The Effectiveness of Jet Impingement Cooling System on Various Flat Plate Surface

Aiman, Y.; Firdaus, M. A.; Musa, Md. Nor; Syahrullail, S.

doi:10.5109/4372277

Cited by 6 publications

(6 citation statements)

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“…This approach entails the examination of all potential aspects that might have contributed to the degradation of structural strength. Typically, major sources of failure arise from issues such as incorrect design, manufacturing defects, improper operational parameters, and incorrect material specifications 3,[13][14][15] . In this particular study, design and manufacturing aspects were not scrutinized, as the unit's reliability had already been confirmed by the owner before installation, affirming the integrity of these two factors.…”

Section: Methodsmentioning

confidence: 99%

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Suhadi,

Aprilio,

Febriyanti

2023

Evergreen

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Heat exchangers, crucial equipment in oil and gas refinery facilities, play a pivotal role in ensuring reliable energy production. Any structural issues with these heat exchangers can disrupt production and potentially lead to energy supply interruptions. The aim of this research is to investigate the degradation of structural strength in heat exchangers that occurs during their operational lifespan. Several tests, including hardness, metallography, chemical analysis, tensile testing, and SEM analysis, were conducted to assess the condition of the heat exchanger tubes. The results revealed that the tubes had become coated with deposits that reacted with the tube walls, resulting in rust formation. Consequently, the walls of the tubes underwent thinning, ultimately leading to leaks. In conclusion, the structural strength degradation of the heat exchanger tubes was primarily caused by corrosion occurring beneath these deposits.

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Section: Methodsmentioning

confidence: 99%

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Suhadi,

Aprilio,

Febriyanti

2023

Evergreen

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“…Before introducing nano fluid to improve performance of the thermal devices, it is necessary to analyse the geometrical parameters. In geometrical domain some investigation has been done to perform thermal or heat transfer analysis on various exchangers elements and parameters like analysis on diverse absorber plate shape 2,3,4,5) , specifically HVAC duct 6) , Ventilators 7) , flat surfaces 8) and tubes of different shape and size in solar air heater and collectors 2,3,4,5) , effect of perforation, shape and size of tapered hollow conical rings 9) , analysis the effect of helical coil, plain tubes, bundle of tubes with or without roughness in shell-tube type heat exchanger 10,11,12,13) , micro-channel 14,15,16,17) , mini channels 18,19) , analysis of number/location of fins in LED 20) with diverse fluids like air, water and nano fluid, 20,21,22) , nano-lubricant, bio-lubricants, bio-oils 61) , green bio-glycol nano fluid 23,24,25,26,60) , nano-fluidic or refrigerant 27,28) . Some researchers performed work on thermal storage with diverse material characterized as sensible materials under packed bed related to thermal storage like clay, dry clay, nylon 6 etc.…”

Section: Introductionmentioning

confidence: 99%

Comparative Experimental and CFD Analysis of Fluid Flow Attributes in Mini Channel with Hybrid CuO+ZnO+H_2O Nano Fluid and (H_2O) Base Fluid

Kaushik¹,

Uniyal²,

Verma³

et al. 2023

Evergreen

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Comparative study is carried out between nano fluid (nf) CuO+ZnO+H2O and water (H2O) as solitary fluid through experimental and simulation result. The outcome of nano fluid and solo H2O flowing inside rectangular strip mini channel with or without mini insert were admit, for study the conduct of fluid flow and heat-exchange features like Nusselt number (Nu), Friction factor (f), Effectiveness (Ɛ), Coefficient of thermal transfer (h), Heat transfer factor (Q), Nu/Nus, f/fs, thermal-performance factor (TPF), Number of transferring unit (NTU) and Reynolds's number (Re). During composing of nano fluid 0.01% volume fraction, 10-20 nm size nano particles were mixed with 0.5ml CTAB surfactant. Experimentation was managed for different operating parameters under counter flow conditions, where nano fluid is flowing inside mini channel of 2 mm diameter with flow rate 0.0001562 kg/sec (9.37 ml/min) to 0.006255 kg/sec (375.30 ml/min) and hot water is flowing inside the concentric tube of 3cm diameter with flow rate of 0.000782 kg/sec (46.92 ml/min). The operating temperature of nano fluid and hot water were 303K and 323K. As per obtained results, the proposed composition of nanofluid showed better performance than normal water due to better thermal conductivity and extra molecular area gain in nanofluid due to addition of nano particle with base fluid, Thus, it improved the results 18%-21% approximately. Whereas better optimum results were observed in case of rectangular mini channel with mini insert compared with other geometry because of rich turbulency gain and extra exposed area due to mini insert. It affects optimum results in terms of better performance up to 9%-15% compared with simple micro channel without inserts.

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“…During machining, CO2 is supplied at high velocity through a nozzle directly to the tool-workpiece interface. According to Aiman et al [13], this approach is a convection-based heat transfer method and is very effective to improve the efficiency of local heat transfer and reduce cutting temperature. Significantly, temperature-dependent output such as tool wear rate and surface finish improved as well.…”

Section: Introductionmentioning

confidence: 99%

The correlation of surface roughness and tool edge condition under sustainable cryogenic machining

Halim

Haron

Ghani

et al. 2023

JMES

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This paper investigates the correlation between surface roughness of Inconel 718 and tool edge condition of ball nose inserts when milled at high speed. The cutting parameters were varied as follows; cutting speed: 120–140 m/min, feed rate: 0.15–0.25 mm/tooth, and axial depth of cut: 0.3–0.7 mm. For a sustainable machining approach, the experimental works were carried out under a smooth supply of cryogenic coolant which is a mix of liquid CO2, gas CO2, and compressed air. The experimental results revealed that the range of surface roughness obtained is from 0.114 to 0.197 µm. Along the cutting process, the tool wear patterns such as the abrasion, chipping, and the intermittent build-up-edge near the depth of cut cause the rapid increase of tool wear as well as the roughness of the machined surface with a significant correlation between them. However, the roughness was slowly reduced and became stable with the increase of notch wear. The finding could be used as a prediction reference for monitoring surface roughness and tool wear progress under cryogenic conditions. It also provides foundations for further research on machinability under this sustainable approach.

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The Effectiveness of Jet Impingement Cooling System on Various Flat Plate Surface

Cited by 6 publications

References 0 publications

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Structural Strength Degradation of Oil and Gas Refinery Equipment. Case Study: Heat Exchanger Tubes of Hydrocarbon Vapor

Comparative Experimental and CFD Analysis of Fluid Flow Attributes in Mini Channel with Hybrid CuO+ZnO+H_2O Nano Fluid and (H_2O) Base Fluid

The correlation of surface roughness and tool edge condition under sustainable cryogenic machining

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