Página 1 dos resultados de 10440 itens digitais encontrados em 0.028 segundos

A dinâmica urbana na otimização da infra-estrutura para o gás natural; Urban Dynamics in the natural gas infrastructure optimization

Massara, Vanessa Meloni
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 18/10/2007 PT
Relevância na Pesquisa
46.09%
Na tomada de decisão, para construção e ampliação das redes de infra-estrutura, diferentes fatores devem ser considerados para a priorização do atendimento a áreas que constituirão um mercado consumidor potencial para o serviço em questão. Neste trabalho, propõe-se a análise conjunta de aspectos sociais, técnicos e econômicos associados ao processo de ocupação dos grandes centros urbanos, como base para verificação de estimativas de mercado, custos e técnicas mais apropriadas para a ampliação da infra-estrutura de distribuição canalizada de gás natural. Como base ao estudo proposto, sugere-se a criação de um modelo, que integre a compreensão da dinâmica urbana às estratégias de expansão da rede de distribuição de gás, caracterizando as possibilidades de consumo em faixas de atratividade. A metodologia desenvolve-se através da organização de 4 sistemas de informações: aspectos de qualidade de vida, planejamento urbano, projeções de demanda por estratificação em tipos de uso do solo e características da obra civil. Relacionando dados sociais ao consumo estimado por tipo de ocupação do solo às características de ramificação da rede, a metodologia permite classificar cada área que compõe uma cidade segundo a viabilidade (atratividade) de implantação da rede de distribuição de gás e os locais com potencial de adensamento da rede já existente. Para verificação da coerência metodológica...

Perspectivas estratégicas para grandes consumidores industriais frente às mudanças regulatórias com a inclusão do livre acesso às redes de distribuição de gás natural canalizado no Estado de São Paulo; Strategic insights for Large Industrial Consumers facing regulatory changes with the introduction of Open Access for the Local Natural Gás Distribution Network in the State of São Paulo.

Burghetti, Bruno Spagnuolo
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 27/04/2010 PT
Relevância na Pesquisa
56.08%
A análise competitiva é focada na indústria de gás, entendida na dimensão da(s) Distribuidora(s) e Comercializada(s). O principal objetivo da pesquisa é contribuir na identificação de propostas estratégicas para os grandes consumidores (indústrias). Observa-se que esses consumidores deverão enfrentar uma nova estrutura regulatória, que exigirá uma eventual migração de um mercado regulado para outro livre, após a introdução da regulamentação do livre acesso às redes de distribuição de gás natural no Estado de São Paulo. Além disso, caracterizam-se os possíveis ambientes de efetivação da abertura do mercado e do livre acesso, bem como de consolidação da figura da Comercializadora de gás natural. O trabalho demonstra a dificuldade de se estabelecer um ambiente de maior concorrência em indústrias que convivem com um agente econômico dominante e que pode influenciar todas as dimensões do modelo teórico das Seis Forças Competitivas (adaptado a partir de Michael Porter). São identificadas as tendências de oferta e demanda nos mercados de gás do Brasil e do Estado de São Paulo. Além disso, o trabalho dedica-se a extensiva apresentação de modelos estruturais e contratuais que caracterizam as indústrias de gás em diferentes momentos de evolução e maturação. Procura-se mostrar que a indústria gasífera brasileira...

Redução de assimetria de informação na revisão tarifária da distribuição de gás canalizado no Brasil: proposta de uma metodologia baseada na análise da geração de valor; Reduction of Asymmetry of Information in the Tariff Revision in the Brazilian Pipeline Gas Distribution: Proposal for a Methodology through Value Generation Analysis

