Characterization of open-cycle coal-fired MHD generators. Quarterly technical summary report No. 6, October 1--December 31, 1977. [PACKAGE code]
Research has included theoretical modeling of important plasma chemical effects such as: conductivity reductions due to condensed slag/electron interactions; conductivity and generator efficiency reductions due to the formation of slag-related negative ion species; and the loss of alkali seed due to chemical combination with condensed slag. A summary of the major conclusions in each of these areas is presented. A major output of the modeling effort has been the development of an MHD plasma chemistry core flow model. This model has been formulated into a computer program designated the PACKAGE code (Plasma Analysis, Chemical Kinetics, And Generator Efficiency). The PACKAGE code is designed to calculate the effect of coal rank, ash percentage, ash composition, air preheat temperatures, equivalence ratio, and various generator channel parameters on the overall efficiency of open-cycle, coal-fired MHD generators. A complete description of the PACKAGE code and a preliminary version of the PACKAGE user's manual are included. A laboratory measurements program involving direct, mass spectrometric sampling of the positive and negative ions formed in a one atmosphere coal combustion plasma was also completed during the contract's initial phase. The relative ion concentrations formed in a plasma due to the methane augmented combustion of pulverized Montana Rosebud coal with potassium carbonate seed and preheated air are summarized. Positive ions measured include K/sup +/, KO/sup +/, Na/sup +/, Rb/sup +/, Cs/sup +/, and CsO/sup +/, while negative ions identified include PO/sub 3//sup -/, PO/sub 2//sup -/, BO/sub 2//sup -/, OH/sup -/, SH/sup -/, and probably HCrO/sub 3/, HMoO/sub 4//sup -/, and HWO/sub 3//sup -/. Comparison of the measurements with PACKAGE code predictions are presented. Preliminary design considerations for a mass spectrometric sampling probe capable of characterizing coal combustion plasmas from full scale combustors and flow trains are presented and discussed.
- Research Organization:
- Aerodyne Research, Inc., Bedford, MA (USA)
- DOE Contract Number:
- EX-76-C-01-2478
- OSTI ID:
- 6440551
- Report Number(s):
- ARI-RR-116
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization of open-cycle coal-fired MHD generators. Quarterly technical summary report No. 3, January 1--March 31, 1977. [Negative ion formation, electron/slag interaction, and alkali/slag interaction]
Characterization of open-cycle coal-fired MHD generators. Revision A. Quarterly technical summary report No. 4, April 1--June 30, 1977. [Negative ion formation, electron/slag interaction, and alkali/slag interaction]
Related Subjects
01 COAL, LIGNITE, AND PEAT
COAL
COMBUSTION PRODUCTS
COAL-FIRED MHD GENERATORS
FLOW MODELS
SEED-SLAG INTERACTIONS
COMPUTER CODES
P CODES
MAGNETOHYDRODYNAMICS
ANIONS
ASHES
CATIONS
COMPUTER CALCULATIONS
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRON ATTACHMENT
MANUALS
MASS SPECTROSCOPY
OPEN-CYCLE MHD GENERATORS
PLASMA DIAGNOSTICS
SLAGS
SYSTEMS ANALYSIS
VAPOR CONDENSATION
CARBONACEOUS MATERIALS
CHARGED PARTICLES
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELECTRICAL PROPERTIES
ENERGY SOURCES
FLUID MECHANICS
FOSSIL FUELS
FUELS
HYDRODYNAMICS
IONS
MATHEMATICAL MODELS
MECHANICS
MHD GENERATORS
PHYSICAL PROPERTIES
RESIDUES
SPECTROSCOPY
300104* - MHD Generators- Duct Engineering & Fluid Dynamics
014000 - Coal
Lignite
& Peat- Combustion