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Relevant bibliographies by topics / Coiled tubes

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Journal articles

Academic literature on the topic 'Coiled tubes'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Coiled tubes"

1

Akgul, Dogan, Safak Metin Kirkar, Busra Selenay Onal, Ali Celen, Ahmet Selim Dalkilic, and Somchai Wongwises. "Single-phase flow heat transfer characteristics in helically coiled tube heat exchangers." Kerntechnik 87, no. 1 (2022): 1–25. http://dx.doi.org/10.1515/kern-2021-1005.

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Abstract The aim of this review is to present a summary of the published papers of the heat transfer and pressure drop characteristics for single-phase flow in helically coiled tubes. The effect of geometrical parameters such as curvature ratio, coil pitch and working conditions such as Reynolds number, Dean number, flow rate and flow arrangement on heat transfer and pressure drop in helically coiled tubes are determined in the light of the experimental, numerical and analytical studies in the literature. Also, the effect of using nanofluids in comparison with conventional fluids, using enhanc

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2

Abdul- Kareem R. Abed, Hassan Jawdat Fadhiel, Gaydaa Mahsun, and Thabet C. Yassen. "Experimental Study on The Effect of Capillary Tube Geometry on The Performance of Vapour Compression Refrigeration System." Diyala Journal of Engineering Sciences 7, no. 2 (2014): 47–60. http://dx.doi.org/10.24237/djes.2014.07204.

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A domestic refrigerator of 5 ft3 capacity is used to study the effect of coiled diameter and pitch distance of a capillary tube. Five capillary tubes of 2 mm in diameter and 1500 mm length each are used, as same as original capillary tube of the refrigerator. The capillary tubes is formed in five shapes, each one has different coil diameter (D) namely 25, 50, 75, 100 and 125 mm in diameter, in addition three distances between each coil (pitch (P)) is tested, namely 6, 8 and 10 mm. The pressure at inlet and outlet of capillary are measured to calculate the cycle COP, as well as the power consum

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3

INOUE, NORIHIRO, SHINITSU IKU, and KAZUHIDE WATANABE. "PRESSURE DROP AND HEAT TRANSFER INSIDE THE COILED FLOW CHANNEL OF SMOOTH TUBES AND INTERNALLY HELICAL-GROOVED TUBES." International Journal of Air-Conditioning and Refrigeration 20, no. 04 (2012): 1250023. http://dx.doi.org/10.1142/s201013251250023x.

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In this study, we investigated ways of improving the performance of heat exchangers, which are the heat pumps for use in hot-water supply systems on the hot-water supply side. Therefore, we verified experimentally the pressure drop and the heat transfer characteristics within the coiled flow channel. Five smooth copper tubes and five internally helical-grooved copper tubes with an outside diameter of 12.7 mm and coil diameters of 100 mm, 120 mm, 140 mm, 160 mm and 180 mm were used as the heat-transfer coiled tubes in the experiments. Experiments were conducted under conditions of constant isot

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4

Dey, Anshumaan, and Monisha M. Mandal. "Hydrodynamics Study of Oil–Water Flow in Coiled Flow Inverter." Advanced Science, Engineering and Medicine 12, no. 2 (2020): 173–80. http://dx.doi.org/10.1166/asem.2020.2485.

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The present numerical study is an effort to examine the hydrodynamics characteristics of two immiscible liquids (oil and water) flowing in different tubes. i.e., straight, coiled and Coiled Flow Inverter (CFI) tube of equal dimensions. CFI is a novel device in which fluid flow inversion takes place at uniform interval length of tube. The effect of oil-water viscosity ratio (µoil/µwater = 1.6 and 30) on velocity contours, phase distribution and pressure drop in the different tubes were investigated. The present work show that flow pattern of oil–water flows was changed from stratified to annula

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5

Akeedy, Adnan Rasheed, Hajar Alias, and Sami D. Salman. "HEAT TRANSFER ENHANCEMENT USING PASSIVE TECHNIQUE: REVIEW." Jurnal Teknologi 83, no. 2 (2021): 151–62. http://dx.doi.org/10.11113/jurnalteknologi.v83.14546.

