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29 August, 12:17

Consider a thermal energy reservoir at 1500 K that can supply heat at a rate of 150,000 kJ/h. Determine the exergy of this supplied energy, assuming an environmental temperature 25 ℃. (provide answer in kW)

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  1. 29 August, 14:20
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    33.4KW

    Explanation:

    Firstly, we calculate the power index in a reversible heat engine which is given as;

    n = 1 - T1/T2

    T1 = atmospheric temperature 298k

    T2 = reservoir temperature 1500k

    n = 1 - 298/1500

    n = 0.8013

    output energy = n * energy input

    0.8013*150000 = 120195KJ/hr

    Power output = 120195KJ/hr/3600 = 33.4KW
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