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    Exercise Problems

    Uploaded by

    ian heniel
    This document contains 7 questions related to calculating energy output, capacity, and other metrics for various hypothetical hydroelectric power generation scenarios. Key details include reservoir capacities, water heads, river flows, plant efficiencies, load factors, and more. Calculations require determining metrics like total energy available, firm capacity, average power output, rating of generators needed, and changes in reservoir levels based on power supplied over time.

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    Download as DOCX, PDF, TXT or read online from Scribd

    Exercise Problems

    Uploaded by

    ian heniel
    115 views1 page
    This document contains 7 questions related to calculating energy output, capacity, and other metrics for various hypothetical hydroelectric power generation scenarios. Key details include reservoir capacities, water heads, river flows, plant efficiencies, load factors, and more. Calculations require determining metrics like total energy available, firm capacity, average power output, rating of generators needed, and changes in reservoir levels based on power supplied over time.

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    This document contains 7 questions related to calculating energy output, capacity, and other metrics for various hypothetical hydroelectric power generation scenarios. Key details include reservoir capacities, water heads, river flows, plant efficiencies, load factors, and more. Calculations require determining metrics like total energy available, firm capacity, average power output, rating of generators needed, and changes in reservoir levels based on power supplied over time.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    115 views1 page

    Exercise Problems

    Uploaded by

    ian heniel
    This document contains 7 questions related to calculating energy output, capacity, and other metrics for various hypothetical hydroelectric power generation scenarios. Key details include reservoir capacities, water heads, river flows, plant efficiencies, load factors, and more. Calculations require determining metrics like total energy available, firm capacity, average power output, rating of generators needed, and changes in reservoir levels based on power supplied over time.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 1

    1.

    A hydroelectric generating station is supplied from a reservoir of capacity 5*10 6 cubic meters at
    a head of 200 meters. Find the total energy available in kWh if the overall efficiency is 75%.
    2. It has been estimated that a minimum run off of approximately 94 m 3/sec will be available at a
    hydraulic project with a head of 39 meters. Determine (a) firm capacity (b) yearly gross output.
    Assume the efficiency of the plant is 80%.
    3. Calculate the average power in kW that can be generated in a hydro-electric project from the
    following data:
    Catchment area = 5 * 109 m2 ; mean head, H = 30 m
    Annual rainfall, F = 1.25 mts ; Yield factor, K = 80 %
    Overall efficiency = 70%
    If the load factor is 40%, what is the rating of generators installed?
    4. A hydro-electric power station has a reservoir area of 2.4 square kilometers and capacity 5 * 10 6
    m3. The effective head of water is 100 meters. The penstock, turb ine and generator efficiencies
    are respectively 95%, 90% and 85%.
    Calculate the total electrical energy that can be generated from the power station. If a
    load of 15,000 kW has been supplied for 3 hours, find the fall in reservoir level.
    5. A factory is located near a water fall where usable head for power generation is 25 m. the
    factory requires continuous power of 400 kW throughout the year. The river flow in a year is (a)
    10 m3/sec for four months, (b) 6 m3/sec for 2 months and (c) 1.5 m3/sec for 6 months.
     If the site is developed as a run-of-river plant, without storage, determine the standby
    capacity to be provided. Assume the overall efficiency of the plant is 80%.
     If a reservoir is arranged upstream, will any standby unit be necessary? What will be the
    excess power available?
    6. A run-of-river plant with pondage has the following data:
    Installed capacity = 10 MW ; water head, H = 20 m
    Overall efficiency = 80% ; load factor = 40%
    (a) Determine the river discharge in m3/sec required from the plant.
    (b) If on a particular day, the river flow is 20 m 3/sec, what load factor can the plant supply?
    7. The weekly discharge of a typical hydro-electric plant is as under:
    Day Sun Mon Tue Wed Thu Fri Sat
    Discharge 500 520 850 800 875 900 546

    The plant has an effective head of 15 mts and an overall efficiency of 85%. If the plant
    operates on 40% load factor, estimate,
    (a) The average daily discharge
    (b) Pondage required
    (c) Installed capacity of proposed plant

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