scholarly journals Experimental Validation of a Compact Double-walled Twisted-Tube Heat Exchanger Concept

2019 ◽  
Author(s):  
Edward David Blandford ◽  
Amir Ali ◽  
Joel Hughes ◽  
Maolong Liu ◽  
Bryan Wallace ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Experimental Validation ◽  
Tube Heat Exchanger ◽  
Twisted Tube

scholarly journals A Numerical Study for a Double Twisted Tube Heat Exchanger

2021 ◽  
Vol 39 (5) ◽  
pp. 1583-1589
Author(s):  
Ali K. Abdul Razzaq ◽  
Khudheyer S. Mushatet
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Study ◽  
Hot Water ◽  
Flow Mode ◽  
Outer Diameter ◽  
Outlet Temperature ◽  
Ansys Fluent ◽  
Tube Heat Exchanger ◽  
Twisted Tube

The thermal and fluid physiognomies of a double twisted tube heat exchanger was examined numerically. Twisted engineering is a wide-use method to improve heat transfer in heat exchangers. A counter-flow mode utilizing hot water in the inner tube and cold air in the outer tube was considered. This study aims to progress the thermal performance of the double tube heat exchanger by using twisted tubes instead of plane tubes. The heat exchanger was (1m) length, outer diameter (0.05m) and inner diameter (0.025m), both with a thickness (0.004m). It was tested for different values of twist ratios (Tr= 5, 10, and 15 respectively) and Reynolds numbers (Re=5000 to 30000). The Navier - Stockes and energy equations besides the turbulence model in demand for modelling this physical problem. ANSYS Fluent code was used for the numerical simulation. The results showed that the twisted tube heat exchanger showed increasing heat transfer compared with a plain tube heat exchanger. It was found that the cold outlet temperature, pressure drop and effectiveness are increased as the twist ratio increases.

Numerical Simulation of Twisted Tube Heat Exchanger for Lead-Cooled Fast Reactor

2021 ◽  
Author(s):  
Wei Xie ◽  
Liangxing Li ◽  
Shuanglei Zhang ◽  
Zhengzheng Zhang
Keyword(s):  
Numerical Simulation ◽  
Heat Exchanger ◽  
Fast Reactor ◽  
Tube Heat Exchanger ◽  
Twisted Tube

Experimental Study of Fouling Resistance in Twisted Tube Heat Exchanger

2012 ◽  
Vol 33 (12) ◽  
pp. 1024-1032 ◽  
Author(s):  
Luai M. Al-Hadhrami ◽  
Aftab Ahmad ◽  
Abdullah Al-Qahtani
Keyword(s):  
Experimental Study ◽  
Heat Exchanger ◽  
Fouling Resistance ◽  
Tube Heat Exchanger ◽  
Twisted Tube

The Design, Analysis, and Fabrication of an Additively Manufactured Twisted Tube Heat Exchanger

2017 ◽  
Author(s):  
John D. Bernardin ◽  
Kyle Ferguson ◽  
David Sattler ◽  
Seung-Jun Kim
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Transfer Coefficient ◽  
Rapid Development ◽  
Steel Shell ◽  
Tube Heat Exchanger ◽  
Twisted Tube ◽  
Overall Heat Transfer Coefficient ◽  
Cfd Analyses

The rapid development of Additive Manufacturing (AM) technologies has provided engineers with new methods to design and fabricate complex mechanisms. AM offers unique methods to allow for integration and simplification of components, reduced manufacturing time, fabrication of complex-shaped objects, improvements upon existing designs, and extending the creative design space which engineers rely on for ingenuity. For many applications, heat exchanger performance can be improved by reducing its size, increasing the overall heat transfer coefficient and surface area, and making more efficient use of the mechanical structure for heat exchange. Traditional manufacturing often limits or prohibits many of these enhancements due to increased manufacturing and assembly costs. This study explored using AM to design and fabricate a compact twisted tube stainless steel shell and tube heat exchanger that would improve upon all of the features just mentioned. This paper discusses the design of the heat exchanger and the AM technique used to fabricate a prototype. The manuscript will show via CFD analyses, how the heat transfer area of the unit was improved 18% and the overall heat transfer coefficient as increased by 40% over a traditional round tube heat exchanger with an identical footprint. Further, the study will show how AM was leveraged to combine five manufacturing steps into one to fabricate a prototype, fully functional twisted tube heat exchanger.

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