成果報告書詳細
管理番号20140000000184
タイトル*平成25年度中間年報 固体酸化物形燃料電池を用いた事業用発電システム要素技術開発 固体酸化物形燃料電池を用いた事業用発電システム要素技術開発
公開日2015/11/27
報告書年度2013 - 2013
委託先名三菱日立パワーシステムズ株式会社(旧三菱重工業株式会社 旧株式会社日立製作所)
プロジェクト番号P12002
部署名新エネルギー部
和文要約
英文要約Annual Report 2013FY “R&D for large scale power generation plant of SOFC ”
Abstract
A SOFC could be operated at high temperature. Realization of thermal power plant with extremely high-efficiency of up to 70%-LHV can be expected by applying the exhaust heat of SOFC to gas turbine (GT) combined-cycle power generation. We call triple combined cycle system the plant, because it is composed of three power equipment of SOFC and GT and steam turbine (ST). In the triple combined cycle system, SOFC is installed upstream of the GTCC. Chemical energy of fossil fuel is converted to DC electricity directly in SOFC, then the exhaust fuel of SOFC is converted into electric power by burning in the GT. In this way, since this system can be used to cascade without leaving the energy possessed by fossil fuels, the efficiency is extremely high.

1. Development of SOFC cell stack and cartridge
(1) Production, inspection of SOFC cell stack and cartridge
MHPS is developing a SOFC module to increase the power density per unit volume.
(2) Cost reduction and Mass production technology for SOFC cell stack
The compatibility of the low cost materials for anode and cathode to the standard materials is tested. The power generation tests with cell-stacks consisting of low cost materials are performed. The I-V performance is comparable to the case observed for using the standard cell-stacks. The reliability of the materials is to be evaluated by confirming the reproducibility of the power generation tests.
The compatibility of the slurries made by the subcontractors to the standard slurries is shown by the power generation tests.
(3) Generation test of SOFC cell stack
MHPS and MHI perform the generation test under the testing scheme reflecting the practical operating conditions by the Tohoku Electric Power Co., Inc.
The power generation tests with the pressurized fuel and air show the increase of the cell voltage and the effectiveness of applying pressurized gases to decrease the system size and costs.
Also the affordability of reformed fuels including methane and water vapor is confirmed by the power generation test using such fuels.
(4) Generation test of SOFC cartridge
MHPS examined the generation of cartridge in 1.0MPaG. The performance in 1.0MPaG confirmed 5% of improvement in comparison with performance of 0.3MPaG (MGT operating pressure).
To enhance reducing the system cost, the power generation tests using cell-stacks without reforming catalyst are performed. The I-V performance is comparable to the case observed for using the standard cell-stacks.

2. Development of the SOFC and GT combined technology
(1) SOFC ‐ GT combined simulation test
MHPS is examining the test equipment which could simulate combination of SOFC and GT.
(2) Development of the GT and gas turbine combustor
In the fiscal year of 2013, combustion analysis was enforced based on 2012’s BFG element test. The combustion characteristic of element test burner with low calorie fuel was analyzed by combustion analysis to verify the validity.
From the element test and the combustion analysis, single-can full scale prototype combustor was developed for combustion test which used a test fuel, adjusted to reflect the same calorific value to the SOFC off-gas, as the fuel gas. As a consequence of the test results, combustion efficiency is high as the element test at base load condition while the combustion stability is favorable.
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