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Prof. Dr. Martin Ivanov
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Academic Career Length
11Years (2016-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications13 August 2019 in E3S Web of Conferences
Conference Paper
MIMartin Ivanov
Martin IvanovThe presented study reveals a multi-point experimental measurement of the airflow speed, generated in the exhalation phase from the human respiratory cycle, based on data from 10 real human subjects. The results obtained demonstrate the exceptional irregularity and the transient character of the human respiratory cycle, in terms of measured speed at different points of man-generated exhalation air flow. The presented exponential trend lines show as expected, that there is a reduction in the exhalation speed, with the increase of the distance from the nose. The summary analysis shows that at 10 cm distance from the nose the maximum as well as the average measured speeds are higher than the one, measured at 5 cm distance. This suggests that due to the physiology of the human nose, 5 cm distance is not enough to characterize the fully developed exhalation jet flow. It is suggested that at this distance the exhalation jets are still two, issuing from each nostril, with different flowrate ratio. The obtained flow characteristics can be used to compare, validate and verify data from conducted numerical studies of the breathing process, via virtual models or real breathing thermal mannikins.
1 March 2017 in Energy Procedia
Journal Article
MIMartin Ivanov
Martin IvanovSMSergey Mijorski
Sergey Mijorski
Journal Article
Annually, a huge amount of waste from plant biomass and animal manure is produced from agriculture and animal farming. Many studies provide information on the biomethane potential of agricultural and livestock wastes, but only a few studies have investigated the application of the substrates in combination. The objective of the study is to enhance the fermentation process in the digester for biogas production, obtained from animal and plant waste substrates. In four batch processes for three months, the temperatures and the residence time of the substrates in the fermenter were analyzed. Simultaneously, electricity and thermal energy were produced via cogeneration units, which were exported to the public grid and city heating network. The plant substrate is a silage mixture of corn and wheat waste. The animal substrate is a mixture of beef and pig manure. Animal and vegetable waste raw materials are collected and transported to the site, located in the region of southeastern Bulgaria. The total annual consumption of animal and plant waste is 17,971 t/year. The enhancement of the process leads to the production of 1,506,000 Nm3 CH4/a of methane, the generation of which requires 299.63 MWh/a of electricity and 649.09 MWh/a thermal energy.
1 January 2023 in IOP Conference Series: Earth and Environmental Science
Conference Paper
HBH. I. Beloev
H. I. Beloev
Iliya Krastev IlievDID. I. Ilieva
D. I. Ilieva
ATA. K. Terziev
A. K. Terziev
MIMartin Ivanov
Martin IvanovThe presented paper reveals the analyses of green energy potential in university building’s roofs, assessed through the possibility of the installation of commercial photovoltaic systems. The studied roofs are part of the existing buildings of the University of Ruse “Angel Kanchev”, Bulgaria. Extensive electricity consumption and production analyses are made, based on recent accounting, measurements, and forecasted data. The estimated production of electricity from the proposed photovoltaic plant on the roofs of buildings 2, 9, 10 and UPZ of RU “Angel Kanchev”, is in the amount of 1 212 MWh/year, which constitutes 68.2% of the electricity consumed in 2019. The proposed measures will lead to the estimated 992.63 tons/year of CO2 emissions saved, and the annual CO2 emissions of RU “Angel Kanchev” will be reduced by 68.3%.
Journal Article
BSBorislav Nikolov Stankov
Borislav Nikolov Stankov
Angel K. TerzievMVMomchil Vassilev
Momchil VassilevMIMartin Ivanov
Martin IvanovThis study presents an analysis of the influence of weather conditions on the performance of a multicrystalline silicon photovoltaic module, which operates under constant resistive load and is situated near a limestone quarry. The quarry is a significant source of dust, and hence the focus of the study is on the weather factors influencing the presence of soiling on the module’s surface. The analysis encompasses a three-week period, during which the global horizontal irradiance and wind speed were recorded at 10-min intervals by an on-site weather station. The current, voltage, and back temperature of the module were also measured. Supplementary weather data were obtained from the Copernicus Atmosphere Monitoring Service and the NASA POWER databases. The primary objective is to assess whether any influence of the observed weather conditions on the presence of soiling can be inferred from the recorded data. The contribution is in part intended to test how different techniques can be used to extract useful information on the weather-related effects from somewhat limited data, assembled from various sources, while dealing with the underlying uncertainties. The analysis indicates a persistent deterioration of the module’s performance because of soiling and its subsequent improvement due to a favourable weather event.
22 January 2019 in Environmental Processes
Journal Article
MIMartin Ivanov
Martin IvanovSMSergey Mijorski
Sergey Mijorski
About Me
Dr. Martin Ivanov is an Associate Professor in Fluid Mechanics, at the Technical University of Sofia, Bulgaria, in the Faculty of Power Engineering and Power Machines. He obtained his BSc and MSc degree in Industrial Engineering at the Technical University of Sofia. Dr. Martin Ivanov received his Ph.D. in Fluid Mechanics, from the same university in 2011, under the supervision of Prof. Dr. Peter Stankov. In 2012 he was appointed to the Faculty of Power Engineering and Power Machines at the Technical University of Sofia, as an Assistant Professor. He was promoted to Senior Assistant Professor in 2013, and Associate professor in 2021. From 2022, he holds the position of Vice Dean of the Faculty of Power Engineering and Power Machines.
His expertise is in the field of fluid mechanics, computational fluid mechanics, indoor air quality, thermal comfort, building analyses, renewable energy technologies and energy efficiency.
He performed numerous specializations and scientific visits in the mentioned fields, in Denmark, France, Germany, Iceland, Romania, etc. He is a team leader of a number of national and international scientific projects/contracts, supported by Bulgarian state programs and foreign scientific programs, incl. Erasmus+. Dr. Martin Ivanov is an author of above 60 scientific publications, more than 25 of which are indexed in well-known scientific databases like Scopus and the Web of Science.