Numerical Approximation of Heat Transfer Increased in Tube Heat Exchanger Using Inner Tube Channelled and Twisted Tape
Keywords:
Tube in Tube Heat Exchanger, Corrugated Tube, Nusselt Number, Euler’s Number, ConvectionAbstract
The examination work summed up in this presents a Numerical
examination of different parts of Heat move, pressure drop and
adequacy in a twofold channel heat exchanger made of ridged
internal cylinders.The inward cylinder was ridged. different courses
of action are made having crease dia7.5mm and 5mm and
longitudinal pitch 20mm and 30mm of curved layered cylinder were
explored, the turned tape with longitudinal Pitch 50mm is
acquainted in internal cylinder with investigate improvement in heat
move. Counter stream heat exchanger arrangement is displayed
utilizing Design Modeler.Warmth move coefficient was resolved
utilizing articulation adding machine utilizing Ansys Fluent 18.1. High
temp water (inward cylinder) andcold water (external cylinder) delta
temperatures were kept up at around 600 C and 280 C individually.
Tests were performed over the Reynolds number scope of 300-1500,
in light of the water driven distance across of the annular space
between the two cylinders. Boiling water Reynolds number was kept
steady at around 700.Results showed that the inward cylinder
foldings and game plan kind of layered cylinders have critical impact
on warm and frictional qualities. Most extreme adequacy was
acquired for heat exchanger made of sunken creased internal
cylinder with dia.7.5 mm and 20 mm longitudinal pitch. Presentation
of Twisted tape brings about the ascent in pressure drop with
exceptionally less temperature angle. Stream is pictured utilizing
Ansys Fluent 18.1 Post Processor.
References
Huai-Zhi Han, Bing-Xi Li, Hao Wu et al.Multi-objective
shape optimization of double pipe heat exchanger with
inner corrugated tube using RSM method. International
Journal of Thermal Sciences 2015; (90): 173-186.
Dizaji HS, Jafarmadar S, Mobadersani F. Experimental
studies on heat transfer and pressure drop
characteristics for new arrangements of corrugated
tubes in a double pipe heat exchanger. International
Journal of Thermal Sciences 2015;(96): 211-220.
Gómez MA, Collazo J, Porteiro J et al. Numerical study
of the thermal behaviour of a water heater tank with
a corrugated coil. International Journal of Heat and
Mass Transfer 2018: 122: 574–586.
Dizaji HS, Jafarmadar S, Mobadersani F. Experimental
studies on heat transfer and pressure drop
characteristics for new arrangements of corrugated
tubes in a double pipe heat exchanger. International
Journal of Thermal Sciences 2015; 96: 211-220
Córcoles-Tenderoa JI, Belmonte JF, Molina AEet al.
Numerical simulation of the heat transfer process in
a corrugated tube. International Journal of Thermal
Sciences 2018; 126: 125–136.
Bozzoli F, Cattani L, Rainieri S. Effect of wall corrugation
on local convective heat transfer in coiled tubes’
International Journal of Heat and Mass Transfer 2016;
: 76–90.
Wang W, Zhang Y, Yongji Li et al. Multi-objective
optimization of turbulent heat transfer flow in novel
outward helically corrugated tubes. Applied Thermal
Engineering ATE 11601: 2017
Xuemei Su, Xingya Chen, Jionghui Liu et al. Experimental
investigation of forced flow boiling of nitrogen in a
horizontal corrugated stainless steel tube’ Cryogenics
; 70: 47–56.
Samruaisin P, Changcharoen W, Thianpong C et al.
Influence of regularly spaced quadruple twisted tape
elements on thermal enhancement characteristics,
Chemical Engineering and Processing - Process
Intensification (2010).
Suri ARS, Kumar A, Maithani R. Effect of square wingsin multiple square perforated twisted tapes on fluid
flow and heat transfer of heat exchanger tube. Case
Studies in Thermal Engineering 2017; 10: 28–43.
Lim KY, Hung YM, Tan BT. Performance evaluation of
twisted-tape insert induced swirl flow in a laminar
thermally developing heat exchanger. Applied Thermal
Engineering (2017)
