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Numerical Optimization of an Ejector for Waste Heat Recovery Used to Cool Down the Intake Air in an Internal Combustion Engine

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Numerical Optimization of an Ejector for Waste Heat Recovery Used to Cool Down the Intake Air in an Internal Combustion Engine

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dc.contributor.author Galindo, José es_ES
dc.contributor.author Gil, A. es_ES
dc.contributor.author Dolz, Vicente es_ES
dc.contributor.author Ponce-Mora, Alberto es_ES
dc.date.accessioned 2021-06-15T03:31:15Z
dc.date.available 2021-06-15T03:31:15Z
dc.date.issued 2020-10-01 es_ES
dc.identifier.issn 1948-5085 es_ES
dc.identifier.uri http://hdl.handle.net/10251/167975
dc.description.abstract [EN] In the present paper, a numerical investigation of a jet-ejector is carried out using a real gas model of R1234yf. The prototype under investigation works with specific operating conditions of a jet-ejector refrigeration system intended for waste heat recovery in an internal combustion engine (ICE). In the first instance, the geometry optimization involving nozzle exit diameter, mixing chamber diameter, and nozzle exit position (NXP) is performed. Once the optimum geometry has been obtained, the jet-ejector prototype is tested with different operating pressure ratios to determine its off-design performance. The flow structure in relevant cases has been examined with an emphasis on critical and subcritical modes. The flow phenomena occurring during expansion, entrainment, and mixing processes are discussed so performance degradation can be directly related to physical processes. The analysis has been completed fitting simulated points to critical and subcritical planar surfaces. The results in terms of goodness of fit are satisfactory so the jet-ejector performance in off-design operating conditions can be reflected through simple mathematic models. When the overall cycle is assessed by using previous computational fluid dynamics (CFD) maps, it is observed that the achievable cooling drops significantly when an ambient temperature of 31 degrees C is exceeded. es_ES
dc.description.sponsorship The authors want to acknowledge the institution "Conselleria d'Educacio, Investigacio, Cultura i Esport de la Generalitat Valenciana" and its grant program "Subvenciones para la contratacion de personal investigador de caracter predoctoral" for doctoral studies (ACIF/2018/124). es_ES
dc.language Inglés es_ES
dc.publisher American Society of Mechanical Engineers es_ES
dc.relation.ispartof Journal of Thermal Science and Engineering Applications es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Waste heat recovery es_ES
dc.subject Jet-Ejector cycle es_ES
dc.subject Adiabatic engine es_ES
dc.subject Jet-Ejector optimization es_ES
dc.subject Engine efficiency es_ES
dc.subject R1234yf es_ES
dc.subject Condensation es_ES
dc.subject Energy efficiency es_ES
dc.subject Energy systems es_ES
dc.subject Evaporation es_ES
dc.subject Heat recovery es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Numerical Optimization of an Ejector for Waste Heat Recovery Used to Cool Down the Intake Air in an Internal Combustion Engine es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1115/1.4046906 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GVA//ACIF%2F2018%2F124/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics es_ES
dc.description.bibliographicCitation Galindo, J.; Gil, A.; Dolz, V.; Ponce-Mora, A. (2020). Numerical Optimization of an Ejector for Waste Heat Recovery Used to Cool Down the Intake Air in an Internal Combustion Engine. Journal of Thermal Science and Engineering Applications. 12(5):1-13. https://doi.org/10.1115/1.4046906 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1115/1.4046906 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 13 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 12 es_ES
dc.description.issue 5 es_ES
dc.relation.pasarela S\416573 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
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