Article
Thermodynamics
Mehmet Senan Yilmaz, Murat Unverdi, Hasan Kucuk, Nurettin Akcakale, Fethi Halici
Summary: This study experimentally investigated the effects of Al2O3-water nanofluids with different volume concentrations on heat transfer and pressure drop in a mini-channel shell and tube heat exchanger. The results showed that the nanofluids increased the convective heat transfer coefficient in the transition and turbulent regions and extended the transition region. The nanofluids had higher friction factors compared to water. The study also found the optimal volumetric concentration and flow rate for the nanofluids to enhance heat transfer in the heat exchanger.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Dan Zheng, Jianqiang Du, Wei Wang, Jiri Jaromir Klemes, Jin Wang, Bengt Sunden
Summary: This research investigates the convective heat transfer and hydraulic resistance of smooth and corrugated double-tube heat exchangers at different flow rates. The combination of a thread structure on the outer tube side and nanofluids on the inner tube side improves the overall heat transfer performance. The best combination is a 4 mm thread pitch with a 1.5 wt% SiC-water nanofluid, resulting in a 59% increment in the comprehensive performance index.
Article
Environmental Sciences
Babu Sasi Kumar Subrananiam, Arun Kumar Sugumaran, Muthu Manokar Athikesavan
Summary: The main focus of this study is to determine the performance efficiency of water-%CuO nanofluids and water at different flow rates. The results show that dispersing copper oxide nanoparticles in water can improve thermal efficiency. The highest efficiency was observed with water-0.3% vol CuO nanofluids at a flow rate of 0.035 lit/sec in the evacuated tube collector.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Amin Amiri Delouei, Meysam Atashafrooz, Hasan Sajjadi, Sajjad Karimnejad
Summary: This study experimentally investigates the effects of nanofluid concentration on forced convective heat transfer in an ultrasonic vibrating finned tube heat exchanger. The results reveal that increasing nanofluid concentration can enhance the effect of ultrasonic vibration, while the increase of ambient temperature and passing air velocity reduces the ultrasonic effect.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Rehan Qaiser, Muhammad Mahabat Khan, Lehar Asip Khan, Muhammad Irfan
Summary: Experimental and numerical investigations were conducted for heat transfer enhancement in a horizontal Latent Thermal Energy Storage System using multiple heat transfer tubes and modified shell designs. The results showed that vertical double tube and triple tube V-configuration significantly improve heat transfer rates compared to the Base Case, with a corresponding reduction in complete melting times. Additionally, elliptic and triangular shell design modifications were found to increase heat transfer rates and reduce melting times effectively.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Engineering, Chemical
Babak Masoumpour, Mohammad Ataeizadeh, Hassan Hajabdollahi, Mohammad Shafiey Dehaj
Summary: This paper investigates a new heat exchanger configuration that considers the return of stream from the outlet to mix with the inlet stream. Numerical analysis is conducted to study the effect of mass flow rate recovery (MFRR) with reflux direction on thermo-economic optimization of the shell and tube heat exchanger (STHE). The results show significant improvements in terms of total annual cost (TAC) and effectiveness compared to conventional heat exchangers, particularly when considering MFRR.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Thermodynamics
Zafar Said, Shek Rahman, Prabhakar Sharma, Ahmed Amine Hachicha, Salah Issa
Summary: This study utilized MWCNT/water nanofluids to enhance the performance of a shell and tube heat exchanger, showing significant improvements in heat transfer coefficient and overall efficiency. Experimental and numerical results demonstrated enhancements with a 0.3% volume fraction and the addition of semicircular baffles. The MLP-ANN based predictive model showed robust forecasting capability with high efficiency values.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Chemical
P. Ganesh Kumar, N. Thangapandian, V. S. Vigneswaran, S. Vinothkumar, B. Mouli Prasanth, Sung Chul Kim
Summary: The study investigates the effects of shot peening on heat transfer, exergy analysis, and pressure drop in a heat exchanger. The results show that nanofluids can significantly enhance the heat transfer performance and exergy efficiency of the heat exchanger.
Article
Thermodynamics
Amr M. Hassaan
Summary: This study investigated the performance of multi-wall carbon nanotubes (MWCNTs) based on distilled water in a shell and tube heat exchanger, revealing that nanofluids have a significant impact on heat transfer. Increasing concentration leads to higher heat transfer coefficient and effectiveness, but also results in increased pressure drop and friction factor.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Marina Borsuk Fogaca, Daniele Toniolo Dias, Sergio Leonardo Gomez, Jhon Jairo Ramirez Behainne, Rozane de Fatima Turchiello
Summary: This study evaluated the thermal performance of gold nanofluid as a cooling liquid in a heat exchanger, finding that lower concentration nanofluids were more efficient, suggesting a range of gold concentration values for improving heat transfer effectiveness.
