500℃ 터빈 입구 조건의 수백 kWe급 초임계 이산화탄소 발전시스템 테스트루프 개발 연구

다국어 초록 (Multilingual Abstract)

KIER has developed a hundreds of kWe-class supercritical carbon dioxide power cycle (SCO₂) test loop for distributed heat sources such as biomass and waste heat recovery. A 120 kWe dual Brayton cycle which consists of two turbines, a compressor, two recuperators, a flue-gas heater and a cooler was developed and optimized. The turbine and compressor inlet conditions are 500℃/130bar and 35℃ /77bar, respectively. The low temperature turbo-generator was already manufactured and tested in 2017 successfully, it was developed as an axial impulse type turbine with a carbon-ring type mechanical seal and oil-lubricated tilting-pad bearings. A centrifugal type of compressor with a dry gas seal (DGS) and oil-lubricated tilting-pad bearings was developed. To reduce leakage flow, the DGS and its flow control system were manufactured. A LNG-fired flue gas heater which consists of a burner and shell-and-tube type heat exchanger was manufactured. A temperature of 650℃ flue gas was generated to heat carbon dioxide up to 500℃ at 130bar condition. Two PCHE type recuperators and one PCHE type cooler were manufactured. A piping stress analysis was conducted and a high temperature expansion joint was used at the flue-gas heater to mitigate thermal expansion. A full test loop would be constructed and operated in next year.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 사이클 설계 및 개발 전략
• 3. 압축기
• 4. 열원, 복열기 및 쿨러
• 5. 배관 시스템
• 6. 결론
• 참고문헌