- Steam humidification-switch all water heaters to boil the water. When steam is produced, switch only 3 kW of heat to maintain the steam. Print the data and chart when the conditions are stable. Then, calculate the amount of steam introduced, the change in relative humidity, and the corresponding rise of temperature
Schematic diagram psychrometric chart
Steam Humidification
TAd = 30.2 TBd = 35
To value Ø, ω, extend the psychrometric chart to find the value
TAw = 26.4 TBw = 35
From Psychrometric Chart
ω1 = 20.5 x 10-3 ω2 = 36.85 x 10-3
Ø1= 25% Ø2= 93.4%
1) amount of steam = mv2 – mv1
= ( w2 • ma ) – (w1 • ma)
= ( 36.85 • 94.1) x 10-3 – ( 20.5 • 94.1) x 10-3
= 3.468 – 1.9291
= 1.539 kg
2) ∆ Ø = Ø2 – Ø1 = 93.4 – 75
= 18.4%
3) ∆Tdry = 35 – 30.2 = 4.8 oC
∆Twet = 35 – 26.4 = 8.6 oC
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