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Heat and Mass Transfer

, Volume 50, Issue 6, pp 747–757 | Cite as

Experimental study on the influence of SO2 gas injection to pure liquids on pool boiling heat transfer coefficients

  • M. M. SarafrazEmail author
  • F. Hormozi
  • S. M. Peyghambarzadeh
  • E. Salari
Original
  • 186 Downloads

Abstract

SO2 gas is injected into the different pure liquids using new innovative method via meshed tubes. Many experiments have been performed to investigate the influence of gas injection process on the pool boiling heat transfer coefficient of pure liquids around the horizontal cylinder at different heat fluxes up to 114 kW m−2. Results demonstrate that presence of SO2 gas into the vapor inside the bubbles creates a mass transfer driving force between the vapor phase inside the formed bubbles and liquid phase and also between the gas/liquid interfaces. Local turbulences and agitations due to the gas injection process around the nucleation sites leads the pool boiling heat transfer coefficient to be dramatically enhanced. Besides, some of earlier well-known correlations were unable to obtain the reasonable values for the pool boiling heat transfer coefficients in this particular case. Therefore, the most accurate correlation among the examined correlations was modified to estimate the pool boiling heat transfer coefficient of pure liquids. Experimental data were in a good agreement with those of obtained by the new modified correlation with absolute average deviation of 10 %.

Keywords

Heat Flux Heat Transfer Coefficient Boiling Heat Transfer Pure Liquid Absolute Average Deviation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols

A

Heat transfer area (m2)

Cp

Heat capacity (J kg−1 K−1)

DAB

Diffusion coefficient (m2 s−1)

db

Bubble diameter (m)

FP

See Gorenflo equation in Table 1

Fq

See Gorenflo equation in Table 1

FWM

See Gorenflo equation in Table 1

FWR

See Gorenflo equation in Table 1

g

Gravitational acceleration (m2 s−1)

Hfg

Heat of vaporization (J kg−1)

k

Thermal conductivity (W m−1 K−1)

l*

See Boyko–Krozhilin correlation in Table 1

n

See Gorenflo correlation in Table 1

N

Number of components

P

Pressure (Pa)

q

Heat (W)

Ra

Roughness (m)

s

Distance (m)

T

Temperature (K)

x

Liquid mass or mole fraction

y

Vapor mass or mole fraction

Subscripts

b

Bulk

c

Critical

i

Component

id

Ideal

l

Liquid

o

Reference

r

Reduced

th

Thermocouples

v

Vapor

w

Wall

Greek symbols

α

Heat transfer coefficient (W m−2 °C−1 or W m−2 K−1)

\(\hat{\alpha}\)

Thermal diffusion (m2 s−1)

θ

Contact angle (°)

Difference

ρ

Density (kg m−3)

σ

Surface tension (N m−1)

Notes

Acknowledgments

Authors of this article tend to dedicate this work to Imam Mahdi and appreciate Semnan State University and Islamic Azad University, branch of Mahshahr for their financial supports.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • M. M. Sarafraz
    • 1
    Email author
  • F. Hormozi
    • 1
  • S. M. Peyghambarzadeh
    • 2
  • E. Salari
    • 2
  1. 1.School of Chemical, Petroleum and Gas EngineeringSemnan UniversitySemnanIran
  2. 2.Department of Chemical Engineering, Mahshahr BranchIslamic Azad UniversityMahshahrIran

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