Condensation heat transfer of binary refrigerant mixtures of R22 and R114 inside a horizontal tube with internal spiral grooves

Shigeru Koyama, Akio Miyara, Hiroshi Takamatsu, Tetsu Fujii

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

An experimental study of the condensation of pure and mixed refrigerants of R22 and R114 inside a spirally grooved horizontal copper tube has been carried out. A double-tube counterflow condenser in the pressure range 3-21 bar and at a mass flow-rate 26-70 kg h-1 was used. The axial distributions of refrigerant, tube wall and cooling water temperatures, wall heat flux density and vapour quality are shown graphically. The variation of tube wall temperature around the circumference of the tube is also shown. The local Nusselt number depends on the molar fraction, whereas the average Nusselt number can be correlated by an equation which is modified from a previously established equation for pure refrigerants inside a horizontal smooth tube. The frictional pressure drop evaluated is correlated well by the Lockhart-Martinelli parameters and is independent of the concentration of the mixture.

Original languageEnglish
Pages (from-to)256-263
Number of pages8
JournalInternational Journal of Refrigeration
Volume13
Issue number4
DOIs
Publication statusPublished - Jan 1 1990

Fingerprint

Refrigerants
heat transfer
Condensation
Hot Temperature
Nusselt number
Heat transfer
condensers
Pressure
Temperature
mass flow
vapors
Condenser tubes
Copper
water temperature
cooling
copper
Cooling water
heat
Pressure drop
Water

All Science Journal Classification (ASJC) codes

  • Food Science
  • Mechanical Engineering

Cite this

Condensation heat transfer of binary refrigerant mixtures of R22 and R114 inside a horizontal tube with internal spiral grooves. / Koyama, Shigeru; Miyara, Akio; Takamatsu, Hiroshi; Fujii, Tetsu.

In: International Journal of Refrigeration, Vol. 13, No. 4, 01.01.1990, p. 256-263.

Research output: Contribution to journalArticle

@article{d6c15a21e3624823a492cde7d5ac739c,
title = "Condensation heat transfer of binary refrigerant mixtures of R22 and R114 inside a horizontal tube with internal spiral grooves",
abstract = "An experimental study of the condensation of pure and mixed refrigerants of R22 and R114 inside a spirally grooved horizontal copper tube has been carried out. A double-tube counterflow condenser in the pressure range 3-21 bar and at a mass flow-rate 26-70 kg h-1 was used. The axial distributions of refrigerant, tube wall and cooling water temperatures, wall heat flux density and vapour quality are shown graphically. The variation of tube wall temperature around the circumference of the tube is also shown. The local Nusselt number depends on the molar fraction, whereas the average Nusselt number can be correlated by an equation which is modified from a previously established equation for pure refrigerants inside a horizontal smooth tube. The frictional pressure drop evaluated is correlated well by the Lockhart-Martinelli parameters and is independent of the concentration of the mixture.",
author = "Shigeru Koyama and Akio Miyara and Hiroshi Takamatsu and Tetsu Fujii",
year = "1990",
month = "1",
day = "1",
doi = "10.1016/0140-7007(90)90038-X",
language = "English",
volume = "13",
pages = "256--263",
journal = "International Journal of Refrigeration",
issn = "0140-7007",
publisher = "Elsevier Limited",
number = "4",

}

TY - JOUR

T1 - Condensation heat transfer of binary refrigerant mixtures of R22 and R114 inside a horizontal tube with internal spiral grooves

AU - Koyama, Shigeru

AU - Miyara, Akio

AU - Takamatsu, Hiroshi

AU - Fujii, Tetsu

PY - 1990/1/1

Y1 - 1990/1/1

N2 - An experimental study of the condensation of pure and mixed refrigerants of R22 and R114 inside a spirally grooved horizontal copper tube has been carried out. A double-tube counterflow condenser in the pressure range 3-21 bar and at a mass flow-rate 26-70 kg h-1 was used. The axial distributions of refrigerant, tube wall and cooling water temperatures, wall heat flux density and vapour quality are shown graphically. The variation of tube wall temperature around the circumference of the tube is also shown. The local Nusselt number depends on the molar fraction, whereas the average Nusselt number can be correlated by an equation which is modified from a previously established equation for pure refrigerants inside a horizontal smooth tube. The frictional pressure drop evaluated is correlated well by the Lockhart-Martinelli parameters and is independent of the concentration of the mixture.

AB - An experimental study of the condensation of pure and mixed refrigerants of R22 and R114 inside a spirally grooved horizontal copper tube has been carried out. A double-tube counterflow condenser in the pressure range 3-21 bar and at a mass flow-rate 26-70 kg h-1 was used. The axial distributions of refrigerant, tube wall and cooling water temperatures, wall heat flux density and vapour quality are shown graphically. The variation of tube wall temperature around the circumference of the tube is also shown. The local Nusselt number depends on the molar fraction, whereas the average Nusselt number can be correlated by an equation which is modified from a previously established equation for pure refrigerants inside a horizontal smooth tube. The frictional pressure drop evaluated is correlated well by the Lockhart-Martinelli parameters and is independent of the concentration of the mixture.

UR - http://www.scopus.com/inward/record.url?scp=0025450673&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025450673&partnerID=8YFLogxK

U2 - 10.1016/0140-7007(90)90038-X

DO - 10.1016/0140-7007(90)90038-X

M3 - Article

AN - SCOPUS:0025450673

VL - 13

SP - 256

EP - 263

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

SN - 0140-7007

IS - 4

ER -