With thin boiler walls
, many old engines are allowed to operate at no more than 70 pounds of steam, which does little more than move the engine.
The higher the level of excess combustion air, the lower the overall boiler efficiency due to 1) a reduction in the flame temperature, lowering radiated heat transfer from flame to boiler walls
, and 2) higher gas volumes passing through the boiler, increasing the flue gas velocity, reducing gas residence time, and thereby reducing the convected heat transfer to the boiler walls
By comparing the internal and external temperature of the boiler walls
and identifying heat loss, the company can calculate the material's resistance and infer its thickness.
"The state of Minnesota required double thickness on that type of plumbing before it would pass the ultrasound test on the thickness of the boiler walls
, and then the hydro test, with the boiler filled with water and pressurized at 1-1/2 times its highest pressure to check for leaks.
By measuring the internal and external temperature of the boiler walls and identifying heat loss, it is possible to calculate the material's resistance and infer its thickness.
This non critical monitoring of the boiler walls presented Total Petrochemicals with the perfect opportunity to evaluate Emerson's SmartWireless technology on a large scale and in a real industrial environment.
(Florham Park, N.J.) are located on the boiler walls
to reduce nitrogen oxides.
ranged from 1/4 to 5/16 inch thick, but for the bigger steam traction engines, that wasn't big enough.