Numerical and experimental study on the design of a stratified thermal storage system

Shin, Misoo; Kim, Hey-Suk; Jang, Dongsoon; Lee, Sang-Nam; Lee, Young-Soo; Yoon, Hyung Kee

doi:10.1016/s1359-4311(03)00242-4

Cited by 88 publications

(25 citation statements)

References 6 publications

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“…Mixing takes place when the water inlet temperature is different from that of the stored water with which it comes into contact. Therefore, designing water inlet devices to distribute the flow uniformly improves the performance of thermal storage tanks by restraining the mixing induced by water inflow [4][5][6][7][8].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

A new inlet device that enhances thermal stratification during charging in a hot water storage tank

García-Marí¹,

Gasque²,

Gutiérrez-Colomer³

et al. 2013

Applied Thermal Engineering

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Section: A N U S C R I P Tmentioning

confidence: 99%

A new inlet device that enhances thermal stratification during charging in a hot water storage tank

García-Marí¹,

Gasque²,

Gutiérrez-Colomer³

et al. 2013

Applied Thermal Engineering

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“…Oppel et al (1986), Homan et al (1996), Rodriguez et al (2002), oon et al (2003) and Shin et al (2003) developed different computer odels in order to study the thermal stratification mechanism in storage nks, and thereby determine the optimum design and operating condions. However, since the aim of their work was to investigate thermal torage tanks used in thermal solar systems, the results were not directly pplicable when analysing the hot water system for a residential CO 2 heat p. Most of the calculations were carried out for a static system without inlet and outlet water flows, and the DHW tank was either filled with hot water or with equal volumes of hot water and cold city water.…”

Section: S 2mentioning

confidence: 99%

Residential CO2 heat pump system for combined space heating and hot water heating

Stene

2005

International Journal of Refrigeration

149

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“…Radial diffusers were studied by Shin et al [54] using standard k-ε and the ReNormalized Group (RNG)…”

Section: Computational Fluid Dynamics Modelling Of Tstmentioning

confidence: 99%

Numerical Analysis of Thermal Stratification in Large Horizontal Thermal Energy Storage Tanks

Shaarawy

Lightstone

2016

Journal of Solar Energy Engineering

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In order to enhance the performance of a large horizontal thermal energy storage, a numerical model was generated and validated using measurements obtained from Drake Landing Solar Community (DLSC). A total of nine different baffle configurations were tested in order to enhance the thermal stratification. The designs were tested for a total of six different cases of charging, discharging and simultaneous charging and discharging in an attempt to better identify key features that mix the tank under realistic conditions. Characterization of the tank performance was done by monitoring the tank outlet temperature and computing Huhn's efficiency (2 nd Law characterization index).Results show that the current tanks at DLSC experience excessive mixing due to plume entrainment that occurs during the spreading of the inlet jet. The introduction of a baffle into the middle of the tank was found to have no impact on the level of stratification. In addition, most designs tested have a relatively high level of stratification during charging, discharging and simultaneous charging and discharging, but fail to sustain the level of stratification when a positive buoyant jet is introduced.It was demonstrated that the inlets and outlets should be moved to the top and bottom of the tank to eliminate stagnant fluid that is not easily discharged. Horizontal baffles are effective in allowing the inlet jet to spread horizontally but not vertically, thus reducing the mixing. Alternatively, a simple solution would be to increase the size of the inlet, which has a comparable performance to the best baffle configurations.

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Numerical and experimental study on the design of a stratified thermal storage system

Cited by 88 publications

References 6 publications

A new inlet device that enhances thermal stratification during charging in a hot water storage tank

A new inlet device that enhances thermal stratification during charging in a hot water storage tank

Residential CO2 heat pump system for combined space heating and hot water heating

Numerical Analysis of Thermal Stratification in Large Horizontal Thermal Energy Storage Tanks

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