Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.]
Conventional fluids have lower thermal properties. Moreover, the low freezing and high boiling point of water are another issues have made limitation occurred. Therefore, inclusion of MWCNT-OH nanoparticles in mixture of ethylene glycol and deionized water is an alternative way to solve these proble...
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| Format: | Article |
| Language: | English |
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Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM)
2018
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| Online Access: | https://ir.uitm.edu.my/id/eprint/36325/1/36325.pdf |
| _version_ | 1825738281704226816 |
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| author | Abdullah*,, Amirah Mohamad,, Imran Syakir Masripan,, Nor Azmmi Zainal Abidin, Syazwani Bani Hashim, Ahmad Yusairi |
| author_facet | Abdullah*,, Amirah Mohamad,, Imran Syakir Masripan,, Nor Azmmi Zainal Abidin, Syazwani Bani Hashim, Ahmad Yusairi |
| author_sort | Abdullah*,, Amirah |
| collection | UITM |
| description | Conventional fluids have lower thermal properties. Moreover, the low freezing and high boiling point of water are another issues have made limitation occurred. Therefore, inclusion of MWCNT-OH nanoparticles in mixture of ethylene glycol and deionized water is an alternative way to solve these problems. Then, two-step method is used in nanofluids synthesizing through homogenized and sonicated all materials together such as MWCNT-OH nanoparticles (0.1 wt% to 1.0 wt%) and PVP surfactant (0.01 wt%) in mixture of ethylene glycol to deionized water (20:80) for five minutes. The nanofluids were tested in thermal conductivity test, heat transfer coefficient test and specific heat test. Thus, the thermal conductivity results show positive enhancement for all concentrations and 0.9 wt% of MWCNT-OH based nanofluids have the highest thermal conductivity. It is followed by 0.3 wt% and 0.6 wt% of MWCNT-OH based nanofluids. The percentage enhancement of thermal conductivity is about 0.812% to 17.0%. Whilst, high heat transfer coefficient has given increment of nanofluids Nusselt number. However, specific heat test have decrement values with increment of weight loading even though has high thermal conductivity values. This thermal properties results are affected by dispersion and suspensions of nanoparticles possess higher thermal conductivity. In addition, functionalized group attached on nanoparticles, quantity of surfactant, ultrasonication process and nanofluids stability are factors which influenced the thermal conductivity. Moreover, heat absorption and capacity of nanofluids and as well as temperature are another factors that capable to enhance the thermal conductivity. The small size and high surface area of nanoparticles, low surface roughness, nanoparticles concentration, temperature and nanoparticles interaction are others influenced factors in these test. Whilst, lower specific heat value on nanoparticles and agglomeration form affected in specific heat test. In conclusion, addition of MWCNT-OH nanoparticles in mixture of base fluids is capable to improve thermal properties of nanofluids. |
| first_indexed | 2024-03-06T02:31:10Z |
| format | Article |
| id | oai:ir.uitm.edu.my:36325 |
| institution | Universiti Teknologi MARA |
| language | English |
| last_indexed | 2024-03-06T02:31:10Z |
| publishDate | 2018 |
| publisher | Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) |
| record_format | dspace |
| spelling | oai:ir.uitm.edu.my:363252020-11-09T03:36:47Z https://ir.uitm.edu.my/id/eprint/36325/ Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.] jmeche Abdullah*,, Amirah Mohamad,, Imran Syakir Masripan,, Nor Azmmi Zainal Abidin, Syazwani Bani Hashim, Ahmad Yusairi TJ Mechanical engineering and machinery Conventional fluids have lower thermal properties. Moreover, the low freezing and high boiling point of water are another issues have made limitation occurred. Therefore, inclusion of MWCNT-OH nanoparticles in mixture of ethylene glycol and deionized water is an alternative way to solve these problems. Then, two-step method is used in nanofluids synthesizing through homogenized and sonicated all materials together such as MWCNT-OH nanoparticles (0.1 wt% to 1.0 wt%) and PVP surfactant (0.01 wt%) in mixture of ethylene glycol to deionized water (20:80) for five minutes. The nanofluids were tested in thermal conductivity test, heat transfer coefficient test and specific heat test. Thus, the thermal conductivity results show positive enhancement for all concentrations and 0.9 wt% of MWCNT-OH based nanofluids have the highest thermal conductivity. It is followed by 0.3 wt% and 0.6 wt% of MWCNT-OH based nanofluids. The percentage enhancement of thermal conductivity is about 0.812% to 17.0%. Whilst, high heat transfer coefficient has given increment of nanofluids Nusselt number. However, specific heat test have decrement values with increment of weight loading even though has high thermal conductivity values. This thermal properties results are affected by dispersion and suspensions of nanoparticles possess higher thermal conductivity. In addition, functionalized group attached on nanoparticles, quantity of surfactant, ultrasonication process and nanofluids stability are factors which influenced the thermal conductivity. Moreover, heat absorption and capacity of nanofluids and as well as temperature are another factors that capable to enhance the thermal conductivity. The small size and high surface area of nanoparticles, low surface roughness, nanoparticles concentration, temperature and nanoparticles interaction are others influenced factors in these test. Whilst, lower specific heat value on nanoparticles and agglomeration form affected in specific heat test. In conclusion, addition of MWCNT-OH nanoparticles in mixture of base fluids is capable to improve thermal properties of nanofluids. Faculty of Mechanical Engineering Universiti Teknologi MARA (UiTM) 2018 Article PeerReviewed text en https://ir.uitm.edu.my/id/eprint/36325/1/36325.pdf Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.]. (2018) Journal of Mechanical Engineering (JMechE) <https://ir.uitm.edu.my/view/publication/Journal_of_Mechanical_Engineering_=28JMechE=29/>, 15 (2). pp. 53-71. ISSN 1823-5514 ; 2550-164X https://jmeche.uitm.edu.my/ |
| spellingShingle | TJ Mechanical engineering and machinery Abdullah*,, Amirah Mohamad,, Imran Syakir Masripan,, Nor Azmmi Zainal Abidin, Syazwani Bani Hashim, Ahmad Yusairi Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.] |
| title | Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.] |
| title_full | Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.] |
| title_fullStr | Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.] |
| title_full_unstemmed | Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.] |
| title_short | Thermal properties characteristics of MWCNT-OH based Nanofluids in mixture of Ethylene Glycol and Deionized water / Amirah Abdullah...[et al.] |
| title_sort | thermal properties characteristics of mwcnt oh based nanofluids in mixture of ethylene glycol and deionized water amirah abdullah et al |
| topic | TJ Mechanical engineering and machinery |
| url | https://ir.uitm.edu.my/id/eprint/36325/1/36325.pdf |
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