1) IGCC System Stability: “Coal Gasification Adjustment Testing”
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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・Stable shutdown when plant malfunctions. |
Test the interlocks to confirm safe plant shutdown. Test period: FY 2007 |
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Confirmed that system is stable.Objective accomplished |
・Safe handling of coal gas. |
Check and adjust plant operating status, and confirm that coal gas is handled safely and that operation is stable under rated load.
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2) Reliability of the facility: “2000-hours sustained operation”
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
---|---|---|---|
・Running continuously for 2000 hours (equivalent to 3 months of summer). |
Run continuously for 2000 hours.
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Achieved continuous-run target. Going forward, will also check durability over mid-to-long-term continuous operation.Objective accomplished |
3) Coal Type Acceptability: Change to Other Coal Type / Change to Out-of-Spec Coal Type
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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・Collecting data while running on coal types outside of the design specs. |
Check operation when using sub-bituminous coal (North American, Indonesian A).
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Analyzed operation when using three coal types outside the range of the design specs, collecting data to be used to support design of commercial-level facilities. In some cases, SGC heat-transfer piping downstream of the gasifier became clogged. Results made it clear that various countermeasures would be required to prevent problems caused by different coal types. Objective accomplished |
Check operation when using sub-bituminous coal (North American).
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Run plant with the purpose of enabling use of mainstream coal types beyond those covered by the design specs, and of sub-bituminous types capable of single-fuel firing.
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4) High Efficiency: “Operations Optimization Test”
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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Verify efficiency; investigate whether reasonable to anticipate efficiency enhancements sufficient for commercial use.
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By adjusting running parameters, able to confirm an LHV of 42.9% at the sending side, surpassing the goal of 42% LHV. | Confirmed high efficiency.Objective accomplished |
5) Durability : “Durability Confirmation Test”
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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Run for 5000 hours, then did overhaul inspection to evaluate durability.
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Confirmed that the tested equipment has an appropriate IGCC design. Going forward, will also check durability over mid-to-long-term continuous operation. Objective accomplished |
6) Economy: “Assessment of Cost-Effectiveness”
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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Used operational performance as a basis for comprehensive evaluation of costs (construction costs, operating costs, maintenance costs, etc.); and evaluated whether this approach would be economically feasible in a commercial environment.
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Based on the results, it seems quite possible that gasified coal may deliver power-generating costs equal to or lower than those for pulverized coal. But will need to enhance precision of these systems for lower repair costs.Objective accomplished |
1) Reliability
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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These studies as follow conducted. ・Durability assessment on the countermeasures against the troubles in the past. .
Test period: FY 2011 |
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・Countermeasures to initial stage troubles were basically effective in long-term perspective such as durability. ・Latest troubles were analyzed and effective countermeasures were established, which were inspected in the maintenance work afterward and no trouble was identified. Objective accomplished |
Confirm the mid-to-long term durability with further operation duration.
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2) Coal Type Flexibility
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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Other types of bituminous coal except for design coal, that is, Columbian, Russian and Indonesian coals are to be in use and operational data to be collected in 2011.
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・5 types of coal except for design coal was identified as applicable by the original and optimal adjustment in each coal type. ・Countermeasures newly developed in the design and its operation against clogging in SGC heat exchanger facility was identified as effective. Objective accomplished |
Another types of bituminous coal(USA) and sub-bituminous coal (Canada) were tested in 2012. Test period: FY 2012 |
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3) Economy
Verification Items (Overview) |
Demo Test | Results of Demonstration Testing |
Evaluation |
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Study on the cost reduction methods at commercial stage reflecting the operation and maintenance results in 2011. Test period: FY 2011 |
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・The design improvement In SGC was confirmed to be effective to reduce the SGC volume. ・Inspection period in each IGCC part was more precisely identified through the experience on the maintenance work, operation and facility troubles. Objective accomplished |
Cost reduction measures were further conducted, reflecting the operation and maintenance experiences in 2012. Test period: FY 2012 |
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