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Effect of the thermal insulation on generator and micro gas turbine system

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  • Park, Jun Su
  • Park, Sehjin
  • Kim, Kyung Min
  • Choi, Beom Seok
  • Cho, Hyung Hee

Abstract

The efficiency of micro gas turbine generator is affected significantly by the temperature level in the micro gas turbine system. If the operation temperature of generator and compressor increases, the efficiency of generator and compressor decreases, greatly. This study investigates the heat transfer and temperature distribution in a micro gas turbine system. In addition, the temperature levels on the substrates are controlled using the different thermal insulation materials. The thermal conductivity of insulation is changed from 0.1 to 100 to evaluate the effect of the thermal conductivity on generator and micro gas turbine. A conjugate heat transfer method has been used for this purpose. We conducted a CFD analysis in the compressor and turbine flow domains using CFX v.12 to obtain the boundary conditions for conduction calculation. The conduction analysis, using ANSYS v.12, was calculated on the solid part domain. The conduction heat transfer calculation considered the heat generation induced by the Joule heating in the generator. The results show that the most heat flux from the turbine and generator is removed by the inlet flow induced by the compressor. The conductivity of thermal insulation material has a little effect on the temperature distributions of the generator.

Suggested Citation

  • Park, Jun Su & Park, Sehjin & Kim, Kyung Min & Choi, Beom Seok & Cho, Hyung Hee, 2013. "Effect of the thermal insulation on generator and micro gas turbine system," Energy, Elsevier, vol. 59(C), pages 581-589.
    • Handle: RePEc:eee:energy:v:59:y:2013:i:c:p:581-589
    DOI: 10.1016/j.energy.2013.07.019
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    References listed on IDEAS

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    1. Hwang, Sang Dong & Kwon, Hyun Goo & Cho, Hyung Hee, 2010. "Local heat transfer and thermal performance on periodically dimple-protrusion patterned walls for compact heat exchangers," Energy, Elsevier, vol. 35(12), pages 5357-5364.
    2. Kim, Kyung Min & Jeon, Yun Heung & Yun, Namgeon & Lee, Dong Hyun & Cho, Hyung Hee, 2011. "Thermo-mechanical life prediction for material lifetime improvement of an internal cooling system in a combustion liner," Energy, Elsevier, vol. 36(2), pages 942-949.
    3. Kim, Kyung Min & Kim, Beom Seok & Lee, Dong Hyun & Moon, Hokyu & Cho, Hyung Hee, 2010. "Optimal design of transverse ribs in tubes for thermal performance enhancement," Energy, Elsevier, vol. 35(6), pages 2400-2406.
    4. Lee, Dong Hyun & Rhee, Dong-Ho & Kim, Kyung Min & Cho, Hyung Hee & Moon, Hee Koo, 2009. "Detailed measurement of heat/mass transfer with continuous and multiple V-shaped ribs in rectangular channel," Energy, Elsevier, vol. 34(11), pages 1770-1778.
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    2. Chung, Heeyoon & Sohn, Ho-Seong & Park, Jun Su & Kim, Kyung Min & Cho, Hyung Hee, 2017. "Thermo-structural analysis of cracks on gas turbine vane segment having multiple airfoils," Energy, Elsevier, vol. 118(C), pages 1275-1285.
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