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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Сравнительный анализ деятельности центров коллективного пользования в области современного материаловедения : магистерская диссертация / Comparative analysis of the centers of collective use in the field of modern materials science

Чернова, А. А., Chernova, A. A. January 2015 (has links)
Currently, the development of science and technology is a very acute issue in Russia. All the scientific potential of Russia gradually flows down abroad with the ideas, developments and scientific staff. State and entrepreneurs create special platforms which are adapted to the modern scientific trends to perform research activities. Such organizations are beginning to exist independently and produce some results of their activities. It is known that any organization needs to assessment and analysis of the efficiency of their work - need to understand positive results. Only in this case, the organization has the right to exist as an effectively operating enterprise. Objective of the work: to compare the centers of collective use for identify indicators of the major parameters of the effectiveness of the CCU, which can be recommended and included in the development plan of less efficient CCU. / В настоящее время в России очень остро стоит вопрос развития науки и технологий. Весь научный потенциал России плавно стекается за рубеж вместе с идеями, разработками и научными сотрудниками. Государством и предпринимателями создаются специальные платформы, которые адаптированы к современным научным течениям, для осуществления научной деятельности. Данные организации начинают самостоятельно существовать и выдавать некие результаты деятельности. Как известно, любая организация нуждается в оценке или анализе эффективности своей работы – необходимо осознание положительного результата деятельности. Только в этом случае, организация имеет право на существование в качестве эффективно-действующего предприятия. Цель работы: провести сравнительный анализ центров коллективного пользования для выявления показателей основных параметров эффективности деятельности ЦКП, которые могут быть рекомендованы и включены в план развития менее эффективных ЦКП.
2

The technical potential of renewable natural gas (RNG) in the United States, and the economic potential of methanation-derived RNG in Texas

Ólafsson, Brynjólfur Víðir 03 February 2015 (has links)
Renewable Natural Gas (RNG) is a low-carbon fuel source that is derived from the anaerobic digestion (AD) or thermal gasification (TG) of biomass, or produced using renewable electricity through the methanation of carbon dioxide. This thesis uses a thermodynamic balance to determine the total technical potential of RNG in the United States, as well as the future technical potential of methanation-derived RNG based on growth curves for renewable electricity. Furthermore, this work establishes an analytic decision-making framework for determining on a rolling basis, from an economic standpoint, whether to sell electricity directly to the grid, or produce and sell methanation-derived RNG. This framework is used to establish the economic potential of RNG, based on Texas wind resources. This work details the formulation of a model that determines which production option generates more marginal profit, based on fluctuating electricity and gas prices. The model also aggregates the total amount of electricity and RNG sold, assuming that the main objective is to maximize the marginal profit of integrated wind- and methanation facilities. This work concludes that the annual technical potential of methanation-derived RNG nationally was 1.03 Quads in 2011. The technical potential of biomass-derived RNG was 9.5 Quads. Thus, the total 2011 technical potential of RNG in the United States was 10.5 Quads, or equal to roughly 43% of the total US consumption of natural gas that year. Assuming a constant, 80% electrolyser efficiency, the technical potential of methanation-derived RNG is expected to rise at an average rate of 1.4% per year, following growth curves for renewable power, until the year 2040, when it will be 1.54 Quads. The 2011 economic potential of methanation-derived RNG in Texas was between 2.06×10⁷ MMBTU and 3.19×10⁷ MMBTU, or between 19.4% and 30.1% of the corresponding annual technical potential. Furthermore, the total marginal profit increase from introducing the option of producing and selling methanation-derived RNG was around $366 million, given a ‘best case scenario’ for the state of Texas. / text
3

Wind turbines application for energy savings in Gas transportation system

Mingaleeva, Renata January 2014 (has links)
The Thesis shows the perspectives of involving renewable energy resources into the energy balance of Russia, namely the use of wind energy for the purpose of energy supply for the objects of the Russian Gas transportation system. The methodology of the wind energy technical potential calculation is designed and the wind energy technical potential assessment for onshore and offshore zones of Russia is presented. The analysis of Russian Gas transportation system in terms of energy consumption is carried out when comparing the map of wind resources in Russia with the map of Russian Gas transportation system and the perspective of wind turbines installation is shown in order to offset energy consumption of the selected object of the Gas transportation system. The decision-making algorithm for wind turbines selection is developed for installation on the wind farm. Also indicators of investment attractiveness of the project of using wind turbines for compression stations energy supply were calculated.

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