1. Structure and Structural calculation for Recuperative Heat Exchanger Recuperative Heat Exchanger Presented by -- Jinying Zhu

2. Material: stainless steel 304 Mechanical properties Allowable stress (MPa) : 206.84 Modulus of Elasticity (GPa) : 193.05 Poisson’s Ratio : 0.305

3. Structure parameters: Passage number: 200*200 Δp: 27atm The size of passages: 200μm*200μm Red: hot flow blue: cold flow

4. Structure: main heat exchange part connector (the next four pictures supplied by Ray)

9. Structural calculation result: (for main heat exchange part) Thickness(μm) max. stress (MPa) max. displacement(μm) 300 7.58 3.13*10 -3 400 6.95 2.96*10 -3 500 6.92 2.94*10 -3 600 6.28 2.91*10 -3 :by using the software Ideas 9 Strength in the main heat exchanger part is not a problem.

10. Connector: Connector: Material Mechanics: W (N/m) L b h

11. Connector: Material Mechanics: M =wL 2 /12 I =bh 3 /12 σ =Mc/I=PL 2 /(2h 2 ) We need to add some support in the connector for L has a large value comparing to h.

12. Connector supporting structure: L1L1 High press. flow Low press. flow thickness

13. Structural calculation result: (for connector) Thickness(μm) max. stress (MPa) max. displacement(μm) 300 190 2.80 400 179 2.50 500 170 2.41 600 162 2.38 :by using the software Ideas 9 The strength of connector is our focus in structural consideration.

14. Future work: Thermal-calculation Optimization of structure (thickness, stress and displacement)