Heat transfer characteristics in low-temperature latent heat storage systems using salt-hydrates at heat recovery stage

Choi, Jong Chan; Kim, Sang Done; Han, Gui Young

doi:10.1016/0927-0248(95)00084-4

Cited by 33 publications

(3 citation statements)

References 9 publications

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“…In a study by Ryu et al (Ryu et al, 1992), a super-absorbent polymer (SAP) made from acrylic acid copolymer and CMC-Na was investigated as thickening agent to avoid phase separation, together with K 2 SO 4 as the nucleating agents. The combination of SAT with 1% SAP, 2% CMC-Na and 2% K 2 SO 4 was used in a study by Choi et al of heat storage systems (Choi et al, 1996).…”

Section: Solutionsmentioning

confidence: 99%

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Experimental investigations on heat content of supercooled sodium acetate trihydrate by a simple heat loss method

et al. 2016

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Sodium acetate trihydrate is a phase change material that can be used for long term heat storage in solar heating systems because of its relatively high heat of fusion, a melting temperature of 58˚C and its ability to supercool stable. In practical applications sodium acetate trihydrate tend to suffer from phase separation which is the phenomenon where anhydrous salt settles to the bottom over time. This happens especially in supercooled state. The heat released from the crystallization of supercooled sodium acetate trihydrate with phase separation will be lower than the heat released from sodium acetate trihydrate without phase separation. Possible ways of avoiding or reducing the problem of phase separation were investigated. A wide variety of composites of sodium acetate trihydrate with additives including extra water, thickening agents, solid and liquid polymers have been experimentally investigated by a simple heat loss method. The aim was to find compositions of maximum heat released from the crystallization of supercooled sodium acetate trihydrate samples at ambient temperature. It was found that samples of sodium acetate trihydrate with 0.5% to 2% (wt.%) Carboxy-Methyl Cellulose, 0.3% to 0.5 % (wt.%) Xanthan Gum or 1% to 2% (wt.%) of some solid or liquid polymers as additives had significantly higher heat contents compared to samples of sodium acetate trihydrate suffering from phase separation.

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Section: Solutionsmentioning

confidence: 99%

“…Studies (Cabeza et al, 2003;Choi et al, 1996;Garay Ramirez et al, 2013;Haillot et al, 2012Haillot et al, , 2011Hu et al, 2011;Ryu et al, 1992) focused on short term heat storage in which supercooling of the storage materials has to be avoided. Therefore nucleating agents, which reduce the degree of supercooling, were used in those studies.…”

Section: Solutionsmentioning

confidence: 99%

Experimental investigations on heat content of supercooled sodium acetate trihydrate by a simple heat loss method

et al. 2016

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“…This was found using numerical and experimental methods around finned tube in both radial and axial directions [5]. The effects of thin finned tubes are negligible compare to un-finned tubes, and the use of thick finned tubes resulted in approximately a two times higher heat transfer coefficient value than in an un-finned type [7].…”

Section: Introductionmentioning

confidence: 67%

Investigation of Conducting Pins in Sphere Filled with Phase Change Material for Enhancing Heat Transfer in Thermal Energy Storage

Amin

Bruno

Belusko

2012

AMR

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The utilisation of phase change material (PCM) for thermal energy storage (TES) can significantly enhance the energy savings achievable with renewable thermal systems. Sphere based packed bed systems have been used as TES for many years. However, due to the thermal resistance within these systems, the heat transfer is limited and not all the PCM can be used effectively. This study focuses on heat transfer enhancement options for single PCM sphere in a TES system. An experimental investigation has been conducted using water as the PCM. The thermal performance of plain plastic sphere containing PCM has been compared to plastic sphere encapsulated with conducting pins. The heat transfer rate of the sphere with conducting pins was more than 34% that of the sphere without pins.

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Heat Transfer Characteristics of High Temperature Molten Salt Storage for Solar Thermal Power Generation

Mao

Kim

Han

et al. 2008

Proceedings of ISES World Congress 2007 (Vol. I – Vol. V)

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Heat transfer characteristics in low-temperature latent heat storage systems using salt-hydrates at heat recovery stage

Cited by 33 publications

References 9 publications

Experimental investigations on heat content of supercooled sodium acetate trihydrate by a simple heat loss method

Experimental investigations on heat content of supercooled sodium acetate trihydrate by a simple heat loss method

Investigation of Conducting Pins in Sphere Filled with Phase Change Material for Enhancing Heat Transfer in Thermal Energy Storage

Heat Transfer Characteristics of High Temperature Molten Salt Storage for Solar Thermal Power Generation

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