scholarly journals Analysis of Changes in Natural Gas Physical Flows for Europe via Ukraine in 2020

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5175
Author(s):  
Filip Božić ◽  
Daria Karasalihović Sedlar ◽  
Ivan Smajla ◽  
Ivana Ivančić
Keyword(s):  
Natural Gas ◽  
Eastern European ◽  
Short Term ◽  
High Increase ◽  
Transit System ◽  
Research Findings ◽  
Gas Fuel ◽  
Nord Stream ◽  
In Transit ◽  
Energy Strategies

The main objective of the paper was comparative analyses of natural gas quantities delivered through the existing pipeline capacities in the last decade and new pipeline capacities for the prediction of possible future flows of gas import to Europe. Changes in physical flows have been influenced by European energy strategies that became green oriented resulting with a high amount of non-utilized transmission capacities. The research findings have shown that there is a significant decrease observed in transit of Russian gas through Ukraine in 2020 than previously. Concerning the high increase of LNG import to Europe in the same year, the start of operation of TurkStream, planned start of operation of Nord stream 2, authors project the gradual decrease of transit of Russian gas through Ukraine until the year 2025 with the total stop of transit of Russian gas until the year 2030. The change of supply routes will be also under the economic influence of low gas prices and coal and gas fuel switch until 2030 in the West EU, and after 2030 in the South Eastern European region. In the short-term period transit system for natural gas from Russia via Ukraine will be necessary for supplementing coal with natural gas in the energy mix.

scholarly journals The Outcome of Directive 2009/73/EC Amendment on EU’s Natural Gas Security

2019 ◽  
Vol 9 (1) ◽  
pp. 77-98
Author(s):  
Javad Keypour
Keyword(s):  
Natural Gas ◽  
Energy Security ◽  
Security Analysis ◽  
Secondary Sources ◽  
Political Analysis ◽  
Research Findings ◽  
Per Se ◽  
Nord Stream ◽  
European Technology ◽  
The Eu

AbstractThe European Commission has proposed an amendment on the Gas Directive 2009/73/EC to broaden the applicability of the Directive to all gas pipelines from/to the EU including Nord Stream 2. This research focuses on the question of whether the amendment can really boost EU’s natural gas security, by hindering Nord Stream 2. Thematic analysis has been employed as the methodology for analyzing collected data from primary and secondary sources, and relying on a legal and political analysis. The research findings show that although the amendment hinders Nord Stream 2, it also affects the operation of the existing interconnectors adversely. It also declines investors’ tendency for planned pipelines, which lowers EU’s energy security. Moreover, empowerment of the Commission in the proposed amendment curtails Member States’ plans to enhance their energy security. In addition, the security analysis of the research shows that Moscow’s ability to take advantage of its “energy weapon” is being defied because of dependence on European technology and finance, particularly under the sanction condition. Therefore, restraining Russian gas in the European market will not result in a higher level of energy security since reliable and affordable alternatives are not so available. Hence, all four elements of energy security—that is, affordability, availability, accessibility, and acceptability—are jeopardized by the proposed amendment. The current study concludes that although the amendment is expected to boost the energy security of the Union, it may now turn into a threat per se.

Air Quality Improvement by Reduction of Gas Turbines Emissions

2013 ◽  
Vol 308 ◽  
pp. 159-164 ◽  
Author(s):  
Jozef Žarnovský ◽  
Viera Petková ◽  
Róbert Drlička ◽  
Jozef Dobránsky
Keyword(s):  
Heavy Metals ◽  
Natural Gas ◽  
Gas Turbines ◽  
Electric Energy ◽  
Recent Time ◽  
Transit System ◽  
Effective Power ◽  
Air Quality Improvement ◽  
Harmful Substances ◽  
Transit Performance

The most serious sources of the air pollution are the studied company compressor stations of the transit system equipped with the number of gas turbine. [1] Pipeline parts have smaller degree of importance and gas boiler and emergency resources of thermal and electric energy have minimum influence. These sources emit into atmosphere mainly nitrogen oxide, carbon monoxide, paraffine with the exception of the methane and unburned rest of the fuel. In comparison with these emissions are emissions of sulfur dioxide and the solid contaminations substances minimal, insignificant. Along with reduction of transit performance deploys the company in recent time significantly more energy effective power units for transit of natural gas. These drive units are mainly gas turbines burning part of transported natural gas. [2] Russian natural gas is used as a fuel which in comparison with the others kinds of fuels contains only little amount of sulfur and contain almost no As, Na and heavy metals. The main parts of combustions are CO2, CO, NOx which are products of burning and N2, O2, untouched atmosphere elements. CO and NOx are considered to be harmful substances.

Fuel Flexibility Influences on Premixed Combustor Blowout, Flashback, Autoignition and Instability

2006 ◽  
Author(s):  
Tim Lieuwen ◽  
Vince McDonell ◽  
Eric Petersen ◽  
Domenic Santavicca
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Dynamic Stability ◽  
Current Understanding ◽  
Fuel Composition ◽  
Fuel Flexibility ◽  
Lean Premixed ◽  
Gas Fuel ◽  
The Impact ◽  
Underlying Processes

This paper addresses the impact of fuel composition on the operability of lean premixed gas turbine combustors. This is an issue of current importance due to variability in the composition of natural gas fuel supplies and interest in the use of syngas fuels. Of particular concern is the effect of fuel composition on combustor blowout, flashback, dynamic stability, and autoignition. This paper reviews available results and current understanding of the effects of fuel composition on the operability of lean premixed combustors. It summarizes the underlying processes that must be considered when evaluating how a given combustor’s operability will be affected as fuel composition is varied.

Purchasing behaviour and supplier base evolution – a longitudinal case study

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anna Dubois ◽  
Lars-Erik Gadde ◽  
Lars-Gunnar Mattsson
Keyword(s):  
Design Methodology ◽  
Longitudinal Case Study ◽  
Short Term ◽  
Supplier Relationships ◽  
Content Type ◽  
Research Findings ◽  
Purchasing Behaviour ◽  
Time Periods

Purpose The purpose of the paper is to describe and analyse the evolution of the supplier base of a buying firm and the reasons behind these changes. Design/methodology/approach The paper is based on a case study of the changes over 52 years in a sub-set of the supplier base of a firm manufacturing fork-lifts. Findings The study shows that some relationships feature substantial longevity. However, the duration of one-third of the total relationships is shorter than five years. There was considerable variation over time in the dynamics of the supplier base in terms of entries and exits of suppliers. Owing to this variation, research findings and conclusions in short-term studies are heavily dependent on the specific conditions at the time of the study. Finally, no less than one-fourth of the terminated supplier relationships were reactivated later. Research limitations/implications The study was designed in a time when purchasing was considered entirely from the perspective of the buying firm. Further studies, therefore, must increasingly emphasise the role of suppliers and the interaction in the buyer–supplier relationships, as well as the embeddedness in networks. Originality/value The findings of the study are unique in two ways. First, they are based on systematic observations over more than 50 years. Second, the study involves the purchases of 11 components representing different technical and economic features. The (few) previous studies are based on much shorter time periods and involves fewer suppliers/components. Moreover, the findings regarding re-activation of terminated relationships represent unique contributions.

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