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Solar Array Wind Load

Calculates wind loads on ground-mounted photovoltaic arrays by combining AS/NZS 1170.2 dynamic pressure with SEAOC PV2-2017 net pressure coefficients. Interpolates GCrn values for tilt angle and row position to determine uplift suction, downward pressure, per-module uplift force, and horizontal drag force per metre of array width. Applicable to fixed-tilt utility and commercial solar installations in Australian wind regions.

inputs

8 fields

context

5 archetypes

engine

with-tool

outputs

5 scored fields

contract fields

Parameter Map

8 inputs to 5 scored outputs

  • design_wind_speed_m_per_s

    float

    Site design wind speed V_des,theta (after terrain, topographic, shielding, and direction multipliers)

    20 to 70m/s

  • tilt_angle_deg

    floatfrom archetypehidden in hard

    Array tilt angle from horizontal

    5 to 45degrees

  • array_height_m

    float

    Hub height of array above ground level

    0.3 to 3m

  • module_width_m

    float

    Width of a single PV module (along the slope)

    0.8 to 1.4m

  • module_length_m

    float

    Length of a single PV module (along the row)

    1.5 to 2.4m

  • num_modules_wide

    int

    Number of modules arranged in the slope direction per row

    1 to 4-

  • row_position

    enumfrom archetypehidden in hard

    Row position in the array field affecting wind exposure

    exposedinterior

  • air_density_kg_per_m3

    floatoptional

    Air density rho (standard atmosphere default 1.2)

    1 to 1.4kg/m3
dynamic_pressure_kpatol 0.03

Base velocity pressure q (kPa)

uplift_pressure_kpatol 0.03

Net uplift (suction) pressure on the array surface (kPa)

downforce_pressure_kpatol 0.03

Net downward pressure on the array surface (kPa)

uplift_force_per_module_kntol 0.03

Uplift force acting on a single PV module (kN)

drag_force_per_m_kntol 0.03

Horizontal drag force per metre of array row length (kN/m)

visibility contract

Difficulty Ladder

all_giveneasy

Low wind speed, exposed row, all parameters given — straightforward pressure and force calculation

all fields visible
all_givenmedium

Higher wind speeds and steeper tilts with all parameters given

all fields visible
partialhard

Tilt angle and row position hidden — agent must infer from site description and array configuration

tilt_angle_degrow_position

scenario bands

Archetype Atlas

utility_scale_flat

3 contexts

Utility-scale solar farm on flat open terrain with low tilt fixed-tilt racking

tilt_angle_deg10 to 20
row_positionexposed

western-nsw-solar-farm / north-queensland-solar-park / mildura-solar-precinct

utility_scale_steep

3 contexts

Utility-scale solar farm with steeper tilt for higher-latitude sites

tilt_angle_deg25 to 35
row_positionexposed

gippsland-solar-farm / tasmanian-highlands-solar / southern-sa-solar-plant

commercial_rooftop_ground

3 contexts

Commercial ground-mounted array behind a warehouse or industrial building

tilt_angle_deg10 to 25
row_positioninterior

sydney-industrial-park / melbourne-logistics-precinct / brisbane-trade-coast

remote_community

3 contexts

Remote community or mine-site solar installation on exposed terrain

tilt_angle_deg15 to 30
row_positionexposed

alice-springs-solar / mount-isa-mining-camp / pilbara-remote-solar

coastal_exposed

3 contexts

Coastal solar farm subject to high cyclonic wind speeds

tilt_angle_deg10 to 20
row_positionexposed

townsville-coastal-solar / darwin-industrial-solar / geraldton-wind-farm-solar

rendered task

Generation Preview

gippsland-solar-farm-utility-scale-steep-preview

difficulty
hard
visibility
partial
archetype
utility_scale_steep
site context
gippsland-solar-farm
instruction excerptsolar-array-wind-load_calc.py

visible fields

  • design_wind_speed_m_per_s{'min': 40, 'max': 60} m/s
  • array_height_m0.3 to 3 m
  • module_width_m0.8 to 1.4 m
  • module_length_m1.5 to 2.4 m
  • num_modules_wide1 to 4 -
  • air_density_kg_per_m31.2 kg/m3

withheld schema

row_positiontilt_angle_degdynamic_pressure_kpauplift_pressure_kpadownforce_pressure_kpauplift_force_per_module_kndrag_force_per_m_kn
Utility-scale solar farm with steeper tilt for higher-latitude sites. gippsland-solar-farm. Required outputs: dynamic_pressure_kpa, uplift_pressure_kpa, downforce_pressure_kpa, uplift_force_per_module_kn, drag_force_per_m_kn