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help me in thermodynamic please

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    الصورة الرمزية enggkhalid
    enggkhalid
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    تاريخ التسجيل: Feb 2009
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    help me in thermodynamic please

    i need a soluation for these quations:

    10–25 A binary geothermal power plant uses geothermal
    water at 160°C as the heat source. The cycle operates on the
    simple Rankine cycle with isobutane as the working fluid.
    Heat is transferred to the cycle by a heat exchanger in which
    geothermal liquid water enters at 160°C at a rate of 555.9 kg/s
    and leaves at 90°C. Isobutane enters the turbine at 3.25 MPa
    and 147°C at a rate of 305.6 kg/s, and leaves at 79.5°C and410 kPa. Isobutane is condensed in an air-cooled condenser
    and pumped to the heat exchanger pressure. Assuming the
    pump to have an isentropic efficiency of 90 percent, determine
    (a) the isentropic efficiency of the turbine, (b) the net power
    output of the plant, and (c) the thermal efficiency of the cycle.






    10–26 The schematic of a single-flash geothermal power
    plant with state numbers is given in Fig. P10–26. Geothermal
    resource exists as saturated liquid at 230°C. The geothermal
    liquid is withdrawn from the production well at a rate of 230
    kg/s, and is flashed to a pressure of 500 kPa by an essentially
    isenthalpic flashing process where the resulting vapor is separated
    from the liquid in a separator and directed to the turbine.
    The steam leaves the turbine at 10 kPa with a moisture
    ******* of 10 percent and enters the condenser where it is
    condensed and routed to a reinjection well along with the liquid
    coming off the separator. Determine (a) the mass flow
    rate of steam through the turbine, (b) the isentropic efficiency
    of the turbine, (c) the power output of the turbine, and (d) the
    thermal efficiency of the plant (the ratio of the turbine work
    output to the energy of the geothermal fluid relative to standard
    ambient conditions). Answers: (a) 38.2 kg/s, (b) 0.686,
    (c) 15.4 MW, (d) 7.6 percent

    من مواضيع enggkhalid :


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  2. [2]
    hassankyo2007
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    الصورة الرمزية hassankyo2007


    تاريخ التسجيل: Jun 2007
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    search in thermodynamic books and those quations are easy

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    ((يرفع الله الذين امنوا منكم والذين اوتوا العلم درجات))

  
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