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  • Micro-turbines usually refers to units of less than 350 kW. These units are usually powered by either diesel fuel or natural gas.
  • They utilize technology already developed. The micro-turbines can be either axial-flow or centrifugalradial
  • inflow units. The initial cost, efficiency, and emissions will be the three most important criteria in the design of these units.
  • The micro-turbines, to be successful, must be compact in size, have low manufacturing cost, high efficiencies, quiet operation, quick startups, and minimal emissions. These characteristics, if achieved, would make micro-turbines excellent candidates for providing base-load and cogeneration power to a range of commercial customers.
  • The micro-turbines are largely going to be a collection of technologies that have already been developed. The challenges are in economically packaging these technologies.
  • The micro-turbines on the market today range from about 20–350 kW.
  • Today’s micro-turbine uses radial-flow turbines and compressors.
  • To improve the overall thermal efficiency regenerators are used in the micro-turbine design, and in combination with absorption coolers, or other thermal loads very high efficiencies can be obtained. Figure 1-16 shows a typical
  • cogeneration system package using a micro-turbine. This compact form of distributed power systems has great potential in the years to come.

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