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Concrete-based thermal energy storage tanks for CSP

Objetivo

Europe pathway towards climate neutrality recognises the need for firm, flexible and resilient generation to support a power system with high shares of renewables. At national level, countries with high solar resources such as Spain and Portugal have embedded concentrating solar power (CSP) within their National Energy and Climate Plans as strategic assets to increase the share of renewables and reinforce energy security supply. CSP plants equipped with thermal energy storage (TES) can decouple solar collection from electricity generation, delivering dispatchable renewable power, stable output profiles, and system services aligned with grid needs. However, the deployment potential of CSP is linked to the cost and performance of TES. Molten salt two-tank TES is a mature and proven technology, but its high material costs, construction complexity, and durability-related uncertainty continue to limit cost reduction potential and increase perceived investment risk. CONCRETE4TES aims to address this critical bottleneck in CSP deployment by targeting the TES tank. By replacing state-of-the-art stainless-steel molten salt tanks with a liner-free, innovatively formulated refractory concrete-based solution exhibiting intrinsic impermeability to molten nitrate salts under defined operating conditions, CONCRETE4TES aims to reduce storage CAPEX, limit exposure to volatile high-alloy supply chains, and improve cost predictability, while maintaining equivalent thermal performance and operational behaviour. The project focuses on demonstrating one clearly defined TES concept under realistic operating conditions, generating validated data on performance, losses, durability, and cost drivers. Through this evidence-based approach, CONCRETE4TES directly supports the role of CSP with TES as a dispatchable renewable technology in Europe, strengthens its contribution to renewable energy system integration, and reduces the uncertainty that currently constrains investment and replication.

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Programa(s)

Tema(s)

Régimen de financiación

HORIZON-IA - HORIZON Innovation Actions

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Convocatoria de propuestas

(se abrirá en una nueva ventana) HORIZON-CL5-2026-02

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Coordinador

UNIVERSIDAD DE LLEIDA
Aportación neta de la UEn
€ 2 296 750,00
Dirección
Placa Victor Siurana 1 1
25003 Lleida
España
Región
Este Cataluña Lleida
Tipo de actividad
Higher or Secondary Education Establishments
Enlaces
Coste total
€ 2 296 750,00

Participantes (7)