ESTIMATING SUB-HOURLY SOLAR RADIATION AND EFFECTIVE SKY TEMPERATURE FROM HOURLY WEATHER DATA
Users of whole-building simulation programs spend time
and resources in selecting the most appropriate weather
file for a simulation, whether it be a historical or actual
weather file. However, they rarely check the algorithms
used in the programs to process the weather data into the
components used in the simulation program. This paper
investigates some of the different algorithms used in
popular simulation programs to determine effective sky
temperatures and sub-hourly solar radiation from the
hourly values available in typical weather data
sources. The impact of these algorithmic differences on
the simulation results are highlighted.
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