28 FEBRUARY 2003
DATA SET PAGES 15 AND 16: SOLAR RADIATION DATA. Figures 2-15
and 2-16 are samples of Data Set Page 15 and Data Set Page 16, respectively.
Explanation of Charts
Data Source. This data is reproduced courtesy of the National Renewable
Energy Laboratory (NREL). The data were first published in the NREL's Solar Radiation
Data Manual for Buildings (1995). The user should refer to that publication for a
complete description of how to use this data. The manual can be accessed online at
http://www.osti.gov/bridge by searching for "NREL/TP--463-7904."
Site Location. The site used in each station record is the nearest
NREL-published site available within a 1.5 latitude radius from the requested location.
Consequently, some sites may be several miles away, and in some cases, the NREL
location may be in a neighboring state. Use caution when the nearest site available is
not in the same city as the requested location, since significant differences in cloud
climatology can exist over short distances.
Site Availability. W hen this document was prepared, the only sites
available from NREL were Puerto Rico, Guam, and the 50 states. For locations where
solar radiation data is not available, Data Set Pages 15 and 16 are blank. For these
locations, users may wish to contact NREL directly to obtain advice concerning data
not published in the NREL solar radiation data manual.
Suggestions for Use. The solar data presented here can be used for
calculating solar radiation cooling loads on building envelopes, and also for estimating
the value of solar illumination for daylighting calculations. Again, the user should refer
to the Solar Radiation Data Manual for Buildings for a complete description of how to
use this data.
NOTE: The data source for the NREL reports comes from the National Solar Radiation
Databasenot the data set used to calculate peak design values and other monthly
temperature and moisture data in this document. The two data sets will differ for many
reasons, including different POR, measurement locations, sampling methodology and
frequency, and differences in calculation methodology. Consequently, the user should
expect differences in degree-days, minimum and maximum temperatures, and humidity
values between this data and that calculated by the AFCCC. For design criteria, use
the temperature and moisture values presented on the Design Criteria Data section of
Data Set Page 1 (see Figure 2-1) of this document. These were calculated more
recently and used a longer POR. Also, they are taken from records at DOD locations
rather than from civilian locations nearbut not always identical tothe military data