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Preserving and saving energy have never been more important, thus the requirement for more effective and efficient heat exchangers has never been more important. However, in order to pave the way for the proposal of a truly efficient technique, there is a need to understand the shortcomings and strengths of various aspects of heat transfer techniques. This review aims to systematically identify these characteristics two of the most popular passive heat transfer techniques: nanofluids and helically coiled tubes. The review indicated that nanoparticles improve thermal conductivity of base fluid

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6

Gao, Weikai, Xiaoyang Xie, Xiaowei Li, and Xinxin Wu. "Influence of Coiling Direction of Helical Tube Bundles on the Thermal-Hydraulics of the HTGR Steam Generator." Journal of Physics: Conference Series 2048, no. 1 (2021): 012032. http://dx.doi.org/10.1088/1742-6596/2048/1/012032.

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Abstract Helical tube bundles were usually adopted in the steam generators (SGs) or intermediate heat exchangers (IHXs) of high temperature gas-cooled reactors (HTGRs). Heat transfer tubes in neighboring tube layers can be coiled in the same direction or in the opposite direction. The coiling direction has influences on the thermal-hydraulic performances of the SGs or IHXs. The cross flow convection over helical tube bundles with neighboring tube layers having the same coiled direction and opposite coiled direction were numerically investigated. Reynolds stress model with standard wall functio

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7

Garimella, S., D. E. Richards, and R. N. Christensen. "Experimental Investigation of Heat Transfer in Coiled Annular Ducts." Journal of Heat Transfer 110, no. 2 (1988): 329–36. http://dx.doi.org/10.1115/1.3250488.

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Forced convection heat transfer in coiled annular ducts was investigated experimentally. Average heat transfer coefficients were obtained for both laminar and transition flows. Two coiling diameters and two annulus radius ratios were used in the study. The data were correlated with Dean number and Reynolds number separately and compared with the available studies of coiled circular tubes and straight annular ducts. It was found that coiling augments the heat transfer coefficients above the values for a straight annulus especially in the laminar region. However, the augmentation is less than wo

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8

Haryoko, Luthfi A. F., Jundika C. Kurnia, and Agus P. Sasmito. "Numerical Investigation of Subcooled Boiling Heat Transfer in Helically-Coiled Tube." International Journal of Automotive and Mechanical Engineering 17, no. 1 (2020): 7675–86. http://dx.doi.org/10.15282/ijame.17.1.2020.15.0570.

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Subcooled boiling heat transfer in helically-coiled tubes offers better heat transfer performance than any other types of boiling processes due to its ability to capture high heat flux with a relatively low wall superheat. This study investigates turbulent subcooled forced convection boiling performances of water-vapour in a helically-coiled tube with various operating conditions i.e. operating pressure, heat, and mass flux. Developed CFD model is validated against previously published experimental results using the RPI model. The model is developed based on the Eulerian-Eulerian framework cou

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9

Mishani, Siamak, Brian Evans, Vamegh Rasouli, Reem Roufail, Soren Soe, and Peter Jaensch. "Interlaminar modelling to predict composite coiled tube failure." APPEA Journal 55, no. 1 (2015): 361. http://dx.doi.org/10.1071/aj14029.

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In a field operation that uses coiled tubing in its applications, fibre-reinforced polymer matrix composite tubing is seldom used. Fibre-composite coiled tubes offer advantages, compared to steel material, through a reduction in weight and improvement in fatigue life. The stiffness of composite material degrades progressively when increasing the number of cyclic loading. The fatigue damage and failure criteria of fibre-reinforced composite coiled tubes are more complex than that of steel; hence, failure predictions are somewhat unreliable. Among the defects in composite materials, interlaminar

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10

Quinlan, R. A., and M. Stewart. "Crystalline tubes of myosin subfragment-2 showing the coiled-coil and molecular interaction geometry." Journal of Cell Biology 105, no. 1 (1987): 403–15. http://dx.doi.org/10.1083/jcb.105.1.403.

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We have produced crystalline tubes of chicken breast myosin long subfragment-2 that show order to resolutions better than 2 nm. The tubes were formed from a thin sheet in which the myosin long subfragment-2 molecules were arranged on an approximately rectangular crystalline lattice with a = 14.1 +/- 0.2 nm and b = 3.9 +/- 0.1 nm in projection. Shadowing indicated that the tube wall was approximately 7 nm thick and that the sheets from which it was formed followed a right-handed helix. Superposition of the lattices from the top and bottom of the tube produced a moire pattern in negatively stain

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