团聚物参数对质子交换膜燃料电池内部传热影响

质子交换膜燃料电池阴极催化层中的团聚物内电解质体积分数和团聚物半径会影响氧气的传输阻力，从而影响电化学反应速率，进而影响电池内的热量产生和传递。然而，团聚物内电解质体积分数和团聚物半径对燃料电池内传热的具体影响规律尚不明确。因此，本文建立了二维、两相、非等温质子交换膜燃料电池团聚物模型，探究团聚物内电解质体积分数和团聚物半径对电池内温度分布和产热量的影响。结果表明，团聚物内电解质体积分数的增加和团聚物半径的减小使得氧气的传输阻力减小，从而有利于电性能的提高，并使得膜电极组件各部分的产热量增加，以及阴极催化层内的氧还原反应产热量、欧姆产热量和气液相变产热量均增加，但不利于温度分布的均匀性。

EFFECTS OF AGGLOMERATE PARAMETERS ON HEAT TRANSFER IN A PROTON EXCHANGE MEMBRANE FUEL CELL

The electrolyte volume fraction in agglomerate and the agglomerate radius in the cathode catalyst layer of a proton exchange membrane fuel cell affect the oxygen transport resistance, which affects the electrochemical reaction rate, as well as the heat generation and transfer in the fuel cell. However, the effects of electrolyte volume fraction and agglomerate radius on heat transfer in a fuel cell are not clear. Therefore, in this paper, a two-dimensional, two-phase, non-isothermal proton exchange membrane fuel cell agglomerate model is established to investigate the effects of electrolyte volume fraction and agglomerate radius on temperature distribution and heat production in a fuel cell. Results show that the increase of electrolyte volume fraction and the decrease of agglomerate radius are beneficial to the decrease of the oxygen transport resistance, the improvement of cell performance, the increase of the heat production of each part of the membrane electrode assembly, and the increase of the heat production of oxygen reduction reaction, ohmic heat production and the heat production of phase change of water in the cathode catalyst layer, while they are not conducive to the uniform distribution of temperature.