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A Novel Approach to Astronomical Time Relays in Point of Energy Saving in Street Lighting of the Big Cities: the Selected Plot Area Denizli in Turkey

Sinan Kivrak(1), Mustafa Gündüzalp(2), Selami Kesler(3*), Mehmet Beklergül(4)

(1) Department of Electrical and Electronics Engineering, Pamukkale University, Turkey
(2) Department of Electrical and Electronics Engineering, Dokuz Eylul University, Turkey
(3) Department of Electronics and Computer Science, Pamukkale University, Turkey
(4) Electrical Program of Ege Community College, Ege University, Turkey
(*) Corresponding author



Nowadays, obtaining and gaining the control of energy sources are difficult and costly. Besides, most of the wars are due to energy aspects. Therefore, energy saving has now become very important for all countries in the world. Furthermore, the energy management and saving matters are adopted as fundamental policies by the governments as well. Some projects based on energy efficiency are even supported by the nonprofit foundations. Additionally, countries are exploring new energy sources and finding new techniques in using energy thrifty. The streetlights or outdoor lighting items are used up a plenty of energy in vain in some part of the day such as twilight duration because of using conventional photocell relays.  Changing in the sunrise and the sunset times during the year, profiting duration from the daylight is different for each day. As the photocell relays have different inner impedance versus daylight, and the weather may be cloudy or clear, they can be turned-on early and can be turned-off lately. Besides, these relays are not so sensitive to twilight. Therefore, the amount of energy wasted during the year is going to be considerable. The duration of the consumption in vain is one hour per day at least. However, in case of using astronomical time relays, since the sunrise and the sunset times related to different time zone can be calculated during the year, all of the streetlights can be controlled by different offset time and can be saved respectable amount of energy per year. In this study, the importance of using the astronomical relays for outdoor lighting for energy saving and efficiency is discussed. The operating principal of these relays is analyzed by purposed method and compared with that of NOAA. An implementation of an astronomical time relay for Denizli City in Turkey is selected as a case study. It was proved that the energy consumption in vain one hour per day during the year is remarkable amount in the selected plot application area.
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Astronomical Time Relays; Outdoor Lighting; Twilight Zone; Energy Saving and Efficiency

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L. A. Greening, D. L. Greene, C. Difiglo, Energy efficiency and consumption – the rebound effect – a survey, Energy Policy, 2000, vol. 28, pp.389-401.

H. Herring, Does Energy efficiency save energy? The debate and its consequences, Applied Energy, 1999, vol. 63, pp.209-226.

S. T. Anderson, R. G. Newell, Information programs for technology adoption: the case of energy-efficiency audits, Resource and Energy Economics, 2004, vol. 26, pp.27-50.

Z. Li, Y. Ruan, A Novel Energy Saving Control System for Elevator Based on Supercapacitor Bank Using Fuzzy Logic, International Conference on Electrical Machines and Systems, 17-20 Oct. 2008, ICEMS 2008., pp. 2717-2722.

H. Auinger, Efficiency of electric motors under practical conditions, Power Engineering Journal, June 2001, pp.163-164.

A. J. J. Rezek, C. A. D Coelho, J. A. Cortez, J. M. E. Vicente, J. P. G. Abreu, D. Ramos, C. Magalhaes, V. F. Silva, Ninth International Conference on Harmonics and Quality of Power, Energy conservation with use of “soft starter”, 2000, vol.1, pp, 354-359.

J. H. Santoyo, A. S. Cifuentes, Trigeneration: an alternative for energy savings, Applied Energy, 2003, vol. 76, pp. 219-227.

T. Kato, S. Banno, N. Hayakawa, Y. Suzuoki, Y. Kaya, Energy Saving Potential of Cogeneration System in Commercial And Residential Sectors in Japan, 1998 International Conference on Energy Management and Power Delivery 3-5 Mar. 1998, vol. 1, pp. 235-240.

S. Bhattacharjee, N. Vasudean, Energy efficiency considerations in the Indian foundry industry, Energy Conversion Engineering Conference, 11-16Aug 1996, vol. 4, pp. 2263-2268.

K. Kaygusuz, Energy Situation, Future Developments, Energy Saving, and Energy Efficiency in Turkey, Energy Source, 1999, vol. 21, pp.405-416.

M. Gilbert, Renewable and Efficient Electric Power Systems, 2004, pp. 392-419. Hoboken NJ, USA: John Willey & Sons Incorporated.

A. Luque, S. Hegedus, Handbook of Photovoltaic Science and Engineering. John Wiley & Sons, 2003.

S. Kıvrak, Comprehensive Desing For Controlling And Modelling Of An Off-Grid Pv System At Maximum Power Output. 2008. Doktora Tez Çalişmasi. Dokuz Eylül Fen Bilimleri Enstitüsü.

T. Markvart, C. Luis, 2003. Practical Handbook of Photovoltaics: Fundamentals and Applications, ElsevierAdvanced Technology, The Boulevard. Langford Lane, Kidlington Oxford OX5 lGB, UK. AAD Astronomical Applications Dept. Rise and Set for the Sun for 2009 U. S. Naval Observatory Washington, DC20392-5420


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