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  3. water flows in a horizontal pipe of d1=100 mm with

Water flows in a horizontal pipe of d1=100 mm with a velocity wt=1m/s and pressure p1=90...

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Mechanical Engineering

Water flows in a horizontal pipe of d1=100 mm with avelocity wt=1m/s and pressure p1=90 kPa. Itenters a pipe reduction to a diameter d2=50 mm. Pressureafter the pipe reduction drops to p2=80 kPa whiletemperature is unchanged. Find entropy generation rate in the zoneof the pipe reduction. Assume that the surroundings is atTs=20?C and pressure is ps=80kPa and thesteady state is considered. What will be the exit pressure afterthe pipe reduction if the process was reversible? Water density is?=1000kg/m^3. Specific enthalpy and entropy of the water can becalculated from formulae:h=href+cT[K]+?(?-?ref), where c=4.19KJ/(kgK).

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