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Reference- flow field- electrode C SSFF- SGL 4.6 carbon felt 6 3SFF- SGL 4.6 carbon felt 12 3SFF- Carbon paper 32 [43]- IFF- Carbon paper 32 [43]- SSFF- Carbon paper 6 [38]- IFF-1.59w- Carbon paper 0 [38]- IFF-0.79w- Carbon paper 7 [38]- IFF-0.25w- Carbon paper 32 Additionally, it is important to evaluate whether the HEAM is more accurate than its competitive analytical models in the literature or not. As Figure 3. 17-14 suggest, the HEAM is more accurate than MacDonald’s and Aziz’s analytical model. Additionally, as Figure 3. 16-16 suggest, it predicts that the pressure drop decreases as the cross-sectional area of channels becomes larger, which the other two models predict the opposite. Equation 3.35 shows how MacDonald’s model falsely predicts that the pressure drop increases with the cross-sectional area of channels for RFBs with IFF design. The same is shown for Aziz’s model in Equation 3.36. 𝛽 → 0 ⇒ { ⇒ (1 + ) → 1 + → 𝛽2 ⇒ ∆𝑃 𝐼𝐹𝐹 → ∆𝑃 ( ) (3.35) cosh𝛽→1 sinh𝛽 → 𝛽 2+2cosh𝛽 𝛽sinh𝛽 4 >1 4 𝛽2 4 𝛽2 4 𝑃𝐹𝐹 𝛽2 { 𝑐𝑝 𝑤𝜇𝑄 𝐴 𝑐 𝑝 = 32𝜇𝑣𝑝𝐿𝑐 ∆𝑃 𝑃𝐹𝐹 128𝐿2𝐾h 𝐼𝐹𝐹 𝛽2= 𝑐 𝑝 𝑤 𝑤 h 𝑑2 𝑟𝑐𝑐h 𝜓𝑑2 h ⇒∆𝑃 → 𝑟 𝑐 𝑐 𝑝 = 𝑟 𝑐 𝑤𝑤h𝜇𝑣 𝜓𝐿h 𝐾 𝜓𝐿2h 2𝐾𝑁 50PDF Image | Analysis of Fluid Flow in Redox Flow Batteries
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