Compressed Heat Energy Storage for Energy from Renewable Sources

Project website:

Time period: April 2018 to March 2023

Funder: Horizon 2020 (Grant agreement ID: 764042)

Total budget: 4,999,070 EUR

Short description:

The objective of CHESTER project is to build a standard solution for the CHEST concept by combining high temperature thermal energy storage (HT-TES) and Organic Rankine Cycle units (ORC). The objective is to be achieved through the combination of theoretical modelling and experimental research. However, before a compatible working system can reach the market, multiple tests, experiments and validations must take place. Therefore, the project has the following milestones:

  • Creating conceptual model of the overall energy system;
  • Assessing the integration of CHEST system into the smart boundary conditions of the future energy system will be assessed based on the dynamic simulations. The simulations will produce a comprehensive performance analysis to allow the CHEST system integration into a smart environment (such as changing weather conditions, variable electricity/heat prices, electricity/heat demand profiles, fluctuations of the electric and thermal RES, etc.);
  • Creating the first- of-its-kind laboratory prototype to validate a large part of the theoretically performed research, as for instance the expected performance rates and operational strategies;
  • Integrating CHEST system into a smart energy system to use the energy in a cost-optimal way and provide effective flexibility services to energy operators;
  • Developing innovative business models for the new energy storage and management concept created by the high flexibility that the CHEST concept offers;
  • Establishing a baseline for the exploitation of the CHEST system at short-mid-term to maximize impact on the entire value chain and the society.


  • Tecnalia – SP (co-ordinator)
  • The German Aerospace Center (DLR) – DE
  • IREN – IT
  • University of Stuttgart (USTUTT) – DE
  • PlanEnergi – DK
  • Aiguasol – SP
  • Encontech BV – NL
  • Ghent University (UGent) – BE
  • Universidad Politecnica de Valencia – SP
  • Ulster University (Ulster) – UK
  • PNO Innovation – BE
  • GoiEner – SP