Abstract
Energy consumption in buildings is a major contributor to India's greenhouse gas emissions, accounting for a significant portion of the country's environmental impact. Consequently, there is a crucial need to prioritize energy-efficient heating, ventilation, and air conditioning technologies supported by solar thermal collectors to minimize the environmental consequences associated with building energy consumption. In this investigation, a flat-plate collector thermal performance is enhanced by the adaptations of 0.1 volume percentage concentrations of aluminum oxide (Al2O3), nickel (Ni), and combinations of Al2O3–Ni nanoparticles dispersed in water as hybrid nanofluid at 0.028, 0.041, 0.055, and 0.068 kgs−1 flow rates. Influences of nanofluid and flow rate conditions on thermal and exergy efficiency, heat transfer coefficient, entropy generation, and coefficient of performance of FPC are experimentally analyzed and spot that the hybrid nanofluid (Al2O3/Ni/water) own higher thermal and exergy efficiency of 72.8% and 22.9%, better heat transfer coefficient of 133.2 Wm−2 K−1, and high COP of 7.9 under high flow rate. These output results are higher than those of the water-fluid-operated FPC.
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Abbreviations
- A c :
-
Collector area (m2)
- Al2O3 :
-
Aluminum oxide
- C p :
-
Specific heat of fluid (J kg−1 K−1)
- COP:
-
Coefficient of performance
- D :
-
Tube diameter (m)
- F R :
-
Heat removal factor
- Fe2O4 :
-
Iron dioxide
- FPC:
-
Flat-plate collector
- H :
-
Heat transfer coefficient (Wm−2 K−1)
- HVAC:
-
Heating, ventilation, and air conditioning
- I :
-
Solar radiation (Wm−2)
- K :
-
Thermal conductivity (Wm−1 K−1)
- ṁ :
-
Flow rate of fluid (kgs−1)
- MgO:
-
Magnesium oxide
- MWCNT:
-
Multi-walled carbon nanotubes
- Ni:
-
Nickel
- Nu:
-
Nusselt number
- Q u :
-
Heat gain (W)
- Q in :
-
Energy input (W)
- S :
-
Entropy generation (W K−1)
- SiO2 :
-
Silicon dioxide
- T amb :
-
Ambient temperature (K)
- T in :
-
Inlet temperature (K)
- T out :
-
Outlet temperature (K)
- T sun :
-
Sun temperature (5770 K)
- U l :
-
Heat loss coefficient (Wm−2 K−1)
- \(\tau\) :
-
Transmittance
- \(\alpha\) :
-
Absorptivity
- η th :
-
Thermal efficiency (%)
- η e :
-
Exergy efficiency (%)
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The authors would like to acknowledge the Researchers Supporting Project number (RSP2024R373), King Saud University, Riyadh, Saudi Arabia.
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All authors contributed to the study's conception and design. The first draft of the manuscript was written by RV, and the individual contributions of ALL authors are given below: LS was involved in formal analysis, MA helped with methodology and writing, IH, SP, and AHS helped with investigation, KM participated in review and editing, VM and MAK helped with writing and language help, and RV participated in original draft preparation, supervision, and validation. All authors read and approved the final manuscript.
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This is an observational study. Influences of alumina, nickel, and alumina/nickel oxide nanofluid on thermal behavior of solar collector; Research Ethics Committee has confirmed that no ethical approval is required.
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Selvam, L., Aruna, M., Hossain, I. et al. Impact of hybrid nanofluid on thermal behavior of flat-plate solar collector: performance study. J Therm Anal Calorim 149, 5047–5057 (2024). https://doi.org/10.1007/s10973-024-12994-z
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DOI: https://doi.org/10.1007/s10973-024-12994-z