1. Maximum take-off mass estimation of a 19-seat fuel cell aircraft consuming liquid hydrogenMaršenka Marksel, Anita Prapotnik Brdnik, 2022, izvirni znanstveni članek Opis: In this paper, the maximum take-off mass (MTOM) of a 19-seat fuel cell aircraft with similar
characteristics to a conventional 19-seat aircraft is estimated using the combination of a rapid method
and semi-empirical equations. The study shows that the MTOM of a 19-seat fuel cell aircraft with
current technology would be 25% greater than that of a conventional aircraft. However, with the
expected technological improvements, the MTOM of a 19-seat fuel cell aircraft could reach lower
values than that of a conventional aircraft. The most important parameter affecting the MTOM of
fuel cell aircraft is the power-to-weight ratio of the fuel cells. If this ratio of fuel cell aircraft does
not improve significantly in the future, fuel cell aircraft with lower power loading will become the
preferred choice; thus, certain trade-offs in flight performance, such as a longer takeoff distance, will
be accepted. The study provides the basis for further economic analysis of fuel cell aircraft, which
has yet to be conducted.
Ključne besede: fuel cell aircraf, general aviation, turboprop aircraft, all-electric aircraft
Objavljeno v DKUM: 13.03.2025; Ogledov: 0; Prenosov: 3
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2. Comparative analysis of direct operating costs: Conventional vs. hydrogen fuel cell 19-seat aircraftMaršenka Marksel, Anita Prapotnik Brdnik, 2023, izvirni znanstveni članek Opis: In this paper, a comparative analysis of direct operating costs between a 19-seat conventional and hydrogen-powered fuel cell aircraft is performed by developing a model to estimate direct operating costs and considering the evolution of costs over time from 2030 to 2050. However, due to the technology being in its early stages of development and implementation, there are still considerable uncertainties surrounding the direct operating costs of hydrogen aircraft. To address this, the study considers high and low kerosene growth rates and optimistic and pessimistic development scenarios for hydrogen fuel cell aircraft, while also considering the evolution of costs over time. The comparative analysis uses real flight and aircraft data for the airliner Trade Air. The results show that the use of 19-seat hydrogen fuel cell aircraft for air transportation is a viable option when compared to conventional aircraft. Additionally, the study suggests potential policies and other measures that could accelerate the adoption of hydrogen fuel cell technology by considering their direct operating costs.
Ključne besede: fuel cell aircrafts, direct operating cost of aircraft, 19-seat aircraft
Objavljeno v DKUM: 15.04.2024; Ogledov: 172; Prenosov: 35
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3. Impacts of zero-emission powertrains based on hydrogen technologies in public transportNiko Natek, Boštjan Krajnc, 2020, izvirni znanstveni članek Opis: This article reviews the development potentials and environmental impact of introducing category M3 vehicles (for passenger transport/buses) with fuel cell electric powertrains to an urban and inter-urban public transport service (PTS) to be operated in the Savinjsko-Šaleška region. The main focus is the demonstration of the PTS modelling and preliminary environmental impact assessment of the operation compared to conventional (modern) diesel-powered internal combustion engines.
Ključne besede: Hydrogen, Fuel Cell, Transport, Energy efficiency, Green-house gas emissions, Energy transition, Environment, Public transport service, Internal combustion Engine, CO2
Objavljeno v DKUM: 15.11.2023; Ogledov: 415; Prenosov: 31
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5. Design of wFoil 18 Albatross with hydrogen technologiesNejc Zore, Jurij Avsec, Urška Novosel, 2023, strokovni članek Opis: This article discusses the design of fuel cell propulsion for 18 albatross foil vessels. The purpose of this article determined the economic viability of such propulsion. WFoil 18 Albatross was chosen for a high-speed, low-power propulsion system. The hydrogen propulsion system for the Albatross vessel consists of the following parts:
- Electric motor (Emrax 188) to convert electricity into mechanical energy;
- Battery (LG RESU 3.2EX | LG Battery System), which provides electricity in case of emergency or adds the necessary energy to run the engine at maximum power;
- Controller (EmDrive 500), which provides enough energy to pass between the elements of the propulsion system;
- Fuel cell (Hydrogenics HYPM-HD 30 POWER MODULE), which is the primary source of energy;
- The tank (tank for hydrogen gas type 3) stores fuel, which in our case is hydrogen.
The brackets indicate the parts that have been selected for the hydrogen propulsion system. The approximate weight of all these parts is about 249.1 kg and the price of all these parts is about 55254 €. All prices are from 2020 and are subject to change. The main idea in the construction of this charging station is the use of seawater and solar energy or renewable energy sources for hydrogen production. The components of the charging station are Solar cells (LG NeON 2), Desalination (CRYSTAL EX PURE), Electrolysis (Nel C Series C10), and Charging station (Haskel (Version with air compressor)). The brackets indicate the parts that have been selected for the charging station. The approximate weight of all these parts is about 10236 kg and the price of all these parts is about 517664 €. All prices are from 2020 and are subject to change.
Ključne besede: wFoil 18 Albatross, hydrofoil, fuel cell drive, hydrogen technology
Objavljeno v DKUM: 11.10.2023; Ogledov: 361; Prenosov: 5
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6. Reactivation system for proton-exchange membrane fuel-cellsCarlos Restrepo, Oriol Avino, Javier Calvente, Alfonzo Romero, Miro Milanovič, Roberto Giral, 2012, izvirni znanstveni članek Opis: In recent years, Proton-Exchange Membrane Fuel Cells (PEMFCs) have been the focus of very intensive researches. Manufacturers of these alternative power sources propose a rejuvenation sequence after the FC has been operating at high power for a certain period of time. These rejuvenation methods could be not appropriate for the reactivation of the FC when it has been out of operation for a long period of time or after it has been repaired. Since the developed reactivation system monitors temperature, current, and the cell voltages of the stack, it could be also useful for the diagnostic and repairing processes. The limited number of published contributions suggests that systems developing reactivation techniques are an open research field. In this paper, an automated system for reactivating PEMFCs and results of experimental testing are presented.
Ključne besede: reactivation system, PEM fuel cell, automated system
Objavljeno v DKUM: 21.06.2017; Ogledov: 3370; Prenosov: 369
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