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논문 기본 정보

자료유형
학술대회자료
저자정보
저널정보
대한설비공학회 대한설비공학회 학술발표대회논문집 대한설비공학회 1998년도 하계학술발표회 논문집(Ⅲ)
발행연도
1998.6
수록면
1,524 - 1,530 (7page)

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Triple effect absorption heat pumps are expected to deliver a high COP of about 1.5, that can not be achieved with double effect machines. One of main obstacles in developing a triple effect absorption machine with working fluid of LiBr/water is high temperature corrosion. Since the highest solution temperature in triple effect machine is expected to exceed 230℃, corrosion problems become serious. In this study the corrosion characteristics of carbon steel in LiBr/water solution were investigated at various test conditions. A long term test was carried out at 160℃ for 6000 hours and the change of mass of carbon steel samples were compared. It was found that a higher concentration of corrosion inhibitor(Li₂MoO₄) had the effect of preventing corrosion. It was also found that a low surface-to-solution volume ratio is advantageous in preventing corrosion. In the following series of experiments three different carbon steel samples with different surface treatments were tested for 250 hours, at 95℃ 160℃ and 230℃, respectively. In addition to mass change of the steel samples, the Fe and Mo-concentration in the solution were measured with ICP-AES and Mo-fraction at the sample surface were measured with AES. Fe-concentration was turned out to be higher in the solution which had been placed in higher temperature condition. The surface Mo-concentration at 95℃ was much lower than that at 160℃ or 230℃. Although some results have been obtained in this study, a lot of researches are still necessary to clear many unsolved questions on corrosion characteristics of carbon steel in LiBr/water solution.

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Abstract

1. 서론

2. 실험 장치 및 방법

3. 실험 결과

4. 결론

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