Performance of CNT-water nanofluid as coolant fluid in shell and tube intercooler of a LPG absorber tower

Hosseini, Seyed Masoud; Vafajoo, Leila; Salman, B.H.

doi:10.1016/j.ijheatmasstransfer.2016.05.071

Cited by 23 publications

(8 citation statements)

References 15 publications

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“…[2]. Furthermore, when it comes to investigating the employment of these types of fluids in intercoolers, there are very few published articles that have covered this topic [79][80][81][82][83].…”

Section: Utilization Of Nanofluids In Intercoolersmentioning

confidence: 99%

“…In addition, the aluminum HE demonstrated a better dynamic response balance between the two working fluids (i.e., compressed gas and coolant) when compared to the other two alternative options. Another study by Masoud Hosseini et al [81] investigated the performance of the intercooler of a liquefied petroleum gas (LPG) absorber tower when utilizing carbon-based nanofluids of low concentrations. The suspensions were made of 0.0055-0.278 vol.…”

Section: Utilization Of Nanofluids In Intercoolersmentioning

confidence: 99%

“…They indicated that their findings can be beneficial for manufacturers in the sense that the heat transfer area of the heat exchanger can be reduced, and this would consequently lower the net production cost of the thermal device. Estellé [82] showed his interest in Masoud Hosseini et al [81]'s published work because it reflects the utilization of nanofluids in an actual industrial application but also argued that the authors [81] should have used a more suitable effective viscosity formula, precisely one that is developed for CNTs and not for spherical Al 2 O 3 particles. He further stated that the accuracy of parameters such as the pressure drop, Re, and heat transfer coefficient would only be affected when modeling nanofluids contained 0.111 vol.…”

Section: Utilization Of Nanofluids In Intercoolersmentioning

confidence: 99%

“…Summary of the published work that was covered in Section 5.The author commented on the previous work of Masoud Hosseini et al[81], where he pointed out that the effective viscosity equation used in the modeling process was inappropriate for the task. This is because the researchers used the formula for dispersed Al 2 O 3 NPs instead of CNTs, which will only affect the results of nanofluids with ≥0.111 vol.…”

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confidence: 99%

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Gas Turbine Intercoolers: Introducing Nanofluids—A Mini-Review

Alsayegh

Ali

2020

Processes

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Coolant is one of the main factors affecting the overall thermal performance of the intercooler for the gas turbine intercooled cycle. The thermal conductivity of conventional coolants, such as water, is relatively low when compared to solid conducting materials, and therefore can hinder the progress towards achieving a compact and highly effective intercooler. Nanofluids are advanced types of working fluids that contain dispersed nanoparticles in conventional basefluids, and as such possess superior thermal conductivity compared to their counterparts. In this paper, a short review on the effect of different nanofluids on the thermal performance of gas turbines intercoolers is presented for the first time. Firstly, this work reviews the different designs of intercoolers used in gas turbines intercooled cycles. Then, it explains the different types of nanofluids and their fabrication processes. The effective parameters, such as physical stability, thermal conductivity, and viscosity are also highlighted and discussed. Furthermore, the level of enhancement in the performance of intercoolers utilizing nanofluids is demonstrated and evaluated. Lastly, the current challenges and future research directions in this field are provided.

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Section: Utilization Of Nanofluids In Intercoolersmentioning

confidence: 99%

Section: Utilization Of Nanofluids In Intercoolersmentioning

confidence: 99%

Section: Utilization Of Nanofluids In Intercoolersmentioning

confidence: 99%

mentioning

confidence: 99%

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Gas Turbine Intercoolers: Introducing Nanofluids—A Mini-Review

Alsayegh

Ali

2020

Processes

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“…Nanofluids are stable suspension of the nanoparticles in a base fluid such as water, ethylene glycol and industrial oils. Nanoparticles can be metallic such as Copper and Silver, metal oxide such as CuO and Al 2 O 3 and nonmetallic such as carbon nanotubes (CNT) and SiC [1]. Nanofluids have been applied in many energy systems, especially renewable energy-based systems [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Movable-Baffle on Heat Transfer and Entropy Generation in a Cavity Saturated by CNT Suspensions: Three-Dimensional Modeling

Al‐Rashed

Aich

Kolsi

et al. 2017

Entropy

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Abstract:Convective heat transfer and entropy generation in a 3D closed cavity, equipped with adiabatic-driven baffle and filled with CNT (carbon nanotube)-water nanofluid, are numerically investigated for a range of Rayleigh numbers from 10 3 to 10 5 . This research is conducted for three configurations; fixed baffle (V = 0), rotating baffle clockwise (V+) and rotating baffle counterclockwise (V−) and a range of CNT concentrations from 0 to 15%. Governing equations are formulated using potential vector vorticity formulation in its three-dimensional form, then solved by the finite volume method. The effects of motion direction of the inserted driven baffle and CNT concentration on heat transfer and entropy generation are studied. It was observed that for low Rayleigh numbers, the motion of the driven baffle enhances heat transfer regardless of its direction and the CNT concentration effect is negligible. However, with an increasing Rayleigh number, adding driven baffle increases the heat transfer only when it moves in the direction of the decreasing temperature gradient; elsewhere, convective heat transfer cannot be enhanced due to flow blockage at the corners of the baffle.

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Polyacrylamide copolymer/aminated carbon nanotube‐based aqueous nanofluids for application in high temperature and salinity

Lima

Amparo

Siqueira

et al. 2018

J of Applied Polymer Sci

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Polymer aqueous nanofluids have numerous industrial applications due to their synergic properties as a polymer and nanoparticle in the same fluid. The main goal of this work was to prepare stable aqueous nanofluids with improved viscosity in high temperature and salinity conditions. Aminated carbon nanotube (OCNT‐TEPA) presented a CN photoemission peak at 285.5 eV in X‐ray photoelectron spectroscopy spectra, which is evidence of a grafting reaction. Fourier transform infrared spectra presented absorption bands attributed to amide and amine bonds. Elemental analyses showed 1.9 and 3.2 mass % N content increases for OCNT‐TEPA and OCNT‐TEPA‐AM, respectively. Samples aged at 70 °C in brine confirmed that the addition of OCNT‐TEPA increased the viscosity of nanofluids to 30% at day 90 compared to acrylamide–acrylic acid copolymer fluids. Nanotubes presented only 35% of the aminated functions compared to carbon black (Lima et al., Carbon 2016, 109, 209) , and their effects in the enhancement of viscosity and thermal and colloidal stability were 2× greater. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46382.

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Performance of CNT-water nanofluid as coolant fluid in shell and tube intercooler of a LPG absorber tower

Cited by 23 publications

References 15 publications

Gas Turbine Intercoolers: Introducing Nanofluids—A Mini-Review

Gas Turbine Intercoolers: Introducing Nanofluids—A Mini-Review

Effects of Movable-Baffle on Heat Transfer and Entropy Generation in a Cavity Saturated by CNT Suspensions: Three-Dimensional Modeling

Polyacrylamide copolymer/aminated carbon nanotube‐based aqueous nanofluids for application in high temperature and salinity

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