- Problem 1 8 Points For A Hydraulic Power Generation Sites Select An Appropriate Turbine Type And Calculate Its Diame 1 (184.06 KiB) Viewed 10 times
selection of turbine and 10.10 for the diameter of the turbine. And
please answer part A and part B
Problem 1. (8 points) For a hydraulic power generation sites, select an appropriate turbine type and calculate its diameter for the following operating conditions: (a) the available net head is 92 m and the water flow rate is 5.1 m/s with 380 rpm and (b) the available net head is 150 m and the water flow rate is 69 m/s with 850 rpm.
Pelton turbinesa) Pump turbines (6) Francis turbines (c) Empirical data can be used to estimate the impeller diameter A = K,D(3H)0.25/90.5 o = KonQC.5/(3H)0.75 Ko = 70.5/20.75 1.054 Kaplan turbines () Bulb turbines (e) - <0.001 (Nondimensional specific diameter) = 0.005 20.01 Ko = 70.5 20.25 = 2.11 -0.02 n is in rpm The other parameters can be in either Sl or Eng. unit 30.04 -0.06 -0.08 01 - 0.2 P0.4 0.6 -O0.8 4:04 -1.5 22- 802 906 2 = 1.5 2 3 4 S 10 N, in rpm(m/s)05/(m075) gH/(kun-D2) 0 = Q/(konD3) Ky = 72/2 Ko = 7214 05 0.02 0.05 0.1 0.2 0.3 0.4 0.5 0.6 0.8 1 (Nondimensional specific speed) 1 20 40 60 80 100 150 200 300 400 500 600 Ns (Dimensional specific speed in SI system) Figure 10.10 Relationship between specific diameter and specific speed of hydraulic turbines. (Reprinted by permission from Schweiger, F. & Gregor, J., "Developments in the Design of Water Turbines," Int. Water Power & Dam Construction, May 1989, Reed Business Publishing Ltd., Sutton, Surrey, UK.)
Table 10.1 Range of Specific Speed Turbine Type Specific Speed N. (rpm(m/s)0.5/m0.751 Pelton Pump Francis Kaplan Bulb 1-20 (with one jet) 25-120 20-140 100-300 150-400