| OCR Text |
The evaluation of coal-water mixture as a fuel was conducted in this unit. Test Cell 2 houses a 20 MWt, 6 atmospheres magnetohydrodynamic (MHD) combustor and will be used in the near future for testing of a 50 MW unit. In addition, a new Test Cell 3 is currently under construction, which will house a 50 MM Btu/hr (nominal) atmospheric combustor. During testing, all operating parameters are controlled and monitored by a computer located in the Operations Control Room, which is linked to the combustors through satellite computers. In parallel, relevant test areas are continuously monitored by closed loop TV cameras. The combustion products are monitored in several locations in the combustor system by continuous emission analyzers. The flow loop used in the atomization tests were installed in a bay next to Test Cell 1. The CWM pipe line was extended to Cell 1 where the TRW slagging combustor is installed. The 17-Inch diameter combustor developed by TRW employed a vitiator as the source for preheated oxidant (air) which is generated by burning a predetermined amount of #2 fuel oil with oxygen and air in a refractory lined chamber. The slagging section of the combustor is a cylindrical confined vortex flow chamber (Figure 6). The CWM burner is located at the head-end of the combustion chamber. During combustion, as the slag layer builds up on the walls, the slag surface becomes molten, runs down the walls and flows into the water-filled tank through a slag tap. Instrumentation The test cell is fully instrumented for measurement of all required plant parameters and performance of all auxiliary equipment. A total of over 200 facility and test parameter channels were used. The test cell operation is controlled remotely by the main control room computer. The state-of-the-art control center not only controls and monitors all facility and test functions, but also provides digital and analog record of measured parameters. All test parameter measurements were presented in engineering units by on-line printer. Critical test sections were continuously monitored by video systems. Beside the facility and system parameters, also measured were the CWM, atomizer and oxidizer flow rates, heat loss from various combustor 7 |
