Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systems
Nanorefrigerants and nanolubricants have improved refrigeration system productivity. This research theoretically investigates Multi-Walled Carbon nanotubes (MWCNTs) and Copper Oxide (CuO) nanoparticles at volume fractions of 0.5, 1, and 2% in R152a and R134a refrigerants with Polyester (POE) lubrica...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23005804 |
| _version_ | 1797729894023561216 |
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| author | Zafar Said S.M.A. Rahman Maham Aslam Sohail Bibin B S |
| author_facet | Zafar Said S.M.A. Rahman Maham Aslam Sohail Bibin B S |
| author_sort | Zafar Said |
| collection | DOAJ |
| description | Nanorefrigerants and nanolubricants have improved refrigeration system productivity. This research theoretically investigates Multi-Walled Carbon nanotubes (MWCNTs) and Copper Oxide (CuO) nanoparticles at volume fractions of 0.5, 1, and 2% in R152a and R134a refrigerants with Polyester (POE) lubricant. Thermophysical characteristics and COP will be examined. As volume concentration increases, thermal conductivity, density, and viscosity enhance, while specific heat capacity diminishes. However, after the nanoparticle volume concentration surpasses its optimal value, the specific heat capacity declines, potentially resulting in a reduction in cooling capacity. This inverse link suggests that in order to perform at one's best, a balance must be achieved. Despite this, nanorefrigerants and nanolubricant-refrigerants have improved COPs. Nanoparticle thermal conductivity is the main reason. R152a-based nanolubricant-refrigerants have greater COP values than R134a-based ones. R152a-MWCNTs-based nanorefrigerant had a maximum COP increase of 27.63% over R152a.In conclusion, nanorefrigerants made of R152a and Polyester (POE) lubricant are a good refrigeration option. Due to their high performance and environmental friendliness, these materials improve efficiency and energy consumption more than R134a. |
| first_indexed | 2024-03-12T11:36:14Z |
| format | Article |
| id | doaj.art-2f9b801b357148f2b104a0d41802f4f7 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-12T11:36:14Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-2f9b801b357148f2b104a0d41802f4f72023-09-01T05:01:40ZengElsevierCase Studies in Thermal Engineering2214-157X2023-09-0149103274Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systemsZafar Said0S.M.A. Rahman1Maham Aslam Sohail2Bibin B S3Department of Sustainable and Renewable Energy Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates; U.S.-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Islamabad, Pakistan; Department of Industrial and Mechanical Engineering, Lebanese American University (LAU), Byblos, Lebanon; Corresponding author. Department of Sustainable and Renewable Energy Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates.Department of Sustainable and Renewable Energy Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab EmiratesDepartment of Sustainable and Renewable Energy Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab EmiratesDepartment of Thermal and Energy Engineering, School of Mechanical Engineering, Vellore Institute of Technology, Vellore, 632014, IndiaNanorefrigerants and nanolubricants have improved refrigeration system productivity. This research theoretically investigates Multi-Walled Carbon nanotubes (MWCNTs) and Copper Oxide (CuO) nanoparticles at volume fractions of 0.5, 1, and 2% in R152a and R134a refrigerants with Polyester (POE) lubricant. Thermophysical characteristics and COP will be examined. As volume concentration increases, thermal conductivity, density, and viscosity enhance, while specific heat capacity diminishes. However, after the nanoparticle volume concentration surpasses its optimal value, the specific heat capacity declines, potentially resulting in a reduction in cooling capacity. This inverse link suggests that in order to perform at one's best, a balance must be achieved. Despite this, nanorefrigerants and nanolubricant-refrigerants have improved COPs. Nanoparticle thermal conductivity is the main reason. R152a-based nanolubricant-refrigerants have greater COP values than R134a-based ones. R152a-MWCNTs-based nanorefrigerant had a maximum COP increase of 27.63% over R152a.In conclusion, nanorefrigerants made of R152a and Polyester (POE) lubricant are a good refrigeration option. Due to their high performance and environmental friendliness, these materials improve efficiency and energy consumption more than R134a.http://www.sciencedirect.com/science/article/pii/S2214157X23005804NanoparticlesRefrigerantNanorefrigerantThermal conductivityThermophysical propertiesCoefficient of performance (COP) |
| spellingShingle | Zafar Said S.M.A. Rahman Maham Aslam Sohail Bibin B S Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systems Case Studies in Thermal Engineering Nanoparticles Refrigerant Nanorefrigerant Thermal conductivity Thermophysical properties Coefficient of performance (COP) |
| title | Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systems |
| title_full | Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systems |
| title_fullStr | Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systems |
| title_full_unstemmed | Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systems |
| title_short | Analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant-refrigerant mixtures in refrigeration systems |
| title_sort | analysis of thermophysical properties and performance of nanorefrigerants and nanolubricant refrigerant mixtures in refrigeration systems |
| topic | Nanoparticles Refrigerant Nanorefrigerant Thermal conductivity Thermophysical properties Coefficient of performance (COP) |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23005804 |
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