Marques, Fernando Mario Rodrigues
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 19/06/2009 PT
Relevância na Pesquisa
56.02%
A tarefa de regular um mercado estruturado sob a forma de monopólio natural, como no caso da distribuição de gás canalizado no Brasil, implica assegurar o equilíbrio econômicofinanceiro das firmas reguladas, garantindo, ao mesmo tempo, modicidade tarifária e nível de excelência na qualidade dos serviços prestados. Para isso, a questão da formação de preços é crítica, pois envolve aspectos do excedente e sua distribuição. Por esta razão, dentre as atribuições do órgão regulador, destaca-se o estabelecimento de regras tarifárias que conciliem os interesses dos consumidores e da empresa regulada. Entretanto, a tarefa de desenhar tarifas justas é afetada pela assimetria de informações entre o órgão regulador e a firma regulada, em favor da última. Este trabalho sugere a incorporação da metodologia do Economic Value Added EVA® no processo de revisão tarifária. Tal incorporação, conforme demonstrado, permite ao regulador avaliar a geração de valor do setor e reduzir a assimetria informacional entre concessionárias e agência reguladora. Além disso, facilita o repasse de eventuais excessos de geração de valor aos consumidores, em benefício da sociedade. Palavras-chaves: Assimetria de informação...

Uma Análise do Mercado e do Preço Competitivo de Gás Natural em São Paulo; An Analysis of Market and Competitive Pricing of Natural Gas in São Paulo

Gomes, Ieda Correia
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 06/11/1996 PT
Relevância na Pesquisa
46.1%
O desenvolvimento de uma indústria de gás natural no Brasil tem sido debatido com mais ênfase desde meados da década de 80, quando diversos estados, desejosos de diversificar sua matriz energética, provendo o mercado com um energético de inegável apelo ambiental, reuniram-se em Brasília, sob a égide da Comissão Nacional de Energia e iniciaram as primeiras projeções de demanda e de uso nal para o gás natural. Desde então, a indústria de gás no pais tem apresentado índices signicativos de crescimento, com a criação de novas empresas concessionárias de distribuição e o aumento do consumo, notadamente nos estados de São Paulo, Minas Gerais, Bahia e Rio de Janeiro. A perspectiva de importação de gás boliviano, com a assinatura, em 1992, de um primeiro protocolo de intenções entre a Petrobrás e a Yacimientos Petrolíferos Fiscales Bolivianos- YPFB, gerou um longo processo de negociações entre a estatal brasileira e as distribuidoras de gás canalizado de São Paulo (Comgás), Minas Gerais (Gasmig), Rio de Janeiro (CEG), Mato Grosso do Sul (Enersul), Paraná (Compagás), Santa Catarina (SC Gás) e Rio Grande do Sul (SuIgás), visando a assinatura de contratos de suprimento com prazo de 20 anos. O principal impasse à concretização desses contratos diz respeito à definição do preço máximo do gás no ponto de entrega às concessionárias ("city gate")'...

Análise espectral de uma série histórica de danos sobre uma rede subterrânea de distribuição de gás natural em regiões metropolitanas no estado de São Paulo = : Spectral analysis of a real third party excavation damanges time series data in a natural gas distribution network in metropolitan areas; Spectral analysis of a real third party excavation damanges time series data in a natural gas distribution network in metropolitan areas

Sérgio Rodrigues
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 21/11/2012 PT
Relevância na Pesquisa
56.01%
Neste trabalho foi utilizada uma série histórica de dados reais de danos sofridos na rede de distribuição de gás natural da concessionária Comgás, em sua área de concessão no estado de São Paulo abrangendo 177 municípios das regiões metropolitanas de São Paulo, Campinas, Baixada Santista e Vale do Paraíba. Com a análise desses dados foi observado que a ocorrência de danos na rede subterrânea de distribuição de gás natural é composta por harmônicas de diferentes frequências e amplitudes. Através da aplicação da transformada de Fourier a série histórica de dados de danos, identificou-se a presença de quatro harmônicas e seus respectivos períodos e magnitudes. De posse desses coeficientes de Fourier aplicou-se a eles a série de Fourier e construiu-se um modelo matemático que representou a função dano com um intervalo de confiança de 94% tornando assim possível prever sua intensidade no domínio do tempo.; This study used a real third party excavation damages time series data on a natural gas distribution network that belongs to Comgás in your concession area, Brazil, São Paulo state with 177 cities included in metropolitan areas as São Paulo, Campinas, Santos and Vale do Paraiba, demonstrates that this occurrence is droved by harmonic or cycled forces with different frequencies am magnitudes. Due to the application of Fourier transform at the historical damages time series data there was an identification of four harmonic forces and your periods and magnitudes. With this Fourier coefficients identified was applied to a Fourier series to model the third party damage function in time domain. This model gets a 94% of confidential interval and becomes able to prevent damages or time periods with more incidences of damages.

