Research articles
ScienceAsia 50 (2024):ID 2024017 1-6 |doi:
10.2306/scienceasia1513-1874.2024.017
Investigation on sensitivity of photo-thermal conversion
efficiency of an enclosed type evacuated U-tube solar collector
using Fe3O4-MWCNT/water hybrid nanofluid
Shifeng Wanga, Yijie Tongb,*
ABSTRACT: The thermal performance of an enclosed type evacuated U-tube solar collector (EEUSC) was investigated
experimentally using Fe3O4
-multi-walled carbon nanotube (MWCNT)/water hybrid nanofluid with various proportions
of Fe3O4
and MWCNT nanoparticles. The sensitivity of thermal performance and photo-thermal conversion efficiency
was analyzed under different operating conditions. The maximum efficiency of the EEUSC was 80.1% when
hybrid nanofluid with 80 wt% MWCNT and 20 wt% Fe3O4
nanoparticles (weight ratio = 8 : 2) was applied, which
corresponded to 15.5% and 25.6% improvement compared to Fe3O4
nanofluid and water, respectively. In addition, the
efficiency of EEUSC was increased by 10.1% when the flow rate of the working fluid was increased from 0.036 kg/s
to 0.054 kg/s. The experimental results demonstrated that adding MWCNT nanoparticles into Fe3O4
nanofluid was an
effective way to enhance the sensitivity of thermal performance of the EEUSC.
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| a |
Institute of Academic Research, Hangzhou Vocational and Technical College, Hangzhou 310018 China |
| b |
Fair Friend Institute of Intelligent Manufacturing, Hangzhou Vocational and Technical College, Hangzhou 310018
China |
* Corresponding author, E-mail: 2014010013@hzvtc.edu.cn
Received 20 Mar 2023, Accepted 18 Dec 2023
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