• 박물관보존과학
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• 제23권
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• pp.61-70
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• 2020

금성산 고분군에 위치한 의성 대리리 2·3호분의 발굴조사 과정에서 마구류 주변으로 형태와 용도를 추정하기 어려운 회백색의 유기물이 확인되는 바, 회백색 유기물에 대한 실체현미경 분석을 실시하였다. 그 결과, 회백색의 유기물은 백화된 쌀겨 부식물임을 확인하였다. 마구류, 특히 안장의 아래에서 전면적으로 깔려 출토된 정황과 분석 결과를 근거로 용도를 추정해 본 결과, 안장 아래에 놓여서 말등과의 마찰을 줄이는 안장깔개의 충진재로 쌀겨가 사용되었음을 유추해 볼 수 있다. 충전재인 쌀겨를 제외한 상호관계의 유기물이 남아있지 않아 정확한 형태와 구조는 확인할 수 없으나 본 연구를 통해 쌀겨가 마구류와 함께 출토된 사례가 다양하게 보고된다면 쌀겨의 정확한 용도에 대해 면밀히 검토해 볼 수 있는 계기가 될 것으로 기대한다.

• 대한조선학회논문집
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• 제60권3호
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• pp.186-192
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• 2023

According to the regulation on the pollution of the marine environment, SOx emission from ships has to be reduced. A SOx scrubbing system installed in a funnel of a ship is considered in order to reduce SOx emission. A scrubbing layer with a porous material is present in the funnel to increase the contact area between exhaust gas and water. In this study, experiments on the pressure drop characteristics in the scrubbing layer are conducted to investigate the effect of the scrubber on the engine load. The pressure drop according to flow rate of air instead of exhaust gas was measured for fillers such as sphere, pall ring and saddle in the scrubbing layer. First of all, porosity is experimentally measured for the three types of filler and it is confirmed that the porosity of the saddle-type filler was the largest. The pressure drop according to the change in air flow rate was measured for the three types of fillers in the scrubbing layer. As a result, the pressure drop was the smallest in the scrubbing layer with the saddle-type filler which has the largest porosity. In addition, the effect of spraying water flowing counter flow against air flow is experimentally examined. It is known that the pressure drop is increased because the air flow space is reduced when water is sprayed. In the case of the saddle, the pressure drop is about 1.5 to 2 times greater than that when only air flows at the optimum exhaust gas-water injection ratio.