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Click here to read more about PV panels in building simulation calculations.

Dimensions

  • Gebouwsimulatie

Length

  • Gebouwsimulatie

The length of the solar panel in millimeters.

Width

  • Gebouwsimulatie

The width of the solar panel in millimeters.

Solar cells

  • Gebouwsimulatie

Peakpower

  • Gebouwsimulatie

The peak wattage per panel, determined under standard test conditions, can be filled in here. This peak wattage is used to simulate power generation.

Installation

  • Gebouwsimulatie

The type of installation of the solar panels can be specified if the yield factor is unknown. The yield factors used in the calculations for the different installation methods are given in Table 20.1 BS 7120.

  • Unventilated (directly installed on roof or façade, i.e. without cavity)
  • Moderately ventilated (installed on / inside the roof or façade)
  • Highly ventilated (installed detached on an open supporting structure)

Dimensions

  • EPG

Surface

  • EPG

This is the surface area of the PV-panel / solar collector excluding the support structure.

Orientation

  • EPG

The orientation of the PV-panel / solar collector is specified with respect to the north direction. The north direction corresponds to an orientation of 0 º and the south direction to an orientation of 180 º. A PV-panel/solar collector which has been oriented towards the south will give the most favourable yield. The orientation and the angle of inclination of a PV-panel / solar collector determine the amount of incident solar radiation as presented in BS 7120, Chapter 21, for different orientations and inclinations.

Publication

NEN 7120 H21.2

Numerical values of climate data

 

Angle of inclination

  • EPG

This parameter represents the angle of inclination of the PV-panel / solar collector. A horizontal surface has an angle of inclination of 0 º, and a vertical surface has an inclination of 90 º. The most favourable angle of inclination is around 35 or 36 º. The angle of inclination and the orientation of a PV-panel / solar collector determine the amount of incident solar radiation as presented in BS 7120, Chapter 21, for different orientations and inclinations.

To compute the shading reduction factor a minimal obstruction is assumed by default. This cannot be modified at the time.
Publication

NEN 7120 H21.3

Shading reduction factors

 

Solar cells

Peak power PV-panels known

  • EPG

In this box it can be indicated whether the peak power of the PV-panels is known. After clicking the checkbox an additional input field appears in which the peak power can be specified. Note that if the peak power is specified a quality statement should be presented.

Total peak power

  • EPG

If the total peak power of the PV-panels is known it can be specified here in W/m2 as indicated in the quality statement.

Type of PV-panel

  • EPG

The type of solar cell can be indicated here if the peak power of the solar cells is not known. For the various types, the peak powers are provided in Table 20.2 of NEN 7120, which are used for calculations.

Publication

NEN 7120 H20.3.2

Calculation rules

 

Different yield factor

  • EPG

Depending on the integration of the PV-panels into the building a yield factor is determined. In order to deviate from this value a different yield factor may be specified here. In this case, a quality statement should be presented.

Yield factor

  • EPG

The yield factor of the PV-panels can be specified here as shown in the quality statement.

Installation

  • EPG

The type of installation of the solar panels can be specified if the yield factor is unknown. The yield factors used in the calculations for the different installation methods are given in Table 20.1 BS 7120.

  • Unventilated (directly installed on roof or façade, i.e. without cavity)
  • Moderately ventilated (installed on / inside the roof or façade)
  • Highly ventilated (installed detached on an open supporting structure)
Publication

NEN 7120 H20.3.2

Calculation rules

 

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