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이창민(Chang Min Lee),임정열(Jeong Yeol Lim),윤린(Rin Yun) 대한설비공학회 2015 설비공학 논문집 Vol.27 No.4
The MVR was theoretically modeled by performing the polytropic process, and the polytropic coefficient was estimated by using the performance curve provided by the manufacturers. The TVR was investigated by applying the conservation equations to the movement of fluids inside the TVR. The size of the nozzle and diffuser was determined. Theoretical MVR and TVR modeling was verified by comparing the results of the model with the available design data. Besides, the effects of multi-staging of the MVR on power consumption, and the effects of suction and primary pressure on the sizing of TVR were investigated.
차수원(Cha Soo-Won),장봉석(Jang Bong-Seok),임정열(Lim Jeong-Yeol) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.9 No.2
Using the finite element code, DIANA performs 2-D transient temperature and resultant stress analysis for roller compacted concrete dam. Time variability of the mesh geometry is considered in order to simulate successive phases of the structure"s construction. The purpose of the present study is to investigate the influence of seasonal temperature variation on the thermal stresses in RCD structures. The main analysis variables are concrete temperature and ambient temperature. The results show principal tensile stress of hot-weathering concrete is higher than that of cold-weathering concrete.
차수원 ( Cha Soo-won ),장봉석 ( Jang Bong-seok ),임정열 ( Lim Jeong-yeol ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
Using the finite element code, DIANA performs 2-D transient temperature and resultant stress analysis for roller compacted concrete dam. Time variability of the mesh geometry is considered in order to simulate successive phases of the structure's construction. The purpose of the present study is to investigate the influence of seasonal temperature variation on the thermal stresses in RCD structures. The main analysis variables are concrete temperature and ambient temperature. The results show principal tensile stress of hot-weathering concrete is higher than that of cold-weathering concrete.