Péter Németh

58708957900

Publications - 10

Multidimensional comparison of life cycle footprint of hydrogen production technologies

A. Torma A. Zseni Péter Németh

Publication Name: Cleaner Engineering and Technology

Publication Date: 2025-02-01

Volume: 24

Issue: Unknown

Page Range: Unknown

Description:

Hydrogen as an energy carrier will play an important role in the future in achieving sustainable development goals in the energy and mobility sectors as well as to reach decarbonization goals. Currently adopted hydrogen strategies foresee a significant increase in the amount of hydrogen used in the future. To meet this increased volume in the most sustainable way, a careful analysis of potential hydrogen production technologies is necessary, considering real environmental impacts. This paper provides a comprehensive overview of different non-renewable and renewable hydrogen production technologies and evaluates their environmental effects based on global warming potential (GWP). Environmental footprint data discussed in this paper are based on published life-cycle assessment (LCA) results. As direct comparison of LCA results is difficult due to different LCA scenarios, selected system boundaries, various material components and manufacturing techniques, a novel multidimensional comparison approach was developed to understand LCA results better and to give a more comprehensive picture of environmental footprint components. In addition to methodological issues, the key influencing factors of the carbon footprint of different hydrogen production technologies were also identified. It is not possible to identify one stand-alone technology that would be the most environmentally friendly in all circumstances, it is essential to investigate all the technologies in the given context of use. Regarding water-splitting, it is outstandingly crucial to examine the source of the electricity because it strongly influences the GWP of this H2 production technology. If the GWP of the electricity is high, this technology could be more harmful to the environment than the steam methane reforming (SMR).

Open Access: Yes

DOI: 10.1016/j.clet.2025.100902

Estimation of Thermodynamic and Emission Characteristics of a Sustainable Hydrogen-Gasoline Engine Through Simulation

András Lajos Nagy Péter Németh György Marton Barna Hanula

Publication Name: Lecture Notes in Networks and Systems

Publication Date: 2025-01-01

Volume: 1345 LNNS

Issue: Unknown

Page Range: 21-32

Description:

Hydrogen is expected to play a significant role in mobility and transportation as a form of energy source. To assess the effects of hydrogen as a gradual replacement fuel for internal combustion engines, a preliminary 1D thermodynamic simulation was carried out using AVL Boost for 0 vol%, 4 vol% and 8 vol% hydrogen content. Calculations were based on independently published research results, and focused on peak firing temperature (PFT), brake specific fuel consumption (BSFC), nitrous oxide emission (NOx), and carbon monoxide (CO) emission values. Results showed a decrease in BSFC of up to 3 g/kWh and ca. 5 mg/kWh decrease in CO emission with 8 vol% hydrogen, but also highlight an increase of PFT by 14 K, and ca. 0.5 g/kWh additional NOx production at high loads.

Open Access: Yes

DOI: 10.1007/978-3-031-87620-2_3

Comparison of Hydrogen Related Policies and Achievements between Latin America and Europe

A. Torma Péter Németh Susana Pérez Milicua Mendoza

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 991-996

Description:

Hydrogen, and green hydrogen will be one of the dominant energy sources of the future, the application of which will support the achievement of existing decarbonisation targets and contribute to the smooth integration of renewables into energy infrastructure based on its energy storage characteristics. The goal of this study is to compare hydrogen-related policies and achievements between Latin America and Europe. The research employs a comprehensive literature review to assess existing policy frameworks, technological advancements, and economic impacts in both regions. Preliminary findings indicate that while Europe has developed a more structured and well-funded hydrogen economy, Latin America shows great potential due to its renewable energy resources but lags in policy coordination and investment. The significance of this work lies in identifying key gaps and opportunities, aiming to provide policy recommendations that can enhance hydrogen development strategies in both regions, ultimately contributing to global decarbonization efforts.

