Steam Boilers, Engines, Nozzles and Turbines
The proximate analysis of fuel lists

Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight
Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash

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Steam Boilers, Engines, Nozzles and Turbines
The function of a valve rod is

To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To provide simple harmonic motion to the D-slide valve
To provide reciprocating motion to the slide valve
To convert reciprocating motion of the piston into rotary motion of the crank

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Steam Boilers, Engines, Nozzles and Turbines
In designing air preheaters, the important design consideration is that

Stack gases should not be cooled to the dew point
Handling and maintenance should be easier
Approach temperature should be as low as possible
Heat transfer area should be optimum

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