Influence Of Low Concentration Diamond-Water Nanofluid On Heat Transfer In Loop Heat Pipe
An experimental works were conducted to investigate the heat transfer characteristics by using low concentrations of diamond-water, which was less than 1% in Loop Heat Pipe (LHP) in this thesis. The nanofluid consists of three types of mass concentration which is 0.3%, 0.6% and 0.9%. This study o...
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| Format: | Thesis |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://eprints.usm.my/47361/1/Influence%20Of%20Low%20Concentration%20Diamond-Water%20Nanofluid%20On%20Heat%20Transfer%20In%20Loop%20Heat%20Pipe.pdf http://eprints.usm.my/47361/ |
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| Summary: | An experimental works were conducted to investigate the heat transfer
characteristics by using low concentrations of diamond-water, which was less than
1% in Loop Heat Pipe (LHP) in this thesis. The nanofluid consists of three types of
mass concentration which is 0.3%, 0.6% and 0.9%. This study on LHP with low
concentration of nanofluid were divided into three condition changes for the entire of
study, which was flow rate changes, different heat load applied and different working
fluid. For the effect of working fluid flow rate, the optimum flow rate to gain the
lowest total thermal resistance of LHP was 7.5ml /min from the setting of 5ml /min
to 10ml /min. The evaporator heat transfer coefficient also observes increase 16.7%
for 0.9% diamond-water than pure water at flow rate 7.5m l /min. In term of
influence of heat load to LHP, higher heat load 60W provides lower total thermal
resistance of LHP. Same goes to heat transfer coefficient improve about 10.95% for
mass concentration 0.9% diamond-water compared with water. On the effect of
different nanofluid towards total thermal resistance, a comparison study between
silica-water and diamond-water at mass concentration of 0.6% would be covered in
the present experiment. Nevertheless, the diamond-water nanofluid has lower total
thermal resistance of LHP than silica-water nanofluid. In the mean time, the
experimental results were compared with ANSYS simulation and both were found to
be in good agreement. Thus, there is a potential for low concentration of diamondwater
nanofluid to be utilized as working fluid, in terms of high thermal conductivity. |
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