Abstract
Frosting of energy-recovery ventilators results in two major problems: increase of pressure losses and reduction of heat transfer rates. Frost formation of heat and mass exchangers used in these ventilation systems is investigated both experimentally and numerically. A numerical model for the prediction of the thermal behavior of the exchanger is presented. The model is validated with experimental data and is then employed to conduct a parametric study. Results indicate that the absolute humidity is the prevailing parameter for characterizing the frosting phenomenon. A frost-mass-fraction chart is established in terms of the absolute humidity of the warm exhaust stream and of the temperature of the cold supply stream. The effect of time and mass flowrate is also evaluated. The transient three-dimensional model shows that the absolute humidity and the temperature of both air flows vary nonlinearly in the frosted zone.
This is a preview of subscription content, log in via an institution.
Preview
Unable to display preview. Download preview PDF.
References
Holmberg, R. B. (1993) Prediction of Condensation and Frosting Limits in Rotary Wheels for Heat Recovery in Buildings, ASHRAE Transactions, Atlanta, 64–69.
Pfeiffer, S. and Hbner, H. (1987) Untersuchungen zum Einfrieren von Regenerativ-Wrmebertragern, Klima — Kälte — Heizung, 449–452.
Attia, M. H. and D’silva, N. S. (1983) On the Thermal Characteristics and Response Behavior of Residential Rotary Regenerative Heat Exchangers, 14th Sem. International Cent. Heat and Mass Transfer, Hemisphere, 599–611.
Stiesh, G., S. A. Klein and J. W. Mitchell (1995) Performance of Rotary Heat and Mass Exchangers, HVAC&R Research, ASHRAE, Atlanta, 4, 308–324.
Bilodeau, S. (1998) Modelisation experimentale et numerique de la formation du givre dans le roues enthalpiques, Ph.D. Thesis, Université de Sherbrooke, Canada.
Bilodeau, S., Brousseau, P., Lacroix, M., Mercadier, Y. (1998) Frost formation in rotary heat and mass exchangers, International Journal of Heat and Mass Transfer, Pergamon Press, Great Britain, accepted.
Tao, Y. X., Besant, R. W., and Y. Mao (1993) Characteristics of frost growth on a flate plate during the early growth period, ASHRAE Transaction: Symposia, CH-93-2-2, Atlanta, 746–753.
Bilodeau, S., Brousseau, P., Lacroix, M., Mercadier, Y., (1996) Modelling of a Frost Formation in Rotary Heat Regenerator, 5th International Symposium on Thermal Engineering in Cold Regions, Ottawa, 373–378.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1999 Springer-Verlag
About this paper
Cite this paper
Bilodeau, S., Mercadier, Y., Brousseau, P. (1999). Numerical and experimental investigation on frosting of energy-recovery ventilator. In: Hutter, K., Wang, Y., Beer, H. (eds) Advances in Cold-Region Thermal Engineering and Sciences. Lecture Notes in Physics, vol 533. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0104168
Download citation
DOI: https://doi.org/10.1007/BFb0104168
Received:
Accepted:
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-66333-1
Online ISBN: 978-3-540-48410-3
eBook Packages: Springer Book Archive