Gas Reform in Ukraine : Monopolies, Markets, and Corruption

Lovei, Laszlo
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Relevância na Pesquisa
46.11%
Reform of the natural gas industry in Ukraine started a year later than reform of the power industry. Because gas reform had no blueprint, its direction has remained ambiguous. That ambiguity is the result of a conflict between those who advocate vertically integrated, opaque, monopolistic structures and those who want a transparent, competitive gas market governed by stable rules. This conflict will likely continue for several years, making the ultimate outcome difficult to predict. More by accident than by design, the reform produced a number of innovative features that might be of interest for other countries planning to restructure and privatize their gas industries.

International Gas Trade : The Bolivia-Brazil Gas Pipeline

Law, Peter L.; de Franco, Nelson
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Relevância na Pesquisa
56.12%
The Bolivia-Brazil natural gas pipeline, which will transport natural gas more than 3,000 kilometers, will cost US$2.1 billion to construct. Despite the substantial benefits for both Bolivia and Brazil and the involvement of reputable private partners, the perceived risks and complexities of this large project made financing it a major challenge. The pipeline will link supply in one country to a potential market is another. Neither of these countries has a tradition of independent regulation or economic pricing of fuels. And the pipeline will be the first major gas infrastructure project involving the private sector in Brazil, where the natural gas market is underdeveloped and the gas distribution infrastructure still very limited. This Note explains the historical factors that shaped the project, how the financing package came together, and the role the pipeline will play in liberalizing the Brazilian hydrocarbon sector.

Vietnam : Framework for Thermal BOT Tenders and Strategy for Gas Coordination and Harmonization with Market Roadmap, Volume 1

World Bank
Fonte: Washington, DC Publicador: Washington, DC
EN_US
Relevância na Pesquisa
46.12%
The purpose of this Volume 1 report is to explore how development of the gas andelectricity sectors can be better coordinated within this dynamic environment. In particular,this report aims to: Briefly outline the gas resources and developments in Vietnam, and describe the current institutional arrangements for the gas sector and how they relate to overall gas and electricity planning; Identify key gas sector issues as they relate to gas and electricity sector planning in general and BOT electricity generation project development, and in particular identify the development and operating risks for a BOT electricity generation project developer and suggest mitigation measures for these risks ;Suggest mechanisms to improve gas and electricity planning coordination. Present a case study that illustrates some of the gas and electricity planning issues and how these would be addressed if the suggested planning changes were implemented. This assignment has been undertaken during a period of unprecedented change in Vietnam. The electricity sector is part way through the complex process of introducing a market. In global world energy markets...

Cameroonian LP Gas Sector Study

Belgedj, Mourad; Merklein, H.A.; Nkoto-Angoula, Joël
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
EN_US
Relevância na Pesquisa
46.1%
This study is a small-scale follow-up to an earlier World Bank study that analyzed the market failure of LPG in Nigeria and developed a roadmap to develop the use of LPG in that country to its full potential. Given the success of the Nigerian LPG work, it seemed obvious that other oil and gas-producing countries could benefit from the insights gained in Nigeria. Not unlike Nigeria, Cameroon has a thriving oil industry, yet it continues to flare most of its associated gas, burning more than enough LPG in the process to meet all its domestic needs and leave more for exports, while at the same time, it is importing LPG at world prices. Clearly, ifany country qualifies for an LPG policy review, it is Cameroon.

