Alternative blends of CO2 for transcritical refrigeration systems. Experimental approach and energy analysis
![Thumbnail](/xmlui/bitstream/handle/10234/202586/2023_Sanchez_Alternative.pdf.jpg?sequence=5&isAllowed=y)
View/ Open
Impact
![Google Scholar](/xmlui/themes/Mirage2/images/uji/logo_google.png)
![Microsoft Academico](/xmlui/themes/Mirage2/images/uji/logo_microsoft.png)
Metadata
Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
comunitat-uji-handle4:
INVESTIGACIONMetadata
Title
Alternative blends of CO2 for transcritical refrigeration systems. Experimental approach and energy analysisAuthor (s)
Date
2023-02-10Publisher
ElsevierBibliographic citation
SÁNCHEZ, D., et al. Alternative blends of CO2 for transcritical refrigeration systems. Experimental approach and energy analysis. Energy Conversion and Management, 2023, vol. 279, p. 116690.Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
As a natural refrigerant, Carbon Dioxide (CO2) has been extended in almost all refrigeration fields due to its environmental friendliness, high availability, and high technological development in the main components ... [+]
As a natural refrigerant, Carbon Dioxide (CO2) has been extended in almost all refrigeration fields due to its environmental friendliness, high availability, and high technological development in the main components of the cycle. However, despite the benefits, CO2 is limited to high-capacity applications due to the cost of components and the complex cycle arrangements to overcome the low coefficient of performance (COP) at high ambient temperatures. A simple but effective method to solve this issue involves mixing CO2 with other refrigerants obtaining a new refrigerant mixture with higher critical points, lower working pressures and low global warming potential (GWP). Depending on the mixture percentage, the mixture flammability can be suppressed, and the performance of the refrigeration plant can be increased.
Building on this, this work determines theoretically different CO2based zeotropic blends as an alternative to pure CO2 with the restrictions of non-flammability, GWP below 150 and higher COP than pure CO2. The results suggest two blends of CO2/R1270 and CO2/R32 that have been prepared and energetically tested in a vertical display cooler using pure CO2 as a reference. The results revealed that CO2-blends reduce energy consumption by up to 17.2 % at the ambient temperature of 25 °C and up to 12.2 % at 30 °C. Moreover, the results with CO2-blends were closest to those obtained with pure R1270 and better than R134a under the same operating conditions. [-]
Is part of
Energy Conversion and Management, 2023, vol. 279Funder Name
Ministerio de Ciencia, Innovación y Universidades (Spain) | MCIN/AEI/10.13039/501100011033 | European Union - NextGenerationEU “NextGenerationEU”/PRTR | Universitat Jaume I
Project code
PID2021-126926OB-C21 | PRE2019-091617 | TED2021-130162B-I00 | UJI-B2021-10
Rights
info:eu-repo/semantics/openAccess
This item appears in the folowing collection(s)
- EMC_Articles [828]