Question #105415
feedwater enters a boiler drum at a pressure of 4826 kPa abs, 148.9°C and a specific volume of 0.00109 m^3/kg. steam leaves the superheater of the boiler at 4137 kPa abs, 287.8°C and a specific volume of 0.0546 m^3/kg. calculate: a. the flow work in kj/kg associated with the water entering the boiler drum, and b. the flow work in kj/kg associated with the steam leaving the superheater
1
Expert's answer
2020-04-06T12:06:57-0400

Flow work of fluid as it exits or enters the system


w=pvw=pv


where pp - pressure, vv - specific volume;


wenter=48260000.00109=w_{enter}=4826000\cdot0.00109= 5.265.26 kJ/kgkJ/kg


wexit=41370000.0546=225.88w_{exit}=4137000\cdot0.0546=225.88 kJ/kgkJ/kg




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