Phase change materials designed from Tetra Pak waste and paraffin wax as unique thermal energy storage systems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F23%3A63566978" target="_blank" >RIV/70883521:28110/23:63566978 - isvavai.cz</a>

Alternative codes found

RIV/70883521:28610/23:63566978

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2352152X23005704?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352152X23005704?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.est.2023.107173" target="_blank" >10.1016/j.est.2023.107173</a>

Result language

angličtina

Original language name

Phase change materials designed from Tetra Pak waste and paraffin wax as unique thermal energy storage systems

Original language description

Thermal energy storage systems (TES) based on shape-stabilized phase change materials (SSPCM) designed from recycled Tetra Pak (TP) waste, paraffin wax (PW), and expanded graphite (EG) were investigated in this study. This work represents the first study to explore TP waste composed of low-density polyethylene (LDPE)/ aluminum (Al) components for energy storage applications. The LDPE part serves as a matrix conserving a material in a compact, solid shape after PW melting; PW acts as an active phase change component contributing to heat absorption/release through a phase change (from a solid to a liquid state, and vice versa) of its crystalline phase. EG serves as a filler that enhances the thermal conductivity and mechanical properties of materials.The focus was put on the optimization of the composition of SSPCM including PW, and EG, to check thermal, mechanical, and rheological properties which influence the future processability of such systems through extrusion, as well as to investigate the synergic effect of graphite and residual Al component on thermal con-ductivity and leakage of PW. There are two main demands on polymer/PW blends, namely well-separated melting peaks for both components at significantly different temperatures, and good compatibility between polymer and PW.The best performance of SSPCM investigated in this study was found for a mixture having the composition TP/ PW/EG = 50/40/10 w/w/w. This mixture shows well-balanced properties, including appropriate heat storage and release parameters, thermal conductivity, thermal diffusivity, toughness and strength, and low leakage of PW from the material. This system can store 116.2 J/g of heat energy and release 93.8 J/g of heat energy. The determination of the heat energy storage and release was performed by the transient guarded hot plate tech-nique. Tensile testing revealed that Young&apos;s modulus of the TP/PW/EG = 50/40/10 w/w/w composition was 924 +/- 71 MPa and the stress at break was 8.2 +/- 1.2 MPa, which are sufficient values from the applicability point of view. The composition stability of the prepared system was confirmed by rotational rheometry. The envi-ronmental relevance of these materials lies in the utilization of the waste, which has minimal usage, and after the hydropulping of Tetra Pak packaging, it accumulates in large volumes. This is the first study indicating that LDPE/Al recyclate is a cheap alternative for preparing TES materials, fulfilling all the requirements for such materials. This study indicates the potential of TP waste for the preparation of SSPCM using PW as a phase change component. The selection of PW with a specific melting point determines potential applications, including the building industry, thermal management of electronics, solar vapor generators for desalination, solar water heaters, battery/computer heat protection, etc.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20704 - Energy and fuels

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

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Volume of the periodical

64

Issue of the periodical within the volume

Neuveden

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

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UT code for WoS article

000967831200001

EID of the result in the Scopus database

2-s2.0-85151247245