INVESTIGATION OF THE CIRCADIAN EFFICIENCY OF LIGHTING IN AN EDUCATIONAL LABORATORY

Iva Petrinska, Dilyan Ivanov
Technical University of Sofia, Sofia, Bulgaria

SOME NEW ASPECTS IN THE LIGHTNING PROTECTION OF PHOTOVOLTAIC ELECTRICAL POWER PLANTS
Georgi Velev, Krasimir Ivanov, Petar Petrov
Technical University of Gabrovo, Gabrovo, Bulgaria

PHOTOBIOLOGICAL IMPACT OF LED LIGHTING ON HUMANS
Veselina Stefanova
Technical University of Gabrovo, Gabrovo, Bulgaria

ANALYSIS OF ELECTRICAL QUANTITIES DURING OPERATION OF INDUCTION MOTORS WITH FREQUENCY CONTROL
Lyubomir Dimitrov
Technical University of Gabrovo, Gabrovo, Bulgaria

STUDY OF THE PHOTOMETRIC AND COLORIMETRIC CHARACTERISTICS OF LED FLOODLIGHTS DURING THE WARM-UP PROCESS
Plamen Tsankov, Milko Yovchev, Hristo Ibrishimov, Ivaylo Stoyanov
Technical University of Gabrovo, Gabrovo, Bulgaria

STUDYING THE INFLUENCE OF CLIMATIC FACTORS ON THE CAPACITY UTILIZATION FACTOR OF A PHOTOVOLTAIC SYSTEM WITH CIGS MODULES
Ivaylo Lazarov
Technical University of Gabrovo, Gabrovo, Bulgaria

ENERGY EFFICIENCY OF MINING PUMP UNITS
Dimitrina Koeva, Valentin Georgiev
Technical University of Gabrovo, Gabrovo, Bulgaria

ELECTRICITY EFFICIENCY OF FLOTATION FACILITIES
Nikolay Lakov
University of Mining and Geology “St. Ivan Rilski”, Sofia, Bulgaria

TRENDS AND FORECASTS FOR BULGARIA'S ENERGY TRANSITION BALANCING MARKET
Dimitrina Koeva¹, Ralena Kutkarska^2
1Technical University of Gabrovo, Gabrovo, Bulgaria
²Municipality of Sliven, Sliven, Bulgaria