Designing Natural Gas Distribution Concessions in a Megacity: Tradeoffs between Scale Economies and Information Disclosure in Mexico City

Rosellon, Juan; Halpern, Jonathan
Fonte: World Bank, Washington, D.C. Publicador: World Bank, Washington, D.C.
EN_US
Relevância na Pesquisa
56.05%
In 1995 the Mexican government initiated structural reform of the natural gas sector-reform that permitted private investment in transportation, storage, distribution, trade and marketing while maintaining a State monopoly in production. It prepared a detailed regulatory framework to implement the sector liberalization, including an element to develop distribution systems through concessions in specific geographic areas. The concessions are bid and the winner is permitted physical exclusivity for 12 years in gas distribution but not in gas marketing. In each concession award process a distribution geographical area is defined and minimum consumer coverage targets are established. Bidders present technical and financial proposals, including a market demand study. The winning proposal must be technically sound and offer the lowest average revenue for the first five-year period. Densely populated geographic areas pose a problem for exclusivity in distribution. If the concession is granted to a single firm, scale economies might be very attractive...

Greenfield Gas Distribution : Cross-country Experience

World Bank
Fonte: Washington, DC Publicador: Washington, DC
EN_US
Relevância na Pesquisa
66.21%
The study aims to present information about specific countries which have initiated gas distribution projects rather than suggestions. However, by drawing on the experience of a large number of countries, it also aims to provide practical lessons about issues which could potentially foster or impede gas distribution projects. The study emphasizes how countries vary in terms of the level of development of gas distribution networks. Chapter 3 outlines the major factors contributing to such diversity. These factors fall into three categories which form the basis for analyzing gas distribution in the countries selected in the study : supply-side factors, demand-side factors and policy choices of governments

Private Participation in the Transmission and Distribution of Natural Gas : Recent Trends

Izaguirre, Ada Karina
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Viewpoint; Publications & Research
ENGLISH
Relevância na Pesquisa
46.14%
This paper examines the increasing participation of the private sector in the transmission and distribution of natural gas in developing countries during the 1990s, resulting mainly from the growing demand for new gas transport facilities coinciding with a growing consensus in favor of private participation in infrastructure. This note, drawing on the bank's PPI (Private Participation in Infrastructure) Project database, provides an overview of the patterns and trends in the projects in the twenty six developing countries which introduced private participation in natural gas between 1990 and 1997. It concludes with the thought that growth in privately funded and operated export projects promise s to bring the economic and environmental benefits of natural gas to a larger number of countries.

Connecting Colombia's Poor to Natural Gas Services : Lessons Learned from a Completed Output-Based Aid Project

Mandri-Perrott, Cledan
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Brief; Publications & Research
ENGLISH
Relevância na Pesquisa
56.08%
The Global Partnership on Output-Based Aid (GPOBA) has recently completed a project that made 35,000 new natural gas connections to poor households in Colombia's Caribbean coastal region. This partnership between GPOBA and Fundacion Promigas (a charitable foundation established by Colombian gas distribution holding company, Promigas) has resulted in substantial benefits to Colombia's poor population. Because in-home natural gas connections provide a safer, more environmentally friendly, and less expensive substitute to previously used fuels, poor families are enjoying the long-term advantages from this program's one-time subsidies. This note explores the results of this program and draws lessons for future projects.

