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Effect of Diffuser Shape on the Performance of Water-Chilled Heat Storage  

정재동 (세종대학교 기계공학과/세종ㆍ일진 자동차부품연구소)
박주혁 (세종대학교 기계공학과/세종ㆍ일진 자동차부품연구소)
조성환 (한국에너지기술연구원)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.16, no.4, 2004 , pp. 374-382 More about this Journal
Abstract
Diffuser design is crucial for water-chilled heat storage. Its impact on the system performance is more significant for the underground tank due to inherent limit on the aspect ratio and tank shape. The effect of diffuser shape on the performance of the water-chilled heat storage is numerically investigated. Three dimensional simulation has been conducted for fully incorporating the complex diffuser shape and the non-symmetric tank shape. Mixing at the inlet of the diffuser depends on the inlet Reynolds number, Froude number and the diffuser shape. Three types of the diffuser shape and the broad range of Reynolds number (Re=400, 800, 1200) and Froude number (Fr=0.5, 1.0, 2.0) are examined. The performance of the heat storage tank is evaluated by the thermocline thickness which is reverse to the degree of stratification. The radial regulated plate diffuser, which is the suggested diffuser shape in this study, shows the lowest thermocline thickness in the condition considered.
Keywords
Diffuser; Water-chilled heat storage; Stratification; Thermocline thickness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Evolution of temperature distributions in a full-scale stratified chilled-water storage tank with radial diffusers /
[ Musser,A.;Bahnfleth,W.P. ] / ASHRAE Transactions: Research
2 Parametric stydy of charging inlet diffuser performance in stratified chilled water storage tanks with radial diffusers: Paer 2-dimensional analysis, parametric simulations and simplified model development /
[ Musser,A.;Bahnfleth,W.P. ] / ASHRAE Transactions: Research
3 Theoretical analysis of the charging process with perfectly mixed region in stratified thermal storage tanks /
[ Yoo,H.;Pak,E.T. ] / Korean J. of Air-Conditioning and Refrigeration Engineering
4 effects on stratification due to diffuser shape in a thermal storage tank /
[ Lee,S.N.;Lee,Y.S.;Park,S.R.;Yoon,H.K.;Park,J.T.;Chang,K.C.;Ra,H.S. ] / Proc. of the SAREK '01 Winter Annual Conference
5 Parametric stydy of charging inlet diffuser performance in stratified chilled water storage tanks with radial diffusers: Paer 1-Model development and validation /
[ Musser,A.;Bahnfleth,W.P. ] / ASHRAE Transactions: Research
6 Development of present status and prospect of unutilized energy /
[ Park,J.T. ] / Proc. of the SAREK '03 Winter Annual Conference
7 Turbulent buoyant flows into a two demensional storage tank /
[ Cai,L.;Stewart Jr.W.E.;Sohn,C.W. ] / Int. J. Heat Mass Transfer   DOI   ScienceOn
8 Analytical approaches to the charging process of stratified thermal storage tanks with variable inlet temperature /
[ Yoo,H. ] / Korean J. of Air-Conditioning and Refrigeration Engineering
9 /
[ Blevins,R. ] / Applied Fluid Dynamics Handbook
10 Experimental study on stratification according to diffuser shape in the rectangular thermal storage tank /
[ Cho,S.H.;Tae,C.S.;Jang,C.Y.;Lee,C.K.;Yang,S.H.;Kang,H.K. ] / Proc. of the SAREK '03 Summer Annual Conference
11 Analytical solutions to a one-dimensional model for stratified thermal storage tanks /
[ Yoo,H.;Pak,E.T. ] / Korean J. of Air-Conditioning and Refrigeration Engineering
12 Laminar flow efficiency of stratified chilled-water storage tanks /
[ Homan,K.O.;Soo,S.L. ] / Int. J. Heat and Fluid Flow   DOI   ScienceOn
13 Interfacial instability and mixing in stratified flows /
[ Keulegan,G. ] / Fluid Research National Bureau of Standards   DOI
14 Influence of inlet geometry on mixing in thermocline thermal energy storage /
[ Zurigat,Y.H.;Liche,P.R.;Ghajar,A.J. ] / Int. J. Heat Mass Transfer   DOI   ScienceOn
15 /
[ Dincer,I.;Rosen,M.A. ] / Thermal Energy Storage
16 Air-conditioning with chilled-water thermal storage /
[ Yoo,J.L. ] / Mag. Soc. Air-Cond. and Refrig. Eng. Korea   과학기술학회마을