Publications scientifiques
Oumarou Hamandjoda
Fréderic Lontsi* (Auteur correspondant)
K. F. Djanna
Pascal Stouffs
Energy Science & Engineering
Abstract Externally heated Joule cycle reciprocating engines, also known as Ericsson engines, are particularly suitable for small‐scale solar energy conversion and microcogeneration using biomass or gas effluents at high temperatures. These types of engine have been developed in the context of the current issue of climate change, combined with a progressive depletion of fossil fuels. A dynamic model of a 1.67 kW small open Joule cycle engine has been developed in order to study operational stability and behavioral control, especially during transient phases. Models are implemented on a Matlab/Simulink platform where simulations of the dynamics of engine start‐up and steady conditions are carried out. The optimal settings of valves and the key engine parameters have also been determined. Simulation results reveal a rapid transient phase. Hot starting is achieved in about 5.3 sec and the system is stabilized, with a thermal efficiency of approximately 29%. The system responds well when subjected to selected perturbations.
