Concrete-based thermal energy storage (CTES) for concentrated solar power plants and built environment
Nghia P. Tran, Tuan Ngo
Abstract
Concrete-based thermal energy storage (CTES) systems present a promising solution for reducing carbon emissions in energy-intensive sectors. This paper presents a comprehensive review of CTES technologies, covering constituent materials, including cementitious and alkali-activated binders, aggregates, fibres, conductive additives, moisture, and phase change materials, and their influence on thermal performance. Key thermal properties such as conductivity, heat capacity, thermal expansion, mass loss, and pore structure evolution under thermal cycling are critically analysed. System-level testing, prototype configurations, and simulation studies are reviewed to evaluate CTES performance. Representative case studies are summarised across building and industrial applications. Finally, the review outlines current challenges, such as heat loss and material degradation, and explores future opportunities in hybrid systems, alternative binders, and improved system integration. This work offers valuable insights to support the design, optimisation, and deployment of sustainable CTES technologies aligned with global net-zero targets by 2050.