Performance evaluation for high speed vehicle in VANET

Vehicular Ad hoc Networks (VANETs) is a high dynamic emerging technology for supporting wireless communication among vehicles. Communication via routing packets over the high-speed vehicles is a challenging task. Vehicles mobility speed can varies depending on the road specification. However in highways speed can be increased up to 120 – 200 Km/hr. moving in high speed can affect the efficiency of data delivery. In particular V2I traffic where moving car trying to deliver data to fixed space units which are designed to collected and process data from vehicles. In this paper, we investigated the consequences on increasing vehicle mobility speed in term of data delivery evaluation metrics including network throughput, delay and packet delivery ration. Results shows that in high speed mobility VANET, network throughput it decreased, and packet delivery ration is decreased as well

Reduction behaviour in Fastmet(TM) pellets

Fastmet (TM), a process developed by the Midrex Corporation, produces iron for steelmaking by heating pellets composed of iron oxide and coal. Here we develop several simple models of the reduction process and confirm claims made by the manufacturer about the conversion time. These models can also be used to investigate the dependence of the conversion time on controlling parameters

The modern technology of iron and steel production and possible ways of their development

В изменяющейся мировой обстановке на рынке сырых материалов для черной металлургии разрабатывается ряд новых технологий по производству чугуна и стали, альтернативных существующим технологиям, которые способны обеспечить экономически устойчивую работу металлургических компаний. В дополнении к этому фокусируется внимание на экономии энергии и снижении выбросов парниковых газов в целях решения важнейших вопросов охраны окружающей среды. Изменение состояния окружающей среды ставит новые проблемы перед металлургической промышленностью, потребляющей значительные энергетические и топливные ресурсы. Отрасль вынуждена сосредоточить свое внимание на сокращении всех видов энергии, что приведет и к снижению выброса парниковых газов. Разработка альтернативных технологических процессов производства чугуна и стали способна обеспечить металлургическим компаниям экономически выгодную и устойчивую работу в производстве стали. Для оценки воздействий деятельности металлургических компаний на окружающую среду Инженерно-консалтинговой компанией ХАТЧ (НАТСH, Сanada) были разработаны новые методики моделирования, позволяющие квалифицированно и качественно оценивать риски в потреблении энергии и выбросах СО2 в металлургической промышленности. Методика для анализа выбросов углеродсодержащих парниковых газов названа G-CAP ™ (Зеленый Дом — Борьба с загрязнением воздуха углекислым газом), а для анализа энергоэффективности — En-MAPTM (Планирование действий при управлении энергией). Оценка существующего положения в большинстве интегрированных заводов показала, что они располагают возможностями по экономии энергии и борьбы с загрязнением атмосферы парниковыми газами, лучшие из этих заводов исчерпали эти возможности даже при высоких ценах на квоты выбросов СО2. В этом контексте важно оценить те важные особенности альтернативных технологий получения чугуна и стали, которые разработаны к настоящему времени. Эта статья содержит сравнительную оценку энергоэффективности и выбросов ПГ для некоторых выбранных альтернативных технологий производства чугуна и стали, которые рассматриваются для их реализации. Для этого применены методики G-CAP ™ и G-CAP ™ , элементы которых были разработаны в компании HATCH с основной целью количественной и квалификационной оценки потенциала экономии энергии и сокращения выбросов СО2 в металлургической промышленностиIn the changing global market scenario for raw materials for the steel industry, a number of novel iron and steelmaking process technologies are being developed to provide the steel companies with economically-sustainable alternatives for iron and steel-making. In addition, the steel industry is also focusing on reduction of energy consumption as well as green-house gas (GHG) emissions to address the crucial subject of climate change. Climate change is presenting new risks to the highly energy and carbon-intensive, iron and steel industry. The industry needs to focus on reduction of energy consumption as GHG emissions to address climate change. Development of alternate iron and steelmaking process technologies can provide steel companies with economically-sustainable alternatives for steel production. For managing climate change risks, novel modelling tools have been developed by Hatch to quantify and qualify potential energy savings and CO2 abatement within the iron and steel industry. The tool developed for abatement of greenhouse gas carbon is called G-CAPTM (Green-House Gas Carbon Abatement Process) while that developed for improving energy efficiency is called En-MAPTM (Energy Management Action Planning). Evaluation of existing operations have shown that most integrated plants have GHG and energy abatement opportunities; on the other hand, the best-in-class plants may not have a lot of low-risk abatement opportunities left, even at high CO2 price. In this context, it is important to assess these critical issues for the alternate iron and steelmaking technologies that have been developed. This paper presents a comparative evaluation of energy-efficiency and GHG emissions for some selected iron- and steelmaking technologies that are being considered for implementation. In this work, Hatch’s G-CAP™ and En-MAP™ tools that were developed with the main objective of quantifying and qualifying the potential energy savings and CO2 abatement within the iron and steel industry, were employed in the evaluation conducted

Machine learning-based prediction of a BOS reactor performance from operating parameters

