Low Emission Technologies for High-Performance Handheld Outdoor Products

A novel hybrid aircraft propulsion based on the DEA compressor—Part A: Design

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/09544100211025349 ◽

2021 ◽

pp. 095441002110253

Author(s):

Babak Aryana

Keyword(s):

High Performance ◽

Static Condition ◽

Propulsion System ◽

Hybrid Propulsion ◽

Pulse Detonation ◽

Low Emission ◽

Wide Range ◽

Exit Nozzle ◽

Distributed Propulsion ◽

Detonation Process

This two-part article introduces a novel hybrid propulsion system based on the DEA compressor. The system encompasses a Pulse Detonation TurboDEA as the master engine that supplies several full-electric ancillary thrusters called DEAThruster. The system, called the propulsion set, can be categorized as a distributed propulsion system based on the design mission and number of ancillary thrusters. Part A of this article explains the design process comprising intake, compressor, detonation process, diffuser, axial turbine, and the exit nozzle. The main target is to design a high-performance low emission propulsion system capable of serving in a wide range of altitudes and flight Mach numbers that covers altitudes up to 20,000 m and flight Mach number up to the hypersonic edge. Designing the propulsion set, the design point is considered at the static condition in the sea level. Design results show the propulsion set can satisfy all requirements necessary for its mission.

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High Performance Transparent Conducting Sb-Doped SnO2 Films Fabricated by Spray Pyrolysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.684.85 ◽

2013 ◽

Vol 684 ◽

pp. 85-89 ◽

Cited By ~ 1

Author(s):

Qian Zhao ◽

Xue Qing Xu ◽

Gang Xu

Keyword(s):

Optical Properties ◽

Spray Pyrolysis ◽

High Performance ◽

Spray Pyrolysis Method ◽

Infrared Emissivity ◽

Electrical And Optical Properties ◽

Transparent Conducting ◽

Pyrolysis Method ◽

Low Emission ◽

Structural Surface

Sb-doped SnO2 (ATO) films were successfully prepared by the spray-pyrolysis method with SnCl2•2H2O and SbCl3 as precursors. The structural, surface morphological, electrical and optical properties of the films were studied in details. The results indicated that all films consisted of tetragonal cassiterite SnO2 with preferred orientation along (110) and (200) crystal plane. A minimum resistivity as low as 1.59×10-3 Ω∙cm has been achieved. The infrared emissivity of the films on the surface of glass was ca. 0.36, which presents potential application in the low-emission window and building ceramics.

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Advanced Coal-Fired Power Plants

Journal of Energy Resources Technology ◽

10.1115/1.1348270 ◽

2000 ◽

Vol 123 (1) ◽

pp. 4-9 ◽

Cited By ~ 7

Author(s):

Lawrence A. Ruth

Keyword(s):

Power Systems ◽

Flue Gas ◽

High Performance ◽

Power Plants ◽

Pilot Scale ◽

Combined Cycle ◽

Department Of Energy ◽

Electric Power Plants ◽

Air Temperatures ◽

Low Emission

The U.S. Department of Energy is partnering with industry to develop advanced coal-fired electric power plants that are substantially cleaner, more efficient, and less costly than current plants. Low-emission boiler systems (LEBS) and high-performance power systems (HIPPS) are based, respectively, on the direct firing of pulverized coal and the indirectly fired combined cycle. LEBS uses a low-NOx slagging combustion system that has been shown in pilot-scale tests to emit less than 86 g/GJ (0.2 lb/106 Btu) of NOx. Additional NOx removal is provided by a moving bed copper oxide flue gas cleanup system, which also removes 97–99 percent of sulfur oxides. Stack levels of NOx can be reduced to below 9 g/GJ (0.02 lb/106 Btu). Construction of an 80 MWe LEBS proof-of-concept plant is scheduled to begin in the spring of 1999. Engineering development of two different HIPPS configurations is continuing. Recent tests of a radiant air heater, a key component of HIPPS, have indicated the soundness of the design for air temperatures to 1150°C. LEBS and HIPPS applications include both new power plants and repowering/upgrading existing plants.

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Fuel Flexible Distributed Combustion for Gas Turbine Engines

Volume 5: 6th International Conference on Micro- and Nanosystems; 17th Design for Manufacturing and the Life Cycle Conference ◽

10.1115/detc2012-70246 ◽

2012 ◽

Author(s):

Ahmed E. E. Khalil ◽

Ashwani K. Gupta

Keyword(s):

Gas Turbine ◽

High Performance ◽

Low Noise ◽

Liquid Fuels ◽

Low Emission ◽

Wide Range ◽

Efficient Combustion ◽

Pollutants Emission ◽

Significant Performance ◽

Reduction Of Nox

Distributed Combustion provides significant performance improvement of gas turbine combustors including uniform thermal field in the entire combustion chamber (improved pattern factor), ultra low emission of NOx and CO, low noise, enhanced stability and higher efficiency. Distributed combustion with swirl have been investigated to determine the beneficial aspects of such flows on clean and efficient combustion under simulated gas turbine combustion conditions with close focus on NOx emission. Near Zero emissions of NO and CO have been demonstrated using methane under distributed combustion conditions with heat release intensities commensurable to gas turbine applications. In this paper, distributed combustion is further investigated using both gaseous and liquid fuels with emphasis on pollutants emission and combustor performance with each fuel. Performance evaluation with the different fuels is established to outline the flexibility of the combustor in handling a wide range of fuels with different calorific values and phases with focus on ultra-low pollutants emission. Results obtained on pollutants emission and OH* chemiluminescence for the specific fuels examined at various equivalence ratios are presented. Near distributed combustion conditions with less than 5 PPM of NO emission were demonstrated under novel premixed conditions for the various fuels tested thus outlining the combustor ability to handle different fuels with high performance. Further reduction of NOx can be made with true distributed combustion condition.

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