Heat transfer and sensitivity analysis in a double pipe heat exchanger filled with porous medium

2017 ◽  
Vol 121 ◽  
pp. 124-137 ◽  
Author(s):  
Kamel Milani Shirvan ◽  
Soroush Mirzakhanlari ◽  
Soteris A. Kalogirou ◽  
Hakan F. Öztop ◽  
Mojtaba Mamourian
Keyword(s):  
Heat Transfer ◽  
Sensitivity Analysis ◽  
Porous Medium ◽  
Heat Exchanger ◽  
Double Pipe ◽  
Pipe Heat

scholarly journals Study the Effect of Granules Type of The Porous Medium on The Heat Transfer Enhancement for Double Pipe Heat Exchanger

2019 ◽  
Vol 26 (4) ◽  
pp. 43-49
Author(s):  
Ehsan Abbas ◽  
Shagul Mohammed
Keyword(s):  
Heat Transfer ◽  
Porous Medium ◽  
Heat Exchanger ◽  
Cold Water ◽  
Hot Water ◽  
Transfer Enhancement ◽  
Copper Pipe ◽  
Inner Diameter ◽  
Double Pipe ◽  
Pipe Heat

The current study includes the effect of the type of porous medium on the heat transfer enhancement for double-pipe heat exchanger. Using the three types of the porous medium of balls (steel, ceramic and glass) with diameters (6.35, 6 and 7) mm respectively. The tests were carried out on a locally manufactured heat exchanger, consisting of a copper pipe with an inner diameter (20mm), an outer diameter (22mm) and a length of (1800mm), fixed inside a pipe made of galvanized iron with the same length of copper pipe with inner diameter (50mm) and thickness (5mm). The heat exchanger is insulated with a layer of glass wool to prevent leakage of heat to the area surrounding the exchanger. The tests carried out on the heat exchanger in four cases, the three cases for porous medium, also the case of exchanger without porous medium, and for all cases identical operating conditions, which is inlet temperature of hot, and cold water determined at (63 and 32)˚C and the number of Reynolds from (1100 to 9750) for cold water and (415 to 7500) for hot water. The experimental results showed that the highest thermal conductivity was obtained when the ceramic balls were used, which was estimated to be approximately (219.302) W/˚C and increased by (105.3%, 10.8%, 4.3%) for cases: without porous medium, glass balls and steel balls respectively. The effect of the pressure drop in the hot water side, was recorded the highest value for pressure drop when the ceramic balls were used and ranged from (0.5 to 19.5) mmHg and increased by (0.95%, 2.25%) when compared with the results of two cases for balls (steel and glass) respectively.

3D Numerical Study of Conical and Fusiform Turbulators for Heat Transfer Improvement in a Double-Pipe Heat Exchanger

2021 ◽  
Vol 170 ◽  
pp. 120995
Author(s):  
Qingang Xiong ◽  
Mohsen Izadi ◽  
Mozafar Shokri rad ◽  
S.A. Shehzad ◽  
Hussein A. Mohammed
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Study ◽  
Double Pipe ◽  
Heat Transfer Improvement ◽  
Pipe Heat

scholarly journals Investigation of Overlapped Twisted Tapes Inserted in a Double-Pipe Heat Exchanger Using Two-Phase Nanofluid

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1656 ◽  
Author(s):  
Mehdi Ghalambaz ◽  
Hossein Arasteh ◽  
Ramin Mashayekhi ◽  
Amir Keshmiri ◽  
Pouyan Talebizadehsardari ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Performance Evaluation ◽  
Heat Exchanger ◽  
Evaluation Criterion ◽  
Twisted Tape ◽  
Performance Evaluation Criterion ◽  
Twisted Tapes ◽  
Double Pipe ◽  
Pipe Heat

This study investigated the laminar convective heat transfer and fluid flow of Al2O3 nanofluid in a counter flow double-pipe heat exchanger equipped with overlapped twisted tape inserts in both inner and outer tubes. Two models of the same (co-swirling twisted tapes) and opposite (counter-swirling twisted tapes) angular directions for the stationary twisted tapes were considered. The computational fluid dynamic simulations were conducted through varying the design parameters, including the angular direction of twisted tape inserts, nanofluid volume concentration, and Reynolds number. It was found that inserting the overlapped twisted tapes in the heat exchanger significantly increases the thermal performance as well as the friction factor compared with the plain heat exchanger. The results indicate that models of co-swirling twisted tapes and counter-swirling twisted tapes increase the average Nusselt number by almost 35.2–66.2% and 42.1–68.7% over the Reynolds number ranging 250–1000, respectively. To assess the interplay between heat transfer enhancement and pressure loss penalty, the dimensionless number of performance evaluation criterion was calculated for all the captured configurations. Ultimately, the highest value of performance evaluation criterion is equal to 1.40 and 1.26 at inner and outer tubes at the Reynolds number of 1000 and the volume fraction of 3% in the case of counter-swirling twisted tapes model.

scholarly journals A Conjugate Heat Transfer Analysis of a Triangular Finned Annulus Based on DG-FEM

2018 ◽  
Vol 2018 ◽  
pp. 1-18
Author(s):  
Muhammad Ishaq ◽  
Khalid Saifullah Syed ◽  
Zafar Iqbal ◽  
Ahmad Hassan
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Conjugate Heat Transfer ◽  
Strong Influence ◽  
Heat Transfer Analysis ◽  
Conductivity Ratio ◽  
Geometric Configurations ◽  
Specific Configuration ◽  
Double Pipe ◽  
Pipe Heat

A DG-FEM based numerical investigation has been performed to explore the influence of the various geometric configurations on the thermal performance of the conjugate heat transfer analysis in the triangular finned double pipe heat exchanger. The computed results dictate that Nusselt number in general rises with values of the conductivity ratio of solid and fluid, for the specific configuration parameters considered here. However, the performance of these parameters shows strong influence on the conductivity ratio. Consequently, these parameters must be selected in consideration of the thermal resistance, for better design of heat exchanger.

scholarly journals Heat transfer enhancement of double pipe heat exchanger using rotating of variable eccentricity inner pipe

2018 ◽  
Vol 57 (4) ◽  
pp. 3709-3725 ◽  
Author(s):  
Marwa A.M. Ali ◽  
Wael M. El-Maghlany ◽  
Yehia A. Eldrainy ◽  
Abdelhamid Attia
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Enhancement ◽  
Transfer Enhancement ◽  
Double Pipe ◽  
Pipe Heat

Heat transfer and pressure drop performance of solar glycol/activated carbon based nanofluids in shot peened double pipe heat exchanger

2019 ◽  
Vol 140 ◽  
pp. 580-591 ◽  
Author(s):  
Ganesh Kumar Poongavanam ◽  
Balaji Kumar ◽  
Sakthivadivel Duraisamy ◽  
Karthik Panchabikesan ◽  
Velraj Ramalingam
Keyword(s):  
Heat Transfer ◽  
Activated Carbon ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Double Pipe ◽  
Pipe Heat ◽  
Carbon Based

Computational fluid dynamics (CFD) technique to study the effects of helical wire inserts on heat transfer and pressure drop in a double pipe heat exchanger

2018 ◽  
Vol 128 ◽  
pp. 898-910 ◽  
Author(s):  
Khashayar Sharifi ◽  
Morteza Sabeti ◽  
Mehdi Rafiei ◽  
Amir H. Mohammadi ◽  
Laleh Shirazi
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Computational Fluid Dynamics Cfd ◽  
Double Pipe ◽  
Pipe Heat
Sign in / Sign up

Export Citation Format

Share Document