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3차원 연소장 내의 스털링엔진 열교환기 설계를 위한 수치해석 연구
강석훈(Seok Hun Kang),정대헌(Dae Hun Chung),김혁주(Hyuck Joo Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Numerical analysis is conducted to design the high temperature heat exchanger of Stirling engine by using the commercial CFD solver, FLUENT. The fin-tube type of heat exchanger is designed, considering the type of engine which is ft-configuration. To find the optimal design of heat exchanger numerical calculation is conducted by changing the shape and material of fin, shape in three-dimensional combustion field. As a combustion model Methan-air-2step is used. And radiative heat transfer is also analyzed by using the discrete ordinates model. Adjusted one-way constant velocity is used as the representative velocity of oscillating flow. The optimal design of heat exchanger considering the heat transfer capability is suggested by using the calculation results.
강석훈(Seok Hun Kang),정대헌(Dae Hun Chung) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
The Organic Rankine Cycle (ORC) that generates electric power by using low temperature heat source is developed and experimental study is conducted. The radial turbine and high speed DC generator are designed and developed in this study also. As a working fluid R245fa is adopted, considering operation condition of cycle and environmental friendly characteristic. Experiments to analyze the operation characteristics for the designed ORC are conducted. The maximum cycle, turbine efficiencies and power output are shown to be 5.22%, 78.7% and 32.8㎾ respectively. The factors that influence on the efficiency of the ORC are analyzed and discussed.
핀-튜브 형태의 스털링엔진 고온 열교환기 설계를 위한 수치해석 연구
강석훈(Seok Hun Kang),정대헌(Dae Hun Chung),김혁주(Hyuck Joo Kim) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
Numerical analysis is conducted to design the high temperature heat exchanger of Stirling engine by using the commercial CFD solver FLUENT. The fin-tube type of heat exchanger is designed, considering the type of engine which is β configuration. To find the optimum design of heat exchanger numerical calculation is conducted by changing the shape, number and material of fin, shape of working fluid channel, etc in three-dimensional combustion field. Adjusted one-way constant velocity is used as the representative velocity of oscillating flow. The optimum design of heat exchanger considering the heat transfer capability is suggested by using the calculation results.
3차원 연소장에서의 핀-튜브 형태의 스털링엔진 고온 열교환기 설계를 위한 수치해석 연구
강석훈(Seok Hun Kang),김혁주(Hyuck Joo Kim),정대헌(Dae Hun Chung) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.11
Numerical study is conducted to design the high temperature heat exchanger of Stirling engine by using the commerical CFD solver, FLUENT. The Fin-tube type of heat exchanger is designed as a reference model, considering the type of engine which is β-configuration. To find the optimal design of heat exchanger numerical calculation is conducted by changing the shape, number and material of fin in three-dimensional combustion field. Adjusted one-way constant velocity is considered as the representative velocity of oscillating flow. The optimal design of heat exchanger considering the heat transfer capability will be suggested by using the calculation results.