A comprehensive review of heat transfer enhancement and flow characteristics in the concentric pipe heat exchanger

2021 ◽  
pp. 117037
Author(s):  
Haojie Li ◽  
Yuan Wang ◽  
You Han ◽  
Wenpeng Li ◽  
Lin Yang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Enhancement ◽  
Flow Characteristics ◽  
Transfer Enhancement ◽  
Comprehensive Review ◽  
Pipe Heat

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

scholarly journals HEAT TRANSFER ENHANCEMENT AND PRESSURE DROP OF GROOVED ANNULUS OF DOUBLE PIPE HEAT EXCHANGER

2017 ◽  
Vol 57 (2) ◽  
pp. 125 ◽  
Author(s):  
Putu Wijaya Sunu ◽  
I Made Rasta
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Heat Transfer Enhancement ◽  
Volume Flow Rate ◽  
Reynold Number ◽  
Transfer Enhancement ◽  
Cold Fluid ◽  
Double Pipe ◽  
Pipe Heat

This investigation was performed to experimentally investigate the enhancement of heat transfer and the friction of an annulus in a double pipe heat exchanger system with rectangular grooves in the turbulent flow regime. The shell is made of acrylic and its diameter is 28 mm. The tube is made of aluminium and its diameter is 20 mm. Grooves were incised in the annulus room with a circumferential pattern, with a groove space of 2 mm, a distance between the grooves of 8mm and a groove height of 0.3 mm. The experiments consist of temperature and pressure measurement and a flow visualization. Throughout the investigation, the cold fluid flowed in the annulus room. The Reynold number of cold fluid varied from about 31981 to 43601 in a counter flow condition. The volume flow rate of hot fluid remains constant with Reynold number about 30904. Result showed the effect of grooves, which are applied in the annulus room. The grooves induce the pressure drop, the pressure drop in the grooved annulus was greater by about 15.88% to 16.72% than the one in the smooth annulus. The total heat transfer enhancement is of 1.09–1.11. Moreover, the use of grooves in the annulus of the heat exchanger not only increase the heat transfer process, but also increase the pressure drop, which is related to the friction factor.

Effect of vibrator position and frequency on heat transfer enhancement in counter flow concentric pipe heat exchanger

2020 ◽  
Vol 17 (5) ◽  
pp. 751-760
Author(s):  
Shanmukh Sudhir Arasavelli ◽  
Ramakrishna Konijeti ◽  
Govinda Rao Budda
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Heat Exchanger ◽  
Heat Transfer Enhancement ◽  
Hot Water ◽  
Transfer Enhancement ◽  
Counter Flow ◽  
Pipe Length ◽  
Content Type ◽  
Pipe Heat

Purpose This paper aims to deal with heat transfer enhancement because of transverse vibration on counter flow concentric pipe heat exchanger. Experiments were performed at different vibrator positions with varying amplitudes and frequencies. Design/methodology/approach Tests are carried out at 4 different vibration frequencies (20, 40, 60 and 100 Hz), 3 vibration amplitudes (23, 46 and 69 mm) and at 3 vibrator positions (1/4, 1/2 and 3/4 of pipe length) with respect to hot water inlet under turbulent flow condition. Findings Experimental results indicate that Nusselt number is enhanced to a maximum extent of 44% with vibration when compared to Nusselt number without vibration at a frequency of 40 Hz, an amplitude of 69 mm and at a vibrator position of one-fourth of pipe length with respect to hot water inlet. Originality/value Empirical correlation is developed from experimental data to estimate the heat transfer coefficient with vibration for experimental frequency range with an error estimate of approximately ±10%.

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