Experimental Study on Frost Height of Round Plate Fin-Tube Heat Exchangers for Mobile Heat Pumps
Abstract
:1. Introduction
2. Experimental Setup
2.1. Test Specifications
2.2. Frost Height Measurement
Parameter | Value |
---|---|
Fin space (mm) | 4.0/6.0/8.0/10.0/12.0 |
Fin diameter (mm) | 23.0 |
Fin thickness (mm) | 0.15 |
Tube outer diameter (mm) | 8.2 |
Tube thickness (mm) | 0.5 |
Tube length (mm) | 650.0 |
Materials for a fin and a tube | Aluminum |
Inlet air temperature (°C) | 5.0/8.0/11.0 |
Inlet air relative humidity (%) | 50/60/70/80 |
Airflow rate (m3/min) | 0.6/0.8/1.0/1.2 |
Ethylene glycol-water mixture inlet temperature (°C) | −15.0 |
3. Results
3.1. Boundary Layer
3.2. Frost Growth
4. Summary and Conclusion
Nomenclature
Ff | Fin space (mm) |
L | Appropriate characteristic length (mm) |
T | Temperature (°C) |
Xs | Frost layer height (mm) |
Greek symbols
δ | Boundary layer thickness |
r | Radius (mm) |
γ | Blockage ratio (%) |
u | Velocity component in x direction (mm/s) |
v | Velocity component in y direction (mm/s) |
x | X-axis |
y | Y-axis |
Subscripts
c | current |
crit | critical |
s | surface |
∞ | free stream |
Acknowledgments
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Lee, M.-Y.; Kim, Y.; Lee, D.-Y. Experimental Study on Frost Height of Round Plate Fin-Tube Heat Exchangers for Mobile Heat Pumps. Energies 2012, 5, 3479-3491. https://doi.org/10.3390/en5093479
Lee M-Y, Kim Y, Lee D-Y. Experimental Study on Frost Height of Round Plate Fin-Tube Heat Exchangers for Mobile Heat Pumps. Energies. 2012; 5(9):3479-3491. https://doi.org/10.3390/en5093479
Chicago/Turabian StyleLee, Moo-Yeon, Yongchan Kim, and Dong-Yeon Lee. 2012. "Experimental Study on Frost Height of Round Plate Fin-Tube Heat Exchangers for Mobile Heat Pumps" Energies 5, no. 9: 3479-3491. https://doi.org/10.3390/en5093479