Experimental and numerical study of metal-oxides/water nanofluids as coolant in photovoltaic thermal systems (PVT)

Sardarabadi, Mohammad; Passandideh-Fard, Mohammad

doi:10.1016/j.solmat.2016.07.008

Cited by 263 publications

(67 citation statements)

References 31 publications

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“…Results indicated that by increasing the mass concentration of NPs in the range of 1% to 3%, both energy and exergy efficiencies improved significantly. Sardarabadi and Passandideh‐Fard used Al 2 O 3 /water, TiO 2 /water, and ZnO/water nanofluids in a sheet and tube PV/T system. Based on the obtained results, using TiO 2 /water and ZnO/water nanofluids leads to the higher electrical performance of the system in comparison with Al 2 O 3 /water.…”

Section: Nanotechnology Application In Solar Energymentioning

confidence: 99%

Renewable energy harvesting with the application of nanotechnology: A review

et al. 2018

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Summary It is believed that fossil fuel sources are exhaustible and also the major cause of greenhouse gas emission. Therefore, it is required to increase the portion of renewable energy sources in supplying the primary energy of the world. In this study, it is focused on application of nanotechnology in exploitation of renewable energy sources and the related technologies such as hydrogen production, solar cell, geothermal, and biofuel. Here, nanotechnologies influence on providing an alternative energy sources, which are environmentally benign, are comprehensively discussed and reviewed. Based on the literature, employing nanotechnology enhances the heat transfer rate in photovoltaic/thermal (PV/T) systems and modifies PV structures, which can improve its performance, making fuel cells much cost‐effective and improving the performance of biofuel industry through utilization of nanocatalysts, manufacturing materials with high durability and lower weight for wind energy industry.

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Section: Nanotechnology Application In Solar Energymentioning

confidence: 99%

Renewable energy harvesting with the application of nanotechnology: A review

et al. 2018

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“…The top loss coefficient ( U t ) of the collector is calculated as Equation :

U_{t} = {[\frac{N}{\frac{B}{T_{p}} \cdot {((), \frac{T_{normalp} - T_{am}}{N + f})}^{q}} + \frac{1}{h_{a}}]}^{- 1} + ([], \frac{σ \cdot ({T_{p}}^{2} + {T_{am}}^{2}) \cdot (T_{normalp} + T_{am})}{\frac{1}{ε_{normalp} + 0.00591 \cdot N \cdot h_{normala}} + \frac{2 \cdot N + f - 1 + 0.133 \cdot ε_{normalp}}{ε_{g}} - N}),

where N is the number of glass covers, ε p and ε g are emissivity of absorber plate and glass cover, respectively, and σ = 5.67 × 10 −8 W/(m 2 K 4 ) is the Stefan‐Boltzmann constant. h a is the heat transfer coefficient between air and the glass cover, calculated by the below correlation:

h_{a} = 5.7 + 3.8 \cdot v_{a},

where v a is the wind velocity. All other supportive equations to find the top loss coefficient ( U t ) are given below:

f = ((), 1 + 0.089 \cdot h_{a} - 0.1166 \cdot h_{a} \cdot ε_{p}) \cdot ((), 1 + 0.07866 \cdot N),

B = 520 \cdot ((), 1 - 0.000051 \cdot β^{2}); 0 \leq β \leq 70,

q = 0.43 \cdot

…”

Section: System Descriptionmentioning

confidence: 99%

“…where N is the number of glass covers, ε p and ε g are emissivity of absorber plate and glass cover, respectively, and σ = 5.67 × 10 −8 W/(m 2 K 4 ) is the Stefan-Boltzmann constant. h a is the heat transfer coefficient between air and the glass cover, calculated by the below correlation 22 :…”

Section: Flat-plate Solar Collectormentioning

confidence: 99%

Comparative analysis of a solar‐driven novel salt‐based absorption chiller with the implementation of nanoparticles

