Question

I sheet is provided). Non-communicating calclators allowed areas. You may use the back of the page if necessary e and student number are written on the question sheet. Answer questions in allocated *You have 6% bonus marks Sha STUDENT NAME: 9, urpdsf 1rusas DENT NO. 11] 130 Points] A centrifugal pump is being designed to pump liquid refrigeran R 34 t m temperature and atmospheric pressure. The impeller inlet and outlet radi are y-100 and -180mm respectively. The impeller inlet and outlet widths are by-50 and b-30mm. The pump is to deliver 025 m3/s of the liquid at a net head of 14.5 m when the impeller rotates at 2000 rpm. Predict the hornepowe required by the pump and design the blade shape, i... following conditions Assume blades to be forward-curved. specifically, calculate angesp, andhforthe ai (angle of the fluid velocity at inlet) -45°. For refrigerant R-134a at T-20°C; y= 0.0008157 m3/kg, p=lhy-1226 kg

Answer 1