Articles
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Numerical simulation of turbulent dispersion on a two-way facing traffic road
A Large Eddy Simulation (LES) model was developed to investigate vehicle-induced turbulence and its effect on turbulent dispersion. The instantaneous behaviour of vehicle exhausts and the time-space averaged distributions of flow and concentration statistics on the roadway were estimated. The patterns of mean flow are significantly different between the one-way and the two-way traffic cases. In ...
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Influence of nitrogen limitation on performance of a microbial fuel cell
We describe the operation of a microbial fuel cell (MFC) system operating on a synthetic wastewater (acetic acid), under conditions of increasing nitrogen limitation. Two MFCs were operated under feed conditions which spanned a range of TKN/COD values of 1.6–28 mg/g. Stable operation was observed in all cases, even when no ammoniacal nitrogen was added to the cell. Improved electrochemical ...
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Cellulosic biofuel plant - Case study
Cellulosic Biofuels meets National Emission Standards for Hazardous Air Pollutants A multitude of new cellulosic bio-fuel processing facilities across the country are now faced with having to meet new National Emission Standards for Miscellaneous Organic Chemical Manufacturing. One specific NESHAP is 40 CFR part 63, subpart FFFF. The applicability of meeting this NESHAP is: A facility must be a ...
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Supply and demand: key trends in carbon consumption
Hugh Jones, Managing Director of Carbon Trust Advisory, investigates eight key trends Carbon Trust Advisory predicts will have an impact over 2012 and beyond Regulatory pressures, the need to improve efficiency and save money, and the promise of reputational gain have driven many large organisations to look at how they can measure and reduce carbon in their own business. As carbon reduction ...
By Carbon Trust
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Efficient steam production in paper mills
The paper and pulp industry is an energy and emission intensive industry. Steam is an essential part of the paper making process with steam boilers, steam distribution systems and other processes accounting for a large percentage of a paper mill’s energy costs. Useful energy is often lost from boilers and process equipment such as heat exchangers, dryers, evaporators etc, as well as from ...
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Soot level – a diesel engine lube oil condemning limit
While there is widespread disagreement on used-diesel oil condemning limits, it is well known that excessive soot in the lube oil causes abnormal valve and injection-train wear. It can also increase exhaust emissions and clog filters. Typically, the suggested limit for soot is in the neighborhood of 3% but can go much higher. With the new ASTM Method D7686, truck, bus, ship, locomotive, and ...
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Development of automotive DI diesel engine to comply with stringent emission norms
Relatively lower fuel energy cost, higher fuel conversion efficiency and ability to take higher loads are the attracting features of direct injection diesel engines. However, diesel engines are still posing the challenges to both researchers and manufacturers in terms of high soot and NOx emissions. To overcome these difficulties, small diesel engine manufacturers are resorting to either upgrade ...
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Power Sector Opportunities for Reducing Carbon Dioxide Emissions: Michigan
According to new WRI analysis, in the near- to mid-term, Michigan can meet and possibly exceed future emissions standards for existing power plants. The state has renewable energy (RPS) and energy efficiency standards in place that are already set to achieve significant reductions in CO2 emissions from the power sector. WRI analysis finds that Michigan can reduce its CO2 emissions 33 percent ...
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CO 2 emission and firm heterogeneity: a study of metals and metal-based industries in India
Industrial energy efficiency has emerged as one of the key issues in India. The increasing demand for energy that leads to growing challenge of climate change has resulted major issues. It is obvious that high-energy intensity leads to high carbon intensity of the economy. This paper is an attempt to estimate the firm level CO 2 emissions for the metals and metal-based industries in Indian ...
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Off-shore platform uses fast-cycle psa to recover stranded gas case study
Venoco Inc. Situation: Restricted space and limited on-board gas processing solutions forced oil producer on off-shore platform to re-inject high-carbon dioxide laden associated gas Solution: Installation of a Xebec PSA to dehydrate and separate C02 & heavy light hydrocarbons in the associated gas to meet California regulatory sales gas specification. Benefits: Xebec PSA provides a cost ...
