Hydro Tasmania has initiated the Battery of the Nation (BotN) strategic initiative to investigate and map out future development opportunities for the State of Tasmania to make a bigger contribution to a future National Electricity Market (NEM). The Tarraleah scheme redevelopment pre-feasibility study was undertaken through this initiative, with funding support from ARENA under the Advancing Renewables Program. For this assignment problem you will be using your knowledge of hydro power to: (1) estimate extended specifications for a new power station on the left bank of the Nive River opposite the existing power station; and (2) to reverse engineer specifications for the Pelton turbines currently installed at the Tarraleah power station. The pre-feasibility design team established basic parameters of a new power station to comprise two Francis turbines with a design flow of 20 m³/s (total 40 m³/s), a net head of 305 m and an installed capacity of 57 MW (total 113 MW). The Tarraleah power station comprises of six 15 MW nameplate Pelton wheel turbines which produce a total power output of 93.6 MW. The static head at the site is 290 m and the total volumetric flow rate through the six turbines is 42 m³/s. Assuming that the six turbines are identical and have four jets each. For the new power station in the Nive River, (a) determine the efficiency of the Francis turbine which was assumed in the pre-feasibility assessment; (b) use an engineering design tool to estimate the rotational speed of the Francis turbine in rpm; (c) critique the rotational speed you have estimated in (b) with specific reference to the assumptions which you have made; and (d) identify if other types of hydro turbines could be suitable for the net head at the Nive River site. For the existing Tarraleah power station, (e) identify an appropriate turbine efficiency to use and justify this assumption; (f) determine the head loss upstream of the turbine; (g) assume a bucket turning angle and calculate the bucket efficiency relative to the ideal case; (h) calculate the diameter and velocity of the jets; and (i) calculate the average radius of the Pelton wheels.
Hydro Tasmania has initiated the Battery of the Nation (BotN) strategic initiative to investigate and map out future development opportunities for the State of Tasmania to make a bigger contribution to a future National Electricity Market (NEM). The Tarraleah scheme redevelopment pre-feasibility study was undertaken through this initiative, with funding support from ARENA under the Advancing Renewables Program. For this assignment problem you will be using your knowledge of hydro power to: (1) estimate extended specifications for a new power station on the left bank of the Nive River opposite the existing power station; and (2) to reverse engineer specifications for the Pelton turbines currently installed at the Tarraleah power station. The pre-feasibility design team established basic parameters of a new power station to comprise two Francis turbines with a design flow of 20 m³/s (total 40 m³/s), a net head of 305 m and an installed capacity of 57 MW (total 113 MW). The Tarraleah power station comprises of six 15 MW nameplate Pelton wheel turbines which produce a total power output of 93.6 MW. The static head at the site is 290 m and the total volumetric flow rate through the six turbines is 42 m³/s. Assuming that the six turbines are identical and have four jets each. For the new power station in the Nive River, (a) determine the efficiency of the Francis turbine which was assumed in the pre-feasibility assessment; (b) use an engineering design tool to estimate the rotational speed of the Francis turbine in rpm; (c) critique the rotational speed you have estimated in (b) with specific reference to the assumptions which you have made; and (d) identify if other types of hydro turbines could be suitable for the net head at the Nive River site. For the existing Tarraleah power station, (e) identify an appropriate turbine efficiency to use and justify this assumption; (f) determine the head loss upstream of the turbine; (g) assume a bucket turning angle and calculate the bucket efficiency relative to the ideal case; (h) calculate the diameter and velocity of the jets; and (i) calculate the average radius of the Pelton wheels.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Hydro Tasmania has initiated the Battery of the Nation (BotN) strategic initiative to investigate and
map out future development opportunities for the State of Tasmania to make a bigger contribution
to a future National Electricity Market (NEM). The Tarraleah scheme redevelopment pre-feasibility
study was undertaken through this initiative, with funding support from ARENA under the
Advancing Renewables Program.
For this assignment problem you will be using your knowledge of hydro power to: (1) estimate
extended specifications for a new power station on the left bank of the Nive River opposite the existing
power station; and (2) to reverse engineer specifications for the Pelton turbines currently installed at
the Tarraleah power station.
The pre-feasibility design team established basic parameters of a new power station to comprise two
Francis turbines with a design flow of 20 m³/s (total 40 m³/s), a net head of 305 m and an installed
capacity of ~57 MW (total 113 MW).
The Tarraleah power station comprises of six 15 MW nameplate Pelton wheel turbines which produce
a total power output of 93.6 MW. The static head at the site is 290 m and the total volumetric flow
rate through the six turbines is 42 m³/s. Assuming that the six turbines are identical and have four
jets each.
For the new power station in the Nive River,
(a) determine the efficiency of the Francis turbine which was assumed in the pre-feasibility
assessment;
(b) use an engineering design tool to estimate the rotational speed of the Francis turbine in rpm;
(c) critique the rotational speed you have estimated in (b) with specific reference to the assumptions
which you have made; and
(d) identify if other types of hydro turbines could be suitable for the net head at the Nive River site.
For the existing Tarraleah power station,
(e) identify an appropriate turbine efficiency to use and justify this assumption;
(f) determine the head loss upstream of the turbine;
(g) assume a bucket turning angle and calculate the bucket efficiency relative to the ideal case;
(h) calculate the diameter and velocity of the jets; and
(i) calculate the average radius of the Pelton wheels.
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