The main scientific objectives of EFFIHEAT project is to develop and optimize the Stirling engine of novel design for achievement of high performance efficiency by cost-effective means, novel material for regenerator, ensuring (0.01 W/(m•K) thermal conductivity required for operation at low speeds, operation control system enabling optimum and variable engine and overall system work modes. To valid and develop the novel HP technology with the following technology performance to test is the basic technological and perform business case validation for assessment of perspectives for technology and develop the exploitation strategy is the principal non-technical objective. The RTD performers and industrial partners have the relevant skills and expertise in the fields required to implement this project successfully. Their knowledge and experience has been chosen to provide complementarity. The duration of the proposed project is 24 months.