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27 August, 10:41

During a simple cooling process, atmospheric air with humidity ratio of 4.5 g vapor / kg dry air is cooled from 30 celcius to 20 celcius. what is the wet bulb temperature (celcius) of the cooled atmospheric air?

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  1. 27 August, 11:14
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    Answer: the wet bulb temp is approximately 13.15°c

    Explanation: humidity ratio H varies directly with temperature (the hotter the air the more the moisture that vapourises into water vapour increasing the humidity ratio and vice versa)

    H1T1 = H2T2

    T is the temperatures (dry bulb)

    H2 = (4.45 * 30) / 20 = 6.675 g/kg

    We now have two properties of the second state (temp already given as 20°c) we check psychometric chart for the wet bulb temperature of that state which gives us approximately 13.15°c
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