Search Results - "Topalis, F.V"

Harvesting daylight with LED or T5 fluorescent lamps? The role of dimming by Doulos, L.T., Tsangrassoulis, A., Kontaxis, P.A., Kontadakis, A., Topalis, F.V.

“…[Display omitted] •Best-fit functions between consumed power and light output are introduced for luminaires with T5 lamps and for LED with dimmable drivers.•A…”
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Multi-criteria decision analysis to select the optimum position and proper field of view of a photosensor by Doulos, L., Tsangrassoulis, A., Topalis, F.V.

“…•A new methodology for the determination of proper FOV and position of a photosensor is proposed.•Model takes into account illuminance ratio, energy savings…”
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Artificial Optical Radiation photobiological hazards in arc welding by Gourzoulidis, G.A, Achtipis, A, Topalis, F.V, Kazasidis, M.E, Pantelis, D, Markoulis, A, Kappas, C, Bourousis, C.A

“…Highlights • Arc metal welding, a widespread occupational and domestic activity, emits hazardous optical radiation. • Dir 2006/25/EC sets limits (ELVs); we…”
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Influence of ground and corona currents on dielectric behavior of small air gaps by Maglaras, A., Topalis, F.V.

“…This paper investigates the influence of grounding on the field distribution and on the dielectric behavior of small rod-plate and rod-rod air gaps. This…”
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Influence of large-scale installation of energy saving lamps on the line Voltage distortion of a weak network supplied by photovoltaic station by Korovesis, P.N., Vokas, G.A., Gonos, I.F., Topalis, F.V.

“…The aim of this research is to calculate and analyze the harmonic distortion extent caused in weak low-voltage networks due to a possible large-scale…”
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Photobiological hazards in shielded metal arc welding by Gourzoulidis, G.A., Bouroussis, C.A., Achtipis, A., Kazasidis, M., Pantelis, D., Markoulis, A., Konstantakopoulos, I., Topalis, F.V.

“…•SMAW is a widespread occupational and domestic arc welding technique.•Almost the entire optical spectrum (170–320, 400–510, 690–1800) nm was assessed.•Sub…”
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The role of spectral response of photosensors in daylight responsive systems by Doulos, L., Tsangrassoulis, A., Topalis, F.V.

“…Lighting control technologies using photosensors have a great potential for energy savings in areas with high levels of daylight. Although the proper…”
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Evaluation of heat transfer coefficient of tungsten filaments at low pressures and high temperatures by Chondrakis, N.G., Topalis, F.V.

“…The paper presents an experimental method for the evaluation of the heat transfer coefficient of tungsten filaments at low pressures and high temperatures. For…”
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Starting characteristics of fluorescent tubes and compact fluorescent lamps operating with electronic ballasts by Chondrakis, N.G., Topalis, F.V.

“…The paper presents the results from an experimental investigation of the starting parameters of fluorescent lamps operating with electronic ballasts. Two types…”
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Influence of cold starting on the life of T5 fluorescent tubes and CFLs by Chondrakis, N.G., Topalis, F.V.

“…The paper presents an experimental investigation of the parameters that influence the life of T5 and compact fluorescent lamps (CFLs) operating with instant…”
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Probability of backflashover in transmission lines due to lightning strokes using Monte-Carlo simulation by Gonos, I.F., Ekonomou, L., Topalis, F.V., Stathopulos, I.A.

“…A method, which estimates the lightning performance of high voltage transmission lines based on the Monte-Carlo simulation technique, is described in this…”
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Arbitrary waveform generator for harmonic distortion tests on compact fluorescent lamps by Topalis, F.V., Gonos, I.F., Vokas, G.A.

“…This paper presents an experimental method to perform tests on compact fluorescent lamps operated with distorted voltage waveform conditions. The voltages used…”
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Efficiency of energy saving lamps and harmonic distortion in distribution systems by Topalis, F.V.

“…The aim of this paper is the investigation of the electric and photometric characteristics of energy efficient lamps. These lamps consume less active power and…”
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Mobile Energy Disseminators increase electrical vehicles range in a smart city by Maglaras, L.A, Jianmin Jiang, Maglaras, A.L, Topalis, F.V

“…Dynamic wireless charging of electric vehicles is becoming a preferred method since it enables power exchange between the vehicle and the grid while the…”
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Emission of electromagnetic radiation and ionisation phenomena in inhomogeneous fields in air under lightning impulse voltages by Kanellias, A.A, Gonos, I.F, Topalis, F.V, Bourkas, P.D, Stathopulos, I.A

“…This Letter deals with the ionisation phenomena in non-uniform medium air gaps stressed by lightning impulse voltages. The application of the Townsend theory…”
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Energy efficiency of distribution transformers in Europe by Targosz, R., Topalis, F.V.

“…Losses in distribution transformers account for almost one third of overall transmission and distribution losses. Previous European Copper Institute studies…”
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Electric Network Power Quality assessment using Fuzzy Expert System Methodology by Vokas, G.A, Kaminaris, S.D, Kontaxis, P.A, Rangoussi, M, Ioannidis, G.C, Papathanassiou, S.A, Malatestas, P.V, Topalis, F.V

“…The aim of this paper is to present a Fuzzy Expert System Methodology (FESM), based on the Fuzzy Logic, Expert System techniques and multicriteria decision…”
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South-East European Transmission Systems Operators' Challenges (SEETSOC) by Liatsis, P, Topalis, F.V, Harkiolakis, N, Ekonomou, L

“…This paper presents a recently launched EU FP7 Cooperation project that addresses the needs of South-East European Transmission Systems Operators (TSOs) in…”
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Single-phase virtual power and energy analyzer in compliance with IEEE Std 1459-2000 for harmonic measurements on discharge lamps by Orfanos, C.N., Topalis, F.V.

“…This paper presents a single phase power-energy analyser with the required specifications for the investigation of the electrical performance of non-linear…”
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Harmonic distortion in electric power systems introduced by compact fluorescent lamps by Gonos, I.F., Kostic, M.B., Topalis, F.V.

“…The purpose of this paper is the investigation of the harmonic distortion introduced by the compact fluorescent lamps to the distribution systems. The results…”
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