Structural responses of deep sea water upwelling riser according to connecting shapes

Abstract

Deep sea water has been used for energy efficiency such as cooling, heating, and OTEC and water quality improvement and nutrient provision in fish farm, etc. The efficiency is dependent on several factors such as upwelling mechanism and systematic strategy. For upwelling large amount fo deep water, it is necessary to develp a large diameter riser and accordingly, the connecting methodology is important. This study presents five different connecting shaps, show the structural responses through a flow-structural coupled analysis, and discusses the characteriscis. For the purpose, first, we carried out flow analysis using computation fluid dynamics and an associated software package - ANSYS-CFX. Second, consider the pressure field obatained around the target risers structural analyses were performed to obtain the reponses-steress and displacements. Finally, the characteristics of each connector are discussed.tematic strategy. For upwelling large amount fo deep water, it is necessary to develp a large diameter riser and accordingly, the connecting methodology is important. This study presents five different connecting shaps, show the structural responses through a flow-structural coupled analysis, and discusses the characteriscis. For the purpose, first, we carried out flow analysis using computation fluid dynamics and an associated software package - ANSYS-CFX. Second, consider the pressure field obatained around the target risers structural analyses were performed to obtain the reponses-steress and displacements. Finally, the characteristics of each connector are discussed.