Atriums in the LENICALC program and LENIXML files

 The EN 15193-1 standard simplifies many things, and atriums are one of these. An atrium is usually sky lighted central area, maybe a tall lobby in a hotel...

Light is presumed to enter from the top of the atrium and then enter into windows which look into the atrium.

In the LENIXML file of a project containing an atrium it is defined as a polygon at the same level as a floor. The floor in which the atrium is drawn is considered to be the bottom of the atrium and the atrium rises up to the top of the building. So in the above example an atrium will be drawn on Floor2 and it's height (calculated by the program, not explicitly written in the XML) is the sum of the heights of Floor2 and Floor3.

Since it is part of a floor it appears in the <Floor> branch of the XML file:

<Floor floorname="FLOOR_002" hi="3.00" count="1">
    <PrintMe>false</PrintMe>
    <RoomList>
        <Room roomname="ROOM_000" type="[Educational buildings]Classroom(Fa=0.25)" mf="0.700" hta="0.800" td="1800" tn="200">
            <DcajSettings>
                <Type>Calculated</Type>
                <UserVal>0.0000000</UserVal>
            </DcajSettings>
            <Shading type="No Shading" />
            <PrintMe>false</PrintMe>
            <Polygon>
                <xy>0.0000000;0.0000000</xy>
                <xy>20.0000000;0.0000000</xy>
                <xy>20.0000000;10.0000000</xy>
                <xy>0.0000000;10.0000000</xy>
            </Polygon>
            <ZoneList />
            <WindowList />
            <RoofLightList />
        </Room>
    </RoomList>
    <AtriumList>
        <Atrium atriumname="ATRIO12" trans="1" type="atrium" k1="1" k2="1" k3="1">
            <Polygon>
                <xy>6.9221977;0.7087954</xy>
                <xy>17.0006673;0.5354024</xy>
                <xy>16.9139708;9.4868173</xy>
                <xy>7.1606131;9.4868173</xy>
            </Polygon>
        </Atrium>
    </AtriumList>
</Floor>
 

In the XML file the type of the atrium can be "atrium" or "courtyard" . The energy calculation changes between these two options. In LENICALC the atrium properties dialog looks like this:

Note how both the well index and the atrium height are calculated, not editable. 

Windows which benefit from atriums have to be connected manually, for example in LENICALC:

In the XML file a Window element (Windows belong to rooms) has an optional AtriumName element which connects the window to the atrium:

<Room roomname="ROOM_000" type="[Educational buildings]Classroom(Fa=0.25)" mf="0.700" hta="0.800" td="1800" tn="200">
    <DcajSettings>
        <Type>Calculated</Type>
        <UserVal>0.0000000</UserVal>
    </DcajSettings>
    <Shading type="No Shading" />
    <PrintMe>false</PrintMe>
    <Polygon>
        <xy>0.0000000;0.0000000</xy>
        <xy>20.0000000;0.0000000</xy>
        <xy>20.0000000;10.0000000</xy>
        <xy>0.0000000;10.0000000</xy>
    </Polygon>
    <ZoneList />
    <WindowList>
        <Window wallid="1" windowid="0" wide="1.5" high="1.5" x="4.41" y="1.0"
                         td65="0.85" k1="0.95" k2="0.80" k3="0.85" hasgdf="0" gdftau="1.0000" gdfk1="1.0" gdfk2="1.0" gdfk3="1.0">
            <ShadingIndex frontangle="0.0000" sideangle="0.0000" overhangangle="51" />
            <AtriumName>ATRIO_01_FLOOR_002</AtriumName>
            <LumList />
        </Window>
    </WindowList>
    <RoofLightList />
</Room>