Novel compound waste heat-solar driven ejector-compression heat pump for simultaneous cooling and heating using environmentally friendly refrigerants
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Otros documentos de la autoría: Al-Sayyab, Ali; Mota-Babiloni, Adrián; Navarro-Esbrí, Joaquín
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Título
Novel compound waste heat-solar driven ejector-compression heat pump for simultaneous cooling and heating using environmentally friendly refrigerantsFecha de publicación
2021-01-15Editor
ElsevierISSN
0196-8904Cita bibliográfica
AL-SAYYAB, Ali Khalid Shaker; MOTA-BABILONI, Adrián; NAVARRO-ESBRÍ, Joaquín. Novel compound waste heat-solar driven ejector-compression heat pump for simultaneous cooling and heating using environmentally friendly refrigerants. Energy Conversion and Management, 228: 113703Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/acceptedVersionPalabras clave / Materias
Resumen
This work investigates the theoretical performance of a novel compound waste heat-solar driven ejector-solar
assisted heat pump for simultaneous heating and cooling purposes. The system utilizes waste heat from ... [+]
This work investigates the theoretical performance of a novel compound waste heat-solar driven ejector-solar
assisted heat pump for simultaneous heating and cooling purposes. The system utilizes waste heat from three
different sources, PV/T (photovoltaic thermal) with flat plate collector, milk pasteurization process, and
condenser exchange heat. Real weather data is employed to determine the hourly performance of the system in
three European cities, Valencia (Spain), Berlin (Germany), and Stockholm (Sweden) representing warm, middle
and cold climates, respectively. Moreover, R450A and R513A alternative refrigerants are compared to the
greenhouse gas R134a. The results show that the proposed system improves cooling COP by 7% using R450A in
comparison with a conventional R134a vapor compression system. Furthermore, the utilization of waste heat
recovery enhances the system COP from 3.7 to 4 in the absence of solar intensity. On the other hand, the results
of the heating mode show that the system with PV/T and using R450A has a COP increase over the adopted solar
time, ranging from 2 to 5% in Valencia; 2 to 2.5% in Berlin, and1 to 1.5% in Stockholm. However, R513A shows
a COP reduction of about 5% in comparison to R134a. Regarding the heating mode with waste heat utilization
from milk pasteurization, the system based on R450A results in the highest system COP, increasing COP up to
75% compared to the R134a baseline scenario. Overall, the proposed R450A systems show the highest equivalent
carbon dioxide emission reduction and, therefore, it is recommended from an environmental point of view. [-]
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Energy Conversion and Management, 228: 113703Derechos de acceso
© 2020 Elsevier Ltd. All rights reserved.
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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