A sample of wet steam is passed through a simple throttling calorimeter. The steam entry pressure recorded on a gauge is 9 bar. Immediately after throttling, the temperature is 110 °C, where the steam is at atmospheric pressure of 1 bar. Calculate the dryness fraction of the steam sample.
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Expert's answer
2018-08-16T10:16:08-0400
After throttling h2 = 2697.6 kJ/kg Before throttling h1 = hf + xhfg = 763 + x2015 (from the tables https://www.simetric.co.uk/si_steam.htm) h1 = h2 We get 763 kJ/kg + x2015 kJ/kg = 2697.6 kJ/kg x = 0.9495
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