A fuel of Qh = 6888 kcal/kg steam was bund in the furnace of a 223 m^2 water tube boiler which was generating 5443 kg steam per hour at 14.06 kg/cm^2 ab, d and s, fiom 109 °C feed, at a time when the fuel consumption was 612 kg per hour. (a) Find kcal rating and percent rating. (b) Calculate over-all thermal efficiency.

A fuel of Qh = 6888 kcal/kg steam was bund in the furnace of a 223 m^2 water tube boiler which was generating 5443 kg steam per hour at 14.06 kg/cm^2 ab, d and s, fiom 109 °C feed, at a time when the fuel consumption was 612 kg per hour. (a) Find kcal rating and percent rating. (b) Calculate over-all thermal efficiency.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.12P

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A fuel of Qh = 6888 kcalkg steam was bund in the funace of a 223 m? water tube boiler which was generating 5443 kg steam per hour at 14.06 kg/cm? ab, d and s, fiom 109 °C feed, at a time when the fuel consumption was 612 kg per how. (a) Find kcal rating and percent rating. (b) Calculate over-all thermal efficiency.
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