Experimental study on saturated flow boiling heat transfer of R290/R152a binary mixtures in a horizontal tube

Xin ZOU, Maoqiong GONG, Gaofei CHEN, Zhaohu SUN, Jianfeng WU

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PDF(402 KB)
Front. Energy ›› 2010, Vol. 4 ›› Issue (4) : 527-534. DOI: 10.1007/s11708-010-0109-7
RESEARCH ARTICLE
RESEARCH ARTICLE

Experimental study on saturated flow boiling heat transfer of R290/R152a binary mixtures in a horizontal tube

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Abstract

An experimental study on the saturated flow boiling heat transfer for a binary mixture of R290/R152a at various compositions is conducted at pressures ranging from 0.2 to 0.4 MPa. The heat transfer coefficients are experimentally measured over mass fluxes ranging from 74.1 to 146.5 kg/(m2·s) and heat fluxes ranging from 13.1 to 65.5 kW/m2. The influences of different parameters such as quality, saturation pressure, heat flux, and mass flux on the local heat transfer coefficient are discussed. Existing correlations are analyzed. The Gungor-Winterton correlation shows the best fit among experimental data for the two pure refrigerants. A modified correlation for the binary mixture is proposed based on the authors’ previous work on pool boiling heat transfer and the database obtained from this study. The result shows that the total mean deviation is 10.41% for R290/R152a mixtures, with 97.6% of the predictions falling within±30%.

Keywords

flow boiling / heat transfer / binary mixture / R290/R152a

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Xin ZOU, Maoqiong GONG, Gaofei CHEN, Zhaohu SUN, Jianfeng WU. Experimental study on saturated flow boiling heat transfer of R290/R152a binary mixtures in a horizontal tube. Front Energ Power Eng Chin, 2010, 4(4): 527‒534 https://doi.org/10.1007/s11708-010-0109-7

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 50890183).
Notation
Cpspecific heat/(J·kg-1·K-1)
dhhydraulic diameter/m
Eenhancement factor
Gmass flux/(kg·m-2·s-1)
hheat transfer coefficient/(kW·m-2·K-1)
Hlvlatent heat/(J·kg-1)
kthermal conductivity/(W·m-1·K-1)
Llength of channel/m
M/(g·mol-1)molecular weight
mmass flow rate/(kg · s-1)
ppressure/Pa
prreduced pressure
PrPrandtl number
qheat flux/(kW·m-2)
Qheat input/W
ReReynolds number
Ssuppression factor
Ttemperature/K
Tbbubble point temperature/K
Tddew point temperature/K
ΔTidideal temperature difference/K
ΔTdbboiling range, defined as the temperature difference between dew point and bubble point/K
Xvapor quality
xliquid mole fraction of more volatile component
xMliquid composition based on mass of more volatile component
yvapor mole fraction of more volatile component
μviscosity/(Pa·s)
ρdensity/(kg·m-3)
σsurface tension/(N·m-1)
1the more volatile component
2the less volatile component
aveaverage
expexperiment
iideal
ininlet
lliquid
mmixture
nbnucleate boiling
prepredict
satsaturation
spsingle-phase
tptwo-phase
vvapor
wwall

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