Environment

Aircraft with Hybrid Engine Can Recharge in Flight

Researchers from the University of Cambridge, in association with Boeing, have successfully tested the first aircraft to be powered by a parallel hybrid-electric propulsion system, where an electric motor and gas engine work together to drive the propeller. The demonstrator aircraft uses up to 30% less fuel than a comparable plane with a gas-only engine. The aircraft is also able to recharge its batteries in flight, the first time this has been achieved.

Posted in: Batteries, Electronics & Computers, Power Management, Green Design & Manufacturing, Motion Control, Motors & Drives, Power Transmission, Aerospace, Aviation, News

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Energy Harvesting Could Help Power Spacecraft of the Future

A consortium is working on a project to maximize energy harvesting on a spacecraft of the future. The initiative seeks to find energy-saving and -maximizing solutions to enable eco-friendly aircraft to stay in space for long periods of time without the need to return to Earth to re-fuel, or to avoid carrying vast amounts of heavy fuel on long-stay journeys.

Posted in: Green Design & Manufacturing, Energy Efficiency, Energy Harvesting, Energy, Test & Measurement, Communications, Aerospace, Aviation, News

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Forensic Tracers Identify Contamination in Water

Duke University scientists have developed new forensic tracers to identify coal ash contamination in water and distinguish it from contamination coming from other sources. The tools can be used by regulatory agencies to monitor the environmental effects of coal ash, and determine whether it has or hasn’t impacted the environment. Previous methods to identify coal ash contaminants in the environment were based solely on the contaminants’ chemical variations. The newly developed tracers provide additional forensic fingerprints that give regulators a more accurate and systematic tool. The tracers, which have been tested both in the laboratory and the field, are based on the distinctive isotopic and geochemical signatures of two elements, boron and strontium, found in coal ash effluent. The U.S. EPA has submitted a proposal to the Office of Management and Budget to restrict coal ash disposal into the environment and, for the first time, establish federal regulations to govern how the ash is stored and disposed. Source:

Posted in: Environmental Monitoring, Green Design & Manufacturing, Test & Measurement, Monitoring, News

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Researchers Fabricate Rewritable Paper

Chemists at the University of California, Riverside have fabricated novel rewritable paper, one that is based on the color-switching property of commercial chemicals called redox dyes.  The dye forms the imaging layer of the paper. Printing is achieved by using ultraviolet light to photobleach the dye, except the portions that constitute the text on the paper. The new rewritable paper can be erased and written on more than 20 times, with no significant loss in contrast or resolution.“This rewritable paper does not require additional inks for printing, making it both economically and environmentally viable,” said Yadong Yin, a professor of chemistry, whose lab led the research. “It represents an attractive alternative to regular paper in meeting the increasing global needs for sustainability and environmental conservation.”SourceAlso: Learn about Biodegradable MEMS Based on Cellulose Paper.

Posted in: Green Design & Manufacturing, News

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New Coating Cools Buildings, Beams Away Heat

Stanford engineers have invented a revolutionary coating material that can help cool buildings, even on sunny days, by radiating heat away from the buildings and sending it directly into space.

Posted in: Green Design & Manufacturing, Materials, Coatings & Adhesives, Energy Efficiency, Energy, News

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NASA's Hot 100 Technologies: Environment

Contaminated Water Treatment This method offers a way of processing and recycling liquids to remove contaminants. The two-step process provides a contaminant treatment pouch, called a “urine cell” or “contaminant cell,” that converts urine or another liquid containing contaminants into a fortified drink, engineered to meet human hydration, electrolyte, and caloric requirements.

Posted in: Green Design & Manufacturing, Techs for License, Articles

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NASA Computer Model Reveals Carbon Dioxide Levels

An ultra-high-resolution NASA computer model has given scientists a stunning new look at how carbon dioxide in the atmosphere travels around the globe.Plumes of carbon dioxide in the simulation swirl and shift as winds disperse the greenhouse gas away from its sources. The simulation also illustrates differences in carbon dioxide levels in the northern and southern hemispheres, and distinct swings in global carbon dioxide concentrations as the growth cycle of plants and trees changes with the seasons.Scientists have made ground-based measurements of carbon dioxide for decades and in July NASA launched the Orbiting Carbon Observatory-2 (OCO-2) satellite to make global, space-based carbon observations. But the simulation — the product of a new computer model that is among the highest-resolution ever created — is the first to show in such fine detail how carbon dioxide actually moves through the atmosphere.In addition to providing a striking visual description of the movements of an invisible gas like carbon dioxide, as it is blown by the winds, this kind of high-resolution simulation will help scientists better project future climate. Engineers can also use this model to test new satellite instrument concepts to gauge their usefulness. The model allows engineers to build and operate a “virtual” instrument inside a computer.SourceAlso: Learn about the NASA Data Acquisition System (NDAS).

Posted in: Electronics & Computers, Environmental Monitoring, Green Design & Manufacturing, Greenhouse Gases, Software, Test & Measurement, Measuring Instruments, Aerospace, News

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