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2021)
Article
Thermodynamics
Ziga Ahcin, Jierong Liang, Kurt Engelbrecht, Jaka Tusek
Summary: Shell-and-tube(rod)-like regenerators exhibit high efficiency and good heat transfer performance for low-temperature refrigeration applications, but further optimization of packing density and heat transfer coefficients is required.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Ali Akbar Abbasian Arani, Hamed Uosofvand
Summary: Numerical investigation on laboratory-scale segmental baffles shell-and-tube heat exchanger reveals that twisted oval tubes with segmental baffles can significantly reduce pressure drop and improve heat transfer compared to circular and elliptical tube bundles. The STHX with twisted oval tube bundles and segmental baffle exhibits the highest efficiency evaluation coefficient (EEC) value equal to 1.16 among all investigated models.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Energy & Fuels
Ashok Kumar, S. Arivazhagan, K. Muninathan
Summary: The preservation of thermal energy is a significant problem that needs to be resolved. This study focuses on designing and analyzing a vertical shell and tube type thermal energy storage system (TESS) using water as heat transfer fluid (HTF) and paraffin wax RT58 as phase change material (PCM). The results demonstrate that the PCM can act as a better alternative for energy storage medium compared with the present solar energy storage methods.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
D. Dhinesh Kumar, A. Valan Arasu
Summary: This study demonstrates that the TiO2-Ag/distilled water nanocompositefluid has the potential to improve the thermal performance of a horizontal shell and tube heat exchanger by enhancing heat transfer efficiency. Although the nanocompositefluid requires higher pumping power, reducing the size of the heat exchanger and minimizing the pumping power penalty can lead to cost reductions for the heat exchanger.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Mashhour A. Alazwari, Nidal H. Abu-Hamdeh, Elias Mesfin Salilih
Summary: This study examined the accuracy of estimating k(SiO2/EG) using artificial neural networks and response surface methodology. Results showed that artificial neural networks were superior in predicting thermal conductivity, with both methods showing low accuracy at low mass fractions. The application of SiO2/EG nanofluid through a heat exchanger was challenged from the perspective of the second law of thermodynamics.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Manzoore Elahi M. Soudagar, Asif Afzal, Mohammad Reza Safaei, A. Muthu Manokar, Ahmed EL-Seesy, M. A. Mujtaba, Olusegun David Samuel, Irfan Anjum Badruddin, Waqar Ahmed, Kiran Shahpurkar, Marjan Goodarzi
Summary: In this study, experiments were conducted to prepare biodiesel from cottonseed oil and blend it with octanol, with the added improvement of thermal and mass transfer characteristics through functionalized multi-walled carbon nanotubes (MWCNTs). The performance analysis showed that adding octanol and MWCNT nanoparticle can stabilize fuel consumption rate and increase brake thermal efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Correction
Thermodynamics
Manzoore Elahi M. Soudagar, Asif Afzal, Mohammad Reza Safaei, A. Muthu Manokar, Ahmed I. EL-Seesy, M. A. Mujtaba, Olusegun David Samuel, Irfan Anjum Badruddin, Waqar Ahmed, Kiran Shahapurkar, Marjan Goodarzi
Summary: This passage mentions the issue of incorrect publication of the affiliations of authors in an article.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Nessrin Manaa, Awatef Abidi, Patrice Estelle, Mohammed Naceur Borjini
Summary: The computational analysis in this study focused on three-dimensional thermo-solutal natural convection in a cubical enclosure filled with micropolar CNT/water nanofluid stabilized by lignin and sodium polycarboxylate surfactants. Various parameters were investigated, showing that the micropolar nanofluid model had lower heat and mass transfer rates compared to the pure nanofluid model. Additionally, the use of lignin as a surfactant improved heat and mass transfer rates and nanofluid flow better than sodium polycarboxylate. Controlled manipulation of nanoparticles' volume fraction can impact heat rate and fluid flow.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Janki Shah, Mukesh Ranjan, Prachi Thareja, Patrice Estelle
Summary: The objective of this research is to examine how ultrasonication time affects the properties of CuO nanofluid. It is found that at an optimal sonication time of 80 min, the particle dispersion is more stable, and the nanofluid has the lowest viscosity and maximum thermal conductivity.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Chemical
Jacek Fal, Jolanta Sobczak, Ryszard Stagraczynski, Patrice Estelle, Gawel Zyla
Summary: The electrical conductivity of ethylene glycol-based nanofluids containing three types of titanium dioxide nanoparticles was investigated experimentally, and a new theoretical correlation was proposed. The influence of nanoparticle content and phase on the electrical conductivity of ethylene glycol was observed.
Article
Thermodynamics
Hojjat Alizadeh, Hadi Pourpasha, Saeed Zeinali Heris, Patrice Estelle
Summary: This study investigated the effect of adding covalently functionalized and non-covalently functionalized multi-walled carbon nanotubes on the breakdown voltage and thermal properties of transformer oil. The results showed that the covalently functionalized MWCNTs-OH/transformer oil nanofluid exhibited better thermal performance and breakdown voltage characteristics, making it suitable for preventing transformer overheating and serving as electrical insulation.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Atiyeh Aghaei Sarvari, Saeed Zeinali Heris, Mousa Mohammadpourfard, Seyed Borhan Mousavi, Patrice Estelle
Summary: The present study evaluates the influence of multi-walled carbon nanotubes (MWCNTs) and TiO2 nanoparticles (NPs) on lubricant and fluid flow within natural gas turbine meters. Experimental and simulation results show that the presence of nanoparticles increases pressure drop, with higher concentrations and volume flow rates resulting in larger pressure drop values. Additionally, the friction coefficient is directly and inversely proportional to NPs concentration and volume flow rates, respectively.
