Nanofluid-Powered Dual-Fluid Photovoltaic/Thermal (PV/T) System: Comparative Numerical Study

Hussain, M. Imtiaz; Kim, Jinhee; Kim, Jun-Tae

doi:10.3390/en12050775

Cited by 31 publications

(13 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To enlarge the spectrum of the investigation, we decided to evaluate the environmental impact of barocaloric technology while the system mounts advanced HTF: The nanofluids [39][40][41][42][43][44][45]. Specifically, we tested variable concentrations of Al 2 O 3 -water nanofluids and of Cu-50%EG/50%W nanofluids, respectively, for heat-pumping and for cooling usages.…”

Section: Auxiliary Fluidsmentioning

confidence: 99%

Is Barocaloric an Eco-Friendly Technology? A TEWI Comparison with Vapor Compression under Different Operation Modes

Aprea

Greco

Maiorino

et al. 2019

Climate

View full text Add to dashboard Cite

Barocaloric is a solid-state not-in-kind technology, for cooling and heat pumping, rising as an alternative to the vapor compression systems. The former is based on solid-state refrigerants and the latter on fluid ones. The reference thermodynamical cycle is called active barocaloric regenerative refrigeration (or heat pumping cycle). The main advantage of this technology is to not employ greenhouse gases, which can be toxic or damaging for the environment and that can contribute to increasing global warming. In this paper, the environmental impact of barocaloric technology was evaluated through a Total Equivalent Warming Impact (TEWI) analysis carried out with the help of a numerical 2D model solved through a finite element method. Specifically, we propose a wide investigation on the environmental impact of barocaloric technology in terms of TEWI index, also making a comparison with a vapor compression plant. The analysis focuses on both the cooling and heat pump operation modes, under different working conditions and auxiliary fluids. The results revealed that a barocaloric system based on ABR cycle could provide a reduction of the environmental impact with respect to a vapor compression system. The addition of nanofluids contributes in reducing the environmental impact up to –62%.

show abstract

Section: Auxiliary Fluidsmentioning

confidence: 99%

Is Barocaloric an Eco-Friendly Technology? A TEWI Comparison with Vapor Compression under Different Operation Modes

Aprea

Greco

Maiorino

et al. 2019

Climate

View full text Add to dashboard Cite

show abstract

“…The number of hidden neurons can be identified by employing a trial-and-error procedure [57,58] or using some empirical rules, as reported in [59]. There is no specific process to evaluate the optimal number of hidden neurons, but it must be identified case by case.…”

Section: Training the Artificial Neural Networkmentioning

confidence: 99%

“…In this study the evaluation of the number of hidden neurons was made by employing an iterative trial-and-error process. The minimum number of hidden neurons N h,min was identified using the following empirical rule [59,60]:…”

Section: Training the Artificial Neural Networkmentioning

confidence: 99%

Refrigeration Systems and Applications

Dinçer¹

2017

View full text Add to dashboard Cite

Refrigeration applications are generally based on vapor compression systems and represent a significant contribution to global climate change. While refrigeration is instrumental to the development of humanity, it is predicted that an increase in the number of refrigeration applications will worsen the issue of climate change. Hence, energy-efficient systems with a lower contribution to global warming are required. In the last years the research and development of new working fluid technologies and methodologies have provided an opportunity for the transition from vapor compression systems based on fluorine fluids to more sustainable alternatives. For instance, the potential advantages and drawbacks of hydrofluoroolefins are being investigated, and mixtures with hydrofluorocarbons are being developed to find trade-off solutions. Furthermore, the applications of hydrocarbons are being extended to installations that require a lower refrigerant charge. Lower flammability refrigerants require new flammability and risk analysis studies to determine their possible hazard. Heat and mass transfer phenomena studies are being carried out for new pure and mixed refrigerants. Ejectors are being studied to increase energy performance in particular applications. Alternative technologies based on renewable energy or solid states, such as solar cooling or magnetic refrigeration, are being developed and integrated into new processes. The integration of phase change materials and slurries is a promising new alternative. Finally, nanoparticles and nanofluids have opened an entirely new world of possibilities. The available literature on these topics is still in its early stages and these working fluids, technologies, and methodologies are not considered mature. However, there is significant potential to improve energy efficiency as well as the operation and capacity of these new approaches.

show abstract

“…It has been extensively reported that nanofluids and working fluid mixed with nanoparticles possess superior thermal conductivity to that of pure fluid [5][6][7][8][9][10][11]. In particular, nanofluids have been applied in energy storage systems to enhance the thermal conductivity of the energy storage materials [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study

Zhou

Wang

2019

Energies

View full text Add to dashboard Cite

The thermal energy storage properties of a working fluid can be modified by the exothermic and endothermic adsorption and desorption of fluid molecules in the micro/nanoporous materials. In this study, thermogravimetric (TG) analysis experiments and molecular simulations (molecular dynamics, MD, and grand canonical Monte Carlo, GCMC) were employed to examine the thermal energy storage properties of the UIO-66 metal organic framework material, UIO-66/H2O nanofluids and pure water. Our results showed that the molecular simulation calculations were, in principle, consistent with the obtained experimental data. The thermal energy storage performance of UIO-66/H2O nanofluids was enhanced with the increase in the UIO-66 mass fraction. In addition, the differences between the simulation calculations and experimental results could be mainly ascribed to the different structures of UIO-66 and the evaporation of fluid samples. Furthermore, this work indicated that molecular simulations contributed to developing novel working pairs of metal organic heat carriers (MOHCs).

show abstract

Nanofluid-Powered Dual-Fluid Photovoltaic/Thermal (PV/T) System: Comparative Numerical Study

Cited by 31 publications

References 30 publications

Is Barocaloric an Eco-Friendly Technology? A TEWI Comparison with Vapor Compression under Different Operation Modes

Is Barocaloric an Eco-Friendly Technology? A TEWI Comparison with Vapor Compression under Different Operation Modes

Refrigeration Systems and Applications

Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study

Contact Info

Product

Resources

About