2019

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Summary The present study exemplifies the comprehensive thermal analysis to compare and contrast ammonia‐lithium nitrate (NH3‐LiNO3) and ammonia‐sodiumthiocynate (NH3‐NaSCN) absorption systems with and without incorporation of nanoparticles. A well‐mixed solution of copper oxide/water (CuO/H2O) nanofluid is considered inside a flat‐plate collector linked to an absorption chiller to produce 15‐kW refrigeration at −5°C evaporator temperature. Enhancements in heat transfer coefficient, thermal efficiency, and useful heat gain of the collector are evaluated, and the effect of these achievements on the performance of both absorption chillers have been determined for different source temperatures. A maximum 121.7% enhancement is found in the heat transfer coefficient with the application of the nanofluid at 2% nanoparticle concentration. The maximum coefficient of performance observed for the NH3‐NaSCN chiller is 0.12% higher than that for the NH3‐LiNO3 chiller at 0°C evaporator temperature. Contradictory to this, the average system coefficient of performance of the NH3‐LiNO3 absorption system has been found 5.51% higher than that of the NH3‐NaSCN system at the same evaporator temperature. Moreover, the application of the nanofluid enhanced the performance of the NH3‐NaSCN and NH3‐LiNO3 systems by 2.70% and 1.50%, respectively, for lower generator temperature and becomes almost the same at higher temperatures, which altogether recommends the flat‐plate collector–coupled NH3‐LiNO3 absorption system be integrated with a nanofluid.

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“…Solar uses the PV module to convert the heat into useful electrical output. 10 Ebaid et al (2018) employed Al 2 O 3 and TiO 2 on PV/T configurations and presented notable results stating that TiO 2 nanoparticle workability is higher than Al 2 O 3 . Meanwhile, only 5 to 25% have converted as electrical output and remaining is wasted by absorption and reflection.…”

Section: Introductionmentioning

confidence: 99%

“…) Schematic diagram[10] b) Experimental setup[14] [Colour figure can be viewed at wileyonlinelibrary.com] angle of 35°to receive maximum solar radiation. Similar setup has been used by Abdallah et al (2019…”

mentioning

confidence: 99%

Progress of MWCNT, Al ₂ O ₃ , and CuO with water in enhancing the photovoltaic thermal system

et al. 2019

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Hybrid photovoltaic thermal system is an effective method to convert solar energy into electrical and thermal energy. However, its effectiveness is widely affected due to the high temperature of photovoltaic panel, and it can be minimized by employing nanofluids to the PV/T systems. In this research, the effect of various nanoparticles on the PV/T systems was studied experimentally. The nanofluids Al 2 O 3 , CuO, and multiwall carbon nanotube (MWCNT) were dispersed with water at different volume fractions of 0, 0.5, 1, 2.5, and 5 (vol%) using ultrasonication process. The effect of nanomaterials on viscosity and density was classified. All tests were carried out in an outdoor laboratory setup for calibrating the PV temperatures, thermal conductivity, electrical power, electrical efficiency, and overall efficiency. In addition, the energy analyses were also made to estimate the loss of heat owing to the nanofluids. Results show that use of the nanofluid increased the electric power and electrical efficiency of PV/T compared with water. Furthermore, MWCNT and CuO reduced the cell temperature by 19%. Consequently, the nanofluids MWCNT, Al 2 O 3 , and CuO produced the impressive values of 60%, 55%, and 52% increase in an average electrical efficiency than conventional PV. Particularly, the MWCNT produced superior results compared with other materials. It is evidently clear from the result that the introduction of the nanofluid increases the thermal efficiency without adding any extra energy to the system. Moreover, insertion of Al 2 O 3 , CuO, and MWCNT on PV/T system increases the exergy efficiency more than conventional PV module.How to cite this article: Sangeetha M, Manigandan S, Chaichan MT, Kumar V. Progress of MWCNT, Al 2 O 3 , and CuO with water in enhancing the photovoltaic thermal system. Int J Energy Res.

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Experimental and numerical study of metal-oxides/water nanofluids as coolant in photovoltaic thermal systems (PVT)

Cited by 263 publications

References 31 publications

Renewable energy harvesting with the application of nanotechnology: A review

Renewable energy harvesting with the application of nanotechnology: A review

Comparative analysis of a solar‐driven novel salt‐based absorption chiller with the implementation of nanoparticles

Progress of MWCNT, Al ₂ O ₃ , and CuO with water in enhancing the photovoltaic thermal system

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