Thermo-physical characterization of some paraffins used as phase change materials for thermal energy storage

Anghel, Elena Maria; Georgiev, Anton; Petrescu, Simona; Popov, Rumen; Constantinescu, M.

doi:10.1007/s10973-014-3775-6

Cited by 52 publications

(18 citation statements)

References 32 publications

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“…For lower temperatures, for example 10°C, the measured specific-heat capacity dropped and reached values of 1.4-2.6 J/g K. Similar results for paraffin E 53 were reported by E. M. Anghel et al 24 who obtained, at 10°C, a specific heat capacity of 1.6 J/g K. Similarly, D. Zhou et al 25 reported on the specific-heat capacity of Rubitherm 25 that was 2.1 J/g K.…”

Section: Resultssupporting

confidence: 86%

Effect of the mode and dynamics of thermal processes on DSC-acquired phase-change temperature and latent heat of different kinds of PCM

Fořt¹,

Pavlík²,

Trník³

et al. 2017

Mater. Tehnol.

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Thermal-energy-storage systems utilizing phase-change materials (PCMs) can find use in many fields, such as solar-energy storage, waste-heat recovery or smart air conditioning in buildings. However, their incorporation into certain building elements and possible utilization of thermal energy are related to the proper understanding of phase-change processes. In this paper, thermophysical properties of five different PCMs were characterised in order to find suitable materials for incorporation into lightweight plasters capable of moderating the interior microclimate of buildings. A DSC analysis as the main investigation method was applied in the range of -10°C to 55°C, with the heating/cooling rates of (1, 5, 10 and 20)°C /min. Based on the DSC data, the temperatures and enthalpies of the phase change were determined as functions of both the modes and dynamics of the simulated thermal process. The obtained results were discussed and proper PCM candidates for an application in lightweight interior plasters were identified. Keywords: phase-change materials, differential scanning calorimetry, phase-change temperature Sistemi za skladi{~enje toplotne energije, ki izkori{~ajo fazne spremembe v materialih (angl. PCMs; Phase Change Materials), se uporabljajo na mnogih podro~jih, kot na primer pri pridobivanju in skladi{~enju son~ne energije, izkori{~anju odpadne toplote, ali v inteligentnih prezra~evalnih sistemih stavb. Kakorkoli, njihova vgradnja v dolo~ene gradbene elemente in mo`no izkori{~anje odpadne toplote, je povezana z ustreznim razumevanjem faznih sprememb. V tem prispevku so bile dolo~ene termo-fizikalne lastnosti petih razli~nih PC materialov, da bi na{li ustrezne materiale za vklju~itev v lahke omete, ki bi bili sposobni uravnavati notranjo mikroklimo stavb. Kot glavna preiskovalna metoda je bila uporabljena DSC (diferencialna vrsti~na kalorimetrija) analiza v temperaturnem obmo~ju med -10°C in 55°C, s hitrostjo ogrevanja/hlajenja (1, 5, 10 in 20)°C/min. Glede na podatke DSC-analize, so bile dolo~ene temperature in entalpije faznih sprememb v odvisnosti od obeh na~inov in dinamike simuliranega termi~nega procesa. Dobljeni rezultati so bili pre{tudirani in najdeni so bili ustrezni PCM-materiali za uporabo v lahkih notranjih ometih. Klju~ne besede: materiali s faznimi spremembami, diferen~na dinami~na kalorimetrija, temperatura fazne spremembe

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Section: Resultssupporting

confidence: 86%

Effect of the mode and dynamics of thermal processes on DSC-acquired phase-change temperature and latent heat of different kinds of PCM

Fořt¹,

Pavlík²,

Trník³

et al. 2017

Mater. Tehnol.

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“…(1). This approach is commonly implemented in the analysis of overlapping DSC peaks in drugs (Elsabee & Prankerd, 1992), paraffins (Anghel, Georgiev, Petrescu, Popov, & Constantinescu, 2014) and polymer composites characterization (Tatini et al, 2015). The fitting procedure provides the two T 0 values corresponding to the centers of the two Gaussian curves used for the deconvolution.…”

Section: Thermal Behaviormentioning

confidence: 99%

Specific ion effects in polysaccharide dispersions

Tatini

Sarri

Maltoni

et al. 2017

Carbohydrate Polymers

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The specific effects induced by some strong electrolytes or neutral cosolutes on aqueous mixtures of guar gum (GG), sodium alginate (SA) and sodium hyaluronate (SH) were studied through rheology and DSC experiments. The results are discussed in terms of changes in the polymer conformation, structure of the network and hydration properties. This study is also aimed at controlling the viscosity of the aqueous mixturesfor application in green formulations to be used as fracturing fluids for shale gas extraction plants.

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“…Anghel et al [9] discussed the structural and molecular variation of three PCM and two commercial types of paraffin wax like E53 and E46 and the result identified the specific applications of individual PCM with their two phase transition analysis method. Vivekanandan et al [10] conducted analysis of using ANSYS on temperature distribution.…”

Section: Literature Reviewmentioning

confidence: 99%

Calorimetric investigation of magnesium nitrate hexahydrate and sodium thiosulphate pentahydrate as salt mixture encapsulated materials for thermal energy storage

Rajamani¹,

Balasubramaniam²,

Radhakrishnan³

2020

THERM SCI

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Original scientific paper https://doi.org/10.2298/TSCI190602456RThe use of magnesium nitrate hexahydrate and sodium thiosulphate pentahydrate salt composite as an encapsulated phase change material in solar water heater storage unit for thermal energy storage was experimentally tested and investigated in this research study. A differential scanning calorimetry is performed to determine the properties such as melting temperature, specific heat capacity, and latent heat of the selected mixtures for the proportion 70:30 and 80:20 by weight. For the experimentation, these two samples are stored separately in the aluminum canisters and filled in storage tank to avoid the heat loss directly. The thermal performance of the solar water heater at different zones on collector with and without using encapsulated phase change material in storage tank was tested experimentally. Maximum temperature achieved in solar water collector was 50 °C at midpoint and 46 °C at outlet of the tank. It is found that even after late evenings 18.00 IST, the average storage tank temperature with phase change material was found to be nearly 2.6 to 3.2 times greater than conventional solar water heater and the average temperature of phase change material is 42 °C. The test results shows that sample B 80:20 will produces higher amount of hot water and stores the maximum heat compared to sample A 70:30. The results demonstrate that this encapsulated phase change material cylinder stores higher latent heat of fusion and, it can also be used for indirect solar cooking and other low temperature application even at late evenings.

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Thermo-physical characterization of some paraffins used as phase change materials for thermal energy storage

Cited by 52 publications

References 32 publications

Effect of the mode and dynamics of thermal processes on DSC-acquired phase-change temperature and latent heat of different kinds of PCM

Effect of the mode and dynamics of thermal processes on DSC-acquired phase-change temperature and latent heat of different kinds of PCM

Specific ion effects in polysaccharide dispersions

Calorimetric investigation of magnesium nitrate hexahydrate and sodium thiosulphate pentahydrate as salt mixture encapsulated materials for thermal energy storage

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