INNOvative SOLar micro-TES with high-POWER density (InnoSolPower)

Priority topic: 
Parabolic trough with molten salts
Project summary: 

The InnoSolPower project aims to demonstrate a novel concept of an efficient, low-cost, low temperature, high energy density micro-thermal energy storage (μTES) dedicated to concentrated solar power (CSP) systems. The ultimate goal of the project is to develop, test and validate an efficient TES with a higher than ambient heat pump (HP) heat transfer fluid (HTF) inlet temperature achieved with a solar CSP. The new TES will achieve a large TES storage density, minimum response time, highest roundtrip efficiency and cost viability The objectives of the project will be realised through the following steps:

  1. Selection of high-power density TES material. Proposed HTF is a state of the art, environmentally friendly refrigerant. Water is used as reference TES phase change material (PCM). Final solution is a high power density TES with an optimised HTF and a heat exchanger architecture.
  2. Testing of main subsystems and components. A novel, efficient rotary arc vane compressor for HP is introduced.
  3. Integration of the μTES with a CSP plant at a kW-scale and demonstration in a relevant environment.
  4. Validation of concept in a relevant environment.
  5. Detailed cost reduction analysis and impact analysis in LCOE.

The project starts from a laboratory (TRL 4) level and the consortium brings the product development to TRL 6 or higher. This cost- competitive thermal energy storage product with superior thermal performance and smaller space requirements is expected to capture a significant market share among the small scale electricity productions applications (autonomous consumers, off grid applications, isolated areas).

Pars Makina Ltd. Research and Development
Centre for Renewable Energy Sources and Savings. Solar Thermal Dept
Middle East Technical University Mechanical Engineering Department
Department of Energy, Systems, Territory and Constructions Engineering