Fuel Cell FEM & Optimization 학번 :201493111 이름: 한경태
Thermal-Structural Analysis Optimization (Modal Analysis) -Contents- Summary Model & Property Thermal-Structural Analysis Optimization (Modal Analysis)
Summary
1. Summary -PEMFC 모델에 대한 열-구조 연성해석 수행 -동적특성을 고려하여 Optimization Tool 을 이용한 최적설계 수행 -최적설계 결과에 대한 검증
Model & Property
2. Model & Property • 기하모델 구성 및 재료 Reference: INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENT. Volume7, Issue1, 2016 pp.1-22
2. Model & Property • 2D Element Model
2. Model & Property • Finite Element Model Node number 38,109 Element number 36,066
Thermal-Structural Analysis
3. Thermal-Structural Analysis • Concept
3. Thermal-Structural Analysis • Boundary & Load condition -Anode 부 낮은 온도의 유제 -Cathode 부 열 발생 -외부 대기 조건 Convection Coefficient: 50e-3W/mm2 ℃ Temperature: 40 ℃ Convection Coefficient: 5e-3W/mm2 ℃ Temperature: 25 ℃ Convection Coefficient: 250e-3W/mm2 ℃ Temperature: 100 ℃
3. Thermal-Structural Analysis • Boundary & Load condition Displacement: Fixed UX Direction Displacement: Fixed UY Direction
3. Thermal-Structural Analysis • Result - Temperature
3. Thermal-Structural Analysis • Result - Flux
3. Thermal-Structural Analysis • Result – Deformation & Stress
Optimization (Modal Analysis)
4. Optimization • Concept
4. Optimization • 1st Mode of Initial model -연료전지가 750 Hz 로 구동되는 기기에 설치될 경우 -공진 회피 -전력량을 늘리기 위해 Stack 의 Cell 수를 최대한 늘리는 것을 목적으로 함
4. Optimization • Parameter Study Goal Constraints -Design Parameter- Find xi, i=1, 2 To Minimize X1 To Maximize X2 Constraints Subject to 1st Natural Frequency > 750 [Hz] 65 ≤ X1 ≤ 80 [mm] 5 ≤ X2 ≤ 20 -Design Parameter- Cell number (X2) Dimension (X1)
4. Optimization • Response Surface Model -2nd Oder Polynomial- -Kriging-
4. Optimization • Result - Response Surface -2nd Oder Polynomial- -Kriging-
Result Difference [%] (Opt/FEM) 4. Optimization • Result - Optimization Solution Initial Kriging 2nd Oder Polynomials x1 [mm] 80.00 67.303 65.323 x2 [mm] 5 13.972 14.851 Frequency-(Opt) [Hz] - 774.15 769.14 Frequency-(FEM) [Hz] 1904.17 830.93 777.27 Result Difference [%] (Opt/FEM) 7.33 1.05
4. Optimization • Result - Optimization 14 Cell Initial 15 Cell
4. Optimization • Result - Optimization 14 Cell Initial 15 Cell
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