本研究成功利用Comsol Multiphysics模擬軟體建立了高溫型質子交換膜燃料電池的單條三維流道模型，並研究擋板長度及空氣流速對電池泵功損失、質傳特性與性能的影響。結果顯示，增加擋板長度可以提高質傳效率和性能表現，安裝在流道中的擋板可以增加局部氣體流速，促進反應氣體的運輸。擋板可增加多孔電極中的反應氣體濃度，如此可降低濃度過電位並增強燃料電池性能，而燃料電池的功率隨著阻塞率增加而上升，在BR70%和BR90%等流道部分堵塞的條件下，低空氣流速時因增加擋板長度使流阻提高，造成流道中後段水氣堵塞及陰極質傳阻抗上升，也因使讓電池的性能下降。
當流道被完全阻擋時 (BR100%)，愈長的擋板長度可以獲得的電流密度越高，在空氣流速1.0 ms-1及擋板長度2.0mm的條件下，電池雖有最佳的電流密度1.17 A cm-2，但增長擋板長度同時也導致了流道進出口壓差的增加，在BR100%、擋板長度2.0 mm及空氣流速1.0 ms-1的條件下，因壓損所造成的泵功損失百分比達15%。因此在計算淨功率密度後，本研究發現最佳電池淨功率密度的參數反而是BR70%與擋板長0.1mm的流道以及1.0 ms-1的空氣流速。
In this research, a single-channel three-dimensional model of a high-temperature proton exchanging membrane fuel cell was successfully developed vis Comsol Multiphysics software. This research investigated the effects of air velocity and block length on the pumping power loss, mass transfer characteristics and performance of the fuel cell. The results show that increasing the block length improves the mass transfer efficiency and cell performance. The block installed in the flow channel increases the local gas velocity and promotes the transportation of the reactive gas. The blocks increases the concentration of reactive gas in the porous electrode, which decreases the concentration overpotential and therefore enhances the cell performance. Moreover, the output power of the fuel cell increases as the blocking ratio (BR) increases. Under the BR70% and 90% of partial blocking, as the air velocity is low, increasing the block length increases the flow resistance, causing a obstruction of water vapor in the rear section of the flow channel and an increase in the cathodic mass transport resistance, and therefore leads to a decrease in the cell performance.
When flow channel is fully blocked (BR100%), the longer the block length is, the higher the cell current density is. With the air velocity of 1.0 ms-1, the block length of 2.0 mm, the fuel cell has the best current density of 1.17 A cm-2 among all operating and channel parameters. However, increasing the block length results in a greater pressure difference between the channel inlet and outlet, causing an additional pumping power loss ratio of 15% for this flow channel. Therefore, after considering the pumping loss and calculating the net power output, the best net power output are obtained under the conditions of the blocking ratio of 70%, the block length of 0.1 mm and the air velocity being 1.0 ms-1 .
