Design and analysis of microturbine compressor

  • Are most microturbine units designed for with higher electric efficiencies?

    Most microturbines are using high-speed permanent magnet generators to produce alternative electricity.
    The heat from fuel combustion in turbines is used for energy optimization.
    Electrical efficiency of the microturbine is 20%–30% and the power range is from 25 to 500 kW [2]..

  • What is the difference between a gas turbine and a microturbine?

    Other than the size difference, microturbines differ from larger combustion turbines in that they typically have lower compression ratios and operate at lower combustion temperatures.
    In order to increase efficiency, micro- turbines recover a portion of the exhaust heat in a heat exchanger called a recuperator..

  • What is the efficiency of a microturbine compressor?

    Microturbine systems are capable of producing power at around 25-33 percent efficiency by employing a recuperator that transfers exhaust heat back into the incoming air stream.
    Efficiencies generally decrease at elevated ambient temperatures..

  • What is the thermal efficiency of a microturbine?

    Microturbines have around 15% efficiencies without a recuperator, 20 to 30% with one and they can reach 85% combined thermal-electrical efficiency in cogeneration..

  • As indicated, the overall CHP efficiency for the five representative microturbines ranges from 64% (System #3) to slightly under 72% (System #1).
    The power to heat ratio ranges from 0.53 (System #1) to 0.77 (System #5).
  • Microturbines.
    Microturbines are relatively small combustion turbines that can use gaseous or liquid fuels.
    While large gas turbines (described in a separate fact sheet1) have been used for CHP applications for several decades, microturbines emerged as a CHP option in the 1990s.
  • Most microturbines are using high-speed permanent magnet generators to produce alternative electricity.
    The heat from fuel combustion in turbines is used for energy optimization.
    Electrical efficiency of the microturbine is 20%–30% and the power range is from 25 to 500 kW [2].
A structural design was conducted on a compressor for a microturbine generating 100 kW output power. The scope concerned the conceptual design of gas 

How to optimize a compressor & turbine?

In traditional optimization method, the isentropic efficiencies of compressor and turbine are usually set as a constant value

The variation ranges of key parameters are given, the optimal value of the optimization design parameters can be found within the given ranges

What is a structural design of a microturbine?

A structural design was conducted on a compressor for a microturbine generating 100 kW output power

The scope concerned the conceptual design of gas turbine system, the sizing of the compressor, the computation of loads acting on compressor and the stress analysis for its structural integrity

What type of compressor does a microturbine use?

Microturbines use a radial compressor stage that generally has the specific speed range of 0

7 to 1 0 of Mach number

The compressor is designed for subsonic flow to avoid choking problems

Stage polytrophic efficiencies of 87 to 89% could be achieved for certain types of compressors in this specific speed range


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