Improved latent heat storage properties through mesopore enrichment of a zeolitic shape stabilizer
Artikel i vetenskaplig tidskrift, 2020

Latent heat storage systems are applied to keep temperature of a local environment within a constant range. The process takes place via release/storage of latent heat during freezing/melting of a corresponding phase change material embedded in a shape stabilizer, which is the scaffold keeping the phase change material stationary in its molten form. In this work, a highly siliceous ZSM-5 and modified versions thereof were chosen as shape stabilizers for molecular and polymeric phase change materials (namely lauric acid and polyethylene glycol), to be impregnated using solvent assisted vacuum impregnation. The dominantly microporous analogues, parent ZSM-5 and its acid-treated derivative, were limited to 40% uptake for each phase change material. Contrastingly, a mesopore rich analogue (as formed under basic conditions) reached 65% impregnation for lauric acid and 70% for polyethylene glycol, without any leakage at 70 °C, resulting in latent heats of 106.9 J/g and 118.6 J/g for each composite, respectively. A simple prototypical real-world application demonstrated that the prepared lauric acid and polyethylene glycol composites of mesopore enriched ZSM-5 could maintain their temperatures up to 27% and 22% lower than the ambient environment under solar heating, as well as up to 20% and 26% higher when solar heating stops. The presented findings indicate mesopore enrichment improves phase change material uptake in these low cost, non-toxic zeolitic shape stabilizers, hence making them good candidates as isolation materials to address energy loss during heating/cooling of household environments.

Polyethylene glycol

Latent heat storage

Zeolitic shape stabilizers

ZSM-5

Lauric acid

Desilication

Mesopore enrichment

Författare

Cuneyt Erdinc Tas

Sabanci Universitesi

Oznur Karaoglu

TUBITAK Marmara Research Center

Buket Alkan Tas

Sabanci Universitesi

Erdal Ertas

TUBITAK Marmara Research Center

Hayriye Unal

Sabanci Universitesi

Hakan Bildirir

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Kasper Moth-Poulsen Group

TUBITAK Marmara Research Center

Solar Energy Materials and Solar Cells

0927-0248 (ISSN)

Vol. 216 110677

Ämneskategorier

Polymerkemi

Polymerteknologi

Materialkemi

DOI

10.1016/j.solmat.2020.110677

Mer information

Senast uppdaterat

2020-09-22