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Chapter 4- Conclusions and future directions 4.1- Conclusions A main inefficiency of RFBs with IFF design is their non-uniform flow distribution. Moreover, a major inquiry while scaling up RFBs is electrolytes pump capacity, an energy sink for the system. Flow field designs influence both flow distribution and pump power consumption rate. Investigating their effect on the afore-mentioned issues is the first step to improve their design. The present study focuses on the hydrodynamic aspects of flow fields and provides a model to examine the pressure distribution in RFBs. The important parameters effective on the pressure drop in RFB systems is identified, and six corresponding dimensionless numbers are extracted. These dimensionless numbers are integral to designing, controlling, and comparing RFB systems. A model, abbreviated as HEAM, is developed by implementing scaling analysis to predict the pressure drop and pressure distribution for any flow field design. The accuracy of HEAM is compared to other analytical and CFD models available in the literature. HEAM has proven to be accurate in predicting pressure drop for RFBs with SFF design and inconsistent in doing the same for RFBs with IFF design. However, it is more accurate than other analytical models, and its accuracy is comparable to computationally-costly CFD models. Therefore, it is more reliable than its competitive models for further analysis. HEAM predicts the non-uniformity of the flow distribution in channels of IFF design. Moreover, it suggests multiple solutions to relax the non-uniformity. These modifications were supported by the literature. The best suggestion is to design wider manifolds, which improves flow distribution and reduces overall pressure drop. Additionally, it predicts that RFBs with IFF cause lower pressure drop than the ones with SFF design. This result is in favor of IFFs, giving them an 68PDF Image | Analysis of Fluid Flow in Redox Flow Batteries
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