Mathematical model of fluid flow and heat exchanger

Perumal, Sakthivel; Rajendrian, Srinivasan; Venkatraman, Vijayan; Sundaresan, Dinesh; Pandiyan, Lakshmanan

doi:10.2298/tsci190412429p

Cited by 55 publications

(7 citation statements)

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“…Double pipe counter water flow heat exchanger with an insert of semicircular disc baffles was used by Sakthivel et al [12] to study the heat transfer and turbulent flow behavior. While comparing smooth tube friction factor, the heat transfer coefficient got increased when the space of baffle is decreased.…”

Section: Literature Reviewmentioning

confidence: 99%

Heat transfer and friction factor characteristics of pipe-in-pipe heat exchanger fitted with varient plain tape insert

Sivasubramaniam¹,

Kavandappa²,

Perumal³

2020

THERM SCI

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The heat exchanger is used to transfer heat between the fluids without mixing them for both cooling and heating processes. Normally the fluids are separated by a solid wall or tube that is made of different materials in order to avoid mixing. The performance of a heat exchanger is predicted on the basis of heat transfer rate. Many new techniques are being explored by industries to improve the heat transfer rate of heat exchangers. In this work, a double tube heat exchanger is used for studying the variation in heat exchange by inserting a flat tape with different geometries: plain tape, plain tape step cut arc, and plain tape step cut rectangle. Experiments are carried out by varying pressure of hot water and the evaluation is done for different mass-flow rates with inlet temperatures of hot and cold water at 53 °C and 30 °C, respectively, under counter-flow arrangements. The experimental results revealed that the plain tape inserts in counter-flow arrangements enhance heat transfer rate substantially thereby increasing the effectiveness of the system for a marginal increase in pressure drop.

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Section: Literature Reviewmentioning

confidence: 99%

Heat transfer and friction factor characteristics of pipe-in-pipe heat exchanger fitted with varient plain tape insert

Sivasubramaniam¹,

Kavandappa²,

Perumal³

2020

THERM SCI

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“…Nano liquids have the accompanying attributes contrasted with the typical liquids. I) higher warmth move between the particvles and liquids because of the great surface space of the particles ii) better scattering dependability iii) lessens molecule obstructing iv) decreased siphoning power when contrasted with base liquid to get comparable warmth move [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of domestic refrigeration system using nanorefrigerant [CeO2+ZnO+R134a]

Govindasamy¹,

Kaliyannan²,

Sadhasivam³

et al. 2022

THERM SCI

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At the present scenario, the action of ensuing the philosophy of reducing energy consumption and saving it for longer period without drop off in performance is increased. On the other hand, global warming and ozone layer depletion become foremost challenges. These concerns are takes place in Thermal systems like refrigerator and air conditioning. To resolve the above challenges, the nano refrigerants are used in refrigeration, which has previously got the attention due to its distinctive properties such as thermal conductivity. They also have the potential to improve the heat transfer performance of refrigeration. This project interrogated on the performance of domestic refrigeration system using normal condenser and microchannel condenser with and without nanoparticles. The Cerium oxide and Zinc oxide nanoparticles in the size of about 20-30nm and 30-50nm respectively with R134a domestic refrigerant were used. The experimentation carried out using 2 gm ofCeO2and ZnO nanoparticles in three different ratios [0.5:1.5,1:1 and 1.5:0.5] with R134a refrigerant. Hereby, the result conquered that 33.3% increase in the Actual COP of domestic refrigeration system using normal condenser with 1:1 ratio of nanoparticles when compared with the refrigeration system using microchannel condenser with and without nanoparticles.

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“…The relative increase in thermal conductivity was recorded to be 65 for 5% mass fraction for Al2O3 and 40 for 5% mass fraction addition of TiO2. Sakthivel et al [14] conducted experiments on paraffin wax and Alumina nanoparticles with mass fractions of 0% and 3%. Their results indicated that the increase of thermal conductivity of paraffin wax was 18.6% with 3 wt% of Alumina.…”

Section: Introductionmentioning

confidence: 99%

Investigations on phase change materials for enhancement of thermal conductivity

et al. 2022

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Experimental work has been undertaken to improve the thermal conductivity of the Phase Change Material (PCM), Paraffin Wax (PW) by adding Alumina and Copper particles in increased mass fractions to elevate thermal energy storage efficiency. Composite PCMs of PW-Alumina and PW-Copper with 5%,10% and 15% mass fractions were prepared by sonication. Morphology of microstructures of PW and composite PCMs were examined using Scanning Electron Microscope (SEM). Thermophysical properties were measured using Standard testing methods. Latent heat and Specific heat were recorded with Differential Scanning Calorimeter (DSC). Thermal conductivity was tested using Two Slab Guarded Hot Plate apparatus. The results showed an improvement in thermal conductivity and latent heat of the composite PCMs. The enhancement ratio of thermal conductivity was 10% and 80% for PW-Alumina and PW-Copper composite PCMs respectively at 15 wt%.

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Mathematical model of fluid flow and heat exchanger

Cited by 55 publications

References 0 publications

Heat transfer and friction factor characteristics of pipe-in-pipe heat exchanger fitted with varient plain tape insert

Heat transfer and friction factor characteristics of pipe-in-pipe heat exchanger fitted with varient plain tape insert

Experimental analysis of domestic refrigeration system using nanorefrigerant [CeO2+ZnO+R134a]

Investigations on phase change materials for enhancement of thermal conductivity

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