Estudio numérico de un tubo receptor de un colector cilindro parabólico mediante Fluent

En este trabajo se realiza un estudio termodinámico del tubo receptor de un colector solar cilindro parabólico, mediante el empleo de un modelo tridimensional. Se asume una distribución de radiación sobre el absorbedor no uniforme, y se utiliza el software de simulación “Fluent” para obtener los resultados finales. Para ello se modeliza el receptor del colector solar LS2 y se emplea el aceite térmico Syltherm 800 como fluido de trabajo. Igualmente, se analizan las diferencias de las soluciones obtenidas para otros aceites térmicos, como el Therminol 55, el Therminol VP1 y la sal orgánica Hitec XL, estudiando las diferencias en la temperatura de salida del fluido del receptor. Se obtienen unos resultados satisfactorios que suponen un avance más en esta línea de investigación.The present study investigates the thermodynamic processes in the receiver tube of a parabolic solar collector using a three-dimensional model. A non-uniform solar energy flux distribution is assumed, and the simulation software “Fluent” is used to calculate the final results. With this purpose, LS2 solar collector is modeled and Syltherm 800 oil is employed. Differences in the results obtained for other thermal oils, such as Therminol 55, Therminol VP1, and for the organic salt Hitec XL are also analysed, studying the differences in the outlet temperature of the fluid. Satisfactory results are obtained, what constitutes a step forward in this line of research.Ingeniería en Tecnologías Industriale

Consensus-based management protocol (CREVICE protocol) for the treatment of severe traumatic brain injury based on imaging and clinical examination for use when intracranial pressure monitoring is not employed

Globally, intracranial pressure (ICP) monitoring use in severe traumatic brain injury (sTBI) is inconsistent and susceptible to resource limitations and clinical philosophies. For situations without monitoring, there is no published comprehensive management algorithm specific to identifying and treating suspected intracranial hypertension (SICH) outside of the one ad hoc Imaging and Clinical Examination (ICE) protocol in the Benchmark Evidence from South American Trials: Treatment of Intracranial Pressure (BEST:TRIP) trial. As part of an ongoing National Institutes of Health (NIH)-supported project, a consensus conference involving 43 experienced Latin American Intensivists and Neurosurgeons who routinely care for sTBI patients without ICP monitoring, refined, revised, and augmented the original BEST:TRIP algorithm. Based on BEST:TRIP trial data and pre-meeting polling, 11 issues were targeted for development. We used Delphi-based methodology to codify individual statements and the final algorithm, using a group agreement threshold of 80%. The resulting CREVICE (Consensus REVised ICE) algorithm defines SICH and addresses both general management and specific treatment. SICH treatment modalities are organized into tiers to guide treatment escalation and tapering. Treatment schedules were developed to facilitate targeted management of disease severity. A decision-support model, based on the group's combined practices, is provided to guide this process. This algorithm provides the first comprehensive management algorithm for treating sTBI patients when ICP monitoring is not available. It is intended to provide a framework to guide clinical care and direct future research toward sTBI management. Because of the dearth of relevant literature, it is explicitly consensus based, and is provided solely as a resource (a “consensus-based curbside consult”) to assist in treating sTBI in general intensive care units in resource-limited environments