A review on the thermal performance of nanofluid inside circular tube with twisted tape inserts

Ahmad, Saadah; Abdullah, Shahrir; Sopian, Kamaruzzaman

doi:10.1177/1687814020924893

Cited by 17 publications

(14 citation statements)

References 105 publications

(130 reference statements)

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“…Twisted short-length tape out-performs full-length-TT in terms of continuous pumping power. TT can be used to increase heat transmission by creating the heatexchangers with laminar flow [5], [25].…”

Section: Insert Tape Twisted When the Flow Is Laminarmentioning

confidence: 99%

“…Because of the rising consciousness for power savings, many researchers have been involved in HT enhancement, because an enlargement in HT rate leads to expanded machine performance [3], [4], this is a requirement for all thermal application systems. HT improvement methodology is categorized into several classes: compound, active, and passive [5]. [6] Experimentally studied the effect of Twisted Tape (TT) in laminar flow.…”

Section: Introductionmentioning

confidence: 99%

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Variation in the enhancement of heat transfer with different fluids using twisted tape inserts

Thote¹,

Singh²

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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This research intends to look into the transformation of heat, factors affecting the friction, and characteristics of the efficacy ratio for the ratio of twist as 3.0, 4.4, and 6.0, independently of a concentric pipe heat exchanger with and without trapezoidal section twisted tape insert. For different Reynold’s Number (Re) ranges of 200-2000, 800-2000, and 2000-12000, experimentation was accomplished to find the transformation of heat energy and aspect of factors of the friction of coaxial tubes. The investigated data from the tube without an insert were compared to the conventional correspondence to assure that the investigation output was valid. The findings of the trapezoidal section twisted tape tube has been in contrast to the simple tube’s results. The consequences reveal that the trapezoidal section twisted tape appreciably improves heat transmission along with friction coefficient. The Trapezoidal section twisted tape enhancement transmission of heat was once additionally judged to be practical because the realized output ratio is maximum than unity. The twisted tape has a greater Nusselt Number (Nu), frictional influence, and overall efficacy attainment than a plain tube, by the research. According to the tapes that have been tested, the tapes with the lowest twist ratio 3.0 are greater fine than the tapes with the other ratio of twist, as a consequence of the fact that the tape with the lowest ratio of twist is the most environmentally friendly at supplying heat augmentation.

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Section: Insert Tape Twisted When the Flow Is Laminarmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variation in the enhancement of heat transfer with different fluids using twisted tape inserts

Thote¹,

Singh²

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…In order to prepare the nano-fluid with a volume concentration of 0.02, with an average diameter of 30 nm and a purity of 99.99% for CuO, TiO2 was used. The mass of the required nanoparticles that is proportional to the specific volumetric concentration is first calculated using the following equation [14].…”

Section: Nano-fluidmentioning

confidence: 99%

“…The thermophysical properties of pure H2O, various base fluids and various nanoparticles which are heat capacity, density, effective dynamic viscosity; effective thermal conductivity and thermal expansion coefficient are given in Table 2. The following equations are used to calculate the density, specific heat, viscosity, and thermal conductivity of the TiO2/H2O and CuO/H2O nanofluid is produced by [15]:…”

Section: Nano-fluid Thermophysical Propertiesmentioning

confidence: 99%

Artificial Neural Networks Modeling of Heat Transfer Characteris-tics in a Parabolic Trough Solar Collector using Nano-Fluids

Salih¹,

Dawood²,

Mutlag³

2021

AJES

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In the current article, an experimental investigation has been implemented of flow and heat transfer characteristics in a parabolic trough solar collector (PTSC) using both nano-fluids and artificial neural networks modeling. Water was used as a standard working fluid in order to compare with two different types of nano-fluid namely, nano-CuO /H2O and nano-TiO2/ H2O, both with a volume concentration of 0.02. The performance of the PTSC system was evaluated using three main indicators: outlet water temperature, useful energy and thermal efficiency under the influence of mass flowrate ranging from 30 to 80 Lt/hr. In parallel, an artificial neural network (ANN) has been proposed to predict the thermal efficiency of PTSC depending on the experimental results. An Artificial Neural Network (ANN) model consists of four inputs, one output parameter and two hidden layers, two neural network models (4-2-2-1) and (4-9-9-1) were built. The experimental results show that CuO/ H2O and TiO2/H2O have higher thermal performance than water. Overall, it was verified that the maximum increase in thermal efficiency of TiO2/H2O and CuO/H2O compared to water was 7.12% and 19.2%, respectively. On the other hand, the results of the model 4-9-9-1 of ANN provide a higher reliability and accuracy for predicting the Thermal efficiency than the model 4-2-2-1. The results revealed that the agreement in the thermal efficiency between the ANN analysis and the experimental results about of 91% and RMSE 3.951 for 4-9-9-1 and 86% and RMSE 5.278 for 4-2-21.

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“…In a laminar flow regime (Recr=2000), they observed that in a mass flow rate of 26.3 kg/s for flue gas and 111.6 kg/s coolant fluid at 1% volume concentration of copper nanofluid in the ethylene glycol base fluid, 9.5% increase was observed in the overall heat transfer coefficient of the nanofluid in comparison with the ethylene glycol base fluid. Ahmad et al (2020) carried out a review on the thermal performance of nanofluid inside circular tube with twisted tape inserts. They summarized 109 of journals from recent research on heat transfer enhancement of nanofluid flowing inside the tube with inserts as well as discussing the significant parameters that affected the system's efficiency such as nanoparticles' volume fraction, Reynolds number and types and configurations of inserts.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Simultaneous Effect of Nanofluid and Tube Insert on the Thermal Performance of an Automobile Cooling System

Yasuri¹,

Soleimani²

2021

JAFM

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In this research, an experimental study is conducted to investigate the effect of simultaneous use of tube insert and nanofluid on the thermal performance of the automotive cooling system (radiator). Al2O3-water based nanofluid is used and the flow regime is laminar (Reynolds 1000-1800). For this study, an experimental automotive cooling system is designed and built. Thermal performance of Al2O3-water nanofluid at three concentrations of 0.1, 0.2 and 0.4% weight fraction of Al2O3-water nanofluid compared to water is monitored by variations of flow rate. In this research, a tube insert with a steel wire rod and a sine profile inside the radiator tube is used as a turbulent-maker. The results show that the sole use of nanofluid, without a tube insert inside the radiator, increases the heat transfer coefficient by about 11%, and the use of a tube insert together with distilled water increases heat transfer coefficient by about 35%. Finally, the use of tube insert together with Al2O3-water based nanofluid at their best mass concentration increases heat transfer coefficient by about 56%.

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A review on the thermal performance of nanofluid inside circular tube with twisted tape inserts

Cited by 17 publications

References 105 publications

Variation in the enhancement of heat transfer with different fluids using twisted tape inserts

Variation in the enhancement of heat transfer with different fluids using twisted tape inserts

Artificial Neural Networks Modeling of Heat Transfer Characteris-tics in a Parabolic Trough Solar Collector using Nano-Fluids

An Experimental Study on the Simultaneous Effect of Nanofluid and Tube Insert on the Thermal Performance of an Automobile Cooling System

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