In this experiment, the expander is connected to an electrical generator, which is then connected toan electrical load (light bulbs, etc.).a. The thermodynamic‐to‐mechanical efficiency may not be directly calculated, since the torqueon the generator shaft is not measured. If a torque sensor was available, how would youcalculate the mechanical work, and through it, the mechanical efficiency?b. What are some typical thermodynamic‐to‐mechanical efficiencies for moderately large(greater than 1 MW) steam turbine/AC generator pairings in industry?(2) The liquid exiting the system pump is a compressed (or subcooled) liquid. If your team only knew thepump’s exit temperature (and not the pressure), how would you estimate the enthalpy of this stream?
In this experiment, the expander is connected to an electrical generator, which is then connected to
an electrical load (light bulbs, etc.).
a. The thermodynamic‐to‐mechanical efficiency may not be directly calculated, since the torque
on the generator shaft is not measured. If a torque sensor was available, how would you
calculate the mechanical work, and through it, the mechanical efficiency?
b. What are some typical thermodynamic‐to‐mechanical efficiencies for moderately large
(greater than 1 MW) steam turbine/AC generator pairings in industry?
(2) The liquid exiting the system pump is a compressed (or subcooled) liquid. If your team only knew the
pump’s exit temperature (and not the pressure), how would you estimate the enthalpy of this stream?
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