Tham khảo tài liệu 'fuel cell micro turbine combined cycle_3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http . INLET DUCT 16 TOTAL CONCEPTB Figure 8 Concept B Plan View 18 Simpo PDF Merge and Split Unregistered Version - http POWER-TURBINE DISCHARGE . INLET CONCEPTB Figure 9 Concept B Elevation View 19 Simpo PDF Merge and Split Unregistered Version - http Manifold Systems The manifold systems comprise large horizontal-running ducts from the engine and vertical ducts at each stack of fuel-cell modules. Ducts have been sized to limit flow velocity to 60 fps feet per second consistent with the pressure-loss specifications cited earlier and in an effort to promote uniform flow distribution. Three inches of insulation will limit outer-wall temperatures below 240 F. Manifolds would be constructed from light-gauge superalloy sleeves wrapped with insulation and surrounded by heavier-gauge low-grade Stainless Steel. The .035-inch1 thick inner sleeves are segmented allowing relative sliding to accommodate thermal growth. This choice of wall thickness is based on a 10 000-hr life target based on a .010-inch margin. This construction minimizes the weight of expensive materials and avoids use of metal bellows. The strong outer casing also makes for a straightforward approach to supporting heavy piping although for clarity the structural framework has been omitted from the figures. Single-Recuperator Approach This is the preferred option as discussed earlier provided that the advanced material PM2000 can be successfully utilized. Strength oxidation resistance and thermal conductivity are ample at 1740oF based on published data. The material is currently available from Plansee in the appropriate gauge thicknesses. Successful manufacture of a PM2000 recuperator requires that it be brazable and that it be amenable to intricate forming in our fin-folding process. Current experience with the manufacture of honeycomb turbine seals proves brazeability and tentatively indicates that .
