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New External Convective Heat Transfer Coefficient Correlations for Isolated Low-rise Buildings by Marcelo G. Emmel; Marc O. Abadie; Nathan Mendes is a Engineering article available to read on EtoBox.

What is New External Convective Heat Transfer Coefficient Correlations for Isolated Low-rise Buildings about?

Building energy analyses are very sensitive to external convective heat transfer coefficients so that some researchers have conducted sensitivity calculations and proved that depending on the choice of those coefficients, energy demands estimation values can vary from 20% to 40%. In this context, computational fluid dynamics calculations have been performed to predict convective heat transfer coefficients at the external surfaces of a simple shape low-rise building. Effects of wind velocity and orientation have been analyzed considering four surface-to-air temperature differences. Results show that the convective heat transfer coefficient value strongly depends on the wind velocity, that the wind direction has a notable effect for vertical walls and for roofs and that the surface-to-air temperature difference has a negligible effect for wind velocity higher than 2 m/s. External convective heat transfer coefficient correlations are provided as a function of the wind free stream velocity and wind-to-surface angle.

Who reads New External Convective Heat Transfer Coefficient Correlations for Isolated Low-rise Buildings?

Author

Marcelo G. Emmel; Marc O. Abadie; Nathan Mendes

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-7788)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)