Fuel Cell FEM & Optimization

Presentation on theme: "Fuel Cell FEM & Optimization"— Presentation transcript:

1 Fuel Cell FEM & Optimization
학번 : 이름: 한경태

2 Thermal-Structural Analysis Optimization (Modal Analysis)
-Contents- Summary Model & Property Thermal-Structural Analysis Optimization (Modal Analysis)

3 Summary

4 1. Summary -PEMFC 모델에 대한 열-구조 연성해석 수행
-동적특성을 고려하여 Optimization Tool 을 이용한 최적설계 수행 -최적설계 결과에 대한 검증

5 Model & Property

6 2. Model & Property • 기하모델 구성 및 재료
Reference: INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENT. Volume7, Issue1, 2016 pp.1-22

7 2. Model & Property • 2D Element Model

8 2. Model & Property • Finite Element Model Node number 38,109
Element number 36,066

9 Thermal-Structural Analysis

10 3. Thermal-Structural Analysis
• Concept

11 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 ℃

12 3. Thermal-Structural Analysis
• Boundary & Load condition Displacement: Fixed UX Direction Displacement: Fixed UY Direction

13 3. Thermal-Structural Analysis
• Result - Temperature

14 3. Thermal-Structural Analysis
• Result - Flux

15 3. Thermal-Structural Analysis
• Result – Deformation & Stress

16 Optimization (Modal Analysis)

17 4. Optimization • Concept

18 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

19 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 ≤ [mm] 5 ≤ X2 ≤ 20 -Design Parameter- Cell number (X2) Dimension (X1)

20 4. Optimization • Response Surface Model -2nd Oder Polynomial-
-Kriging-

21 4. Optimization • Result - Response Surface -2nd Oder Polynomial-
-Kriging-

22 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] 830.93 777.27 Result Difference [%] (Opt/FEM) 7.33 1.05

23 4. Optimization • Result - Optimization 14 Cell Initial 15 Cell

24 4. Optimization • Result - Optimization 14 Cell Initial 15 Cell

25 Thank You