Performance characterization of a PCM storage tank

López-Navarro, A.; Biosca-Taronger, J.; Corberán, José M.; Peñalosa, Conchita; Lázaro, Ana; Dolado, Pablo; Payá, J.

doi:10.1016/j.apenergy.2013.12.041

Cited by 93 publications

(42 citation statements)

References 27 publications

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“…14 and 15 that HTF mass flow rate has the biggest impact on the effectiveness of the system, then is the fin height, while HTF inlet temperature seems has minor impact. In general, the value of e is less than 1.0 which was also verified by literatures [41][42][43]. However, if the heat exchange process between HTF and PCM is strongly effective, it is possible to have HTF outlet temperature (T f, out ) lower than PCM average temperature (T p, avg ), which thus results in e value greater than 1.0.…”

Section: Effectiveness Of the Pcm Thermal Storage Systemsupporting

confidence: 55%

Numerical analysis of a shell-and-tube latent heat storage unit with fins for air-conditioning application

2015

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Section: Effectiveness Of the Pcm Thermal Storage Systemsupporting

confidence: 55%

Numerical analysis of a shell-and-tube latent heat storage unit with fins for air-conditioning application

2015

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“…López-Navarro et al did an experimental characterization of a PCM storage tank with paraffin [7]. Novo et al did a review on large seasonal sensible heat storage [8].…”

Section: State Of the Artmentioning

confidence: 98%

Experimental investigations on cylindrical latent heat storage units with sodium acetate trihydrate composites utilizing supercooling

2016

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h i g h l i g h t sThermal energy storage units with supercooled of sodium acetate trihydrate are characterized. Heat exchange capacity rates were lower for units with PCM with thickening agents. Phase separation of sodium acetate trihydrate was avoided by thickening agent. a b s t r a c t Latent heat storage units utilizing stable supercooling of sodium acetate trihydrate (SAT) composites were tested in a laboratory. The stainless steel units were 1.5 m high cylinders with internal heat exchangers of tubes with fins. One unit was tested with 116 kg SAT with 6% extra water. Another unit was tested with 116.3 kg SAT with 0.5% Xanthan rubber as a thickening agent and 4.4% graphite powder. The heat exchange capacity rate during charge was significantly lower for the unit with SAT and Xanthan rubber compared to the unit with SAT and extra water. This was due to less convection in the thickened phase change material after melting. The heat content in the fully charged state and the heat released after solidification of the supercooled SAT mixtures at ambient temperature was higher for the unit with the thickened SAT mixture. The heat discharged after solidification of the supercooled SAT with extra water decreased over repeating charge and discharge cycles while the heat discharged from the SAT with Xanthan rubber remained stable. In both units, the solidification started spontaneously in the majority of the test cycles. This was due to the design of the unit or the method for handling the expansion and contraction of the SAT during charge and discharge.

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“…However, repeated thermal cycling of pure PCMs does result in some drawbacks. For instance the experiment conducted on a pure PCM storage tank by López-Navarro et al [5] showed a much lower heat transfer efficiency after a number of thermal cycling and was attributed to low thermal conductivity of pure PCM and longer storage/discharge time of more than 4 hours. In another study, the melting point of the PCM (Rubitherm-21) shifted from 21 to 28℃ [6] after 120 repeated experimental days which affected its stability for long term usage.…”

Section: Nomenclaturementioning

confidence: 99%

Development of high melting temperature microencapsulated phase change material for compacted thermal energy storage bed

Darkwa

Kokogiannakis

2014

12th International Energy Conversion Engineering Conference

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In this paper a novel high temperature microencapsulated phase change material (MEPCM) based on paraffin as the core material and MF resin as the shell material has been developed with the in-situ polymerization method for solar hot water storage application. The results showed that the type of emulsifier could influence core material content, the encapsulation efficiency as well as the latent heat capacity. Based on the results and analysis the study has shown that energy storage density could be increased by as much as 59% if 60wt% of MEPCM 1 was to be used in the proposed compacted MEPCM-water bed system. In this paper a novel high temperature microencapsulated phase change material (MEPCM) based on paraffin as the core material and MF resin as the shell material has been developed with the in-situ polymerization method for solar hot water storage application. The results showed that the type of emulsifier could influence core material content, the encapsulation efficiency as well as the latent heat capacity. Based on the results and analysis the study has shown that energy storage density could be increased by as much as 59% if 60wt% of MEPCM 1 was to be used in the proposed compacted MEPCM-water bed system. Nomenclature = latent heat of PCM = enthalpy , , = the weight percentage of water, core material and shell material , , = the specific heat of water, core material and shell material , , = the conductivity of water, paraffin and shell material , = the volume percentage of shell material and core material

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Performance characterization of a PCM storage tank

Cited by 93 publications

References 27 publications

Numerical analysis of a shell-and-tube latent heat storage unit with fins for air-conditioning application

Numerical analysis of a shell-and-tube latent heat storage unit with fins for air-conditioning application

Experimental investigations on cylindrical latent heat storage units with sodium acetate trihydrate composites utilizing supercooling

Development of high melting temperature microencapsulated phase change material for compacted thermal energy storage bed

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