Determination of enthalpy temperature curves of phase change materials with the temperature-history method: improvement to temperature dependent properties

Marı́n, José Marı́a; Zalba, Belén; Cabeza, Luisa F.; Mehling, Harald

doi:10.1088/0957-0233/14/2/305

Cited by 179 publications

(102 citation statements)

References 3 publications

(7 reference statements)

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“…Finally, the heat storage capacity was evaluated as suggested by Marin et al [17] and the results presented as heat released/stored in a given temperature interval as explained in the paper reported by Mehling et al [18] (see Fig. 1).…”

Section: Thermal Characterisationmentioning

confidence: 99%

Experimental and numerical investigations of the optical and thermal aspects of a PCM-glazed unit

Gowreesunker

Stanković

Tassou

et al. 2013

Energy and Buildings

114

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This paper reports on the experimental and numerical analysis of the optical and thermal aspects of PCM (Phase Change Material) RT27 when subjected to an irradiation source of energy. The analysis is separated into the thermal and optical characterisation of the PCM using the T-history method and spectrophotometry principles, respectively, and the experimental and numerical performance evaluation of a PCM-Glazed unit. Various relationships describing the variations in the extinction, scattering and absorption coefficients with respect to the liquid fraction/ temperature within the phase change region were developed from the experimental setup, and were validated in a numerical CFD model. The results show that: i) during rapid phase changes, the transmittance spectra from the PCM are unstable, while under stable conditions a visible transmittance value of 90% and 40% are obtained for the liquid and phases, respectively; ii) the radiation scattering effects are more prominent in the solid phase of the PCM, while radiation absorption dominates in the liquid phase; iii) the optical/ radiation performance of PCM can be successfully modelled using the liquid fraction term as the main variable, in a similar way that the enthalpy porosity method is employed for phase change processes; iv) relative to a standard double glazed unit, the addition of PCM improves the thermal mass of the unit during phase change, but depending on specific

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Section: Thermal Characterisationmentioning

confidence: 99%

Experimental and numerical investigations of the optical and thermal aspects of a PCM-glazed unit

Gowreesunker

Stanković

Tassou

et al. 2013

Energy and Buildings

114

View full text Add to dashboard Cite

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“…Analysis techniques used to study the phase change are mainly conventional calorimetry, differential scanning calorimetry (DSC) and differential thermal analysis (DTA). However, other methods, e.g., the T-history method proposed by J. M. Marín 5 , also found use in PCM tests. For the measurement of the PCM thermal conductivity, the hot-disk method is often used.…”

Section: Introductionmentioning

confidence: 99%

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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“…Among the examples, we first note the possibility of running a DSC in an isothermal (step) mode [1,16], operating much like a relaxation calorimeter [20][21][22][23]. A common method is the so-called T-history method [1,16,[24][25][26], in which a PCM sample is studied in conditions that mimic the operational use of PCMs: its response to a changing environment is recorded. A relatively large PCM sample (for example 20 ml [16] as compared to a DSC sample of few ll) is placed inside a temperature-controlled chamber together with a reference sample.…”

Section: Introductionmentioning

confidence: 99%

A new calorimetric technique for phase change materials and its application to alkane-based PCMs

Duponchel

Longuemart

Glorieux

et al. 2016

Mater Renew Sustain Energy

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The correct determination of the phase transition behaviour of phase change materials (PCMs) is paramount for assessing their application potential. In this work, the merits of a novel calorimetric technique, Peltierelement-based adiabatic scanning calorimetry (pASC), for PCM characterisation are investigated, especially in comparison with the commonly-used differential scanning calorimeter (DSC). A comparative study of two alkanebased PCMs, the commercial mixture RT42 and the pure alkane tricosane (C23) with these two techniques shows that pASC provides data at much higher resolution than DSC, due to its operation in thermodynamic equilibrium. Specifically the rate-dependence and deformation that is inherent to DSC experiments is absent in pASC. In addition, the enthalpy of the PCM is directly obtained. pASC results easily conform to the accuracy limits that are proposed in literature for the transition temperature and storage capacity of PCMs.

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Determination of enthalpy temperature curves of phase change materials with the temperature-history method: improvement to temperature dependent properties

Cited by 179 publications

References 3 publications

Experimental and numerical investigations of the optical and thermal aspects of a PCM-glazed unit

Experimental and numerical investigations of the optical and thermal aspects of a PCM-glazed unit

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

A new calorimetric technique for phase change materials and its application to alkane-based PCMs

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