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Development of High Temperature Gas Turbine Matrix Microrecuperator Made of Laser Sintered Ceramic and Metal Structural Materials

[+] Author Affiliations
A. V. Sudarev, A. A. Suryaninov, B. V. Sudarev

Boyko Center, Ltd., St-Petersburg, Russia

V. G. Konakov

Research-Engineering Center «Glass & Ceramics», Ltd., St-Petersburg, Russia

Paper No. GT2012-68320, pp. 543-549; 7 pages
doi:10.1115/GT2012-68320
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4471-7
  • Copyright © 2012 by ASME

abstract

Analysis of trends in the development of small gas turbine engines (GTE) has shown that a significant increase in the parameters of the working media required to increase their efficiency and competitiveness in the energy market is limited by the reduced efficiency of small size blading of compressors and turbines [1].

Structural ceramic materials (SCMs), which has high heat resistance and relatively low density, allows development of light-weight and compact heat exchangers for regeneration of heat in the GTE’s which are suitable for continuous operation at the gas temperatures above 1000°C [2].

A design of the heat exchange surface for a countercurrent regenerative AH with a matrix consisting of coaxial cylindrical shells, each of which is made of heat elements (HE) in the form of circular perforated plates of equal width and different diameters, is proposed. The shells are embedded in one another and form a cylindrical matrix with longitudinal channels of circular (air) and semicircular (gas) cross sections.

The AH matrix in the area with the gas temperature over 650°C is made of SMC, while within a zone with lower temperature operation it is made of the heat-resistant alloy. The AH metal matrix model was tested with various coolants in model paths: “air-water”, “water-air” and “air-to-air.”

The experimental results confirmed the data of the thermal-engineering calculations. Such a sintered heat exchanger was designed for microGTE of 2 kW. At the present time it is being fabricated. Bench tests are scheduled for September-November 2012.

Copyright © 2012 by ASME

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