외부 수증기 연계 SOEC 시스템의 공급 스팀 온도 및 열교환기 유용도에 따른 시스템 BOP 및 운전 특성 분석

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 31; no. 6; pp. 596 - 604
• Main Authors: 김영상(YOUNG SANG KIM), 이영덕(YOUNG DUK LEE), 안국영(KOOK YOUNG AHN), 이동근(DONG KEUN LEE), 이상민(SANG MIN LEE), 최은정(EUN JUNG CHOI)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2020
• Subjects: 기계공학; SOEC(고체산화물연료전지); BOP(주변장치); Steam(수증기); Effectiveness(유용도); Electrolysis(수전해)
• ISSN: 1738-7264; 2288-7407

Solid oxide electrolysis cell (SOEC) attracts much attention because of its high energy efficiency among many water-electrolysis technologies. SOEC operates at temperatures above 700℃, so that the water required for water-electrolysis must be supplied in the form of steam. When the steam to be supplied to the SOEC is generated by the SOEC system itself, an enormous amount of latent heat is required to vaporize the water, so additional energy must be supplied to the SOEC system. On the other hand, if the steam can be supplied from the outside, a small amount of energy is required to raise the temperature of the low temperature steam, so that the SOEC system can be operated without additional energy supply from outside, which enables efficient water-electrolysis. In this study, we figure out the size of heat exchanger for various steam temperature and effectiveness of heat exchanger, and propose the energy efficiency of the system.