Potential Incoming Solar Radiation

O.Conrad (c) 2010
Calculation of potential incoming solar radiation (insolation).

References:


*) Most options should do well, but TAPES-G based diffuse irradiance calculation ('Atmospheric Effects' methods 2 and 3) needs further revision!

Parameters

Grid system
Grid system
Grid system
Elevation
Input Grid
Sky View Factor
Input Grid
Water Vapour Pressure [mbar]
Input Grid
Latitude [degree]
Input Grid
Longitude [degree]
Input Grid
Direct Insolation
Output Grid
Diffuse Insolation
Output Grid
Total Insolation
Output Grid
Total insolation, the sum of direct and diffuse incoming solar radiation.
Direct to Diffuse Ratio
Output Grid
Duration of Insolation
Output Grid
Sunrise
Output Grid
time of sunrise/sunset is only calculated if time span is set to single day
Sunset
Output Grid
time of sunrise/sunset is only calculated if time span is set to single day
Solar Constant [W / m²]
Floating point
Local Sky View Factor
Boolean
Use sky view factor based on local slope (after Oke 1988), if no sky viev factor grid is given.
Units
Choice
Units for output radiation values.
Available choices: kWh / m², kJ / m², J / cm²
Location
Node
Latitude
Degree
Minimum: -90.0; Maximum: 90.0
Planetary Bending
Parameters
Time
Node
Time Period
Choice
Available choices: moment, day, range of days
Moment [h]
Floating point
Maximum: 24.0
Time Span [h]
Value range
Time span used for the calculation of daily radiation sums.
Minimum: 1.39579710889e-316; Maximum: 1.395734659e-316
Time Resolution [h]: Day
Floating point
Time step size for a day's calculation given in hours.
Maximum: 24.0
Time Resolution [d]: Range of Days
Integer
Time step size for a range of days calculation given in days.
Minimum: 1.0
Update
Choice
show direct insolation for each time step.
Available choices: do not update, update, colour stretch for each time step, update, fixed colour stretch
Day of Year
Node
Day of Month
Choice
Available choices: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
Month
Choice
Available choices: January, February, March, April, May, June, July, August, September, October, November, December
Day of Year (End of Range)
Node
Day of Month
Choice
Available choices: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
Month
Choice
Available choices: January, February, March, April, May, June, July, August, September, October, November, December
Atmospheric Effects
Node
Atmospheric Effects
Choice
Available choices: Height of Atmosphere and Vapour Pressure, Air Pressure, Water and Dust Content, Lumped Atmospheric Transmittance
Height of Atmosphere and Vapour Pressure
Node
Height of Atmosphere [m]
Floating point
Water Vapour Pressure [mbar]
Floating point
This value is used as constant if no vapour pressure grid is given.
Air Pressure, Water and Dust Content
Node
Atmospheric Pressure [mbar]
Floating point
Water Content [cm]
Floating point
Water content of a vertical slice of atmosphere in cm: 1.5 to 1.7, average=1.68
Dust [ppm]
Floating point
Dust factor: 100 ppm (standard)
Lumped Atmospheric Transmittance
Node
Lumped Atmospheric Transmittance [Percent]
Floating point
The transmittance of the atmosphere, usually between 60 and 80 percent.
Maximum: 100.0