Improved measurement technique for the characterization of organic and inorganic phase change materials using the T-history method

Stanković, Stanislava B.; Kyriacou, Panayiotis A.

doi:10.1016/j.apenergy.2013.01.079

Cited by 38 publications

(13 citation statements)

References 19 publications

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“…It is possible to see the supercooling limited to 2-3 °C and the repeatability of the cycles. As reported in the literatures [10][11][12][13] The thermal properties of the first sample, estimated by considering the method described in Section 2.2, are summarized in Table 4.…”

Section: Thermal Analysis Of the Samplesmentioning

confidence: 82%

“…As reported in the literatures [10][11][12], cooling curves were used for the evaluation of ∆H. The results are therefore presented with reference to the method of Marin et al [12], in which in addition to the enthalpy of fusion, the representation of the enthalpy-temperature trend is shown in the examined range.…”

Section: Thermal Analysis: T-history Methodsmentioning

confidence: 99%

“…The thermal analysis was carried out by using the T-history method [10] in the temperature range from 10 • C to 40 • C. The original setup has been improved by using a refrigerated thermostat FOC 215 l from Velp Scientifica, (Usmate Velate (Monza Brianza), Italy)), as also suggested by Stankovic et al [11], coupled in our case with the Software TEMPSoft™ supplied from Velp Scientifica, (Usmate Velate (Monza Brianza), Italy)) to program the heating and cooling ramps continuously, in order to obtain an adequate control of the environmental conditions, following the assigned function.…”

Section: Thermal Analysis: T-history Methodsmentioning

confidence: 99%

“…It is possible to see the supercooling limited to 2-3 • C and the repeatability of the cycles. As reported in the literatures [10][11][12][13], cooling curves have been used for the second part of the method, then by considering the cooling curves and Equation (3), the enthalpy versus temperature curves were determined for all the samples. The results obtained for sample C1 are shown in Figure 3.…”

Section: Thermal Analysis Of the Samplesmentioning

confidence: 99%

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Thermal and Stability Investigation of Phase Change Material Dispersions for Thermal Energy Storage by T-History and Optical Methods

et al. 2017

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Glauber's salt (sodium sulphate decahydrate) is a promising phase change material (PCM) for use in the building sector, thanks to its high enthalpy of fusion associated with a proper phase transition temperature. It also offers economic and environmental advantages because it can be obtained as a byproduct from the disposal process of lead batteries. However, due to phenomena of phase segregation and supercooling, Glauber's salt cannot be used in its pure state and requires the addition of rheological modifiers and nucleating agents. In this work, the initial thermal performances of mixtures based on Glauber's salt with different compositions are compared by using the T-history method and adopting sonication for mixing, and following the same preparation procedure for all the samples. With fixed composition, the effects of the addition sequence of the reagents are also examined. The analysis carried out by optical methods based on light scattering (Turbiscan equipment) allowed us to identify the kinetics of destabilization for each sample and revealed the need to specify in detail the preparation stages of PCMs, in order to make the composition reproducible in the laboratory and on a wider scale.

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Section: Thermal Analysis Of the Samplesmentioning

confidence: 82%

Section: Thermal Analysis: T-history Methodsmentioning

confidence: 99%

Section: Thermal Analysis: T-history Methodsmentioning

confidence: 99%

Section: Thermal Analysis Of the Samplesmentioning

confidence: 99%

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Thermal and Stability Investigation of Phase Change Material Dispersions for Thermal Energy Storage by T-History and Optical Methods

et al. 2017

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“…Several contributions were proposed to improve its mathematical model [7,8], its measuring process [9,10] or both [11]. A horizontal setup was also found to reduce the discrepancies between freezing and melting enthalpy-temperature curves [1].…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Thermal Properties of PCMs through Inverse Modelling

Cascone

Perino

2015

Energy Procedia

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Even though the use of Phase Change Materials (PCMs) is promising to improve the energy efficiency of buildings, their application in the building sector is still very limited. One of the obstacles to the diffusion of PCMs is the lack of information regarding their thermo-physical properties. A method for estimating the specific heat-temperature curve of a PCM through inverse modelling is herewith presented. This method combined experimental data with a numerical tool able to simulate multilayer walls with the inclusion of PCM materials. Results were validated against tests on different samples and discussed in comparison with a low-speed DSC measurement.

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Development of a new methodology for validating thermal storage media: Application to phase change materials

Bayón

Rojas

2019

Int J Energy Res

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Summary Long‐term stability and long‐term performance of thermal storage media are a key issue that should be thoroughly analysed when developing storage systems. However, no testing protocol or guideline exists up to now for validating storage media, so that authors apply their own criteria, not only for designing testing procedures but also for predicting the material behaviour under long‐term operation. This paper aims to cover this gap by proposing a methodology for validating thermal storage media; in particular, phase change materials (PCMs). This methodology consists of different stages that include PCM characterization, preliminary assessment tests, and accelerated life testing. For designing the accelerated life tests, lifetime relationship models have to be obtained in order to predict PCM long‐term behaviour under service conditions from shorter tests performed under stress conditions. The approach followed in this methodology will be valid for materials to be used as sensible or thermochemical storage media, too.

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Improved measurement technique for the characterization of organic and inorganic phase change materials using the T-history method

Cited by 38 publications

References 19 publications

Thermal and Stability Investigation of Phase Change Material Dispersions for Thermal Energy Storage by T-History and Optical Methods

Thermal and Stability Investigation of Phase Change Material Dispersions for Thermal Energy Storage by T-History and Optical Methods

Estimation of the Thermal Properties of PCMs through Inverse Modelling

Development of a new methodology for validating thermal storage media: Application to phase change materials

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