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element namegeometry
defined inhttp://solargis.info/schema/common-pv.xsd
description

Parametrization of PV system mounting type used for calculating GTI and PVOUT. If this element is missing and GTI/PVOUT is requested, flat-lying PV panels are considered (GTI=GHI). Examples:

<pv:geometry xsi:type="pv:GeometryFixedOneAngle" azimuth="180" tilt="25"/>

<pv:geometry xsi:type="pv:GeometryOneAxisHorizontalNS" rotationLimitEast="-90" rotationLimitWest="90" backTracking="true" axisDeviation="0"/>

<pv:geometry xsi:type="pv:GeometryOneAxisInclinedNS" axisTilt="30" rotationLimitEast="-90" rotationLimitWest="90" backTracking="true" axisDeviation="0"/>

<pv:geometry xsi:type="pv:GeometryOneAxisVertical" tilt="25" rotationLimitEast="-180" rotationLimitWest="180" backTracking="true"/>

<pv:geometry xsi:type="pv:GeometryTwoAxisAstronomical" rotationLimitEast="-180" rotationLimitWest="180" tiltLimitMin="10" tiltLimitMax="60" backTracking="true"/>

contentnone
@type*

required, concrete type of given geometry. Use one from GeometryFixedOneAngle, GeometryOneAxisHorizontalNS, GeometryOneAxisInclinedNS, GeometryOneAxisVertical, GeometryTwoAxisAstronomical, see table below

@azimuth

the value in degrees of a true geographical azimuth (0: north, 90: east, 180: south, 270: west, 360: north --> a compass value) . In the case of 'GeometryFixedOneAngle' the azimuth attribute is required.

In the case of two tracker types (GeometryOneAxisHorizontalNS, GeometryOneAxisInclinedNS) the value is the compass value at which the southern end of the tracker axis is oriented. Regardless of the Earth's hemisphere. With trackers, the value is limited to the range from 135 deg. to 225 deg. inclusive, so the deviation from the Northnorth-South south line is never not bigger than 45 degrees. With trackers, the attribute is optional and it defaults to 180 deg. (= which means the southern end of the axis faces to geographical South and south, so the tracker field is aligned with the Northnorth-South south line which is the optimal solution for most cases).

@tilttilt of panel surface in degrees range (0, 90), 0=horizontal, 90=vertical surface, required for 'GeometryFixedOneAngle' and 'GeometryOneAxisVertical' types
@axisTilt

optional, tilt of rotating inclined axis in degrees, 0 = horizontal, 90 = vertical axis, only applicable for 'GeometryOneAxisInclinedNS',

WARNING: if this attribute is missing, the value defaults to 30 degree.

@rotationLimitEast

optional, default is the unlimited motion in the range (-180, 180), used for all trackers. The general rule is: negative value is used for the east side, positive for the west side, the same rule applies for both Earth hemispheres). The meaning is slightly different for different types of tracker:

GeometryOneAxisHorizontalNS: rotation limits are defined as tilt of tracker table relative to its central position (which is horizontal=0 deg.), both limits are typically symmetric, e.g., rotationLimitEast=-50, rotationLimitWest=50

GeometryOneAxisInclinedNS: rotation limits are defined as tilt of tracker table relative to its central position (in this case the inclined plane defined by axisTilt attribute), both limits are typically symmetric, e.g., rotationLimitEast=-50, rotationLimitWest=50

GeometryOneAxisVertical: rotation limits are defined relative to 0 deg. (initial tracker position regardless of hemisphere), default range from -180 to 180 deg (-90 deg. east and +90 deg. west)

GeometryTwoAxisAstronomical: definition (for vertical axis) is the same as with GeometryOneAxisVertical tracker

@rotationLimitWestoptional, westward motion limit, described above
@tiltLimitMinoptional, only used with the horizontal axis of 'GeometryTwoAxisAstronomical' tracker. Limit is defined in the range of degrees (-90, +90), relative to the horizontal position of the tracking surface (0 deg.). Example: tiltLimitMin="0" tiltLimitMax="60", the tracker follows the sun elevation in the range from horizontal position to 60 degree of tilt.
@tiltLimitMaxoptional, max tilt of the tracking surface, described above
@backTrackingoptional boolean value, default is 'false' - tracker moves freely regardless of the neighbors, value is 'true' - tracker moves in the way it avoids shading from neighboring tracker constructions.

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