impacts on weather and climate.
Cambridge, University Press, 1996.
8.Bejan, A, Lage, J.L., Heat transfer from a surface covered with hair.
Convective Heat and Mass Transfer in Porous Media (eds. Kakac, S., Kilkis, B.,
Kulacki, F.A., Arinc, F.), Kluwer Academic, Dordrecht, pp.823-845, 1991.
9.TEMP/W handbook, GEO-SLOPE software, 2007 edition
10.ASHRAE 1118-TRP, Methods for Determining Soil and ROCK
Formation Thermal Properties form Field Tests
11.Holman, J. P., “Heat Transfer,” New York: McGraw-Hill, Inc., 7th ed., 1990
12.Cheremisinoff, Nicholas P., “Heat Transfer Pocket Handbook”, Gulf
Publishing Co., Houston Texas, 1984
13.Farouki, O.T., “Thermal Properties of Soils. CRREL Monograph
81-1. U.S. Army Corps of Engineers, Cold Regions Research and
Engineering Laboratory, New Hampshire, 1981.
14.Harlan, R. L., and Nixon J. F., “Ground Thermal Regime,”
Geotechnical Engineering For Cold Regions, Edited by
Andersland and Anderson, McGraw-Hill Inc., 1978.
15.Johansen, O., “Thermal Conductivity of Soils,” Ph.D. thesis. Trondheim,
Norway, 1975
16.潘子明,「退伍軍人症」,科學月刊,第二十六卷,第三期,第199-206 頁(1995)。
17.顏仁智,「冷卻水塔水處理簡介」,中國冷凍空調雜誌,第八期,1993。
18.鐘柏仁,「核廢料深層處置進場岩石熱力學行為初步研究」,碩士論文,國立成功大學資源工程系,台南
(2001)
19.戴豪君,「深層岩體熱力-水力-力學耦合行為之初步研究」,碩士論文,國立成功大學資源工程系,臺南
(2003)
20.鐘文仁,「鄰近基腳對基礎承載力影響之數值分析」,碩士論文,國立雲林科技大學營建工程系碩士班,雲
林 (2009)
21.陳正逸,「以循環式地下水作為空調系統散熱媒介之研究」,碩士論文,國立台灣科技大學營建工程所,臺
北(2005)
22.郭俊男,「不同流量循環地下水對冷卻空調系統效能之研究」,碩士論文,國立台灣科技大學營建工程所,
臺北(2006)
23.許瑞銘,「屋頂綠化熱效益之研究」,碩士論文,朝陽科技大學建築及都市設計設計研究所,臺中 (2006)
24.林俊宏,「粉體在不同含水量及乾單位重下之熱傳導係數」,碩士論文,國立中央大學土木工程研究所,桃園 (2006)
25.廖洪鈞、郭治平、陳政逸、湯清吉,「以臺北盆地景美層水體冷卻水冷式空調系統之研究」,(2005)
26.廖洪鈞、郭治平、郭俊男,「模擬不同流量地水碓冷卻空調系統效能影響之研究」,第12屆大地工程研討會
論文集,(2007)
27.廖洪鈞、郭治平,「臺北盆地景美層水體傳熱行為之數值模擬研究」,第13屆大地工程研討會論文集,
(2009)
28.彭善玉,「小型地源熱泵於空調冷房應用初探」,碩士論文,國立台灣科技大學建築研究所,臺北
(2008)
29.彭開駿,「冷卻水泵變頻之節能研究」,碩士論文,國立臺北科技大學能源與冷凍空調工程研究所,臺北
(2007)
30.陳靜宜,「冰動工法於隧道鏡面工程之行為研究與數值分析」,碩士論文,國立台灣科技大學營建工程系,
臺北(2007)
31.許家榮,「降載下冷卻水塔之節水分析」,碩士論文,國立成功大學機械工程研究所,臺北(2008)
32.王晨昕,「變頻控制應用於循環式地下水冷卻系統之節能研究」,碩士論文,國立台灣科技大學營建工程
所,臺北 (2010)
33.王梅因,「核廢料地下處置場之岩石材料參數對工程障壁飽和度影響分析」,碩士論文,國立中央大學土木
工程學系,桃園 (2011)
34.王文博、胡興邦,「冷凍空調原理(上)」,承美科技圖書有限公司出版,(1993)
35.王文博、胡興邦,「冷凍空調原理(下)」,承美科技圖書有限公司出版,(1993)
36.蕭明哲、沈志秋,「冷凍空調概論」,全華圖書股份有限公司出版,(2008二版)
37.王啟川,「熱交換設計」,五南圖書出版股份有限公司,(2007)
38.陳俊良,「熱力學與熱工學」,科技圖書股份有限公司出版,(1991)
39.經濟部能源局,熱泵熱水系統Q&A節能技術手冊