Lithuania
Using Hydrogen Reactors to Improve the Diesel Engine Performance
Apr 2022
Publication
This work is aimed at solving the problem of converting diesel power drives to diesel– hydrogen fuels which are more environmentally friendly and less expensive alternatives to diesel fuel. The method of increasing the energy efficiency of diesel fuels has been improved. The thermochemical essence of using methanol as an alternative fuel to increase energy efficiency based on the provisions of thermotechnics is considered. Alternative methanol fuel h Read More
Hydrogen Addition Influence for the Efficient and Ecological Parameters of Heavy-Duty Natural Gas Si Engine
May 2017
Publication
The paper presents the experimental research results of heavy-duty vehicle (public transport bus) fuelled with natural gas and hydrogen fuel mixtures. Spark ignition six cylinder engine tested with different hydrogen additions (from 5% up to 20% according to volume) in the natural gas fuel. The tests were performed on heavy-duty vehicle’s dyno test stand in company “SG dujos Auto” research laboratory. The tests were carried out at three load point Read More
Implementation of hydrogen plasma activation of Mg powder in two steps hydrogenation
Oct 2017
Publication
Development of technologically and economically feasible solutions for hydrogen storage stimulates progress in hydrogen economy. High gravimetric and volumetric capacities of magnesium hydride makes it promising material capable to accelerate implementation of hydrogen-based technologies in our daily life. However widely discussed limitations of sorption kinetics and thermodynamic properties must be managed in MgH2. This work investigates tw Read More
Effect of Hydrogen Addition on the Energetic and Ecologic Parameters of an SI Engine Fueled by Biogas
Jan 2021
Publication
The global policy solution seeks to reduce the usage of fossil fuels and greenhouse gas (GHG) emissions and biogas (BG) represents a solutions to these problems. The use of biogas could help cope with increased amounts of waste and reduce usage of fossil fuels. Biogas could be used in compressed natural gas (CNG) engines but the engine electronic control unit (ECU) needs to be modified. In this research a spark ignition (SI) engine was tested for mi Read More
RANS Simulation of Hydrogen Flame Propagation in an Acceleration Tube: Examination of k-ω SST Model Parameters
Sep 2021
Publication
Due to practical computational resource limits current simulations of premixed turbulent combustion experiments are often performed using simplified turbulence treatment. From all available RANS models k-ε and k-ω SST are the most widely used. k-ω SST model is generally expected to be more accurate in bounded geometries since it corresponds to k-ε model further from the walls but switches to more appropriate k-ω model near the walls. Howeve Read More
Hydrogen or Electric Drive—Inconvenient (Omitted) Aspects
May 2023
Publication
Currently hydrogen and electric drives used in various means of transport is a leading topic in many respects. This article discusses the most important aspects of the operation of vehicles with electric drives (passenger cars) and hydrogen drives. In both cases the official reason for using both drives is the possibility of independence from fossil fuel supplies especially oil. The desire for independence is mainly dictated by political considerations. This a Read More
Simulation of Turbulent Combustion in a Small-scale Obstructed Chamber Using Flamefoam
Sep 2021
Publication
Dynamic overpressures achieved during the combustion are related to the acceleration experienced by the propagating flame. In the case of premixed turbulent combustion in an obstructed geometry obstacles in the direction of flow result in a complex flame front interaction with the turbulence generated ahead of it. The interaction of flame front and vortex significantly affect the burning rate the rate of pressure rise and achieved overpressure the Read More
Impact of Grid Gas Requirements on Hydrogen Blending Levels
Oct 2021
Publication
The aim of the article is to determine what amount of hydrogen in %mol can be transferred/stored in the Estonian Latvian and Lithuanian grid gas networks based on the limitations of chemical and physical requirements technical requirements of the gas network and quality requirements. The main characteristics for the analysis of mixtures of hydrogen and natural gas are the Wobbe Index relative density methane number and calorific value. The calculatio Read More
Probabilistic Analysis of Low-Emission Hydrogen Production from a Photovoltaic Carport
Oct 2024
Publication
This article presents a 3D model of a yellow hydrogen generation system that uses the electricity produced by a photovoltaic carport. The 3D models of all key system components were collected and their characteristics were described. Based on the design of the 3D model of the photovoltaic carport the amount of energy produced monthly was determined. These quantities were then applied to determine the production of low-emission hydrogen. Read More
An Overview of Hydrogen’s Application for Energy Purposes in Lithuania
Nov 2023
Publication
Hydrogen has emerged as a promising climate-neutral energy carrier able to facilitate the processes of the European Union (EU) energy transition. Green hydrogen production through the electrolysis process has gained increasing interest recently for application in various sectors of the economy. As a result of the increasing renewable energy developments in the EU hydrogen is seen as one of the most promising solutions for energy storage challenges; Read More
An Assessment of Current Hydrogen Supply Chains in the Gulf Cooperation Council (GCC)
May 2024
Publication
The Gulf Cooperation Council (GCC) comprising: Saudi Arabia United Arab Emirates Kuwait Qatar Oman and Bahrain is home to an abundant number of resources including natural gas and solar and wind energy (renewables). Because of this the region is favourably positioned to become a significant player in both blue and green hydrogen production and their export. Current dependence on fossil fuels and ambitious national targets for decarbonisation Read More
Evaluating the Potential for Underground Hydrogen Storage (UHS) in Lithuania: A Review of Geological Viability and Storage Integrity
Feb 2025
Publication
The aim of this study is to review and identify H2 storage suitability in geological reservoirs of the Republic of Lithuania. Notably Lithuania can store clean H2 effectively and competitively because of its wealth of resources and well-established infrastructure. The storage viability in Lithuanian geological contexts is highlighted in this study. In addition when it comes to injectivity and storage capacity salt caverns and saline aquifers present less of a challenge th Read More
Numerical Modelling Assessment of the Impact of Hydrogen on the Energy and Environmental Performance of a Car Using Dual Fuel (Gasoline–Hydrogen)
Feb 2025
Publication
The utilization of “green” hydrogen in transportation areas gives rise to production- and supply infrastructure-related challenges; therefore its wider application in automotive transport would lead to higher demand with cost reduction and a faster expansion of the hydrogen refuelling network. This study presents energy and environmental performance indicators analyses of a Nissan Qashqai J10 engine during the Worldwide Harmonised Light Vehi Read More
Prospects of Solar Energy in the Context of Greening Maritime Transport
Mar 2025
Publication
The aim of this article is to examine existing technologies for the use of electrical energy and to develop proposals for their improvement on maritime vessels. As a criterion for evaluating the effectiveness of alternative energy sources on ships factors such as greenhouse gas emissions levels production and transportation characteristics onboard storage conditions and technoeconomic indicators have been proposed. The analysis of fuel types reveals t Read More
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