PVArray

title: PVArray ---

Name Type Variability Description/Comments
mounting choice:MOUNT input time
  • mounting
  • C_MOUNTCH_BLDG: attached to bldg (rotates per [bldgAzm][bldgazm])
  • C_MOUNTCH_SITE: site base (does not rotate)
pnIdx number input time
  • Penumbra surface index
  • -1 if no Penumbra surface
area DBL input time area derived from polygon, ft2
Name Type Variability Description/Comments
fBeam number End of hour
  • fraction of area receiving direct beam
  • 1 if no Penumbra shading
fBeamErrCount number End of hour
  • counter for fBeam > 1 errors
  • limits # of runtime messages
Name Type Variability Description/Comments
vrtInp[index] number Array [37] input time input vertices (x, y, z), ft
Name Type Variability Description/Comments
elecMtri TI input time meter for system electricity production
endUse choice:ENDUSE input time end use of energy. defaults to "PV"
dcCap FLOAT_GEZ input time system capacity/size (DC nameplate), kW
moduleType choice:PVMOD input time type of module (Standard, Premium, ThinFilm)
tempCoeff number input time temperature coefficient, 1/F
covRefrInd FLOAT_GE1 input time refraction index for coating applied to cover
arrayType choice:PVARR input time type of array (Fixed, FixedRoof, 1Axis, Backtracked, 2Axis)
tilt ANGLE Start of hour Array tilt, radians (input as degrees)
azm ANGLE Start of hour Array azimuth, radians (input as degrees)
grndRefl number Start of hour ground reflectance
gcr number input time ground coverage ratio (what fraction of the ground is covered by the array). 1.0 implies no spacing.
dcacRat FLOAT_GZ input time DC to AC ratio
sif FLOAT_GE1 Start of hour Shading Impact Factor
invEff number input time inverter efficiency at rated power
sysLoss number Start of hour system losses
tCell number End of hour cell temperature, F
aoi number End of hour angle of incidence (radians)
panelTilt ANGLE End of hour tilt of pv panel (different from array tilt for tracking systems), radians
panelAzm ANGLE End of hour azimuth of pv panel (different from array tilt for tracking systems), radians
panelRot ANGLE End of hour rotation of pv panel for 1-axis tracking systems, radians clockwise from vertical
poa number End of hour plane of array incidence (before shading), Btu/h-ft2
poaBeam number End of hour plane of array beam incidence (before shading), Btu/h-ft2
radIBeam number End of hour beam radiation incident on array, Btu/h-ft2
radIBeamEff number End of hour effective beam radiation incident on array (accounts for shading impact factor), Btu/h-ft2
radI number End of hour total radiation incident on array, Btu/h-ft2
radIEff number End of hour effective total radiation incident on array (accounts for shading impact factor), Btu/h-ft2
radTrans number End of hour transmitted radiation (after accounting for shading impact), Btu/h-ft2
dcOut number End of hour DC power output, Btu
acOut number End of hour AC power output, Btu
Name Type Variability Description/Comments
tauNorm number Start of run transmittance at normal incidence
inoct TEMP Start of run installed nominal operating cell temperature, F
convRatio number Start of run ratio of back convection to front convection
tGrndRatio number Start of run ratio of ground-cell temperature diff. to air-cell temperature diff.
radILs number End of hour last step (curently hour) total radiation incident on array, Btu/h-ft2
tCellLs number End of hour last step (curently hour) cell temperature, F