An experimental investigation on the effect of Al2O3/distilled water nanofluid on the energy efficiency of evacuated tube solar collector

Ghaderian, Javad; Sidik, Nor Azwadi Che

doi:10.1016/j.ijheatmasstransfer.2016.12.101

Cited by 133 publications

(34 citation statements)

References 24 publications

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“…Ghaderian and Sidik [164] set up an experiment to investigate the energy efficiency performance of ETC using Al 2 O 3 water nanofluid. This investigation done with a passive-glass circulation evacuated tube solar thermosyphon collector model, connected to a spherical coil inside a horizontal tank.…”

Section: Nanofluids In Evacuated Tube Collectors (Etc)mentioning

confidence: 99%

Nanofluids in Solar Thermal Collectors: Review and Limitations

et al. 2020

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Solar thermal collectors are systems that allow for the use of solar energy in thermal applications. These collectors utilize a heat transfer fluid to transport absorbed solar radiation to applications where they are needed. Scientists in a bid to improve the conversion efficiency of solar collectors have suggested different collector designs and improved collector materials. Over the last 25 years, the study of nanofluids and their applications have revolutionized material science, and nanotechnology has found applications in improving solar collector materials. This article reviews the impact of different nanomaterials on the efficiency of solar collectors. The study also outlines the limitations of applying nanofluids and discusses the long-term challenges of their application to solar collectors. Nanofluids have the potential to improve the overall efficiency of most solar collectors, however, the full potential of nanofluids in heat transfer applications cannot be completely achieved until some of the questions regarding hysteresis, stability, and the overall predictability of nanofluids are answered.

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Section: Nanofluids In Evacuated Tube Collectors (Etc)mentioning

confidence: 99%

Nanofluids in Solar Thermal Collectors: Review and Limitations

et al. 2020

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“…0%, 3% and 6%) with volume flow rate equal to 0.47 l/s. The thermal efficiency is calculated by equations presented in Ghaderian and Sidik [21], in particular:…”

Section: Solar Collectormentioning

confidence: 99%

Application of nanofluids in solar cooling system: Dynamic simulation by means of TRNSYS software

Buonomo¹,

Cascetta²,

Cirillo³

et al. 2018

MMC_B

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Convective heat transfer can be enhanced passively by using fluids with high value of the thermal conductivity. An innovative method of enhancement of thermal conductivity of base fluids is to insert nanoparticles. In recent years, nanofluids and their possible applications have been extensively studied. In this study, simulation based on a performance analysis of a solar cooling system is carried out by means of TRNSYS. First the analysis determines the peak energy demand for a building located in Naples. Beside, for the same configuration of solar system both pure water and Al2O3/water based nanofluids are considered as working fluids. Different values of volume nanoparticles concentrations, equal to 3%, and 6%, are investigated. The configuration is fully modelled in TRNSYS and dynamic simulations are run for the entire year. Various performance factors such as useful energy gain from collector, solar fraction, primary energy savings and pumping consumption are evaluated. Simulations results demonstrate that for the whole summer season, using nanofluids as working fluid, always higher primary energy savings results. Besides, solar fraction, difference between nanofluids with nanoparticles concentration of 3% and 6% is estimated to be marginal. In terms of PEC and primary energy savings, nanofluids with nanoparticles concentration of 6% has presented higher values.

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“…The obtained results indicate that the use of nanoparticles as a mixture with the water was favorable to achieve the expected outcome. [19][20][21] The integration of the ETHPSC with the phase change materials was investigated theoretically as well as experimentally for the storage of latent thermal energy (especially in the case of the domestic hot water generation plant). 22,23 As per the literature review, the published data associated with the heat transfer modeling of the ETHPSC are inadequate.…”

Section: Introductionmentioning

confidence: 99%

Evacuated tube heat pipe solar collector for Encontech engine‐driven reverse osmosis solar desalination

Takalkar

Bhosale

2020

Int J Energy Res

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Utilization of a single evacuated tube heat pipe solar collector (ETHPSC) for the efficient deployment of the solar energy toward driving the Encontech heat engine for reverse osmosis desalination is considered in this study. The effects of the mass flow rate of water _ m w ð Þ, inlet temperature (T i), solar intensity (I), the ratio of the condenser to absorber area (A co /A abs), heat transfer coefficients (h air and h vacuum) on energy and exergy efficiency (η, η Ex), the absorber (T abs), condenser (T co), and the outlet temperature (T o) are explored by using a heat transfer resistance model. An open-source SCILAB software was used for performing the computer simulations. The simulation results show that for each h air there is an optimum T i (based on the exergetic performance). The lower h air and h vacuum appears to be more promising to improve the efficiency and temperature gain (T i − T o) of the ETHPSC. The maximum energetic efficiency of 52.5% is obtained for h vacuum (1 W/m 2 K). Obtained results further demonstrate that the energetic and exergetic performances of the ETHPSC are higher at T i = 50 C. Both energetic and exergetic efficiencies exhibit upper values at A co /A abs ratio up to 1. Further increment in this ratio up to 3 resulted in a decrease in the efficiency of the ETHPSC.

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An experimental investigation on the effect of Al2O3/distilled water nanofluid on the energy efficiency of evacuated tube solar collector

Cited by 133 publications

References 24 publications

Nanofluids in Solar Thermal Collectors: Review and Limitations

Nanofluids in Solar Thermal Collectors: Review and Limitations

Application of nanofluids in solar cooling system: Dynamic simulation by means of TRNSYS software

Evacuated tube heat pipe solar collector for Encontech engine‐driven reverse osmosis solar desalination

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