SÁNCHEZ LENCERO , Tomás Manuel

Previous work by the authors has shown that broader analyses than those typically found in literature (in terms of operating pressures allowed) can yield interesting conclusions with respect to the best candidate cycles for certain applications. This has been tested for the thermodynamic performance (first and second laws) but it can also be...

This work presents a comparative analysis of hybrid systems that make use of closed-cycle externally heated bottoming systems. Two options are considered: reciprocating (Stirling) engines and supercritical carbon dioxide turbines. These engines share the common feature of working on closed cycles with optimised fluids (H2 and CO2 respectively)....

The concern about environmental sustainability brought about by global warming in the last decades along with the scarcity of fossil fuel resources has fostered the research in renewable energies, high efficiency power generation systems and carbon dioxide capture and storage opportunities. The present work shows the performance of a system...

Past work by the authors has suggested that Solar micro Gas Turbines (SmGTs) can be used cost-effectively to produce electric power and heat for freshwater production through desalination, mainly in off-grid locations. This is further studied in this work, presenting a detailed description of system performance at design and part-load...

Past work by the authors has suggested that Solar micro Gas Turbines (SmGTs) can be used cost-effectively to produce electric power and heat for freshwater production through desalination, mainly in off-grid locations. This is further studied in this work, providing an exhaustive modelling procedure and methodology. Additionally, a...

En este trabajo se presenta un estudio numérico del flujo meridional en turbomáquinas axiales. Para ello se ha implementado un código numérico que resuelve el flujo meridional tanto a partir de las ecuaciones de equilibrio radial simplificado, como mediante las ecuaciones completas que modelan el flujo meridional, usando la función de...

This paper provides an assessment of the expected Levelised Cost of Electricity enabled by Concentrated Solar Power plants based on Supercritical Carbon Dioxide (sCO2) technology. A global approach is presented, relying on previous results by the authors in order to ascertain whether these innovative power cycles have the potential to achieve...

This paper focuses on the thermodynamic comparison between pure supercritical Carbon Dioxide and blended transcritical Carbon Dioxide power cycles by means of a thorough exergy analysis, considering exergy efficiency, exergy destruction and efficiency losses from Carnot cycle as main figures of merit. A reference power plant based on a steam...

This paper, developed in the context of the SCARABEUS project funded by the Horizon 2020 programme of the European Commission, focuses on the thermodynamic comparison between pure supercritical Carbon Dioxide and blended transcritical Carbon Dioxide power cycles by means of a thorough exergy analysis. A reference power plant based on a steam...

This paper reviews some of the engine research results and available data from HCCI combustion kinetics studies. Homogeneous Charge Compression Ignition (HCCI) combustion has recently emerged as a viable alternative combustion process to the conventional spark ignition or compression ignition process for internal combustion engines, owing too...

This manuscript investigates the supercritical carbon dioxide (sCO2) power cycle employed in the power block of concentrated solar power (CSP) plants—solar tower—as an alternative for solar desalination, developed with either distillation or reverse osmosis. This concept is investigated as a possible up-scaling of the SOLMIDEFF project,...

Este trabajo se centra en la resolución del problema de diseño o problema inverso aplicado al diagrama de distribución de un motor de cuatro tiempos (avance en la apertura y retraso en el cierre de las válvulas de admisión y escape). así como a la geometría de las levas que las accionan. Para este problema de diseño partiremos de un código CFD...

El presente artículo se ocupa de la aplicación de un modelo de inyección de bomba rotativa al diseño de la misma. En éste se detalla un modelo del sistema de inyección, el cual se ha formado a partir del modelado de las diferentes cámaras que constituyen el sistema. Una vez validado el modelo, se desarrolló un método de optimización basado en...

Homogeneous charge compression ignition (HCCI) engines are drawing attracting attention as the next-generation's internal combustion engine, mainly because of its very low NOx and soot emissions and also for improvement in engine efficiency. Much research has been carried out in order to go deeper in this combustion process using multizone...

En este trabajo se muestra un modelo mediante el cual se pretende la caracterización del comportamiento e interacción de un grupo de turbosobrealimentación acoplado a un motor de combustión interna alternativo de cuatro tiempos. El modelo empleado para el grupo de sobrealimentación ha sido desarrollado buscando la compatibilidad del mismo...