Page 124 - ansys

(b) In the Solar Calculator dialog box, define the Global Position by the following parameters:
1. Enter a real number in degrees for Longitude. Values may range from −180 to 180 where negative
values indicate the Western hemisphere and positive values indicate the Eastern hemisphere.
2. Enter a real number for Latitude in degrees. Values can range from −90◦ (the South Pole) to 90◦
(the North Pole), with 0◦ defined as the equator.
3. Enter an integer for Time zone that is the local time zone in hours relative to Greenwich Mean
Time (+-GMT). This value can range from +12 to −12.
(c) Define the local Date and Time by the following parameters:
1. Enter an integer for Day and Month under Day of Year.
2. Enter an integer for Hour that ranges from 0 to 24 under Time of Day. Enter an integer or floating
point number for Minute.
3. The time of day is based on a 24-hour clock: 0 hours and 0 minutes corresponds to 12:00 a.m. and
23 hours 59.99 min corresponds to 11:59.99 p.m. For example, if the local time was 12:01:30 a.m.,
you would enter 0 for Hour and 1.5 for Minute. If the local time was 4:17 p.m., you would enter 16
for Hour and 17 for Minute.
(d) Define the Mesh Orientation as the vectors for North and East in the CFD mesh system of
coordinates.
(e) Select the appropriate Solar Irradiation Method. The Fair Weather Conditions is the default
method.
(f) Enter an integer for Sunshine Fraction (default = 1).

(g) Click Apply.
The solar calculator output parameters are computed and the results are re-ported in the console. The
default values are shown below:
Fair Weather Conditions:
Sun Direction Vector: X: -0.0785396, Y: 0.170758, X: 0.982178
Sunshine Fraction: 1

Direct Normal Solar Irradiation (at Earth's surface) [W/m^2]: 881.635
Diffuse Solar Irradiation - vertical surface: [W/m^2]:152.107
Diffuse Solar Irradiation - horizontal surface: [W/m^2]: 118.727
Ground Reflected Solar Irradiation - vertical surface: [W/m^2]: 96.4649
4. For transient simulations, enter the Time Steps per Solar Load Update under Update Parameters.
The number of time steps that you specify will direct the ANSYS FLUENT solver to update the solar
load data for the specified flow-time intervals in the unsteady solution process.

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