Lubrecht M.D.,Directed Technologies Inc.
Environmental Science and Technology | Year: 2012
Although HDD is recognized as an effective method to achieve cleanup goals at many contaminated sites, its role as part of a sustainable remediation effort has not been deeply explored. Environmental HDD, examined from the perspective of GSR, can be an effective tool in meeting sustainability goals for remediation. When designing a remediation effort, it is worth the effort to compare the long-term economic and environmental costs of installation, operation, and maintenance between systems based on horizontal wells and other methods, in many cases, HDD may prove to be a superior choice. © 2012 American Chemical Society. Source
Agency: National Science Foundation | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 399.92K | Year: 2000
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 75.00K | Year: 1997
87 LNG Storage and Delivery System Analysis--Directed Technologies, Inc., 4001 North Fairfax Drive, Suite 775, Arlington, VA 22203-1614; (703) 243-3383 Mr. Brian D. James, Principal Investigator Mr. Ira F. Kuhn, Jr., Business Official DOE Grant No. DE-FG02-97ER82357 Amount: $75,000 To reduce foreign fuel dependence and improve the Nation¿s air quality, new high-efficiency, direct-injection diesel engines running on natural gas are being developed for heavy-duty trucks. The trucking industry¿s preferred method to store natural gas is liquid natural gas; however, the current low (approximately 10¿ pounds per square inch absolute) pressure tank designs are incompatible with the high-pressure requirements (500-3,000 pounds per square inch absolute) to deliver the engine fuel. Thus a need exists to store liquid natural gas onboard so that high-pressure natural gas can be delivered to the new high-efficiency engines. Multiple potential storage and delivery systems could satisfy these requirements. Some combine a high-pressure tank having cryogenic insulation, while others utilize high-pressure fuel injectors or onboard reliquefaction devices. However, the optimal pressures, tank and insulation materials, construction methods, and peripheral system components have not been determined. A systems analysis must carefully balance all competing demands and assess the lowest cost, highest benefit liquid natural gas storage system for integration into the new class of high-efficiency engines. The Phase I project will examine, design, and evaluate multiple high-pressure cryogenic tanks and innovative fuel delivery systems. For each liquid natural gas system, various metal tank materials, fiber-wrapped pressure vessels, cryogenic insulation, cryo-cooler techniques, conformal tank geometries, and fuel pressurization techniques will be examined. Each system will be evaluated on the basis of weight, volume, dormancy/boil-off, storage system complexity, energy usage, refueling station impact, storage system cost, safety, and recyclability. Systems promising the highest payoff will be identified, and recommendations for further development will be made. In Phase II, work will be conducted with an industrial partner to fabricate the optimal storage system or critical components identified in Phase I. Commercial Applications and Other Benefits as described by the awardee: Identification and development of low-cost, liquid natural gas storage and delivery systems having superior performance will grant U.S. companies a strategic advantage in the worldwide race for energy efficient automotive subsystems.
Directed Technologies Inc. | Date: 2015-11-06
A drill assembly with a drill body coupled to a drilling string and a sonde body having a least one chamber defined therein for receiving locating electronics therein. In disclosed embodiment, the one or more chambers may be provided and the electronics can include a battery, a sensor, a transmitter, an antenna and connecting wires. One or more secure windows may be provided in the sonde body to allow the locating electronics to wirelessly transmit outside of the sonde body. The electronics may be potted within the chamber with a solidifying potting agent to improve durability of the electronics in a drilling environment.
Ahluwalia R.K.,Argonne National Laboratory |
Wang X.,Argonne National Laboratory |
Kwon J.,Argonne National Laboratory |
Rousseau A.,Argonne National Laboratory |
And 2 more authors.
Journal of Power Sources | Year: 2011
An automotive polymer-electrolyte fuel cell (PEFC) system with ultra-low platinum loading (0.15 mg-Pt cm-2) has been analyzed to determine the relationship between its design-point efficiency and the system efficiency at part loads, efficiency over drive cycles, stack and system costs, and heat rejection. The membrane electrode assemblies in the reference PEFC stack use nanostructured, thin-film ternary catalysts supported on organic whiskers and a modified perfluorosulfonic acid membrane. The analyses show that the stack Pt content can be reduced by 50% and the projected high-volume manufacturing cost by >45% for the stack and by 25% for the system, if the design-point system efficiency is lowered from 50% to 40%. The resulting penalties in performance are a <1% reduction in the system peak efficiency; a 2-4% decrease in the system efficiency on the urban, highway, and LA92 drive cycles; and a 6.3% decrease in the fuel economy of the modeled hybrid fuel-cell vehicle on the combined cycle used by EPA for emission and fuel economy certification. The stack heat load, however, increases by 50% at full power (80 kWe) but by only 23% at the continuous power (61.5 kWe) needed to propel the vehicle on a 6.5% grade at 55 mph. The reduced platinum and system cost advantages of further lowering the design-point efficiency from 40% to 35% are marginal. The analyses indicate that thermal management in the lower efficiency systems is very challenging and that the radiator becomes bulky if the stack temperature cannot be allowed to increase to 90-95 °C under driving conditions where heat rejection is difficult. © 2011 Elsevier B.V. All rights reserved. Source