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    Ee158 MIDTERMS Pplant 2nd15 16

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    Leeam Martin
    1. The document outlines an midterm examination for a power plant engineering course. It contains multiple choice, conversion, and problem solving questions. 2. The first problem involves calculating efficiency and costs for a coal power plant given its load, capacity, efficiencies, fuel costs, and a turbine power measurement. 3. The second problem involves calculating energy output, average load, daily load, and percentage savings based on diversity factor for a combined lighting and power load profile over 24 hours.

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    Ee158 MIDTERMS Pplant 2nd15 16

    Uploaded by

    Leeam Martin
    137 views1 page
    1. The document outlines an midterm examination for a power plant engineering course. It contains multiple choice, conversion, and problem solving questions. 2. The first problem involves calculating efficiency and costs for a coal power plant given its load, capacity, efficiencies, fuel costs, and a turbine power measurement. 3. The second problem involves calculating energy output, average load, daily load, and percentage savings based on diversity factor for a combined lighting and power load profile over 24 hours.

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    MID-TERM EXAM

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    1. The document outlines an midterm examination for a power plant engineering course. It contains multiple choice, conversion, and problem solving questions. 2. The first problem involves calculating efficiency and costs for a coal power plant given its load, capacity, efficiencies, fuel costs, and a turbine power measurement. 3. The second problem involves calculating energy output, average load, daily load, and percentage savings based on diversity factor for a combined lighting and power load profile over 24 hours.

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    137 views1 page

    Ee158 MIDTERMS Pplant 2nd15 16

    Uploaded by

    Leeam Martin
    1. The document outlines an midterm examination for a power plant engineering course. It contains multiple choice, conversion, and problem solving questions. 2. The first problem involves calculating efficiency and costs for a coal power plant given its load, capacity, efficiencies, fuel costs, and a turbine power measurement. 3. The second problem involves calculating energy output, average load, daily load, and percentage savings based on diversity factor for a combined lighting and power load profile over 24 hours.

    Copyright:

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

    MIDTERM EXAMINATION

    Subject: EE 158-POWER PLANT ENGINEERING Prepared by:


    Exam Date: August 7, 2015
    Time: 10:00 – 12:00 N.M. Engr. Marc-Eric E. Villanueva
    Room:313

    I. Modified True or False: Write True if the statement is correct and if the statement is
    False, Encircle the word/phrase that made the statement incorrect and place your correct
    answer on the answer sheet provided.

    1. Coal-Fired Steam Plant is a thermal plant which makes use of mined coal as fuel in producing
    electric energy.
    2. Gas Turbine Plant is a thermal plant wherein the prime mover is an engine and which makes
    use of combustible gas as a fuel in producing electric energy.
    3. Pumped Storage Plant is a hydroelectric generating station associated with a water storage
    reservoir.
    4. Regulating plant is a generating plant that can carry a minimal load over a period of time.
    5. Hot reserve is generating units on shutdown and not maintained at operating temperature but
    available for service.
    6. An electric generator uses mechanical power from the boiler and is converted into electrical
    power through this equipment.
    7. Penstocks prevent excessive pressure rises and drops during sudden load changes.
    8. Power House is used to enclose and support the hydraulic turbine, generator, pressure
    regulator (if used), and other auxiliaries.
    9. Wind Turbines require an average wind speed of not less than 15 kilometers per hour.
    10. Fission is the splitting of atoms into smaller pieces caused by electrons hitting each other.
    11. Under supply of electricity, 1 gram of uranium in nuclear plant is equivalent to 5 tons of coal
    used in coal-fired power plant.
    12. Bataan nuclear power plant uses boiling water reactor as its main design.
    13. Decomposition process is where the bacteria from a digester mixes from solid with liquid and
    produces gas that is used in a biogas power plant.
    14. Tail water reservoir is sometimes used to carry the water away from the draft tube or tailrace
    reservoir.
    15. Short period of usage and delivery is one of the main advantages of power barges during the
    energy crisis in our country.

    II. Conversion: convert the following


    1. BTU/Hr → dyne-cm/sec. 3. Joules → quad 5. Joules/Kg → BTU/lb
    2. Kcal/Kg → quad/lb. 4. KWHR → joules 6. KJ/Hr → Ft.-lb/sec

    III. Problem Solving:


    1. A coal fired thermal plant named MEV, has a maximum demand of 50MW and has a
    boiler, generator efficiencies of 85%& 95%, Its load and capacity factor is given to be 0.6
    and 0.5, the thermal plant consumes 1 slug per KWHR and the quality of coal used by
    this plant costs 5 USD per ton, for the moment 1USD= 43.20Php. What will be its overall
    turbine efficiency if the input power measurement in the turbine reads 34.7 MW?
    Calculate a.) Overall thermal efficiency of the plant b.) coal bill per annum in Philippine
    currency assuming bill will be charged based on the power output of the generator c.)
    The reserved capacity of the plant if it’s installed capacity = maximum demand +
    reserved capacity. Pin Po turbine
    Po boiler turbine Pin gen

    Pin Boiler
    boiler
    Turbine Generator Pout
    (85%) (95%)
    gen

    2. Combined Load of Lighting and Power


    Demand, 22 4 16 10 12 16 8 8 21 36 45 50 22
    kW 0 0 0 0 0 0 0 0 0 0 0 0 0
    Time, hr 12 2 4 6 8 10 1 2 4 6 8 10 10
    2
    Determine
    1. The daily energy output, 2. Average load of the combined load
    3. Daily load of the combined load, 4. If the installed capacity of the
    generating station is equal to the maximum demand and the load has
    diversity factor of 1.2, what is the % savings?

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