Regulatory Reform in Mexico's Natural Gas Industry : Liberalization in the Context of a Dominant Upstream Incumbent

Rosellon, Juan; Halpern, Jonathan
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Policy Research Working Paper; Publications & Research
ENGLISH; EN_US
Relevância na Pesquisa
56.16%
The natural gas industry combines activities with natural monopoly characterisitics with those that are potentially competitive. Pipeline transport and distribution, which have natural monopoly characterisitcs, require regulation of price and non-price behavior. Production is a contestable activity, but in a few countries (including Mexico) it remains a state monopoly. Gas marketing is also contestable, but the presence of a dominant, upstream, vertically integrated incumbent may pose significant barriers to entry. Market architecture decisions--such as horizontal structure, regional development, and the degree of vertical integration--are also crucial. The authors report that Mexico has undertaken structural reform in the energy sector more slowly than many other countries, but it has introduced changes to attract private investment in natural gas transport and distribution. These changes were a response to the rapid growth in demand for natural gas (about 10 percent a year) in Mexico, which was in turn a response to economic development and the enforcement of environmental regulations. The new regulatory framework provides incentives for firms to invest and operate efficiently and to bear much much of the risk associated with new projects. It also protects captive consumers and improves general economic welfare. The continued vertical integration of the state-owned company Pemex and its statutory monopoly in domestic production posed a challenge to regulators. Their response in liberalizing trade...

Bulgaria : Options to Improve Security of Gas Supply

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Economic & Sector Work :: Energy Study; Economic & Sector Work
ENGLISH; EN_US
Relevância na Pesquisa
46.12%
This report presents the findings of a study aiming to define the least cost short (up to 2015) and medium term (up to 2020) measures that the Government of Bulgaria (GoB) can implement to meet gas security of supply requirements seen in the light of Bulgaria's vulnerability to gas supply disruptions and its increasingly important role for regional gas cross-border transmission and trade. Bulgarian gas demand is of modest size (3.0 bcm in 2011) and natural gas only plays a small role in Bulgaria's energy mix (14 percent of the total primary energy supply). Over the next ten years gas demand patterns are likely to change, however, and consumption levels are expected to grow steadily. The growth rate of gas demand and its importance in the supply mix will be driven by choices of electricity generation strategy and the rate of household gasification. There is a significant risk that a gas-focused electricity strategy would reduce Bulgaria's overall security of supply. However, this would only be the case if the new gas supply was contracted from the same sources and routes as the existing contracts (from Russia via Ukraine) and if the gas-fired power plants did not have back-up fuels. Conversely...

Turkey's Experience with Greenfield Gas Distribution since 2003

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Publications & Research :: ESMAP Paper; Publications & Research
ENGLISH; EN_US
Relevância na Pesquisa
66.2%
The objective of the report is to provide an assessment of Turkey's progress with gas distribution projects. The report aims to provide a detailed analysis of Turkey's current experience with gas distribution, which can possibly serve as an example for greenfield gas distribution for other countries, especially for those that are undergoing gas market liberalization. In addition, it aims to highlight some major challenges which, if addressed, will help to ensure successful progress in Turkey's gasification in the next decade. The report examines the following: specifics of Turkey 's new model for greenfield gas distribution; progress in gas distribution projects through the end of 2005 regarding the level of gasification, completed investment, and the ability of licensees to meet their requirements; Perspectives of distribution companies on major issues related to Turkey's new distribution model; major drivers of Turkey's recent experience with gas distribution; and current and potential challenges faced by the sector. The report is based on a field study conducted in Turkey in December 2005. It reflects on consultation with distribution companies representing 26 distinct distribution regions (out of the total of 35 as in the end of 2005).

Vietnam - Gas Sector Development Framework : Final Report

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Economic & Sector Work :: Other Environmental Study
ENGLISH
Relevância na Pesquisa
46.12%
Vietnam's gas sector is at a critical point. Vietnam's gas industry, from the producing field to the end-user, is already a vital component of the nation's energy economy and has the potential for major growth. Successes in the past decade have created a strong prospective demand for gas. However, Vietnam has begun to experience gas shortages. If the gas sector is to meet the rising demand for gas, there are challenges that must be addressed promptly. If certain key decisions are not made soon, these gas shortages can be expected to worsen with potentially serious economic impacts. To achieve its stated objectives for developing national gas resources, Vietnam must seek to create a 'moving train' of projects that will convert gas resources into proven reserves and production. It must also stimulate investment in the development of the requisite pipeline infrastructure as well as incentivize investment in gas consuming loads downstream such as power plants. And this will require gas pricing in consuming sectors (particularly the electricity sector) to be appropriately linked with gas pricing in the upstream gas exploration and production sector. Much remains to be done if Vietnam is to realize the potential it sees in its gas resources. This report proposes a vision...

