A boiler is used to heat steam at a brewery to be used in various applications such as heating water to brew the beer and sanitizing the brewing tanks. 73.0% of the heat produced by the boiler is used to create saturated steam at 12.0 bars (absolute) from liquid water at 22' C. If 140 m3/h of steam is needed, what rate of heat does the boiler output?

Question

Chemistry

Devan Andrews

22 August, 09:49

A boiler is used to heat steam at a brewery to be used in various applications such as heating water to brew the beer and sanitizing the brewing tanks. 73.0% of the heat produced by the boiler is used to create saturated steam at 12.0 bars (absolute) from liquid water at 22' C. If 140 m3/h of steam is needed, what rate of heat does the boiler output?

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Valentin · Answer 1

Q = m (h (p=10.0 bar, T = boiling temperature at p) - h (p,θ = 22°C)). The enthalpies are in J/Kg and are read from a steam table. Unfortunately I don't know the initial pressure at 22°C so I leave this work to you.

m = ρ (12 bar, T) V with V = 0.73 * 140 m³ / hr = 0.027 m³/s - > Q