Ecologia Balkanica

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https://doi.uni-plovdiv.bg/handle/store/4
p-ISSN: 1314-0213 / e-ISSN: 1313-9940

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Browsing Ecologia Balkanica by Author "Asenov, Stanislav"

Now showing 1 - 5 of 5
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    Ecological effects of changes in the ignition angle of a gasoline engine on exhaust harmful gases emissions
    (Plovdiv University Press "Paisii Hilendarski", 2025-05-28) Kanevski, Hristo; Lyubomirov, Slavi; Asenov, Stanislav; Shehova, Daniela
    The present study reports the results from a real experiments of the impact of the ignition angle on the harmful exhaust gases emitted by a gasoline engine. The experiments were carried out with a BMW 318 gasoline engine equipped with a MegaSquirt 3 electronic control unit and TunerStudio MS software, as well as a Kane AUTOplus gas analyzer. The main emissions considered in the study include some greenhouse gases such as carbon monoxide (CO), carbon dioxide (CO2) and unburned hydrocarbons (HC). The emissions of harmful gases were measured at 7 different engine speeds and 9 different ignition angles. The obtained data were used to compile regression equations that describe the relationship between the ignition angle, engine speed and the harmful emissions levels. The obtained results and derived equations offer specific recommendations for optimization of the ignition angle to minimize harmful emissions and improve the environmental performance of gasoline engines.
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    Photovoltaic power plants on agricultural land – are they really green?
    (Plovdiv University Press "Paisii Hilendarski", 2025-01-22) Klimentova-Nikolova, Yanina; Petrova, Slaveya; Nikolov, Bogdan; Popov, Rumen; Lyubomirov, Slavi; Asenov, Stanislav; Kanevski, Hristo; Dakova, Megi; Angelov, Nikola; Kazandzhieva, Svetlozara; Yordanov, Emil
    Photovoltaic systems are a rapidly developing technology that plays a crucial role in the transition to clean energy and the reduction of greenhouse gas emissions. However, it is important to consider their potential impacts on the environment and biodiversity, especially when installing them on agricultural land. The aim of this study is to analyze and assess the impact of photovoltaic power plants (PPPs) on soil properties, microclimate and biodiversity. Renewable energy infrastructure can impact biodiversity in different ways during its construction, operation and maintenance, as well as during decommissioning or recommissioning. Potential impacts of PPPs on biodiversity include direct morbidity and mortality of wildlife species, habitat loss and degradation, habitat fragmen-tation and barrier effects, habitat alteration or creation, behavioral changes, physiological changes and displacement, infrared wave impacts, impacts on ecosystem services, indirect impacts, and cumulative impacts at the population level. Constructions with photovoltaic panels can affect soil and microclimate conditions by trapping precipitation and atmospheric deposition, changing surface albedo, increasing ground shading, and influencing wind speed. Significant changes in these parameters have been found in all studied locations, which can lead to changes in species composition, richness and diversity. The results obtained for the main negative impacts of PPPs on agricultural lands on the environment can be used to solve a wide range of management tasks such as control over investment proposals in the field of photovoltaics, etc.
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    Sensor system for in-situ monitoring the surface waters quality of the Veleka River, Strandzha Nature Park (Bulgaria)
    (Plovdiv University Press "Paisii Hilendarski", 2024-06-19) Popov, Rumen; Lyubomirov, Slavi; Stoyanova, Stela; Petrova, Slaveya; Nikolov, Bogdan; Yancheva, Vesela; Georgieva, Elenka; Shotarova, Snezha; Asenov, Stanislav; Tokmakov, Dimitar
    Monitoring the environmental status along the Veleka River (Strandzha Mtn, Bulgaria) is an essential measure for avoiding the dangers of ecological catastrophes and for preserving the unique biological diversity in this region. A system for monitoring some of the main parameters of surface waters, soils and air, as well as the sunlight levels, has been designed and initially tested. For this purpose, an automatic, remote measuring station was developed, intended for installation on the shore, near the riverbed. It has been designed not only for collecting and archiving information about the physico-chemical status of the river, but also periodically sends the data to a communication server. The developed system of several automatic measuring stations will enable us not only to analyze the current status, but also to generate an early warning in case of danger health ecosystem decline.
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    Some aspects of the impact of photovoltaic plants on the environment
    (Plovdiv University Press "Paisii Hilendarski", 2025-05-23) Petrova, Slaveya; Nikolov, Bogdan; Popov, Rumen; Lyubomirov, Slavi; Asenov, Stanislav; Kanevski, Hristo; Dakova, Megi; Yordanov, Emil; Kazandzhieva, Svetlozara; Klimentova-Nikolova, Yanina
    Renewable energy sources (RES) play a key role in the global effort to tackle climate change and ensure a sustainable energy future. They are energy sources that are naturally renewable and have a minimal or zero carbon footprint. The main types of renewable energy sources include wind, solar (thermal and photovoltaic), aerothermal, geothermal, hydrothermal, ambient energy, tidal, wave and other ocean energy, hydroelectric power, biomass, landfill gas, sewage treatment plant gas and biogases (EC Directive 2018/2001). Large-scale photovoltaic power plants (PPPs) are being developed at a rapid pace and are set to use thousands or millions of acres of land worldwide. While the energy, economic and environmental impacts of PPPs are generally considered positive, large-scale deployment has negative impacts on non-urban areas. Specific impacts on soils and rural areas (e.g. permanent or temporary soil sealing conditions, complete or partial soil shading, land degradation, habitat fragmentation and loss of traditional agricultural practices) have been identified and require further investigation. The life cycle analysis of PPPs showed that they cannot be accepted as green technologies with zero emissions due to the potential negative effects on the environment. However, they are one of the most promising renewable energy sources, which emphasizes the need to search for sustainable models for their production, construction and operation.
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    Sustainable development of rural areas in protected territory – a case study from Strandzha, Bulgaria
    (Plovdiv University Press "Paisii Hilendarski", 2024-03-05) Petrova, Slaveya; Nikolov, Bogdan; Tokmakov, Dimitar; Lyubomirov, Slavi; Popov, Rumen; Asenov, Stanislav; Velcheva, Iliana; Yancheva, Vesela; Georgieva, Elenka; Stoyanova, Stela
    Sustainable development is based on three pillars: sustainable economic growth, social well-being and environment protection. Sustainable rural development is regarded as a multidimensional concept including an equitable and balanced development within a rural area, an increased level of social cohesion and equitability, as well as the assuming of responsibility for using natural resources and revealing at environmental protection. The studied region is located into the Strandzha Mtn - the only Bulgarian territory included in the five priority territories for conservation in Central and Eastern Europe. We have identified some core problems that should be addressed aiming to achieve the sustainable development of this area. Some of them are as follows: the absence of developing projects and focus on the development of individual villages, the lack of willingness of local people to cooperate , local resources are not effectively used and the local community is not adequately involved.