Output-Based Aid in Colombia : Connecting Poor Households to Natural Gas Service

Mandri-Perrott, Cledan; Patella, Dominic
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Brief; Publications & Research
ENGLISH
Relevância na Pesquisa
56.14%
Natural gas connections could bring substantial benefits to poor households in Colombia.compared with other fuels typically used for cooking, natural gas is safer, less expensive, and less environmentally damaging. But even though gas is more affordable, connection fees can put the cost of switching to this fuel out of reach for poor families. The situation in Colombia, with families unable to afford connection fees but able to pay monthly gas service bills, is well suited to the one-time use of output measurable outputs. The Global Partnership on Output-Based Aid (GPOBA) subsidy is designed to make each connection economically feasible while still requiring beneficiary families to make a substantial financial contribution. The project serves as a pilot program, demonstrating a model that regional gas distribution companies can replicate throughout Colombia to speed access to piped natural gas for poor households. By transferring performance risks to privately held regional distribution companies, GPOBA's output-based subsidy approach provides incentives for quality work and timely project completion. GPOBA's effort in Colombia is an example of how output-based aid can increase accountability and leverage the strengths of private firms to produce tangible results.

Policy Options for Reducing Natural Gas Leaks in Massachusetts

Smith, Becky
Fonte: Universidade Duke Publicador: Universidade Duke
Tipo: Masters' project
Publicado em 25/04/2014
Relevância na Pesquisa
56.05%
Massachusetts’ natural gas distribution systems – pipes delivering gas for fuel into homes and businesses – are leaking large quantities of gas due to aging and crumbling infrastructure – primarily pipes made of the outdated materials cast iron and unprotected steel. This is problematic in several ways. First, public safety is at risk from explosions and fires from the leaked gas; second, uncombusted methane in natural gas is a more potent global warming gas than carbon dioxide – contributing to climate change; and third, ratepayers bear the cost of the lost gas, as well as the costs of publicly- and privately-owned trees and shrubs that are harmed by soil health damage near the leaks. This master’s project explores actions being taken or considered in Massachusetts and in states with similar gas infrastructure to reduce natural gas leaks, and includes recommendations to achieve further reductions. A comparative case study approach was used to examine Massachusetts, Pennsylvania, New York, and federal policy activity. Methods for the case studies included examination of publicly-available materials as well as interviews with individuals from different areas of expertise or leadership with respect to gas distribution systems. Findings indicate that there is no single...

Multi-criteria evaluation of the expansion of natural gas distribution network by the urban dynamics (doi: 10.4090/juee.2010.v4n2.055062)

Massara, Vanessa Meloni; Udaeta, Miguel Edgar Morales
Fonte: JUEE Press Publicador: JUEE Press
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 13/06/2011 ENG
Relevância na Pesquisa
65.96%
The objective of this work is to analyze the expansion of the infrastructure of natural gas distribution, identifying priorities from large metropolis using the energy planning based on urban design tools like urban dynamics and techniques like AHP. The methodology proposed uses matrices considering the relations between the concept of urban dynamics, quality of life and the possibilities of natural gas displacing other energy forms. The matrices are made up of information about social and urban development, costs of establishing the infrastructure and projections of the consumption potential in various sectors. Relating the consumption to urban development parameters and the real estate future of the areas in study, the methodology allows to indicate the viability of a gas network for each district. As conclusion, the model presents the integration between the cities profile and the natural gas use, by means of a growing natural gas use in districts of São Paulo City as a specific case study.