Given two sensor channels, A and B. How does one diagrammatically depict 1 out of 2 logic such that you get 2 trip circuit outputs? Is this called "1 out of 2 taken twice" logic?
Presently, I input a 4-20 mA signal into my DCS which represents 0 to 700 MW. I need to retransmit that signal over a communication data link as -700 MW to +700 MW. How is this accomplished? Can someone please describe the SAMA logic which would represent this signal conversion?
Can anybody provide the necessary equation(s) to calculate ammonia slip? Also, what inputs and constants are required? The application is for a combined-cycle gas fired 2x1 power plant with an SCR. The system uses 28% aqueous ammonia and NOx is sampled before and after the SCR section.
According to ASME PTC 19.3, for steam velocities >300 fps, a fixed beam type thermometer well is recommended. Can anyone provide a sketch or drawing of such a thermowell or simply explain how it differs from a standard tapered well?
