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23 December, 21:26

Hydrogen enters the turbine of an Ericsson cycle at 1040 K, 5 bar with a mass flow rate of 1 kg/s. At the inlet to the compressor the condition is 300 K and 1.5 bar. Assuming the ideal gas model and ignoring kinetic and potential energy effects, determine: a. the net power developed, in KW.

b. the thermal efficiency.

c. the back work ratio.

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Answers (1)
  1. 23 December, 23:10
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    a)

    Calculate the net power developed by using

    the following relation:

    Wste=W-W.

    Substitute 8728 kw for w, and 2846 kw for w ...

    Wyle=8728 - 2846

    = 5882 kW

    Therefore, the net power developed is 5882 kW).

    Comment

    Step 6 of 7 A

    Calculate the thermal efficiency by using the

    following relation:

    Here, e, is the heat input.

    Substitute w, for ...

    w

    Substitute s882 kw for ws and 8728 kw for w.

    5882

    1-8728

    67.39%

    Therefore, the thermal efficiency is 67.39%).

    Comments (3)

    Step 7 of 7 A

    Calculate the back work ratio.

    bwr =

    Substitute 8728 kw for w, and 2846 kw for w ...

    bwr - 2846

    bwr=8728

    =0.326

    Therefore, the back work ratio is 10.326).
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