scholarly journals Technical analysis of filter testing at the U.S. Department of Energy Filter Test Facility

2021 ◽  
Author(s):  
Osvaldo Pensado ◽  
George Adams ◽  
Imad Khalek
Keyword(s):  
Technical Analysis ◽  
Department Of Energy ◽  
Test Facility ◽  
Filter Test ◽  
The U.S

Ocean Thermal Energy Conversion Heat Exchangers: A Review of Research and Development

1985 ◽  
Vol 22 (01) ◽  
pp. 64-73
Author(s):  
Eugene H. Kinelski
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Low Cost ◽  
Cost Effective ◽  
Department Of Energy ◽  
Test Facility ◽  
Working Fluid ◽  
Ocean Energy ◽  
The U.S ◽  
Mechanical Cleaning

The goal of the OTEC heat exchanger program within the Division of Ocean Energy Systems in the U.S. Department of Energy was to develop designs, evaluate enhanced surfaces, and control biofouling using corrosion-resistant materials that were cost-effective. This report summarizes the available data on a closed-cycle OTEC power system and shows how such data could be applicable to heat exchangers used by the power industry, the U.S. Navy, and merchant ships. Ammonia was selected as the best choice for an OTEC working fluid because of its superior thermodynamics properties at the temperatures involved and its low cost. It was chosen for the advanced tests of the prototypical shell-and-tube and compact heat exchangers. The most effective biocontrol procedure for maintaining clean heat transfer surfaces in the evaporators was intermittent chlorination with possibly periodic mechanical cleaning. Preliminary, short-term test data indicated that cold seawater (at the Seacoast Test Facility at Ke-ahole Point, Hawaii) does not appear to cause fouling in condensers; however, long-term data are still needed to determine the level of biocontrol needed. Titanium and the high-alloy stainless alloys, such as AL-6X and AL-29-4C, are expected to provide the 30-year life in OTEC systems. The use of aluminum alloys is predicated upon the reduction of frequency of mechanical cleaning (to remove biofouling) that will reduce the erosion-corrosion of the heat-transfer surfaces.

Performance Testing in Oxygen of a High-Pressure, High-Volume Oxygen Compressor

1983 ◽  
Author(s):  
M. J. Tessier ◽  
R. A. Granger
Keyword(s):  
High Pressure ◽  
Rocket Engine ◽  
Performance Testing ◽  
High Volume ◽  
Department Of Energy ◽  
Test Facility ◽  
Liquid Oxygen ◽  
Operating Pressure ◽  
Test Program ◽  
The U.S

In connection with the Coal Gasification Program of the U.S. Department of Energy, a need was identified for a high-pressure, high-volume oxygen compressor. At the time, the highest steady operating pressure available from commercial-sized turbocompressors was about 65 bar (950 psia), which was being used in the partial oxidation process for ammonia or methanol synthesis. For advanced coal conversion plants, compressors operating at 115 bar (1667 psia) would be needed. The U.S. Department of Energy (DOE) entered into an agreement with the West German firm of Mannesmann Demag, AG, to develop a high-pressure oxygen compressor. Mannesmann Demag designed and fabricated a third casing centrifugal compressor (to be used in a train with available compressors) having a nominal inlet pressure of 65 bar (950 psia) and a nominal discharge pressure of 115 bar (1667 psia). In exchange, the U.S. DOE agreed to fund the modification and operation of a NASA-owned test facility for testing the compressor. The facility, CTL-V, was modified and operated by the Rocketdyne Division of Rockwell International. Test management and reporting was carried out by DOE’s Energy Technology Engineering Center (ETEC), operated by Rockwell International’s Energy Systems Group. This paper presents a brief description of the compressor test article and test facility. The test program, test results, and analysis are presented in greater detail. The scope of the test program included low- and high-pressure nitrogen shakedown tests, oxygen performance and steady-state tests, and oxygen maximum suction pressure tests. The facility is unique because it is the only one of its kind nationally that can provide the power to drive the compressor and that has liquid oxygen/liquid nitrogen capability (the facility is utilized for development and testing of rocket engine turbopumps). Also, testing and data acquisition, reduction, and analysis were performed in a facility that normally runs tests of few minutes duration (for rocket engine components) but that had to be converted to run endurance tests lasting several hundred hours.

