Szerző szerinti böngészés "Kocsis, Denes"

Megjelenítve 1 - 3 (Összesen 3)
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    Evaluating battery electric vehicle usage in the EU: A comparative study based on member state energy mixes
    Kocsis, Denes; T. Kiss, Judit; Arpad, Istvan W.; Kocsis Dénes (1985-) (műszaki menedzser, környezetmérnök); Árpád István (1961-) (vegyészmérnök); T. Kiss Judit (1968-) (közgazdász); Környezetmérnöki Tanszék -- 605; Gépészmérnöki Tanszék -- 603; Műszaki Menedzsment és Vállalkozási Tanszék -- 609; MK; Debreceni Egyetem
    The transport sector is undergoing a major transformation, as battery electric vehicles (BEV) are gaining ground. Therefore, assessing the sustainability aspects of their use is crucial to obtaining a clear picture of the sector. This article aims to meet this requirement by using European Union (EU) data for the period 2011 to 2021 and focuses not only on EU-27 aggregates but also on each member state separately. For the evaluation, a well-to-wheel (WTW) method was used to calculate two parameters: energy-specific CO2 emissions (ε) and total efficiency of energy conversions, transmission, and battery (ηtotal). For these values, the annual electricity mixes of the countries were tracked in 5 + 1 categories (combined cycle gas turbine (CCGT), thermal power plant, biofuels, nuclear power plant (NPP), renewables, and imports). The calculated results were illustrated by sustainability matrices describing the former and current positions of the countries. The EU-27 aggregate achieved a 0.04 increase (from 0.37 to 0.41) in total efficiency and a 29 gCO2/MJmotion decrease (from 113 to 84 gCO2/MJmotion) during the period. This ε value for 2021 was around half the world average. However, very significant differences were identified between member states, which are also assessed in the article with special emphases on the five most populated EU countries (Germany, France, Italy, Spain, and Poland).
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    Feasibility Investigation of Hygroelectricity in the Philippines
    Tambobong, Nathan; Kocsis, Denes; DE--Műszaki Kar
    Growing global energy demand, spurred by societal and economic progress, necessitates a focus on sustainable energy solutions. Electricity consumption is rising, particularly in developing nations, demanding significant infrastructure investment. While fossil fuels dominate, environmental and security concerns are pushing a transition to renewables like solar, wind, and geothermal, while nuclear power faces safety and cost hurdles. A promising emerging field is hygroelectricity, generating power from ambient moisture using devices like HEGs and HGPGs. HGPGs function by leveraging humidity gradients to drive charged species across specialized materials, though current power output lags behind conventional batteries, and the continuous generation mechanisms are still under investigation. Research into HGPGs explores various materials and configurations, with in-thickness designs currently showing higher power density, and ongoing efforts focus on structural improvements and material enhancements to boost performance.
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    Technological Innovations in Noise Monitoring and Control
    Adutwumwaa, Josephine; Kocsis, Denes; DE--Műszaki Kar
    This study assessed the transformative role of technological innovations, particularly the use of AI to enhance environmental noise monitoring and control. The study began with a general overview of the causes, types, and health effects of noise, where emphasis was placed on the increasing threat to the urban population. Conventional methods were shown to be relatively limited by their dependence on manual processes and their insufficient spatial-temporal resolution. This brought about the ideas concerning the need for smarter and automated solutions.