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Homework Help: Gas fired cogeneration power plant

  1. Oct 25, 2009 #1
    1. The problem statement, all variables and given/known data

    A small gas-fired power plant which operates between temperatures of 900 K and 300 K
    generates 30 MW of electrical power. Some of the waste heat from the generation process is used to heat water for space heating.
    The Carnot Efficiency for this plant is 66.7%

    2. Relevant equations

    Question 1. If the actual efficiency is 50% find the amount of heat which must be supplied to the power plant?

    Question 2. Calculate the amount of heat exhausted to the cold reservoir.

    3. The attempt at a solution

    For both questions, I am not sure which variables to use and if I need to take into account - do I need to include the carnot efficiency in the calculations?
    Last edited: Oct 25, 2009
  2. jcsd
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