Heat and Mass Transfer

, Volume 51, Issue 3, pp 373–379 | Cite as

Experimental investigation on heat transfer analysis of conical coil heat exchanger with 90° cone angle

  • Pramod S. Purandare
  • Mandar M. Lele
  • Raj Kumar Gupta
Original

Abstract

In the present study, an experimental investigation on thermal performance of the conical coil heat exchanger with 90° conical coil heat exchanger is reported. Three different conical coil heat exchangers of same mean coil diameter (Dm = 200 mm) with different tube diameters (di = 8, 10, 12.5 mm) are analyzed under steady state condition. The analysis is carried out for the tube side hot fluid flow range of 10–100 lph (Re = 500–5,000), while the shell side flow range of 30–90 lph. The data available from experimentation leads to evaluate heat transfer coefficients for inside and outside the tube of the conical coil heat exchanger by Wilsons plot method. The calculations are further extended to estimate Nusselt Number (Nu) and effectiveness. The empirical correlations are proposed for predicting Nu and the outlet temperatures of hot and cold fluids. The predicted empirical correlations show reasonable agreement with the experimental results within the given range of parameters.

List of symbols

d

Tube diameter (m)

D

Coil diameter (m)

h

Heat transfer coefficient (W/m2K)

k

Thermal conductivity (W/mK)

L

Tube length (m)

r

Tube radius (m)

R

Radius of curvature (m)

v

Velocity of water (m/s)

Z

Mass flow ratio (M h /M c )

C

Heat capacity of hot fluid (kW/K)

M

Mass of water (kg)

U

Overall heat transfer coefficient (W/m2K)

Ac

Cross section area of pipe (m2)

Є

Effectiveness

LMTD

Log mean temperature difference

Nu

Nusselt number

Re

Reynolds number

Pr

Prandtl number

De

Dean number

Subscripts

i

Inside condition

o

Outside condition

c

Cold fluid

h

Hot fluid

Greek letters

ρ

Density (kg/m3)

µ

Viscosity (Ns/m2)

δ

Curvature ratio (r/R)

Notes

Acknowledgments

Authors would like to express their heartily thanks to the Principal and Dean (Research), of Vishwakarma Institute of Information Technology, Pune, for there continuous support to carry out this research work.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Pramod S. Purandare
    • 1
  • Mandar M. Lele
    • 2
  • Raj Kumar Gupta
    • 3
  1. 1.Department of Mechanical EngineeringThapar UniversityPatialaIndia
  2. 2.Department of Mechanical EngineeringMaharashtra Institute of TechnologyPuneIndia
  3. 3.Department of Chemical EngineeringThapar UniversityPatialaIndia

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