Micropollutants Produced by Disinfection of Wastewater Effluents*

1982 ◽  
Vol 14 (12) ◽  
pp. 45-59 ◽  
Author(s):  
R L Jolley ◽  
R B Cumming ◽  
N E Lee ◽  
J E Thompson ◽  
L R Lewis
Keyword(s):  
Wastewater Treatment ◽  
Uv Irradiation ◽  
Base Pair ◽  
Wastewater Treatment Plants ◽  
Department Of Energy ◽  
Union Carbide Corporation ◽  
Organic Constituents ◽  
Chemical Effects ◽  
Base Pair Substitution ◽  
The U.S

The principal objective of this research program was to examine the effects of disinfection by chlorine, ozone, and ultraviolet light (uv) irradiation on nonvolatile organic constituents relative to chemical effects and the formation of micropollutants. In a comparative study of highly concentrated samples of effluents from nine wastewater treatment plants, it was determined that disinfection with chlorine or ozone both destroys and produces nonvolatile organic constituents including mutagenic constituents. The chemical effects of disinfection by uv irradiation were relatively slight, although the mutagenic constituents in one effluent were eliminated by this treatment. The nine wastewater treatment plants were selected by using the following criteria: disinfection method, nature of wastewater source, type of wastewater treatment, standards for quality of treatment, and geographical location. The treatment plants varied from pilot plant and small plants [0.05 m3/s (1 Mgd)] treating principally domestic waste to large plants [4.4 m3/s (100 Mgd)] treating principally industrial waste. Four plants used only chlorine for disinfection, four used ozone for disinfection, and one used uv irradiation for disinfection. Eight treatment plants used conventional secondary or more advanced wastewater treatment, and one plant used primary treatment. The following methodology was used in this investigation: grab sample collection of 40-L samples of undisinfected and disinfected effluents; concentration of the effluents by lyophilization; high-pressure liquid chromatographic separation of nonvolatile organic constituents in effluent concentrates using uv absorbance, cerate oxidation, and fluorescence detectors; bacterial mutagenicity testing of concentrates and chromatographic fractions; and identification and characterization of nonvolatile organic constituents in mutagenic HPLC fractions. With these procedures, over 100 micropollutants were identified in the wastewater effluent concentrates. Interplant comparison revealed considerable variability in the presence of mutagenic nonvolatile organic constituents in the undisinfected effluent concentrates as well as much variability in the destruction of the mutagenic constituents and the formation of other mutagenic constituents as a result of disinfection. Moreover, the effects varied on samples collected at the same wastewater treatment plant at different periods. No micropollutants known to be mutagens were identified in the mutagenic HPLC fractions separated from the undisinfected, chlorinated, and ozonated effluent concentrates. The mutagenic activity of the nonvolatile organic constituents in one chlorinated effluent concentrate was not attributable to organic chloramines. Most of the mutagens detected in effluent concentrates are direct acting and do not require metabolic activation. Both base-pair substitution mutagens and frame-shift mutagens occurred in the wastewater concentrates, but the former type was more frequent. For many of the compounds in effluents, strain TA-1535 was more sensitive than strain TA-100 in detecting base-pair substitution mutagens. *Research sponsored by the U.S. Department of Energy and the U.S. Environmental Protection Agency. The work was carried out at the Oak Ridge National Laboratory, which is operated by the U.S. Department of Energy under contract W-7405-eng-26 with the Union Carbide Corporation.

scholarly journals Direct Recycling R&D at the ReCell Center

Recycling ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 31
Author(s):  
Linda Gaines ◽  
Qiang Dai ◽  
John T. Vaughey ◽  
Samuel Gillard
Keyword(s):  
Lithium Ion Batteries ◽  
Rapid Growth ◽  
Energy Use ◽  
Lithium Ion ◽  
Department Of Energy ◽  
Central Feature ◽  
Recycling Technology ◽  
Waste Handling ◽  
Domestic Resource ◽  
The U.S

The expected rapid growth in electric vehicle deployment will inevitably be followed by a corresponding rise in the supply of end-of-life vehicles and their lithium-ion batteries (LIBs). The batteries may be reused, but will eventually be spent and provide a potential domestic resource that can help supply materials for future battery production. However, commercial recycling processes depend on profits from recovery of cobalt, use of which is being reduced in new cathode chemistries. The U.S. Department of Energy, therefore, established the ReCell Center in early 2019 to develop robust LIB recycling technology that would be economical even for batteries that contain no cobalt. The central feature of the technology is recovery of the cathode material with its unique crystalline cathode morphology intact in order to retain its value and functionality. Other materials are recovered as well in order to maximize revenues and minimize waste-handling costs. Analysis and modeling serve to evaluate and compare process options so that we can identify those that will be most economical while still minimizing energy use and environmental impacts. This paper provides background and describes highlights of the center’s first 2 years of operation.

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