Explain SCADA system and list the various instrument used for measurement of humidity. Explain working of wet bulb and dry bulb thermometer used for measurement of relative humidity.

Dry air inlet temperature 23.9 (t1) Wet air inlet temperature 20.5 (t2) Dry air outlet temperature 24.3 (13) Wet air outlet temperature 23.1 (14) Inlet (A) Outlet (B) Set 2 Set 1 T [°C] Inlet (A) Outlet (B) (b) By using the psychrometric chart, fill up the table below for mass balance. Set 1 v[m/kg dry w[kg/kg dry air] Inlet (A) Outlet (B) 0.0183 0.017 [kg/kg dry air] 61 Set 2 T [°C] 68 24.2 20.8 25.4 24.5 aur] 0.86 v[m³/kg dry air m (c) By using the psychrometric chart, fill up the table below for energy balance. het [kJ/kg dry air] het [kJ/kg dry air [kg dry air/s] 0.0586 m [kg dry air/s] 6

2. The absolute humidity at atmospheric pressure at 40 ° C is 0.011 kg air / kg dry air. Specify:    A. Air vapor partial pressure. = AnswerkPa.    b. Relative humidity = Answer%    c. Dew point temperature. = Answer (° C)

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