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

Water flows in a horizontal pipe of d₁=100 mm with a velocity w_t=1m/s and pressure p₁=90 kPa. It enters a pipe reduction to a diameter d₂=50 mm. Pressure after the pipe reduction drops to p₂=80 kPa while temperature is unchanged. Find entropy generation rate in the zone of the pipe reduction. Assume that the surroundings is at T_s=20?C and pressure is p_s=80kPa and the steady state is considered. What will be the exit pressure after the pipe reduction if the process was reversible? Water density is ?=1000kg/m^3. Specific enthalpy and entropy of the water can be calculated from formulae: h=h_ref+cT[K]+?(?-?_ref), where c=4.19 KJ/(kgK).

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samet mamat answered 2 years ago

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