Experimental Investigation of Heat Transfer and Flowing Resistance for Air Flow Cross over Spiral Finned Tube Heat Exchanger

He, Fajiang; Cao, Wanlin; Yan, Peng

doi:10.1016/j.egypro.2012.02.166

Cited by 32 publications

(13 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4 depicts the comparison of Nu and the friction factor correlation equations for different Reynolds number. The Nu of present results shows good agreement with experimental correlations proposed by FaJiang et al [29] and Hofmann et al [30]. A decreasing trend of the friction factor is observed with increasing Reynolds numbers.…”

Section: Grid Independence Test and Validationsupporting

confidence: 92%

Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger

2019

View full text Add to dashboard Cite

The present study conducts the numerical investigation of flow characteristics and thermal performance of spiral finned-tube heat exchangers. The effects of location of perforations (90°, 120°, and 150°) on heat transfer and pressure drop are analyzed for the air-side. The commercial computational fluid dynamics code ANSYS Fluent (V.17.0) is used for simulations with the RNG k-ε model based on the Reynolds-averaged Navier–Stokes equations. The velocity field, Colburn j-factor, and friction factor are analyzed to evaluate the heat transfer and pressure drop characteristics. Because of the flow through the perforations, the boundary layers on the fin surfaces are interrupted. This results in increased flow disturbances close to the fin, and the heat transfer performance increases compared to the reference case. The pressure drop, which is one of the disadvantages of spiral finned tubes comparing to plate or circular fins, decreases with perforations on the fin. Overall, the cases with perforated fin exhibit greater performance of area goodness factor considering the relationship between the heat transfer and the pressure drop.

show abstract

Section: Grid Independence Test and Validationsupporting

confidence: 92%

Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger

2019

View full text Add to dashboard Cite

show abstract

“…The influence of the specific shape and the geometric parameters of the ducts on the fluid temperature field has been noticed. This affects the values of the average temperature difference in cross-section, and respectively the values of the heat convection coefficients, calculated by equations (1) and (2).…”

Section: Methodsmentioning

confidence: 99%

“…The heat flows, heat convection coefficients and overall heat transfer coefficients, have been calculated. The research [2] focuses on the experimental determination of dependencies between certain criterion parameters, used for calculations of a heat exchanger with spirally finned tubes. In [3] is presented the methodology of experimental determination of heat convection coefficients and heat flows in a two-pipe heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of heat convection processes in the ducts of two-stage heat exchanger

Kolev

Kadirova

2021

E3S Web Conf.

View full text Add to dashboard Cite

The paper presents results from numerical modelling in ABAQUS of heat convection processes in the ducts of two-stage “water to air” heat exchanger, used as a heat consumer in reversible heat pump installation. A comparison between the values of heat convection coefficient has been done, as they have been determined on the basis of simulation results, and criterion equations. The heat convection processes have been modelled on the base of boundary conditions, determined by measuring of main parameters. The computing mesh has been verified on the basis of certain temperature values, by successively increasing the number of computing cells. The heat convection processes in the ducts of the heat exchanger have been simulated in “heating” and “cooling” modes of the installation. The study has been performed in laboratory conditions.

show abstract

“…The heat flow, heat transfer coefficient and overall heat transfer coefficient, have been determined at different velocities of the water flow in tubes, and different velocities of the air flow, which crosses the tubes. Experimental investigation of spiral finned tube heat exchanger has been considered in [7]. Different fin pitch, fin height, transverse tube pitch, and longitudinal tube pitch, have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of the thermal conduction process in water-air convector’s fins

Kolev

Kadirova

2020

E3S Web Conf.

View full text Add to dashboard Cite

The paper presents results from numerical modelling of thermal conduction process in ABAQUS. The computing mesh of the model has been verified. Based on the simulation results, the average temperature of the heat exchanger’s external surface and the external heat convection coefficient have been determined. The process of thermal conduction in the fins is modelled on the basis of boundary conditions, which values are obtained by simulation of the heat convection process in the convector’s pipes. The average heat parameters have been determined relative to the first, middle and last fins, by developing a geometric model in ABAQUS. The computing mesh has been verified by increasing the number of cells and nodes. The external heat convection coefficient is calculated by Newton's law.

show abstract

Experimental Investigation of Heat Transfer and Flowing Resistance for Air Flow Cross over Spiral Finned Tube Heat Exchanger

Cited by 32 publications

References 1 publication

Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger

Influence of Perforated Fin on Flow Characteristics and Thermal Performance in Spiral Finned-Tube Heat Exchanger

Numerical modelling of heat convection processes in the ducts of two-stage heat exchanger

Numerical modeling of the thermal conduction process in water-air convector’s fins

Contact Info

Product

Resources

About