C.3 Typical values of qmst
Experience shows that good results for energy consumptions and environmental compatibility can be obtained with qinst >1 with a careful design.
Annex D
(informative]
Presentation of energy performance indicators
The two energy performance indicators - power density indicator (PDI) and annual energy consumption indicator (AECI) are compound parameters, thus they should be always presented together. All values and assumptions taken for the calculation of energy performance indicators should also be displayed clearly with the indicators. Table D.l gives an example. In some cases graphical interpretation of the operational profile can be a suitable way of presentation.
Table D.l — Example of information to be presented together with energy performance
indicators
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System power |
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Luminaire 1 |
Luminaire 2 |
Luminaire 3 |
Luminaire 4 |
Luminaire 5 |
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Operational power P (W) |
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Additional power Pad (W) |
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Illuminated area |
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Sub-area 1 |
Sub-area 2 |
Sub-area 3 |
Sub-area 4 |
Sub-area 5 |
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Area to be lit A (m2) |
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Calculated illuminance E (lx) |
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Operational profile |
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Period 1 |
Period 2 |
Period 3 |
Period 4 |
Period 5 |
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Annual operating hours (h) |
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Reduction coefficient (%) |
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Detection probability (%) |
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Energy performance indicators |
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Period 1 |
Period 2 |
Period 3 |
Period 4 |
Period 5 |
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Power density indicator Dp (W-lx ;-nr2) |
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Annual energy consumption indicator De (Wh-nr2) |
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NOTE The table can be extended by additional luminaires, sub-areas or time periods if needed.
Bibliography
CEN/TR 13201-1, Road lighting — Part 1: Guidelines on selection of lighting classes
EN 13201-4, Road lighting — Part 4: Methods of measuring lighting performance
CIE S 017/E: 2011, ILV, International Lighting Vocabulary
CIE 115:2010, Lighting of Roads for Motor and Pedestrian Traffic
CIE 144:2001, Road Surface and Road Marking Reflection Characteristics
CIE 154:2003, The Maintenance of Outdoor Lighting Systems
