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<< Click to Display Table of Contents >> Project settings |
  
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<< Click to Display Table of Contents >> Project settings |
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(Back to Project definition)
The dialog "Project - Settings" defines some additional parameters related to the project :
- Definition of the Albedo.
- Reference temperatures for the design of the PV array.
- Some options and values defined in the Hidden parameters, but specific to the project itself. These are:
| Array max. voltage: | It is a maximum admissible array voltage (Voc at minimum temperature), specîfied with the PV modules. The IEC standard requires 1000 V, the UL standard for use in the US is limited to 600 V. |
| muVoc value: | The Voc (Tmin) is normally calculated by the one-diode model. This option allows to use a derate factor muVoc specified by the manufacturer. |
| Limit overload loss for design: | the inverter sizing is based on an acceptable loss during the year, fixed at max. 3% by default. This parameter allows to increase this limit in order to define highly oversized PV array with respect to the inverter. |
Limits in the 3D construction:
Max orientation between shading planes: used for the discrimination between a single orientation or an heterogeneous field.
Heterogeneous fields: maximum angle difference for shadings: prevents the shading calculations when overcome, as the accuracy may significantly decrease due to the fact that the shading factor is computed for both arrays at the same time and applied equally to both incident irradiances.
Helios3D: Maximum plane orientation differences: following the terrain in the Helios3D constructions leads to different orientations according to the base slope of tables. This puts a limit to these distributions for defining 2 heterogeneous fields.
Maximum System / Shadings area ratio: puts a limit to the checks for compatibility between the area of modules as defined in the System part, and the areas defined in the 3D part. This limit may be increased when modules are highly spaced.
This dialog also defines the maximum search area for meteo files, in the vicinity of the project site. The default value is 10km, but it can be changed up to 9999km.
