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http://dx.doi.org/10.3795/KSME-C.2014.2.1.065

Performance Improvement of Stratified Thermal Storage Tank Using Heat Insulator  

Lim, Se Hwa (Dept. of Mechanical Engineering, Hongik Univ.)
Lee, Tae Gyu (Dept. of Mechanical Engineering, Hongik Univ.)
Shin, Seungwon (Dept. of Mechanical Engineering, Hongik Univ.)
Publication Information
Transactions of the KSME C: Technology and Education / v.2, no.1, 2014 , pp. 65-72 More about this Journal
Abstract
The purpose of this study is to design a heat insulator for reducing available energy loss in stratified thermal storage tank. Heat insulator is operated by buoyancy effect from density difference between hot and cold water without extra equipment. Analysis model using the Matlab Simulink was developed to estimate the internal temperature distribution in thermal storage tank and also used to select proper material and thickness of the heat insulator. Operational feasibility was confirmed through reduced scale experiment. As a result, heat insulator can effectively delay the formation of thermal boundary layer between hot and cold water. In reduced scale experiment, heat insulator can preserve additional 1540J of available energy. When applied to the real thermal storage tank, increase of 6% thermal storage efficiency can be expected.
Keywords
Stratified Thermal Storage; Heat Insulator; Thermal Boundary Layer;
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1 이동언, 2008, "발전플랜트용 축열조 온수공급관 디퓨저의 성능해석", 한양대학교 대학원.
2 이영수, 이상남, 2005, "온도 성층축열조 설계, 제작 및 실증분석에 관한 고찰", 대한설비공학회 2005년 국제할술강연회 및 신기술발표회, pp . 426-444
3 신미수, 김혜숙, 송혜영, 장동순, 이영수, 이상남, 2002, "성층축열조 최적설계를 위한 연구", 한국전산유체공학회 2002 년 추계학술대회 논문집, pp. 127-132.   과학기술학회마을
4 임종성, 1993, "공조용 축열 시스템", 대한기계학회지, Vol. 33, No. 2, pp. 183-190.   과학기술학회마을
5 이동혁, 장종훈, 2002, "축열 시스템의 열적 성층화 효과에 관한 해석적 연구", 대한기계학회 2002 년도 춘계학술대회 논문집, pp. 2131-2136.
6 이건태, 2001, "지역난방용 축열조의 소개", 대한설비공학회 설비저널, Vol. 30, No. 12, pp. 35-37.   과학기술학회마을
7 F. J. Oppel, A. J. Ghajar and P. M. Moretti, 1986, "Computer simulation of stratified heat storage", Applied Energy, Vol 23, No. 3, pp. 205-224.   DOI   ScienceOn
8 Ghanim Kadhem Abdulsada and Mohammed Hamed Mahmoud, 2008, "Enhancing Thermal Stratification in Liquid Storage Tanks During Relaxation Periods", Journal of Engineering and Development, Vol. 12, No. 1, pp. 161-175
9 J. Van Berkel, 1996, "Mixing in Thermally Stratified Energy Stores", Solar Energy, Vol. 58, No. 4, pp. 203-211.   DOI   ScienceOn