Inclined part of penstock of a hydropower dam is 100 m long.
This penstock has an inclination angle of 45° with the
horizontal (see the figure below). This is connected to the turbine
supplying water at 90 m^3/s. Inlet of penstock to the
water surface has a height of 30 m. Turbo-generator efficiency of
this hydro power plant system is 90%. Now answer the following
questions.
What type of hydro power plant is this? (i) Pumped storage (ii)
Runoff river (iii) Impoundment (iv) Recreation (v) Irrigation
What is the actual head of this plant? (i) 30 m (ii) 50 m (iii)
81 m (iv) 101 m (v) 121 m
In terms of size, what type of power plant is this? (i) Mini (ii)
Micro (iii) Pico (iv) None (v) All
What type of turbine do you have to use? (i) Pelton (ii) Francis
(iii) Turgo (iv) All (v) None
How will you categorize this dam? (i) High-head (ii)
Medium-head (iii) Low-head (iv) Average-head (v) No-head
Calculate the plant's capacity (nameplate power, MW)? (i) 52
(ii) 62 (iii) 72 (iv) 82 (v) 92
If the dam operates at 60% of its capacity on average, how much
energy (gigawatt hour, approx.) does it produce in a year?
(i) 131 (ii) 231 (iii) 331 (iv) 431 (v) 531
If each generator to be used has a rated capacity of 10 MW,
approximately how many generators do you need to install?
(i) 6 (ii) 9 (iii)
12 (iv) 15 (v) 20
How many people should this energy support, assuming average
community consumption of 3 megawatt hour per year per person?
Please explain answers.
25m
35m
Head
30m Reservoir DAM
Electric cable
Water flow
Transformer
XXX Power lines
Electric generator
Pressure tunnel Surge tank Penstock 100m
Water flow rotates shaft
Turbine
Inlet valve
-
Draft tube