thermodynamics steady flow system receive 5kg/min of fluid where P1=138 kPa, V1=0.042 m3/kg V1=122m/s and u1=18.2 KJ/kg. The fluid leaves the system at a boudary where P2=550.6 kPa, V2=0.193 m3/kg, V2= 183 m/s and u2= 52.8 KJ/kg. During passage through the system the fluid receives 3000 J/s of heat. Determine the work (KJ/min)

A centrifugal pump has the following characteristics as shown in Table 1. Table 1: Pump characteristics Q(m3 /s) 0.033 0.029 0.027 0.0235 0.020 0.017 0.0133 H(m) 40 60 66 75 80 84 90 Efficiency % 20 45 55 68 75 66 45 The pump is used to pump water from a low reservoir to a high reservoir through a total length of 1100 m of pipe 250 mm in diameter. The difference between the water levels in the reservoirs is 25 m. Neglecting all losses except friction and assuming λ=0.042, calculate: i. The discharge and head at the duty point for the pump. (20) ii. The efficiency at the duty point. (5) [2