Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The Arnold Engineering Development Center (AEDC) has been under contract with the Department of Energy (DOE) since December 1973 to conduct a magnetohydrodynamic (MHD) High Performance Demonstration Experiment (HPDE). The objective of this experimental research is to demonstrate the attainment of MHD performance on a sufficiently large scale to verify that projected commercial MHD objectives are possible. This report describes the testing of the system under power-producing conditions during the period from October 1, 1980 to September 30, 1981. Experimental results have been obtained with the channel configured in the Faraday mode. Test conditions were selected to produce low supersonic velocity along the entire channel length. Tests have been conducted at magnetic fields up to 4.1 Tesla (T) (70% of design). Up to 30.5 MW of power has been produced to date (60% of design) for an enthalpy extraction of approximately 11%. The high Hall voltage transient, observed during the previous series of tests has been reduced. The reduction is mostly probably due to the fuel and seed being introduced simultaneously. The replacement of the ATJ graphite caps on the electrode walls with pyrolytic graphite caps has resulted in significantly higher surface temperature. As a result, the voltage drop is some 60% of the cold wall voltage drop during the previous series of tests. However, the absolute value of the present voltage drop is still greater than the original design predictions. Test results indicate, however, that the overall enthalpy extraction objective can be achieved.
Author: United States. Air Force. Arnold Engineering Development Center Publisher: ISBN: Category : Electric power production Languages : en Pages : 140
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The objective of this experimental research, initiated in December 1973, is to demonstrate the attainment of MHD performance on a sufficiently large scale to verify that the projected efficiency of the commercial MHD concept is viable. To perform the experiment, an existing facility at the Arnold Engineering Development Center was refurbished and the new systems required for performing the experiment have been designed and built. In particular, the largest systems which have required the greatest portion of the expended effort are the generator channel and 6 Tesla (T) cryogenically cooled magnet. The generator channel is now complete and the magnet is approximately 85 percent complete. Proof testing of various components has been performed to the extent possible and extensive testing of the plasma generator with its ancillary systems in particular has been completed. During the period between October 1, 1978 and December 31, 1978, the assembly of the magnet continued with the installation of the force containment structure (FCS) and upper pole steel being completed. Final placement of the magnet was accomplished and initial testing of the magnet performance was started. In the course of this testing, an arc over occurred in the outlet end coolant tubes and the testing was terminated to effect remedial repairs. Prior to the arc over, three successful powered tests with a peak field strength slightly greater than 2 T were performed. Fabrication of the components for the subsonic diffuser and alignment of the generator channel sections on the channel cart were also completed in this period.
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Author: Aeronautical Research Council (Great Britain)
Author: United States. Air Force. Arnold Engineering Development Center
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