Open Access: Yes

DOI: 10.3303/CET24114166

Catalysing responsible production: Evaluating the impact of EPR system on manufacturing enterprises

Aknur Zhidebekkyzy Anna Kotaskova Zhansaya Temerbulatova Péter Németh

Publication Name: Journal of International Studies

Publication Date: 2024-01-01

Volume: 17

Issue: 2

Page Range: 178-190

Description:

Responsible production has become increasingly vital in the global sustainability discourse, particularly in manufacturing. The extended producer responsibility (EPR) system is a critical policy mechanism that encourages manufacturers to reduce their environmental impact. Despite its growing significance, comprehensive studies assessing its effectiveness are sparse. Our research aims to address this gap by evaluating the influence of the EPR system on responsible production practices in European manufacturing enterprises. We employed the difference-in-differences (DiD) method to assess the impact, analysing panel data from 27 manufacturing enterprises across the Czech Republic, Poland, Slovakia, Romania, Estonia, Hungary, and Bulgaria, from 2010 to 2022. This method was chosen to mitigate endogeneity concerns. The results from the DiD analysis reveal a statistically significant positive impact of the EPR system on the circular material use rate, with an average increase of 10,5%. These findings indicate that the EPR system effectively enhances circular material use within the electronics manufacturing industry, a critical sector for advancing environmental sustainability.

Open Access: Yes

DOI: 10.14254/2071-8330.2024/17-2/9

The Integration of Building Information Modelling and Life Cycle Assessment: Progress, Challenges, Future Directions

Zekun Yang Bohong Wang Yee Van Fan Ting Pan Péter Németh Ling Shao Petar Sabev Varbanov

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 409-414

Description:

Building Information Modelling (BIM) plays a key role in the digitisation of the building sector, facilitating the design and construction of buildings. Environmental impacts have become an important factor to consider in building design and construction, often analysed through Life Cycle Assessment (LCA). The integration of BIM and LCA is crucial for supporting sustainable building design and construction. However, there is a lack of up-to-date reviews that consider the role of artificial intelligence (AI) in the integration of BIM and LCA. This paper addresses this gap by examining the recent progress, challenges, and future directions in building carbon emission accounting for buildings. The integration of the BIM-LCA for environmental impact accounting is explored, including goal and scope definition, life cycle inventory, impact assessment, interpretation, interoperability, and integration AI. The results identify gaps in BIM-LCA integration, including transparency issues and reliance on non-local databases. Future directions emphasise enhancing data quality, refining models, and developing AI methods for carbon emission predictions to explore decarbonisation strategy in the building sector. The review contributes to early-stage analysis, facilitating informed decision-making in sustainable building design and construction.

Open Access: Yes

DOI: 10.3303/CET24114069

Hydrogen Policy Environment in the European Union, Current Status of Policy Uptake

A. Torma Péter Németh Barna Hanula

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 499-504

Description:

Hydrogen (H2) can become a crucial technology in building an independent and resilient energy infrastructure. The production and utilisation of green hydrogen will play a crucial role in the energy environment of the European Union in the future. Several strategies were defined, and policy actions were taken. H2 has a comparably high lower heating value and no direct harmful emission during use, so it presents a viable alternative for conventional energy carriers. Independently from the final form of usage, H2 will play a key role in integrating green electricity into the grid, as according to the state-of-the-art, large-scale, long-term energy storage is only feasible in molecules containing H2. H2-based mobility solutions could offer a viable technology for sustainable transportation. This article investigates H2 production and demand in the EU, as well as the directives and incentives of the EU to accelerate H2 production and H2 technologies in general. Based on the existing policies and applications, it reviews the up-to-date status of policy uptake within the EU and gives insights into the different preparedness for the transition to a H2-based energy system of the Member States.

Open Access: Yes

DOI: 10.3303/CET23107084

Sustainability Opportunities and Barriers at Universities, Development of a Sustainable University Environment

A. Torma Eszter Lukács Bálint Filep Péter Németh

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 505-510

Description:

Nowadays, one of the most crucial environmental, social, and economic questions is how to build a sustainable future for the following generations. This is a vital challenge because we live in a historical age due to the over-utilization of CO2-intensive technologies. Thanks to this practice, greenhouse gas emission is increasing yearly; biodiversity is decreasing dramatically. It is essential for our environment that universities play a leading role in the actions that can eliminate these adverse effects. This paper introduces the status of the uptake of sustainability-related issues and targets in the Higher Education (HE) sector. It emphasizes the necessity of the comparable evaluation of these activities by introducing current sustainability ranking systems. Some barriers disable the transition to a sustainable working model for universities. The paper identifies these barriers and makes suggestions for eliminating them through the example of Széchenyi István University’s practice and sustainability action plan. The main obstacles to sustainability in the HE sector incorporate budget constraints, resistance to change, lack of planning and focus, lack of applicability, and continuity of actions. The suggested sixteen action points in this paper could support the immediate change in the attitude to sustainability-related topics at operational levels. These suggestions support the attitude formation at each level of the decision-making process.

