Experimental study of a nanofluid-based photovoltaic/thermal collector equipped with a grooved helical microchannel heat sink

Shahsavar, Amin; Jha, Prabhakar; Askari, Ighball Baniasad

doi:10.1016/j.applthermaleng.2022.119281

Cited by 32 publications

(6 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 7 shows some of the mini/microchannel geometries that have been developed [83]. Table 2 summarizes notable studies on mini/microchannels [84][85][86][87][88][89][90][91]. Deng et al [84] demonstrated that integrating a microchannel heat pipe array (MHPA) into a flat-plate solar collector (FPC) tends to result in low heat loss.…”

Section: Mini/microchannelsmentioning

confidence: 99%

“…Despite this, MHPA exhibited superior performance in all instantaneous efficiency tests when compared to other samples. Shahsavar et al [85] compared three microchannel designs and found that a staggered design, combined with a PVT system using nanofluid flow, achieved superior performance compared to parallel and plain designs. Besides the choice of nanofluid to enhance thermal performance, the staggered design's geometry facilitated enhanced fluid mixing.…”

Section: Mini/microchannelsmentioning

confidence: 99%

See 1 more Smart Citation

A Review of Heat Dissipation and Absorption Technologies for Enhancing Performance in Photovoltaic–Thermal Systems

Kurniawati,

Sung

2024

Energies

View full text Add to dashboard Cite

With the growing demand for photovoltaic (PV) systems as a source of energy generation that produces no greenhouse gas emissions, effective strategies are needed to address the inherent inefficiencies of PV systems. These systems typically absorb only approximately 15% of solar energy and experience performance degradation due to temperature increases during operation. To address these issues, PV–thermal (PVT) technology, which combines PV with a thermal absorber to dissipate excess heat and convert it into additional thermal energy, is being rapidly developed. This review presents an overview of various PVT technologies designed to prevent overheating in operational systems and to enhance heat transfer from the solar cells to the absorber. The methods explored include innovative absorber designs that focus on increasing the heat transfer contact surface, using mini/microchannels for improved heat transfer contiguity, and substituting traditional metal materials with polymers to reduce construction costs while utilizing polymer flexibility. The review also discusses incorporating phase change materials for latent heat absorption and using nanofluids as coolant mediums, which offer higher thermal conductivity than pure water. This review highlights significant observations and challenges associated with absorber design, mini/microchannels, polymer materials, phase change materials, and nanofluids in terms of PV waste heat dissipation. It includes a summary of relevant numerical and experimental studies to facilitate comparisons of each development approach.

show abstract

Section: Mini/microchannelsmentioning

confidence: 99%

Section: Mini/microchannelsmentioning

confidence: 99%

A Review of Heat Dissipation and Absorption Technologies for Enhancing Performance in Photovoltaic–Thermal Systems

Kurniawati,

Sung

2024

Energies

View full text Add to dashboard Cite

show abstract

“…where n is the number of thermocouples on the absorber plate. The mean flow area is used to compute the air velocity leaving the duct [40][41][42][43][44][45].…”

Section: Data Reduction the Mean Air Tmentioning

confidence: 99%

“…They found that the overall exergy efficiency of SPV-THC employing CuO nanofluid and water rose by 26% and 12.25%, respectively, when compared to a standard PV system. Shahsavar et al [42] carried out an experimental investigation to find the energy and exergy performance of a nanofluid-based photovoltaic thermal unit outfitted with a grooved helical microchannel heat sink. It was seen that the staggered unit has an overall energy efficiency of 17.05%, which is 6.96% greater than the simple and parallel units.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of the Effects of Nanofluid-Based Serpentine Tube Cooling Enhancement in Solar Photovoltaic Cells for Green Cities

