Ideal tube bank correlations for heat transfer and pressure drop

2017 ◽  
Author(s):  
Jerry Taborek
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Tube Bank

Tube Banks Heat Transfer Enhancement Using Conical Fins

2010 ◽  
Author(s):  
Ignacio Carvajal-Mariscal ◽  
Florencio Sanchez-Silva ◽  
Georgiy Polupan
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Pressure Drop ◽  
Finned Tube ◽  
Hot Water ◽  
Experimental Results ◽  
Tube Bank ◽  
Finned Tubes ◽  
Tube Banks ◽  
Annular Fins

In this work the heat transfer and pressure drop experimental results obtained in a two step finned tube bank with conical fins are presented. The tube bank had an equilateral triangle array composed of nine finned tubes with conical fins inclined 45 degrees in respect with the tube axis. The heat exchange external area of a single tube is approximately 0.07 m2. All necessary thermal parameters, inlet/outlet temperatures, mass flows, for the heat balance in the tube bank were determined for different air velocities, Re = 3400–18400, and one constant thermal charge provided by a hot water flow with a temperature of 80 °C. As a result, the correlations for the heat transfer and pressure drop calculation were obtained. The experimental results were compared against the analytical results for a tube bank with annular fins with the same heat exchange area. It was found that the proposed tube bank using finned tubes with conical fins shows an increment of heat transfer up to 58%.

Prediction of Heat Transfer Rate and Pressure Drop of a Humid Flue-Gas Flow Across a Tube Bank for Waste Heat Recovery

2001 ◽  
Author(s):  
Dong Woon Jeong ◽  
Sang Yong Lee ◽  
Byung Kyu Park
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Pressure Drop ◽  
Heat Transfer Rate ◽  
Flue Gas ◽  
Transfer Rate ◽  
Cooling Water ◽  
Simulation Program ◽  
Tube Bank ◽  
Temperature Variations

Abstract A simulation program taking into account of the mass transfer effect was constructed to estimate the heat transfer rate and the pressure drop of a flow of humid flue gas across a tube bank. Higher heat transfer rate is expected when the flue gas temperature drops below the dew point because of the vapor condensation effect at the external surface of the tubes. The temperature variations of the flue gas and the cooling water and the pressure drop across the tube bank were compared with the experimental data reported previously. The predicted results for the temperature variations without any correction factor agree satisfactorily with the experimental data. As for the shell-side pressure drop, the single-phase friction factor for the tube-bank flow adopted. With this simulation program, the parametric studies have been conducted for various operating conditions, such as the velocities and temperatures of the vapor/gas mixture and the cooling water, the number of the tube-rows, and the conductivity of the wall material.

Numerical Study on Heat Transfer and Fluid Flow Characteristic of Tube Bank with Integral Wake Splitter-Effect of Wake Splitter Length

2013 ◽  
Vol 315 ◽  
pp. 650-654
Author(s):  
Abobaker Mohammed Alakashi ◽  
Hamidon Bin Salleh
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Heat Transfer Coefficient ◽  
Pressure Drop ◽  
Transfer Coefficient ◽  
Flow Characteristic ◽  
Numerical Study ◽  
Heat Transfer Characteristics ◽  
Tube Bank ◽  
Computational Fluid Dynamics Cfd

The purpose of this research is to investigate effect of wake splitter to pressure drop and heat transfer characteristics in a tube bank with staggered arrangements. The pressure drop and averaged heat transfer coefficient of seven rows with five tubes in each row with integral wake splitter has been determined by means of 2-D simulation using commercial computational fluid dynamics (CFD) code Fluent. Two type of integral wake splitter length have been studied, 0.5D and 1D with different location. Simulations have been carried out at Reynolds number based on tube diameter from 5000 up to 27800. The results, presented in terms of pressure drop as well as averaged heat transfer coefficient values, show the influence of wake splitter length and direction. By adding 0.5D wake splitter at downstream direction leads to higher averaged heat transfer coefficient and reduction of the pressure drop.

Two-Dimensional CFD Study on the Enhancement of Tube Bank Configuration Heat Exchanger

2020 ◽  
Author(s):  
Ahmed M. Nagib Elmekawy ◽  
Abdalrahman M. Shahin ◽  
Alaa A. Ibrahim ◽  
Sara Al-Ali
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Flow Behavior ◽  
Plate Thickness ◽  
Cross Flow ◽  
Splitter Plate ◽  
Thickness Variation ◽  
Two Dimensional ◽  
Tube Bank

Abstract Two-dimensional simulations are carried out for a heat exchanger to study the cross-flow behavior in a circular tube bank in a staggered configuration in case of bare cylinders and cylinders with splitter plate attachment. A considerable performance evaluation of the heat exchanger with splitter plate can be achieved by studying the heat transfer and the pressure drop of the flow. Numerical simulation results carried out from this study are compared to experimental results. The numerical investigation has been established to study the effect of splitter plate on the heat exchanger thermal performance as there were no previous studies performed on the optimization of the splitter thickness. The study also illustrates the effect of splitter plate thickness variation on pressure drop and heat transfer for different Reynolds number.

Effect of Blockage-Induced Flow Maldistribution on the Heat Transfer and Pressure Drop in a Tube Bank

1982 ◽  
Vol 104 (4) ◽  
pp. 691-699 ◽  
Author(s):  
E. M. Sparrow ◽  
R. Ruiz
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Pressure Drop ◽  
Percent Level ◽  
Inlet Section ◽  
Tube Bank ◽  
Magnitude Range ◽  
Order Of Magnitude ◽  
Induced Flow ◽  
Flow Maldistribution

Detailed experiments, encompassing per-tube heat-transfer measurements and row-by-row pressure measurements, were performed to investigate the response of a tube bank to maldistribution of the flow at the inlet cross section. The maldistribution was created by a partial blockage of the inlet section. Baseline experiments for uniformly distributed inlet flow were also carried out. The experiments spanned an order of magnitude range in the Reynolds number. On the whole, the inlet-section flow maldistribution tends to enhance the heat transfer at a given Reynolds number, with an accompanying additional pressure drop of about 2 1/2 velocity heads. Enhancements in the 30–40 percent range are encountered in the first several rows in the corridor downstream of the unblocked portion of the inlet section. Reductions (up to 50 percent) are confined to a narrow alley behind the blockage. Ten-percent maldistribution-related effects persist to the seventh row, while effects at the 5 percent level occur at least as far downstream as the twelfth row.

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