Open Access: Yes

DOI: 10.3303/CET23107085

Smart Hybrid Energy Management System in a Passenger Car

András Lajos Nagy Péter Németh Barna Hanula

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 457-462

Description:

The technological advancements of internal combustion engines, batteries, and electric propulsion technology have reached such a level that they bring a new dimension to the potential of hybrid propulsion systems. Partially or fully electric vehicle propulsion drivetrains receive significant attention when considering the future of mobility, as they have the potential to reduce the sector's greenhouse gas emissions and dependence on fossil fuels and hopefully mitigate climate change. This paper aims to design a hybrid powertrain for a conventional passenger vehicle that can cover the performance requirements of everyday average urban usage with electric propulsion to reduce consumption and emissions and improve sustainability. It aims to present the performance requirements of the vehicle based on road measurements conducted under various traffic conditions and usage environments. The energy savings achieved through the auxiliary powertrain will also be evaluated based on real-life, everyday usage conditions. Finally, the paper introduces a Life Cycle Assessment (LCA), which compares the original conventional propulsion system with the new hybrid powertrain.

Open Access: Yes

DOI: 10.3303/CET23107077

Influence of green human resource management on employees’ behavior through mediation of environmental knowledge of managers

Udaya Raj Paudel Niranjan Devkota Agnieszka Lopatka Ujjwal Bhattarai Péter Németh

Publication Name: Journal of International Studies

Publication Date: 2023-01-01

Volume: 16

Issue: 3

Page Range: 56-77

Description:

Lately, there has been a rising awareness of the significance of becoming green and applying different environmental management strategies within the corporate community. This paper endeavours to explore the adoption of Green HRM practices by managers in Patan Industrial Estate. This study addresses the importance of knowledge development in relation to HRM practices and employee behavior. The goal is to see how Green HRM influences EGB in Patan Industrial Estate through mediation of managers' environmental knowledge. Exploratory research design was chosen as the primary study paradigm to determine the truth. The data was evaluated quantitatively by using both descriptive and inferential statistics. The associations between the 113 replies were analyzed using SEM. According to the findings of the study, environmental knowledge does not operate as a facilitator between Green HRM and EGB. This result is also theoretically significant in terms of the AMO theory. However, Green HRM is an emerging concept that deserves more attention. Employees and organizations must make even more changes to ensure that greening processes are implemented in all of their activities. General recommendations for successful implementation of Green HRM practices include revising the vision, mission and organization policies of an organization, ensuring its ISO certification, advancement of technologies, and enhancing GHRM practices by providing training and empowering employees, as well as participating in proactive government initiatives.

Open Access: Yes

DOI: 10.14254/2071-8330.2023/16-3/3

A Life Cycle Assessment Framework for Evaluating the Climate Impact of Hydrogen-Based Passenger Vehicle Technologies Toward Sustainable Mobility

Péter Németh Péter Németh Botond Mecséri Barna Hanula

Publication Name: Hydrogen Switzerland

Publication Date: 2025-09-01

Volume: 6

Issue: 3

Page Range: Unknown

Description:

Hydrogen-based mobility solutions could offer viable technology for sustainable transportation. Current research often examines single pathways, leaving broader comparisons unexplored. This comparative life cycle assessment (LCA) evaluates which vehicle type achieves the best environmental performance when using hydrogen from grey, blue, and green production pathways, the three dominant carbon-intensity variants currently deployed. This study examines seven distinct vehicle configurations that rely on hydrogen-derived energy sources across various propulsion systems: a hydrogen fuel cell electric vehicle (H2FCEV), hydrogen internal combustion engine vehicle (H2ICEV), methanol flexible fuel vehicle (MeOH FFV), ethanol flexible vehicle (EtOH FFV), Fischer-Tropsch (FT) diesel internal combustion vehicle (FTD ICEV) and renewable compressed natural gas vehicle (RNGV). Via both grey and blue hydrogen production, H2 FCEVs are the best options from the viewpoint of GWP, but surprisingly, in the green category, FT-fueled vehicles take over both first and second place, as they produce nearly half the lifetime carbon emissions of purely hydrogen-fueled vehicles. RNGV also emerges as a promising alternative, offering optimal engine properties in a system similar to H2ICEVs, enabling parallel development and technological upgrades. These findings not only highlight viable low-carbon pathways but also provide clear guidance for future targeted, detailed, applied research.

Open Access: Yes

DOI: 10.3390/hydrogen6030068