Ossorio-Santiago, RJ.; Navarro-Peris, E.; Barta, RB. (2022). Impact of lubricant in the performance of variable speed heat pumps working with R290. International Journal of Refrigeration. 145:436-445. https://doi.org/10.1016/j.ijrefrig.2022.10.003
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/202858
Title:
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Impact of lubricant in the performance of variable speed heat pumps working with R290
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Secondary Title:
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Impact du lubrifiant sur les performances des pompes à chaleur à vitesse variable fonctionnant au R290
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Author:
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Ossorio-Santiago, Rubén Josep
Navarro-Peris, Emilio
Barta, Riley B.
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UPV Unit:
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Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials
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Issued date:
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Abstract:
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[EN] Modulating the speed of the compressors and adapting its capacity to the required load has led to a decrease in the annual energy consumption in many applications. However, in the compressor, having adequate lubrication ...[+]
[EN] Modulating the speed of the compressors and adapting its capacity to the required load has led to a decrease in the annual energy consumption in many applications. However, in the compressor, having adequate lubrication at low speeds usually implies discharging too much lubricant at higher speeds. Although necessary for compressor operation, lubricating oil acts as a contaminant in the rest of the system. Consequently, manufac- turers have to consider the oil circulation rate (OCR), as it limits the speed range of the compressor. In a previous study, a compressor was tested over its speed range (30 - 110 Hz), working with R290 and POE68 as a lubricant. Experimental data confirm the increase of OCR with speed and suggests that working with R290-POE68 could imply higher OCR values compared to other refrigerant-oil mixtures. In this study, the impact of the OCR in the performance of a R290 heat pump was theoretically assessed. Three contributions were studied: The heat transfer coefficient (HTC) reduction in the evaporator, the effect of refrigerant being solved in oil and finally, and the impact of oil in the compressor. It was found that OCR values of 5% could decrease the coefficient of performance (COP) by more than 20%.
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Subjects:
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OCR
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Heat transfer coefficient
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Solubility
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Oil effect
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Débit de circulation de l¿huile
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Coefficient de transfert de chaleur
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Solubilité
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Effet de l'huile
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Compresseur à spirale
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Propane
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Copyrigths:
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Reconocimiento (by)
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Source:
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International Journal of Refrigeration. (issn:
0140-7007
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DOI:
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10.1016/j.ijrefrig.2022.10.003
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Publisher:
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Elsevier
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Publisher version:
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https://doi.org/10.1016/j.ijrefrig.2022.10.003
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Project ID:
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ENE2017-83665-C2-1-P/ES/MAXIMIZACION DE LA EFICIENCIA Y MINIMIZACION DEL IMPACTO AMBIENTAL DE BOMBAS DE CALOR PARA LA DESCARBONIZACION DE LA CALEFACCION%2FACS EN LOS EDIFICIOS DE CONSUMO CASI NULO/
info:eu-repo/grantAgreement/AEI//PRE2018-083535//AYUDA PARA CONTRATO PREDOCTORAL PARA LA FORMACION DE DOCTORES-OSSORIO SANTIAGO, RUBEN. PROYECTO: MAXIMIZACION DE LA EFICIENCIA Y MINIMIZACION DEL IMPACTO AMBIENTAL DE BOMBAS DE CALOR PARA LA DESCARBONIZACION DE LA CALEFACCION/
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Thanks:
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The authors would like to acknowledge the Spanish ' MINISTERIO DE ECONOMIA Y COMPETITIVIDAD' , through the project ref- ENE2017 - 83665-C2 - 1-P 'Maximización de la eficiencia y minimización del impacto ambiental de bombas ...[+]
The authors would like to acknowledge the Spanish ' MINISTERIO DE ECONOMIA Y COMPETITIVIDAD' , through the project ref- ENE2017 - 83665-C2 - 1-P 'Maximización de la eficiencia y minimización del impacto ambiental de bombas de calor para la descarbonización de la calefacción/acs en los edificios de consumo casi nulo' for the given support. In addition, Ruben Ossorio would like to thank the Spanish government for his PhD scholarship with reference PRE2018 - 083535.
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Type:
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Artículo
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