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NTIS 바로가기大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, v.40 no.9 = no.372, 2016년, pp.557 - 567
주천준 (울산대학교 기계공학부) , 웬반합 (울산대학교 기계공학부) , 이근식 (울산대학교 기계공학부)
In this study, the optimal design of heat exchangers, including the evaporator and condenser of a solar-heating ocean thermal energy conversion (SH-OTEC), is investigated. The power output of the SH-OTEC is assumed to be 100 kW, and the SH-OTEC uses the working fluid of R134a and high-performance co...
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
OTEC가 상용화되지 못한 이유는 무엇인가 | 이런 맥락에서 해양온도차발전은 매력적이며 연간 생산 가능한 전력은 약 7TW로 평가되고 있다. 그럼에도 불구하고 OTEC 이 상용화되지 못하고 있는 큰 이유는 이 열기관의 효율이 1~2%로 너무 낮고 심층냉수를 끌어오는 문제가 쉽지 않기 때문이다. (1,2) | |
열교환기 최적설계에 유전자 알고리즘을 적용함으로써 어떠한 효과를 얻었는가 | 최근 유전자 알고리즘(genetic algorithm, GA)이 열교환기 최적설계에 효과적인 접근방법으로 알려졌다. (11~14) 면적과 관련한 설비비와 펌핑과 관련된 운전비를 포함한 총비용을 최소화하는데 GA알고리즘을 사용함으로써 50% 이상의 비용절감의 효과가 있었다고 알려졌다. (15) Ghost(16)는 최적의 적층패턴을 찾기 위하여 다중 흐름 평판-핀 열교환기를 조사하였다. | |
해양온도차발전란 무엇인가 | 해양온도차발전(OTEC)은 20-30oC의 표면해수와 3~10oC의 심층해수 사이에서 발생하는 온도차를 이용하여 전력을 생산하는 재생에너지의 일종이다. 화석연료의 연소과정에서 생성되는 배출가스는 지구온난화의 주범이며, 화석연료 또한 고갈되어가고 있는 실정이다. |
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