The following variables are calculated during the simulation process, and available as results:
Meteorological data:
| GlobHor | Horizontal global irradiation, as read on the meteo file. |
| DiffHor | Horizontal diffuse irradiation, read on the meteo file |
| BeamHor | Horizontal beam irradiation, = GlobHor-DiffHor. |
| Tamb | Ambient temperature, read on meteo file, |
| Windvel | Wind speed read on meteo file |
| If not present on file : monthly value, or default value (3 m/s). |
Incident energy in the collector plane (result of the transposition)
| GlobInc | Incident global irradiation in the collector plane |
| BeamInc | Incident beam irradiation in the collector plane |
| DiffAInc | Incident diffuse irradiation in the collector plane |
| (usual "diffuse" acception including albedo) |
| DiffSInc | Incident diffuse irradiation (from sky) in the collector plane |
| AlbInc | Incident albedo irradiation in the collector plane |
| Bm/Gl | Incident Beam/Global ratio = BeamInc / GlobInc |
| Diff/Gl | Incident Diffuse/Global ratio = DiffInc / GlobInc |
| DifS/Gl | Incident Sky diffuse/Global ratio = DifSInc / GlobInc |
| Alb/Gl | Incident Albedo/Global ratio = AlbInc / GlobInc |
Incident energy on collectors, corrected for optical losses
| GlobHrz | Global on collectors, corrected for horizon (far shadings) |
| GlobShd | Global on collectors, corrected for horizon and near shadings |
| GlobIAM | Global on collectors, corrected for horizon, near shadings and IAM |
| GlobSlg | Global on collectors, corrected for horizon, near shadings, IAM and soiling |
| GlobEff | "Effective" global, after all optical losses (shadings, IAM, soiling) |
| DiffEff | "Effective" diffuse, corrected for all optical losses |
| "Effective" = irradiation effectively reaching the PV-cell surface. |
Secondary optical factors (the factors for Diffuse and Albedo are constant)
| FTransp | Transposition factor = GlobInc / GlobHor |
| FHrzBm | Horizon shading factor on beam = BeamHrz / BeamInc |
| FHrzGl | Horizon shading factor on global = GlobHrz / GlobInc |
| FShdBm | Near shading factor on beam = BeamShd / BeamHrz |
| FShdGl | Near shadings factor on global = GlobShd / GlobHrz |
| FIAMBm | IAM factor on beam component = BeamIAM / BeamShd |
| FIAMGl | IAM factor on global component = GlobIAM / GlobShd |
| FSlgBm | Soiling loss factor on beam = BeamSlg / BeamIAM |
| FSlgGl | Soiling loss factor on global = GlobSlg / GlobIAM |
Specific variables for bi-facial systems simulation
| GlobGnd | Global incident on ground, below the system. |
| ReflLss | Ground reflection loss (albedo) |
| BkVFLss | Loss due to the view Factor for rear side |
| BackShd | Shading loss on the rear side (mechanical structures between ground and rear side) |
| DifSBak | Sky diffuse directly reaching the rear side |
| BmIncBk | Beam incident on the rear side (morning/evening in Summer) |
| BmSFBak | Beam shading factor on the rear side |
| BeamBak | Bean effective (after shadings) on the rear side |
| GlobBak | Global irradiance on the rear side |
| ReflFrt | Ground reflection on the Front side (added to GlobEff) |
PV array virtual productions for loss evaluations
| EArrRef | Array Reference Energy for the PR evaluation. |
| Virtual energy produced according to the manufacturer specification Pnom (nameplate) |
| The reference installed power is equal to PNom (nameplate) * Number of PV modules. |
| Equivalent to the Yr normalised value. Not shown on the report. |
| EArrNom | Array Nominal energy at STC, starting point for the loss diagram |
| Virtual energy produced at TRef (STC: 25°C) according to the PV model |
| This may differs from the preceding as it is based on the model's Pmpp result instead of PNom, which may be slightly different. |
PV array losses and MPP running
| GIncLss | PV loss due to irradiance level |
| This is the effect of the low-light efficiency of the PV module (efficiency with respect to effic. at 1000 W/m2) |
| TempLss | PV loss due to array temperature |
| Difference E(GlobEff, TMod) with respect to model calculated at Tmodule = 25°C |
| SpctCor | Spectral correction (for amorphous or CdTe modules) |
| Calculated from the Spectral correction model amorphous) or the specific model from FirstSolar for CdTe. |
| ModQual | Module Quality loss |
| fixed constant parameter, |
| MisLoss | Module mismatch loss |
| fixed constant parameter for MPP or fixed V operation, depending on system, |
| calculated at each hour with the real array current |
| EArrMPP | Array virtual energy at MPP (after wiring and mismatch losses), |
| Virtual calculation independent of the system running (inverter, regulator) |
| Tarray | Average module temperature during operation |
| DTArr | Temperature difference between modules and ambient' |
| DTArrGl | DTArr weighted by "effective" global' irradiation |
| TExtON | Average ambient temperature during system operation. |
Further simulation variables are system-dependent:
