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Title:
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Energieverbruik in openbare verlichting en verkeersregelinstallaties : eindrapport verkeers-regel-installaties
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Author(s):
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Veltman, A.T.; Fernhout, J.T.
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Published by:
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Publication date:
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ECN
Environment & Energy Engineering
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1-7-2000
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ECN report number:
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Document type:
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ECN-C--00-025
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ECN publication
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Number of pages:
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Full text:
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31
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Download PDF
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Abstract:
In The Netherlands about 5,500 traffic junction light control systems arein operation, with a total number of about 600,000 incandescent lamps of on
average about 50 W power. The total energy consumption of these traffic
junction light control systems is about 87,360 MWh/year. This corresponds to
a CO2-production of about 44 kilotons yearly. Both numbers can be roughly
halved by replacement of the incandescent lamps by LED lamps. In a number of
cities already in a reasonable number of traffic junction control systems the
incandescent lamps appear to be replaced by LED lamps. The expected gain is
considered to appear mainly in the maintenance costs of the systems, due to
the longer life time of the LED lamps. lt is expected that intermediate
replacements of the lamps can be prevented, which can save a considerable
amount of money. Not withstanding the previously mentioned advantages the
savings in electricity consumption can be enormous, which due to the
relatively low energy costs does not have a large effect on the costs. The
expected pay-back period varies from about 2 1/2 year up to 11 year,
depending on the type of incandescent lamps (conventional incandescent lamp
bulb, halogen lamp or krypton lamp) which was in operation at the traffic
junction lights. Application in the current traffic junction light control
systems will almost inevitably lead to problems in the red light detection,
because the detection circuits are designed for operating on lamps with a
much higher current load. In many systems however this detection circuit has
been switched off, so in these cases LED lamps maybe could be applied with
less difficulty. In a large number of cases however the detection circuits
will have to be adapted. Application of a larger electrical (dummy) load also
would be a possibility, but then there will be almost no savings. 8 refs.
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