No abstract

The Stirling engine is a simple type of external-combustion engine with an external combustion engine based on cyclic compression and expansion of gas at different temperature levels. It has high efficiency; low vibration levels, simple structure and can run on any combustible fuels. It has been the object of numerous studies. This paper presents an analysis of a Stirling engine model GENOA 03 for electric power generation, of 3 KW of nominal power with pressurized air as working fluid, currently under development. To improve its performance and ensure a good operational reliability, it is necessary to carry out a modelling of the engine in all its operating range. This requires complex numerical models that simulate the behaviour of any element of the engine in a cycle. Two typologies of thermodynamic models are developed in this work: isothermal and adiabatic. The main benefits and shortcomings of each model are mentioned. The geometry and conditions of the engine have been adapted through the Matlab ® tool, in order to obtain the operative conditions of the cooler that you want to replace, as well as an approximation to the expected behaviour.

Este artículo analiza la adecuación del nuevo ecosistema radiofónico conceptualizado como metarradio al desarrollo de los contenidos curriculares en la enseñanza reglada de educación primaria. El análisis se realiza a partir de un programa radiofónico con la intervención de los escolares, desarrollado en cinco fases diferentes y donde se han formulado una serie de variables para la evaluación de los diferentes elementos estudiados. Los resultados señalan que esta iniciativa resulta bastante adecuada para la consecución de los estándares de aprendizaje evaluados y también favorece el conocimiento de la configuración del nuevo ecosistema mediático.