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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Gettelfinger, G. Dahlgren, F. Perry, E. Walsh, J. Walton, G.R. Bush, H. |
| Copyright Year | 1989 |
| Description | Author affiliation: Plasma Phys. Lab., Princeton Univ., NJ, USA (Gettelfinger, G.; Dahlgren, F.; Perry, E.; Walsh, J.; Walton, G.R.) |
| Abstract | The Tokamak Fusion Test Reactor (TFTR) has twenty toroidal-field (TF) coils with a maximum current rating of 73 kA for 3.6 s when cooled with water. Operation of the TF array at this maximal current produces a 5.2-T magnetic field at a major radius of 2.48 m. Repetition rate is dependent upon the efficiency of the cooling system for the array. An alternative approach to the water cooling would be to circulate a silicate ester (oil) in the coils. This technique would improve the electrical insulation of a leaking coil because, unlike water, the oil will not dissolve electrolytes and, therefore, retains a high dielectric strength as it wets the insulation. The oil cooling system is composed of a pump, heat exchanger and piping, and associated control and protective action circuits. Due to higher viscosity and lower heat capacity than water, oil removes 0.89 MW (maximum) at 12 L/s for each coil (1.4 MW at 12 L/s for water). This decreases the repetition rate to one maximum power pulse every 900 s, as opposed to one every 300 s for water. A thermal analysis is presented, and the equipment and controls are described. A flow diagram for the system is provided.< |
| Starting Page | 1181 |
| Ending Page | 1184 |
| File Size | 406854 |
| Page Count | 4 |
| File Format | |
| DOI | 10.1109/FUSION.1989.102423 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1989-10-02 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Petroleum Coolants Coils Cooling Dielectrics and electrical insulation Oil insulation Water heating Tokamaks Testing Inductors |
| Content Type | Text |
| Resource Type | Article |
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