Article
Thermodynamics
Mohamad Nur Hidayat Mat, Normah Mohd-Ghazali, Hielfarith Suffri Shamsuddin, Patrice Estelle
Summary: This study used CFD numerical simulation to investigate the fluid flow of nanofluids with Triton TX-100 surfactant and boron nitride nanotubes as the base fluid at different temperatures in microchannels. The results showed that nanofluids operated at high temperature had lower thermal resistance, but higher pumping power compared to distilled water at 30 degrees Celsius.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Awatef Abidi, Nessrin Manaa, Degani Mohamed, Patrice Estelle, Mohammed Naceur Borjini
Summary: This study investigates the three-dimensional combined thermal-solutal capillary and buoyancy convection performances of micropolar multi-walled carbon nanotubes-water nanofluid numerically. The results show that surface tension significantly affects the heat/mass transfer rate, especially at low Rayleigh numbers. The averaged Nusselt and Sherwood numbers are improved in the thermal-dominated regime due to the unidirectional effects of surface tension and buoyancy. However, an opposite trend is observed in the solutal-buoyancy governed zone. The performance of the multi-walled carbon nanotubes/water nanofluid also depends on the volume concentration of nanoparticles.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Jyesta M. Adhidewata, Ahmad R. T. Nugraha, Eddwi H. Hasdeo, Patrice Estelle, Bobby E. Gunara
Summary: By combining semi-analytical Boltzmann transport and first-principles calculations, the researchers investigated the thermoelectric properties of semiconducting materials by adjusting the degrees of polynomials in their energy dispersion relations. They found that tuning the band gap and breaking the band symmetry can achieve optimal thermoelectric efficiency.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Suhaib Umer Ilyas, Rashid Shamsuddin, Tan Kai Xiang, Patrice Estelle, Rajashekhar Pendyala
Summary: The evolution of nanofluid technology has shown enormous potential in thermal management and lubrication applications. This study investigates the rheological behavior of graphene and its hybrid nano-dispersions in thermal oil, revealing non-Newtonian fluid behavior and a shift from the Power Law model to the Herschel-Bulkley model at high nanomaterial loadings. The study also demonstrates that hybrid additives act as viscosity reducers for graphene-based nanofluids. Parametric analysis considers factors such as shear rate, temperature, nanomaterial loading, and surfactant concentration, and proposes a correlation for nanofluid viscosity. (C) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Mauricio Pavia, Melanie Emo, Patrice Estelle, Abdul Rahman Mohamed, Brigitte Vigolo
Summary: In this study, covalent functionalization of multiwalled carbon nanotubes and graphene nanoplatelets was conducted using refluxing in sulfuric acid/nitric acid mixtures of different concentrations. The aim was to achieve both enhanced thermal conductivity and stable dispersion in carbon nanomaterial-based nanofluids. The results showed that the best performance was achieved with MWCNT treated with a sulfuric acid/nitric acid mixture at concentrations of 3 and 5 M, resulting in a 9.4% enhancement of thermal conductivity at 20°C and stable dispersion over 5 weeks.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Thermodynamics
S. Anitha, Mohammad Reza Safaei, S. Rajeswari, M. Pichumani
Summary: This study focuses on the thermal performance of double-tube heat exchangers with two types of hybrid nanofluids, showing that TiO2-γ-AlOOH/water leads to a 50% improvement in heat transfer rate compared to TiO2-γ-AlOOH/ethylene glycol. However, the latter has a higher pumping power by 30%. Further analysis on the energy consumption of heat exchangers with ethylene glycol-based coolants on an industrial scale is needed for future research.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
K. A. Sateesh, V. S. Yaliwal, Manzoore Elahi M. Soudagar, N. R. Banapurmath, H. Fayaz, Mohammad Reza Safaei, Ashraf Elfasakhany, Ahmed EL-Seesy
Summary: The study investigates the impact of nanofluids using Al2O3 nanoparticles on diesel engine performance, showing an improvement in engine efficiency and a reduction in harmful emissions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Mohamad Nur Hidayat Mat, Norzelawati Asmuin, Md Faisal Md Basir, Mashhour A. Alazwari, Mohammad Reza Safaei
Summary: This study employed a computational couple simulation approach to investigate the influence of divergent nozzle length on single-hose nozzle geometry. The results revealed a relationship between flow velocity and turbulence flow within the nozzle cavity. Different lengths of divergent nozzles were found to result in varying sound pressure levels and sound power levels.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)