Optimization of SOFC stack gas distribution structure based on BP Neural network and CFD

The flow field distribution of solid oxide fuel cells significantly affects the performance of the stack. The flow uniformity can be improved and the power generation efficiency can be improved by optimizing the gas distribution structure of the stack. Based on the simplified 6kW stack model, the stack gas distribution structure with two-stage buffer cavity was designed, and the stack model was numerically simulated by ANSYS Fluent software. The BP neural network model, which can predict the uniformity of the outlet of the integrated stack, is established successfully. The parameters of the gas distribution structure are analyzed and optimized by using the orthogonal test and BP neural network. The results show that at the same time considering pile distribution structure under the condition of surface area and uniformity, when the first stage inlet buffer chamber depth is 40 mm, the channel width is 40 mm, the secondary inlet buffer chamber depth is 80 mm, can effectively reduce the electric pile distribution structure, surface area, to reduce heat loss, at the same time guarantee the integrated electric reactor outlet flow uniformity of more than 96%, greatly improves the efficiency of power generation.

On-Demand Nanozyme Signal Enhancement at the Push of a Button for the Improved Detection of SARS-CoV-2 Nucleocapsid Protein in Serum

We developed an innovative 3D printed casing that incorporates a lateral-flow immunoassay, dehydrated signal enhancement reagents, and a sealed buffer chamber. With only the push of a button for signal...

Field Experiment of Top-Heat Thermosyphon

Three types of thermosyphon were tested. Type-1 has a horizontal condenser with a 536ml volume buffer chamber. The vertical heat transfer height was 3m. In type-2, condenser and connecting pipe were tilted by 10° to the ground with 3776ml buffer chamber. In type-3, only condenser was tilted and the others were the same as type-2. In type-2 and -3, the vertical heat transfer height was 4 m. The maximum coefficient of the heat transfer was 60% for type-1 and 40% for type-2 and -3. Detailed difference in performance of type-1, -2, and -3 were not elucidated because of the limited field data. However, the present results indicated the promising capability of thermosyphon without using circulation pumps. Optimizing the performance of the thermosyphon was left for the future study.