Projets de l'opération Exergie

Applications of Stirling engine in sustainable development context. Numerical & experimental study

Doctorant : Ruijie Li 
Directeurs de thèse : Lavinia GROSU et Diogo QUEIROS-CONDE

Conversion of solar energy into electricity is a major challenge to overcome fossil energy dependency. Stirling engines have big potential for that issue with many advantages: high efficiency, low pollution, silent, adaptable, use of various hot resources (combustion, solar energy, recovery energy, etc).

Two Stirling engines are considered in this thesis to improve their performance: (1) A low temperature-difference Gamma type Stirling engine powered by a water circuit heated in a solar panel. (2) An alpha type Stirling engine powered by external combustion gas which is simultaneously used for electricity and heat generation - application of the micro-cogeneration.

Two thermodynamic approaches will be developed: Finite Physical Dimensions Thermodynamics (under engineering constrains such as maximum pressure, temperature and volume and finite heat transfer on the heat exchangers) and Zero-Dimensional analysis in steady state (takes into account the kinematics of the pistons, and more irreversibilities as the previous model).

Both approaches will be supplemented with exergy analyses, in order to take into account the diversity of resources (at different temperature levels), the trade, production and distribution globalization. This study will be developed in parallel with an entropic analysis to quantify the losses in terms of power introduced by each considered imperfection (imperfect regeneration, temperature pinch, leakage etc).

Mis à jour le 26 novembre 2014