2016
DOI: 10.1515/aoter-2016-0032
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Performance analyses of helical coil heat exchangers. The effect of external coil surface modification on heat exchanger effectiveness

Abstract: The shell and coil heat exchangers are commonly used in heating, ventilation, nuclear industry, process plant, heat recovery and air conditioning systems. This type of recuperators benefits from simple construction, the low value of pressure drops and high heat transfer. In helical coil, centrifugal force is acting on the moving fluid due to the curvature of the tube results in the development. It has been long recognized that the heat transfer in the helical tube is much better than in the straight ones becau… Show more

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Cited by 31 publications
(12 citation statements)
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“…In recent years, investigations aimed at increasing heat transfer efficiency are of primary importance [1,2]. Reducing the energy requirement of energy-intensive systems and also maximization of energy utilization are common subjects of research [3].…”
Section: Introductionmentioning
confidence: 99%
“…In recent years, investigations aimed at increasing heat transfer efficiency are of primary importance [1,2]. Reducing the energy requirement of energy-intensive systems and also maximization of energy utilization are common subjects of research [3].…”
Section: Introductionmentioning
confidence: 99%
“…Two-phase flows are associated with large rates of heat transfer because of the latent heat of evaporation and enhancement of the turbulence level between the liquid and the solid surface [8,9]. High heat fluxes can also be obtained by means of numerous enhancement technologies [10][11][12]. Predicting heat transfer coefficient and pressure drop is a challenging task, and has been pursued by various research for decades.…”
Section: Introductionmentioning
confidence: 99%
“…Simultaneously with research aimed at enchancing heat transfer by modifying the construction of a thermal apparatus (change of surface roughness, surface development [1], use of flow turbulence elements) or using additional elements in the installation causing the liquid to pulsate or vibrate, numerous works are carried out to change thermophysical properties of conventional working fluids or proposing new products that can replace traditional liquids. In last two decades strong interest in fluids with suspended nanosize solid particles (called nanofluids) results in large number of experimental and numerical studies.…”
Section: Introductionmentioning
confidence: 99%