Salt-infused sorption mortars for enhancing thermal energy storage in building walls

C. Santini, E. Previti, E. Mastronardo, L. Calabrese, C. Fabiani and A.L. Pisello

Energy, 2025, vol. 332, issue C

Abstract: This study explores the development and evaluation of an innovative thermochemical energy storage mortar using Calcium L-lactate pentahydrate. Designed for improved dehydration and hydration performance, the mortar was characterized to assess its structural, morphological, and thermal properties. The research compares reference samples (A0, B0, C0) with mortars containing 3 % salt (A3, B3, C3), and those with 1 % and 5 % salt (A1, A5), to identify the most effective formulation for thermochemical energy storage. Initially, diffractograms, scanning electron micrographs, and dynamic vapor sorption analyses were examined. Samples then underwent thermal monitoring cycles to assess surface temperature and weight changes. A dynamic Transient Plane Source analysis was conducted to evaluate thermal conductivity during these cycles and to identify endothermic and exothermic reactions. Findings indicate that incorporating 1–3 % salt hydrate significantly enhances mortar heat storage capacity over time. However, surface coatings may hinder performance under dynamic conditions, requiring further investigation at larger scales. This research introduces a novel approach to enhancing thermal energy storage in construction materials through salt hydrate integration. By analyzing the physicochemical and sorption behavior of salt-infused mortars, the study opens pathways toward more energy-efficient building technologies.

Keywords: Energy conservation; Energy efficiency salt hydrate; Calcium L-lactate pentahydrate; Thermo-chemical activation; Sorption mortars; Heat transfer (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225026763
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:332:y:2025:i:c:s0360544225026763

DOI: 10.1016/j.energy.2025.137034

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().