Enerji Sistemleri Mühendisliği Bölümü Koleksiyonu

Permanent URI for this collectionhttps://gcris.khas.edu.tr/handle/20.500.12469/49

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Now showing 1 - 7 of 7

Citation Count: 2
Geopolitics and gas-transit security through pipelines
(Springer International Publishing, 2020) Aydın, Mustafa; Bowlus, John V.; Aydın, Mustafa
Hydrocarbons are valuable only if they can be transited from where they are produced to where they are consumed. Despite the enduring importance of transit to the global energy system, the topic did not begin to be extensively analyzed until contentious relations between Russia and Ukraine disrupted natural gas flows to Europe in 2006. This chapter examines the geopolitics and security of transiting gas through pipelines by exploring the connection between geography, global energy strategies, and natural gas markets. Gas has grown in recent years as a percentage of global energy consumption and is helping the world transition to a cleaner energy regime. At the same time, it is intensifying the contest for and control of gas-transit routes. Russia, the world’s second-largest producer, has built new pipelines to Europe since 2006 in order to diversify its flow from relying on Ukraine, while the USA, the world’s largest gas producer, is increasingly exporting liquefied natural gas (LNG) through sea routes mostly controlled by the US navy. We argue that geostrategic calculations will more profoundly affect gas transit in the future and that countries that rely solely on market or commercial factors for their gas-transit security will become increasingly vulnerable to geopolitical volatility.
Citation Count: 0
Geopolitics of oil & gas
(Energy Institute, 2014) Ediger, Volkan S.
[Abstract Not Available]
Citation Count: 7
Geostrategic challenges in the oil and gas sectors
(Springer International Publishing, 2018) Ediger, Volkan S.; Berk, Istemi
This chapter identifies the major geostrategic challenges that have emerged during the last two decades and assesses their implications for the global oil and gas sectors. The historical development of oil prices shows that there have been two major periods of volatility 1973-1986 and 1998-present each of which was preceded by two relatively stable periods. The two oil price shocks of the 1970s that were triggered by geopolitical events had long-term effects on global politics and economics. Major oil and gas producers faced the challenges of declining consumption on the demand side as consumers turned to alternative energies energy efficiency improved and non-Organization of Petroleum Exporting Countries (OPEC) oil supplies increased. The crisis in the 2000s on the other hand had similar but more intense consequences deeply altering the structure of oil and gas markets. We identify two major challenges facing the oil and gas industry: energy substitution and resource scarcity. While the substitution of coal and renewables threatens to reduce oil and gas demand resource scarcity is expected to promote the development of unconventional hydrocarbon resources such as shale oil and gas and heavy oil. Unlike in the 1970s oil consumption did not decline when oil prices peaked in the 2000s. Moreover the recent fall in oil and gas prices created a fiscal challenge for conventional producers such as OPEC countries and non-OPEC countries like Russia and Mexico whose governmental budgets depend on export revenues. These fiscal challenges are expected to increase competition between national oil companies (NOCs) and international oil companies (IOCs) necessitating structural change in the governance of the industry. The NOCs are expected to continue dominating the industry and due to the increasing intervention of the corresponding governments the next decades could experience a rise in state capitalism not only in major oil and gas producing countries but also in the global energy business. © Springer International Publishing AG part of Springer Nature 2018.
Citation Count: 69
An integrated review and analysis of multi-energy transition from fossil fuels to renewables
(Elsevier Science Bv, 2019) Ediger, Volkan S.
We are in the midst of a transition from a fossil fuel-dominated energy regime to a more sustainable lower-carbon one in which natural gas is a bridge fuel. Since the 1970s oil crises, however, the forecasts for gas and coal have changed three times. Gas is currently achieving a major position in the world's energy mix but under challenging geopolitical forces; for this reason, different countries will follow different paths for adopting gas. This article uses a ternary diagram to shows that the fossil fuel consumption paths of the powers have greatly diverged over time. The close relationship between world hegemony and the dominant energy source (coal and then oil) in the past will be replaced by a multi-energy transition in which different countries choose different energy regimes in a multipolar international system. (C) 2019 The Authors. Published by Elsevier Ltd.
Citation Count: 1
Introduction: Energy economics finance and geostrategy
(Springer International Publishing, 2018) Dorsman, Andre B.; Ediger, Volkan S.; Karan, Mehmet Baha
Since countries’ economic independence is based on energy security decisions on energy economy and financing are assessed mainly by geostrategic considerations. Economically optimal decisions are not enough regarding geostrategy. This situation makes it difficult to make decisions in energy markets and it creates considerable controversy. The role of financial markets is to measure the risk of this complex structure or energy projects and price them in financial basis. Understanding behavior of energy markets it is necessary to look at them on an event basis. The limited availability and unequal distribution of energy sources and different pricing and cost mechanism of energy supplies are hardening to arrive a simple solution. Therefore the research articles of this book are aimed to open new perspectives for the reader and researchers. © Springer International Publishing AG part of Springer Nature 2018.
Citation Count: 4
THE NEW GEOPOLITICAL GAME IN THE CASPIAN REGION: AZERBAIJAN-TURKEY ENERGY RELATIONS
(Turkish Policy Quarterly, 2016) Ediger, Volkan S.; Durmaz, Duygu
The Caspian Basin has been one of the most important geopolitical scenes since the dissolution of the Soviet Union. The historical development of the basin in the last decade and a half provides us with some important clues about the dynamics of the new energy geopolitics. This article aims to examine geopolitical events that have occurred in connection with the hydrocarbon riches of the basin from a historical perspective. The focus of the article is mainly on the energy upstream and midstream projects developed between Turkey and the Caspian states, especially Azerbaijan. These significant events are investigated as part of nine "game" concepts. After examining these games thoroughly, the winners are listed according to their degrees with a discussion of results and possible conclusions.
Citation Count: 56
Transition and equilibration of neutral atmospheric boundary layer flow in one-way nested large-eddy simulations using the weather research and forecasting model
(2013) Kirkil, Gökhan; Kirkil, Gökhan; Bou-Zeid, Elie; Chow, Fotini Katopodes; Kosovic, Branko
The Weather Research and Forecasting Model permits finescale large-eddy simulations (LES) to be nested within coarser simulations an approach that can generatemore accurate turbulence statistics and improve other aspects of simulated flows.However errors are introduced into the finer domain fromthe nestingmethodology. Comparing nested domain flat-terrain simulations of the neutral atmospheric boundary layer with singledomain simulations using the same mesh but instead using periodic lateral boundary conditions reveals the errors contributed to the nested solution from the parent domain and nest interfaces. Comparison of velocity spectra shows good agreement among higher frequencies but greater power predicted on the nested domain at lower frequencies. Profiles of meanwind speed show significant near-surface deficits near the inflowboundaries but equilibrate to improved values with distance. Profiles of the vertical flux of x momentum show significant underprediction by the nested domain close to the surface and near the inlet boundaries. While these underpredictions of the stresses which cause the near-surface velocity deficits attenuate with distance within the nested domains significant errors remain throughout. Profiles of the resolved turbulence kinetic energy show considerable deviations from their single-domain values throughout the nested domains. The authors examine the accuracy of these parameters and their sensitivities to the turbulence subfilter stress model mesh resolution and grid aspect ratio and provide guidance to practitioners of nested LES. © 2013 American Meteorological Society.

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