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김경수(Kyoung Su Kim),방세경(Se Kyoung Bang),정은익(Eun Ik Jeong),이중섭(Chung Seob Yi) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.4
This study is collects design data through the process design of the organic Rankine cycle, which can produce 20kW of electric power through the recovery of waste heat. In this study, the simulation was conducted by using APSEN HYSYS in order to make the model for the process design of the 20kW class waste heat recovery system. For the thermodynamic model, the test was conducted with hot water as the heat source, with the water steam used as the cooling water for the cooler and the refrigerant R245fa in the cycle. In Case 1 and Case 2, it was expected and found that the cycle efficiency was 10.6% and that 36.86kw was produced, considering the margin of 84% of 20kW. In Case 3 and Case 4, it was expected and found from the simulation that the cycle efficiency was 12% and that 30.0kw was produced, considering the margin of 84% of 20kW.
김경수(Kyoung Su Kim),방세경(Se Kyoung Bang),서인호(In Ho Seo),이상윤(Sang Yun Lee),정은익(Eun Ik Jeong),이중섭(Chung Seob Yi) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.5
This study aims to gain the design data through the process design of the organic Rankine cycle, which can produce 250kW of electric power through waste heat recovery. In this study, a simulation was conducted using APSEN HYSYS to make the model for the process design of the 250kW-class waste heat recovery system. For the thermodynamic model, the test was conducted with hot water as the heat source, the water steam as the cooling water for the cooler, and the refrigerant R245FA in the cycle. In the final design, it was expected and found from the simulation that the cycle efficiency was 12.62% and that 250kW of power was produced considering the margin of 80%.
250kW급 폐열회수 시스템용 유기랭킨사이클 배관 열유동해석에 관한 연구
김경수(Kyoung Su Kim),방세경(Se Kyoung Bang),서인호(In Ho Seo),이상윤(Sang Yun Lee),이중섭(Chung Seob Yi) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.4
This study is a thermal and flow analysis of Organic Rankine Cycle (ORC) pipe line for 250 kW grade waste gas heat recovery. We attempted to obtain the boundary condition data through the process design of the ORC, which can produce an electric power of 250 kW through the recovery of waste heat. Then, we conducted a simulation by using STAR-CCM+ to verify the model for the pipe line stream of the 250 kW class waste heat recovery system. Based on the results of the thermal and flow analyses of each pipe line applied to the ORC system, we gained the following conclusion. The pressure was relatively increased at the pipe outside the refracted part due to the pipe shape. Moreover, the heat transfer amount of the refrigerant gas line is relatively higher than that of the liquid line.