Development and Evaluation of Ceramic Components for 8000-kW Class Hybrid Gas Turbine

Abstract

An 8000 kW class hybrid gas turbine (HGT) project, administered by the New Energy and Industrial Technology Development Organization (NEDO) and sponsored by the Ministry of International Trade and Industry (MITI), has been started in July 1999 in Japan[1]. The target of this project is improvement in thermal efficiency and output power by using ceramic components, and earlier commercialization of the gas turbine system. Ceramic components are used for stationary parts subjected to high temperature, such as combustor liners, transition ducts, and first stage turbine nozzles. The gas turbine development was conducted in cooperation with Kawasaki Heavy Industries, Ltd. (KHI). Kyocera started a study on fabricating the ceramic HGT components after evaluating their shape, placement, and fabrication methods. For these ceramic components, we are using the SN282 silicon nitride material developed and used for ceramic gas turbine components in the previous ceramic gas turbine project (300kW CGT)[2-4]. We have started to accumulate the strength evaluation data, using test bars cut from the aforementioned components, and begun long term tensile creep testing to confirm the reliability of the ceramic components.

Development and Evaluation of Ceramic Components for a Gas Turbine

“…The recession of silicon-based ceramics [7][8][9][10][11][12][13][14] was focused on during this project. The significant recession of silicon nitride material SN282 manufactured by Kyocera was confirmed by exposure tests in this project [4,5]. A thin Yb 2 Si 2 O 7 EBC was developed to suppress the recession under combustion gas [5,15].…”

“…The 300kW-CGT project was completed in 1999 with excellent success [1]. After this project "Research and development on practical industrial cogeneration technology" project called HGT project was started in 1999 and completed in March 2004 [2][3][4][5][6]. The targets of this project were improvement in thermal efficiency and output power by using ceramic components, and early commercialization of the gas turbine system.…”

Small recuperated ceramic microturbine demonstrator concept

“…Two recently published books give very comprehensive accounts of ceramic engine design and test experience [8] and component development and characterization [9]. Additional valuable data on materials and ceramic component development can be gleaned from recent papers [10][11][12][13][14][15]. We would be remiss if we did not mention the significant accomplishments made in the small ceramic gas turbine field with details of the engines highlighted on Table 1, and briefly discussed as follows.…”

Development of Silicon Nitride Components for Gas Turbine

“…8000kW-HGT project. The 8000kW-HGT project [2,[15][16][17][18] has been administered by New Energy and Industrial Technology Development Organization (NEDO). This project has been completed in March 2004.…”