Info

1435t 1700-f 13333 "C; j?79rq

Enthalpy atu/lb (IfJ/kgJ

1435t 1700-f 13333 "C; j?79rq

Enthalpy atu/lb (IfJ/kgJ

Fig. 7-5 Section View of Gas-Fired Industrial Boiler. Source: Babcock & Wilcox

Btu/h or kJ/h (HHV basis). Boiler capacity or output may be specified as heat (Btu or kJ per hour), as steam flow (lbm or kg of steam per hour) or as boiler horsepower (BHP). Boiler horsepower is defined differently from mechanical horsepower; the following relationships are commonly assumed (at 212°F or 100°C):

Fig. 7-6 Steam-Water Temperature Profile for Gas-Fired Industrial Boiler. Source: Babcock & Wilcox and for metals, primarily by electronic movement. The rate of heat transfer through materials, due to a temperature difference for one-dimensional conduction, is given by Fourier's law, and is expressed as:

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