Effect of clouds and dust storms on the sky radiation exchange for buildings located in hot–dry climates
| Autor: | Darin W. Nutter, Salem Algarni |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Fluid Flow and Transfer Processes
Environmental Engineering Meteorology media_common.quotation_subject Astrophysics::Instrumentation and Methods for Astrophysics Diffuse sky radiation Storm Astrophysics::Cosmology and Extragalactic Astrophysics Building and Construction Radiation Atmospheric sciences Sky Solar gain Radiative transfer ASHRAE 90.1 Environmental science Roof Astrophysics::Galaxy Astrophysics Physics::Atmospheric and Oceanic Physics media_common |
| Zdroj: | Science and Technology for the Built Environment. 21:403-412 |
| ISSN: | 2374-474X 2374-4731 |
| DOI: | 10.1080/23744731.2014.1000781 |
| Popis: | This article evaluates the impact of effective sky temperatures on building radiation exchange under clear, cloudy, and dusty conditions for extremely hot and dry climates. In part, a dusty sky temperature model has been introduced as a function of atmospheric aerosol optical depth. The sky radiative exchange was evaluated using a one-dimensional transient heat transfer model with numerical calculations performed using the fully implicit finite-difference method. The newly available ASHRAE 2013 clear sky model was evaluated and implemented to calculate the hourly incident solar radiation for a horizontal roof under the extremely hot–dry climate conditions of Riyadh, Saudi Arabia. Results showed that in clear sky conditions, sky longwave radiation contributes to a reduction of the total heat gain. A daily mean clear sky cooling around 2645 and 2385 W-hr/m2 was estimated for July and January, respectively. In contrast, cloud and dust covers increase effective sky temperature and diminish the role of sky rad... |
| Databáze: | OpenAIRE |
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