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Performance and emission characteristics of CI engine, fuelled with diesel and oxygenated fuel blends
Vegetable oils are a potential alternative towards partial or total substitution of diesel fuels. In this study, we used ethanol as the solvent, and a bio fuel enhancer as additive to explore the possible use of higher percentages of biodiesel in an unmodified diesel engine. Biodiesel was produced from cashew nut shell liquid (CNSL) by pyrolysis process. A mixture containing 80% (by volume) of ...
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Weather claims and wind safety
Anybody working in the construction industry either here in the UK or anywhere else in the world is likely to know that the weather can present us with particular hazards. While rain, ice and snow are particularly dangerous to work in, we must always be aware that the wind is also likely to make conditions unsafe, particularly for those who work at height and those who operate access machinery ...
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Role of biomass questioned for clean power plan
In a May 8, 2015, letter, Senators Ed Markey (D-MA) and Elizabeth Warren (D-MA) requested that EPA reconsider its decision to treat biomass as having zero emissions under the proposed Clean Power Plan (Plan). The Senators point out "wood-burning power plants emit around 3,000 pounds of carbon dioxide per megawatt-hour," and would not assist in achieving the carbon reductions intended by the Plan. ...
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New Study: Biofuel Use Saved 589.3 Million Tons of Carbon Emissions Over the Past Decade
Over its 10-year lifespan, the Renewable Fuel Standard’s (RFS) requirement to substitute biofuels for fossil fuels has displaced nearly 1.9 billion barrels of foreign oil and reduced U.S. transportation-related carbon emissions by 589.33 million metric tons, the Biotechnology Industry Organization (BIO) finds in an analysis released today. Brent Erickson, executive vice president of ...
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How to choose a data plan for your Symphonie series data logger
The package has arrived, and you're ready to install the Symphonie series data logger and iPackGPS communications module at your project site. But one question remains: which wireless data plan should you choose? Once you understand the basics of how your logger operates, it's easy to make the right decision. This quick guide will help you on your way. CURRENT DATA LOGGER MODELS SymphoniePLUS3 ...
By NRG Systems
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Unexpected Benefits of RNRG’s Global Reach
It always amazes me when I think about how this small company in Vermont, U.S.A., has been supplying products to over 160 countries for almost 35 years. While this is an impressive statistic, it is only important if it means something to our customers. For example, why would a wind developer in India care if we are sending our data loggers to Japan? While it may not seem obvious on the surface, ...
By NRG Systems
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Why Schools Need Lightning Detectors
On May 6, 2015 two spectators of a high school soccer game were struck by lightning. On this particular occasion, the grandparents of Pocohontos Middle School in Henrico County, Virginia were lucky in that they survived the lightning strike. Sadly in the same year, Francois Clarence was not so lucky when lightning struck at his school. Francois, 17 years old, was playing field hockey at his ...
By SkyScan USA
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Non-Profits Release Report On Improvements To The European Commission’s Bioenergy Policy
On September 5, 2016, a group of non-profits, including Oxfam International, Fern, and Greenpeace, published a report outlining policy measures that should be taken by the European Commission (EC) to ensure that bioenergy is as low-carbon and resource efficient as possible. The report, "A New EU Sustainable Bioenergy Policy Report," was published after EC stated a willingness to listen to new ...
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Case study - SP, Technical Research Institute of Sweden
Customer: SP, Technical Research Institute of Sweden Project: WetESP for Fire Laboratory Many fire tests are made in full scale. Example for fire tests can be engine rooms, vehicles, store houses, compartments etc. Most of the tests will include ignite phase, full fire and extinguishing. The ignite phase is sooting, full fire will give high temperatures (500-700 °C) and the extinguish phase ...
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Green Energy GEE, China - Case Study
Using a PP20 v5 and working with university partners, Shenzhen Green & clear world Environmental Engineering (GEE) is developing a syngas-to-liquid reactor. Focusing on the commercialization of environmentally responsible projects, GEE's Power Pallet is part of a program to process municipal solid waste (MSW) into a transportation fuel. They are working to integrate their system into the ...
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