A Study on Thermal Stratification Characteristics and Useful Rate of Hot Water in Thermal Storage Tank during Hot Water Extraction Process

온수 추출과정 동안 축열조 내의 열성층 특성 및 온수 이용률에 관한 연구

  • 장영근 (국민대학교 자동차공학전문대학원) ;
  • 박정원 (유한대학 건축설비과)
  • Published : 2002.06.01

Abstract

Heat flow characteristics during hot water extraction process was studied experimentally. Data were taken at various outlet port type for the fixed inlet port type, inlet-outlet temperature differences and mass flow rates. In this study, the temperature distribution in a storage tank and an outlet temperature were measured to predict a degree of stratification in the storage tank, and a useful rate of hot water was analysed with respect to the variables dominating a extraction process. Experimental results show that the degree of stratification and useful rate of hot water are all high in a low flow rate in case of using modified distributor I (MDI) as the outlet port type.

Keywords

References

  1. Solar thermal energy storage Garg, H. P.;Mullic, S. C.;Bharagava, A. K.
  2. 6th Int. Heat Transfer Conference v.4 Stratification in thermal storage during charging Sliwinski, B. J.;Mech, A. R.;Shih, T. S.
  3. Solar Energy v.28 no.2 Decay of thermal stratification in a water body for solar energy storage Jaluria, Y.;Gupta, S. K. https://doi.org/10.1016/0038-092X(82)90292-4
  4. ASHRAE Trans. v.88 no.1 Thermally stratified tanks Cole, R. L.;Bellinger, F. O.
  5. Solar Energy v.19 Experimental study of thermally stratified hot water storage tanks Lavan, Z.;Thompson, J. https://doi.org/10.1016/0038-092X(77)90108-6
  6. J. of Energy v.3 no.3 Stratification enhancement in liquid thermal storage tanks Loehrke, R. I.;Holzer, R. I.;Gari, J. C.;Sharp, M. K. https://doi.org/10.2514/3.62425
  7. Solar Energy v.9 no.3 Experimental study on the thermal storage efficiency through variable porous manifolds in a test storage tank Pak, E. T.;Hwang, S. I.;Choi, Y. I.
  8. SAREK v.7 no.1 Analytical solutions to a one-dimensional model for stratified thermal storage tanks Yoo, H.;Park, E. T.
  9. SAREK v.7 no.2 Theoretical analysis of the charging process with perfectly mixed region in stratified thermal storage tanks Yoo, H.;Pak, E. T.
  10. SAREK v.10 no.1 Experimental study on flow distribution in manifolds by a tapered header Yoon, Y. H.;Lee, S. H.