Jose¹,

Shrivastava

Soni³

et al. 2023

Journal of Nanomaterials

View full text Add to dashboard Cite

In this work, the impact of the serpentine copper tube heat exchanger with nanofluids on 100 W solar photovoltaic thermal collectors (PV/T) was analyzed experimentally and numerically. The cooling fluids assessed in this system were distilled water, Al2O3 0.1%, and Al2O3 0.2% based nanofluids. Tests were accomplished at diverse coolant mass flow rate in India’s summer days of 2018. A computational fluid dynamics (CFD) investigation was carried out to perform a parametric study, identify surface and exit T profiles, and examine the cooling effectiveness. The impact of mass flow rate of nanofluid on the outside T and Reynolds number were studied. The Reynolds number obtained in the flow experiments and CFD analysis was in the range of 900–1,300. The maximum irreversibility occurred while using water, whereas minimum irreversibility obtained Al2O3 0.2% nanofluid. Exergy efficiency was found to be increased from 20% to 36% during the day. It was identified that the increase in PV/T scheme led to higher exergy losses. The thermal efficiency of a water-based cooling system resulted in 53.61%. Meanwhile, Al2O3 0.1% and Al2O3 0.2% based coolants provided 69.45% and 71.02%, respectively. A good agreement was obtained between the experimental results and the computer model.

show abstract

“…The proposed models can help to reduce the time and resources needed for experiments. Also, the models in the present study can be used in a variety of applications such as heat sinks [85][86][87] , heat pipes 88 , microchannels 89,90 , heat exchangers [91][92][93] , enclosures 94,95 , solar energy 9,96,97 and automotive industry [98][99][100][101] .…”

Section: Combinatorial (Combi) Algorithmmentioning

confidence: 99%

Examining rheological behavior of CeO2-GO-SA/10W40 ternary hybrid nanofluid based on experiments and COMBI/ANN/RSM modeling

Sepehrnia

Maleki

Karimi

et al. 2022

Sci Rep

View full text Add to dashboard Cite

In this study, the rheological behavior and dynamic viscosity of 10W40 engine oil in the presence of ternary-hybrid nanomaterials of cerium oxide (CeO2), graphene oxide (GO), and silica aerogel (SA) were investigated experimentally. Nanofluid viscosity was measured over a volume fraction range of VF = 0.25–1.5%, a temperature range of T = 5–55 °C, and a shear rate range of SR = 40–1000 rpm. The preparation of ternary-hybrid nanofluids involved a two-step process, and the nanomaterials were dispersed in SAE 10W40 using a magnetic stirrer and ultrasonic device. In addition, CeO2, GO, and SA nanoadditives underwent X-ray diffraction-based structural analysis. The non-Newtonian (pseudoplastic) behavior of ternary-hybrid nanofluid at all temperatures and volume fractions is revealed by analyzing shear stress, dynamic viscosity, and power-law model coefficients. However, the nanofluids tend to Newtonian behavior at low temperatures. For instance, dynamic viscosity declines with increasing shear rate between 4.51% (at 5 °C) and 41.59% (at 55 °C) for the 1.5 vol% nanofluid. The experimental results demonstrated that the viscosity of ternary-hybrid nanofluid declines with increasing temperature and decreasing volume fraction. For instance, assuming a constant SR of 100 rpm and a temperature increase from 5 to 55 °C, the dynamic viscosity increases by at least 95.05% (base fluid) and no more than 95.82% (1.5 vol% nanofluid). Furthermore, by increasing the volume fraction from 0 to 1.5%, the dynamic viscosity increases by a minimum of 14.74% (at 5 °C) and a maximum of 35.94% (at 55 °C). Moreover, different methods (COMBI algorithm, GMDH-type ANN, and RSM) were used to develop models for the nanofluid's dynamic viscosity, and their accuracy and complexity were compared. The COMBI algorithm with R2 = 0.9995 had the highest accuracy among the developed models. Additionally, RSM and COMBI were able to generate predictive models with the least complexity.

show abstract

Experimental study of a nanofluid-based photovoltaic/thermal collector equipped with a grooved helical microchannel heat sink

Cited by 32 publications

References 63 publications

A Review of Heat Dissipation and Absorption Technologies for Enhancing Performance in Photovoltaic–Thermal Systems

A Review of Heat Dissipation and Absorption Technologies for Enhancing Performance in Photovoltaic–Thermal Systems

An Analysis of the Effects of Nanofluid-Based Serpentine Tube Cooling Enhancement in Solar Photovoltaic Cells for Green Cities

Examining rheological behavior of CeO2-GO-SA/10W40 ternary hybrid nanofluid based on experiments and COMBI/ANN/RSM modeling

Contact Info

Product

Resources

About