1. Heat transfer and friction factor analysis of MWCNT nanofluids in double helically coiled tube heat exchanger.
- Author
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Mukesh Kumar, P. C. and Chandrasekar, M.
- Subjects
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NANOFLUIDS , *HEAT exchangers , *HEAT convection , *HEAT transfer , *FACTOR analysis , *LAMINAR flow - Abstract
The convective heat transfer rate and friction factor analysis are determined with the help of a double helically coiled tube heat exchanger by handling multiwall carbon nanotube (MWCNT)/water-based nanofluids as a cooling medium. This experiment was conducted with constant heat flux method and a laminar flow regime in the range of 120–180 L h−1. The 0.2–0.6% volume concentration of MWCNT/water-based nanofluids was prepared by using two-step methods. It is conceived that the MWCNT/water-based nanofluids had produced a higher convective heat transfer compared with water. It is also perceived that heat transfer increases with an increasing volume concentration of MWCNT/water-based nanofluids. Finally, the highest convective heat transfer 35% was recorded at a 0.6% volume concentration of MWCNT/water-based nanofluids at 140 L h−1 flow rate and at 1400 Dean number. It is drawn that the friction factor using MWCNT nanofluids is 40% greater than water with Dean number range 1400–2400. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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