A machine learning-based analysis was applied to process data obtained from a Basic Oxygen Steelmaking (BOS) pilot plant. The first purpose was to identify correlations between operating parameters and reactor performance, defined as rate of decarburization (dc/dt). Correlation analysis showed, as expected a strong positive correlation between the rate of decarburization (dc/dt) and total oxygen flow. On the other hand, the decarburization rate exhibited a negative correlation with lance height. Less obviously, the decarburization rate, also showed a positive correlation with temperature of the waste gas and CO2 content in the waste gas. The second purpose was to train the pilot-plant dataset and develop a neural network based regression to predict the decarburization rate. This was used to predict the decarburization rate in a BOS furnace in an actual manufacturing plant based on lance height and total oxygen flow. The performance was satisfactory with a coefficient of determination of 0.98, confirming that the trained model can adequately predict the variation in the decarburization rate (dc/dt) within BOS reactors. View Full-Tex

Steel: Price and Policy Issues

[Excerpt] The rapid growth of steel production and demand in China is widely considered as a major cause of continued high steel prices and prices of teelmaking inputs. Steel companies have achieved much greater pricing power, in part through an ongoing consolidation of the industry. High prices persist, despite the revocation in 2003 of President Bush’s broad safeguard order on imports. U.S. steel production in 2006 was 108 million tons. The integrated side of the industry continues to lose share domestically to the minimills. Imports rebounded in 2006 to reach the highest tonnage level ever, though they declined in 2007. Input prices, especially ferrous scrap and iron ore, remain high, meaning higher costs, which have been largely passed along to industrial consumers. China now produces 40% of the world’s steel and is the world’s largest steelmaker and steel consumer. This contributed to a large global increase in demand for both steel and steelmaking inputs. China has become a large net exporter as well. In 2006, its steel exports to the U.S. market more than doubled, and it became the second-largest import source. Congress became increasingly concerned over allegedly unfair trade competition from China, and has considered many proposals to deal with these issues. In the 110th Congress, bills were introduced to allow penalty tariffs to offset a country’s manipulation of its currency exchange rate for trade advantage. The Commerce Department undertook a countervailing duty case against China, and the U.S. government also brought a case in the World Trade Organization against China over subsidies, including subsidization of steel exports. The U.S. steel industry sponsored in 2007 a report that detailed alleged government subsidies to the Chinese industry. The U.S. International Trade Commission (ITC) has terminated some trade remedy cases and orders against imported steel products. But in other cases, orders have been upheld, and new cases are proceeding. President Bush decided in a China safeguard case not to provide relief for domestic producers of steel pipe, despite a positive ITC determination. The Byrd Amendment, under which domestic steel producers receive distributions of trade remedy duties, was repealed by P.L. 109-171, and is no longer in effect from October 1, 2007. Internationally, the Organization for Economic Cooperation and Development has abandoned the effort to achieve an international agreement to ban subsidies for steel mills. In April 2006 the World Trade Organization, (WTO) Appellate Body ruled against the “zeroing” methodology used by the U.S. Commerce Department in calculating dumping margins

East Asian Steel Projections for the 1990s Revisited

In 1989 a research team from the AustraliaJapan Research Centre (AJRC) undertook a study of the prospects for the East Asian steel industry for the 1990s. The aim was to assess the impact of developments in the region on industry strategies in Australia. This paper reviews those projections to see whether they were right or wrong. It also examines the growth of the East Asian industry over the last decade in the context of developments in the industry worldwide and reviews Australias position in regional iron ore and coal markets during the 1990s. The central focus of the AJRC study was on what opportunities might emerge in Australia for the supply of processed steel product to the East Asian region in the 1990s. The main conclusion was that East Asia would shift from being a long-time and significant net exporter of steel product to the rest of the world to being a significant net importer of steel product, given then established trends in production, consumption and trade. At the time, this was a radical conclusion. It had an important impact on thinking about trends in the regional steel market in Australia, in Japan and elsewhere in East Asia. The main conclusions of the AJRC study turned out to be correct. The industry did not adjust to the pressures in the market exactly as predicted, partly because of the financial crisis in East Asia and Japans domestic stagnation. However, the conclusions about the growth of China and its impact on regional steel trade were particularly prescient. In the last decade, China has become the worlds largest producer and consumer of steel while Japanese consumption and production have contracted. Both South Korea and Taiwan have increased their shares of production and consumption of steel. Australia has entrenched its position as the dominant supplier of iron ore and coking products to East Asia.steel, Projections, East Asia, Japan, Australia, iron ore, regional steel market

Stratification in steelmaking ladles

The problem of temperature stratification in a steelmaking ladle is considered. There are three distinct zones in the flow, the wall boundary layer, the bottom stagnation zone and the central plug flow. Typical length, velocity and time scales are determined for the flow and compared to numerical simulations. A model of the wall boundary layer using similarity solution techniques is detailed. Models for the temperature stratification in the bottom stagnation zone and the plug flow are included. Recommendations for reducing the temperature stratification in the ladle and improvements to their numerical simulation are made

Strategic implications of critical fixities under continuous technological change

Includes bibliographical references (p. 27-28)