| Records |
| Author |
Can Duman, A.; Güler, Ö. |
| Title |
Techno-economic analysis of off-grid photovoltaic LED road lighting systems: A case study for northern, central and southern regions of Turkey |
Type |
Journal Article |
| Year |
2019 |
Publication  |
Building and Environment |
Abbreviated Journal |
Building and Environment |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Economics; Lighting |
| Abstract |
Street lighting is one of the sectors where off-grid energy systems are used, and in the past decade interest in these systems has increased due to recent developments occurred both in LED and PV technology. This paper presents a techno-economic analysis of off-grid PV LED road lighting systems for northern, central and southern regions of Turkey. Road lighting calculations are conducted using DIALux software for M4 and M5 road lighting classes to obtain optimal LED luminaires, pole sizes, and spacings. Among the obtained LED powers, load profiles are created using real lighting hours of operation of the selected regions. And then, the required PV-battery systems are optimized using HOMER software. Finally, sensitivity analysis is performed for future projections considering possible increases in electricity prices and decreases in component cost of the PV systems. The results showed that the levelized COE of the off-grid PV LED road lighting systems vary between 0.229 and 0.362 $/kWh. for M4, and 0.254–0.359 $/kWh for M5 road lighting class, depending on the solar potential of the region. And, the total NPC of the entire lighting installation per km vary between 24296 and 29123 $ for M5, and 33225–44318 $ for M4 road lighting class. According to the results, the systems are infeasible under current conditions in Turkey. Nonetheless, they have the added benefits of contributing to the reduction of CO2 emissions. Moreover, future projections show that the systems can be feasible if the declining trend in PV system costs continues and electricity prices increase. |
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0360-1323 |
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GFZ @ kyba @ |
Serial |
2292 |
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| Author |
Markvica, K.; Richter, G.; Lenz, G. |
| Title |
Impact of urban street lighting on road users’ perception of public space and mobility behavior |
Type |
Journal Article |
| Year |
2019 |
Publication |
Building and Environment |
Abbreviated Journal |
Building and Environment |
| Volume |
154 |
Issue |
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Pages |
32-43 |
| Keywords |
Lighting; Psychology |
| Abstract |
Refitting public spaces with light-emitting diode (LED) technology in lieu of conventional luminaires bears the risk of compromising lighting quality that road users have already adapted to; this is because the LED technology has been well tested indoors, but it has not been necessarily evaluated outdoors. Further insight into the effects of street lighting on road users is necessary to resolve potential deficiencies of available technologies. This study compares the effects of three different lighting scenarios (conventional lighting, state-of-the-art LED, optimized LED) on road users via surveys (N = 598 persons) and observations (N = 1341 persons) in the city of Vienna. In terms of the uniformity of street illumination and the comfort it provides, the results show the positive effects of LED street lighting both on surveyed pedestrians and vehicle drivers. The observations of pedestrian walking behavior revealed an unexpected result—no significant differences were noted apart from a more centric walking path along the sidewalk under LED illumination, particularly with the optimized LED luminaire. |
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0360-1323 |
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GFZ @ kyba @ |
Serial |
2335 |
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| Author |
Kim, K.-N.; Jo, Y.-C.; Huang, Z.-J.; Song, H.-S.; Ryu, K.-H.; Huang, Q.-Y.; Lei, C.-L. |
| Title |
Influence of green light illumination at night on biological characteristics of the oriental armyworm, Mythimna separata (Lepidoptera: Noctuidae) |
Type |
Journal Article |
| Year |
2019 |
Publication |
Bulletin of Entomological Research |
Abbreviated Journal |
Bull Entomol Res |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Animals; Mythimna separata; biological characteristic; green light; longevity; reproduction |
| Abstract |
The oriental armyworm, Mythimna separata is an important crop pest in eastern Asia. Nocturnal insects, including nocturnal moths, have phototactic behavior to an artificial light source. Phototactic behavior in insects is species-specific in response to different wavelengths of light sources. Our previous study showed that green (520 nm) light emitting diode (LED) light resulted in a significantly higher phototactic behavior in M. separata moths compared to the other wavelength LED lights. The goal of the present study is to investigate the influence of green light illumination on biological characteristics of different developmental stages in M. separata. Our results revealed that when different developmental stages of M. separata were exposed to the green light illumination in a dark period, several biological characteristics in all developmental stages except for egg stage were positively changed, but those of F1 generation M. separata which are next generation of the adults exposed to the green light did not significantly change compared with the control level. These findings suggest that green light illumination at night (or dark period) has a positive effect on the development and longevity of M. separata. |
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Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University,Wuhan, Hubei,China |
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English |
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0007-4853 |
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PMID:31203829 |
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GFZ @ kyba @ |
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2585 |
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| Author |
Bowden, J. |
| Title |
An Analysis of Factors Affecting Catches of Insects in Light-Traps |
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Journal Article |
| Year |
1982 |
Publication |
Bulletin of Entomological Research |
Abbreviated Journal |
Bull. Entomol. Res. |
| Volume |
72 |
Issue |
4 |
Pages |
535-556 |
| Keywords |
Ecology; Animals |
| Abstract |
Analysis of published data on catches of insects in light-traps with a variety of light sources and of different designs showed that all conformed to the previously proposed model describing the functioning of a light-trap: catch = constant × where W = trap illumination and I = background illumination. Light-trap catches in differing cloud conditions and in open and woodland situations also varied as predicted by the model. A table of correction factors for different amounts of cloud cover is provided. The results are discussed in relation to use of light-traps and interpretation of light-trap data. |
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0007-4853 |
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GFZ @ kyba @ |
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2589 |
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| Author |
Garstang, R. H. |
| Title |
Predictions of Future Light Pollution for Ground-Based Observatory Sites |
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Journal Article |
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1989 |
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Bulletin of the American Astronomical Society |
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21 |
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759 |
| Keywords |
Skyglow |
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In a paper now in press (P.A.S.P. March 1989) we have given details of an improved model for calculating the light pollution caused by one or more cities at an observatory or prospective observatory site. The principal difference in the new model from our earlier one is the inclusion of the effects of the curvature of the Earth, which are significant for the large cities at large distances from mountain observatories. |
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IDA @ intern @ |
Serial |
2545 |
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