Application of nanofluids in thermosyphons: A review

Ramezanizadeh, Mahdi; Nazari, Mohammad Alhuyi; Ahmadi, Mohammad Hossein; Açıkkalp, Emin

doi:10.1016/j.molliq.2018.09.101

Cited by 132 publications

(29 citation statements)

References 86 publications

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“…The extraordinary properties of nanofluids compared to conventional fluids have recently led to a significant increase in the volume of studies performed on nanofluids [15][16][17][18]. These features can include improved heat transfer and reduced pressure drop, which are the main parameters in the design of electrical and mechanical equipment [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effect of water/carbon interaction strength on interfacial thermal resistance and the surrounding molecular nanolayer of CNT and graphene flake

Jabbari

Rajabpour

Saedodin

2019

Journal of Molecular Liquids

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Heat transfer at the liquid/solid interface, especially at the nanoscale, has enormous importance in nanofluids. This study investigates liquid/solid interfacial thermal resistance and structure of the formed molecular nanolayer around a carbon-based nanoparticle. Employing non-equilibrium molecular dynamics simulation and thermal relaxation method, the nanofluid systems with different nanoparticle diameters and different surface wettability were investigated. Simulation results show that carbon nanotubes (CNTs) with a smaller diameter attract more value of the base fluid and lead to a reduced Kapitza resistance. It was found that the thickness of the nanolayer around the nanoparticle is independent of the water/carbon interaction strength. Also, the value of the Kapitza resistance decreases with increasing the interaction strength. Ultimately, a correlation was proposed for the thermal resistance of CNT/water and graphene/water nanofluids in terms of wettability intensity of nanoparticle surface.The proposed correlation in addition to fitting to simulation results can cover the physical conditions of the system.Corresponding authors: * Rajabpour@eng.ikiu.ac.ir † s_sadodin@semnan.ac.ir

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Section: Introductionmentioning

confidence: 99%

Effect of water/carbon interaction strength on interfacial thermal resistance and the surrounding molecular nanolayer of CNT and graphene flake

Jabbari

Rajabpour

Saedodin

2019

Journal of Molecular Liquids

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“…There are two approaches to energy generation; an unstable approach with a heavy dependence on fossil fuels or nuclear energy leading to serious pollution issues and the disposal of radioactive waste; and a stable approach relying on the utilization of renewable resources (Dabrase and Ramachandra 2000). Environmental risks, reduced fossil fuel resources and never-ending rise in natural gas, petroleum and electricity costs have led to increasing attention to renewable energy consumption as clean, infinite, unlimited and environmentally friendly energy resources (Ahmadi et al 2018a;Ramezanizadeh et al 2018a;Rezaei et al 2018). Researchers suggest that proper energy consumption with reasonable costs is a key factor in the advancement of countries (Mondal and Denich 2010;Maherchandani et al 2012;Ahmadi et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Simulation of biogas utilization effect on the economic efficiency and greenhouse gas emission: a case study in Isfahan, Iran

Ariae¹,

Jahangiri

Fakhr

et al. 2019

Int. J. Renew. Energy Dev.

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Biomass is a type of renewable energy that, in despite of its potentials and advantages including simple production technology, decreasing environmental issues, and energy generation capacity at the consumption site, has not been sufficiently utilized in Iran. Since, due to statistics, Isfahan enjoys remarkable prospects in terms of wind, solar and biomass energies, a combined system of indigenous energy sources for powering a cattle farm has been investigated and evaluated in this study. To evaluate the possibility of the optimal system for comparative reasons, the HOMER software was used. The designed hybrid system was a wind-solar-biomass generator that used a battery saver as backup. Although it seems that wind and solar energies have the highest potential for energy generation in Isfahan, the results showed that biomass, by itself, can provide the required power for a cattle farm. In fact, biomass energy was more economically efficient than wind and solar energies. Owing to the low electricity cost, generated from fossil fuels, in Iran, relative to a large number of countries, the findings revealed that using biomass for generating the electricity of a cattle farm will compensate the expenses by the mid-15th year and will generate profit for 9.5 years later. The results also showed that the solar cell-based hybrid system is cheaper than the wind turbine-based one. Regarding the price of per kWh of electricity produced, the results showed that the biomass generator system with the price 0.12 $/kWh is the cheapest, and the solar cell-based and wind turbine-based hybrid systems are 3.33% and 10.83% more expensive, respectively. The results can be used for electricity generation with minimum pollution and expenses in the same regions. ©2019. CBIORE-IJRED. All rights reserved

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“…Renewable energy resources such as wind, geothermal, and solar are broadly employed for different goals including cooling, heating, and generation of electricity . Among the mentioned renewable energy sources, solar is one of the most attractive ones due to its easy availability and high capacity .…”

Section: Introductionmentioning

confidence: 99%

“…generation of electricity. [1][2][3][4] Among the mentioned renewable energy sources, solar is one of the most attractive ones due to its easy availability and high capacity. 5,6 There are several benefits in using solar energy such as reducing the production of greenhouse gases such as carbon dioxide, improving the efficiency of the current systems, decreasing the dependency on fossil fuel, and some social advantages such as job creation.…”

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confidence: 99%

Exergetic, economic, and environmental analyses of combined cooling and power plants with parabolic solar collector

Javadi

Ahmadi

Khalaji

2019

Env Prog and Sustain Energy

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Due to the necessity of achieving the energy systems with improved efficiency, combined power plants are developing in recent decades. Moreover, employing renewable energy sources in the power generation and heating/cooling purposes is an attractive idea to obtain more environmentally benign energy systems. In the current study, a combined cooling and power (CCP) plant is analyzed based on exergy and economic concepts. Afterward, by adding lithium‐bromide refrigeration cycle and parabolic solar collectors, the plant is investigated. The exergy efficiency, carbon dioxide emission, and cost of generated electricity are evaluated on the basis of SPECO model. The results of the study show that thermal and exergy efficiencies of the CCP plant with the solar collector depend on various parameters and can be affected significantly. The efficiency of the plant after applying lithium‐bromide refrigeration cycle and the solar collector increased from 50.33 to 51.73%, while the exergy efficiency enhanced from 47.48 to 48.22%. In addition, it was concluded that adding the collector and absorption chiller leads to 1.5% reduction in environmental pollutants.

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Application of nanofluids in thermosyphons: A review

Cited by 132 publications

References 86 publications

Effect of water/carbon interaction strength on interfacial thermal resistance and the surrounding molecular nanolayer of CNT and graphene flake

Effect of water/carbon interaction strength on interfacial thermal resistance and the surrounding molecular nanolayer of CNT and graphene flake

Simulation of biogas utilization effect on the economic efficiency and greenhouse gas emission: a case study in Isfahan, Iran

Exergetic, economic, and environmental analyses of combined cooling and power plants with parabolic solar collector

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