Thermal energy storage characterization of cementitious composites made with recycled brick aggregates containing PCM

Mankel, Christoph; Caggiano, António; Koenders, Eduardus

doi:10.1016/j.enbuild.2019.109395

Cited by 45 publications

(22 citation statements)

References 29 publications

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“…For each mixture and/or sample, the complete phase change of the paraffin was always fully occurring, meaning that all PCMs were in their final state at the end of each heating or cooling test. This is also shown in Figure 3 where the center of the spheres at the end of each cooling test has a temperature less than 10 • C and under heating close to 50 • C, while the melting points range between 21-26 • C. For a thorough discussion on the present experimental data, with emphasis on the DSC analyses, conductivity measurements and DKK tests, reference is made to Mankel et al 2019 [28].…”

Section: Thermal-energy Storage Dkk Tests In Spherical Samplesmentioning

confidence: 57%

“…All mixtures were prepared according to EN 196-1 [27]. Recycled bricks (labelled "SB") and high porosity Poroton®fired-clay blocks (labelled "PB") have been considered [28]. These building materials, processed in the form of medium/coarse aggregates and provided by a local company (SHW GmbH, Messel, Germany), were used as carriers (containers) for storing a predefined volume of PCM.…”

Section: Overview Of the Experimental Test Datamentioning

confidence: 99%

“…The thermal conductivity of PCM-RBA mortar mixtures was determined using the Hot-Disk transient plane source method [28]. For this aim, three samples of 150 mm × 150 mm × 80 mm cuboids were tested.…”

Section: Thermal Conductivity Of the Pcm-rba Mortarsmentioning

confidence: 99%

“…From this, the following relation can be derived: For a thorough discussion on the present experimental data, with emphasis on the DSC analyses, conductivity measurements and DKK tests, reference is made to Mankel et al 2019 [28].…”

Section: 1d Spherical-based Solution For the Accmmentioning

confidence: 99%

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Modelling the Thermal Energy Storage of Cementitious Mortars Made with PCM-Recycled Brick Aggregates

et al. 2020

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This paper reports a numerical approach for modelling the thermal behavior and heat accumulation/liberation of sustainable cementitious composites made with Recycled Brick Aggregates (RBAs) employed as carriers for Phase-Change Materials (PCMs). In the framework of the further development of the fixed grid modelling method, classically employed for solving the well-known Stefan problem, an enthalpy-based approach and an apparent calorific capacity method have been proposed and validated. More specifically, the results of an experimental program, following an advanced incorporation and immobilization technique, developed at the Institut für Werkstoffe im Bauwesen for investigating the thermal responses of various combinations of PCM-RBAs, have been considered as the benchmark to calibrate/validate the numerical results. Promising numerical results have been obtained, and temperature simulations showed good agreement with the experimental data of the analyzed mixtures.

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Section: Thermal-energy Storage Dkk Tests In Spherical Samplesmentioning

confidence: 57%

Section: Overview Of the Experimental Test Datamentioning

confidence: 99%

Section: Thermal Conductivity Of the Pcm-rba Mortarsmentioning

confidence: 99%

Section: 1d Spherical-based Solution For the Accmmentioning

confidence: 99%

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Modelling the Thermal Energy Storage of Cementitious Mortars Made with PCM-Recycled Brick Aggregates

et al. 2020

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“…The enthalpy change (at both sensible and latent stage), dH(T), of a sample, can be evaluated by integrating the heat flow registered during the DSC measurements. It can be assumed that a small variation of enthalpy dH (or the specific one, dh) is equal to a small amount of heat dQ (or the specific one, dq) added/released [42,43]. This is valid for those processes characterized at constant pressure, as it happens during DSC experiments.…”

Section: Dynamic Dsc Methods and Evaluation Of Tes Parametersmentioning

confidence: 99%

A Comparative Study on the Thermal Energy Storage Performance of Bio-Based and Paraffin-Based PCMs Using DSC Procedures

et al. 2020

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Thermal-Energy Storage (TES) properties of organic phase change materials have been experimentally investigated and reported in this paper. Three paraffin-based Phase Change Materials (PCMs) and one bio-based PCM are considered with melting temperatures of 24 °C, 25 °C and 26 °C. Sensible heat storage capacities, melting characteristics and latent heat enthalpies of the studied PCMs are investigated through Differential Scanning Calorimetry (DSC) measurements. Two alternative methods, namely the classical dynamic DSC and a stepwise approach, are performed and compared with the aim to eliminate and/or overcome possible measurement errors. In particular, for DSC measurements this could be related to the size of the samples and its representativity, heating rate effects and low thermal conductivity of the PCMs, which may affect the results and possibly cause a loss of objectivity of the measurements. Based on results achieved from this study, clear information can be figured out on how to conduct and characterize paraffin and bio-based PCMs, and how to apply them in TES calculations for building applications and/or simulations. It is observed that both paraffinic and bio-based PCMs possess a comparable TES capacity within the selected phase transition temperature, being representative for the human thermal comfort zone. The phase change of bio-based PCMs occurred over a much narrower temperature range when compared to the wider windows characterizing the paraffin-based materials. Bio-based PCMs turned out to be very suitable for building applications and can be an environmentally friendly substitute for petroleum-based PCMs.

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Thermal energy storage phase change material cement mortar incorporated with clinical waste composites

et al. 2021

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Clinical wastes generated from hospitals and other health care institutions have increased globally, partly because of COVID-19 pandemic. Appropriate handling and disposal of this wastes is important because of their impact on human and environment. One approach is the use this wastes as composite fillers in phase change material (PCM) added into concrete and mortars used in built sector. This study investigates silicon catheter waste (SCW) and latex glove waste (LGW) as fillers mix with PCM cement mortar and evaluates the thermal performance. To determine a viable inclusion method for the cement mortar varying weight (2.5, 5.0, 7.5, and 10.0)% of PCM mixed with SCW and LGW were used as replacement of the composite aggregates. Characterization of the encapsulate PCM cement mortar and thermal analysis under elevated temperatures, compressive strength test, water absorption, porosity, and density was conducted. The microstructural analysis and thermal behavior of the modified specimens after 28 days was tested under dynamic ambient condition. From the result the quality of the cement mortar reduced from excellent to poor as the loading concentration increased from 0 to 10%. The addition of the PCM SCW and PCM LGW to the cement mortar reduced the compressive strength by 38% and 40%, respectively. The density value reduced by 3.2% and 6.8% under elevated temperature and the water absorption increased by 56% and 39%. The morphology of PCM cement mortar mixed with SCW and LGW showed less void spaces with increased homogenous formation.No thermal decomposition was observed in the PCM cement mortar with the addition of the SCW and LGW at elevated temperatures. The SCW and LGW fillers increased the thermal conductivity of the PCM mortar by 14% and 18%, and prolonged the surface temperature by 5 hours by an average of 5 C and 7 C, respectively. In addition, the SCW and LGW fillers mixed with PCM cement mortar was found to enhance the thermal performance by 65% compared with the typical cement mortar. There are huge potential on their application in building and construction industry.

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Thermal energy storage characterization of cementitious composites made with recycled brick aggregates containing PCM

Cited by 45 publications

References 29 publications

Modelling the Thermal Energy Storage of Cementitious Mortars Made with PCM-Recycled Brick Aggregates

Modelling the Thermal Energy Storage of Cementitious Mortars Made with PCM-Recycled Brick Aggregates

A Comparative Study on the Thermal Energy Storage Performance of Bio-Based and Paraffin-Based PCMs Using DSC Procedures

Thermal energy storage phase change material cement mortar incorporated with clinical waste composites

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