光合生物制氢反应器能量传递过程数值分析

Numerical analysis of energy transfer process in photosynthetic biological hydrogen production reactor

中文关键词: 光合生物制氢  反应器  数值模拟  传热传质  熵产率

英文关键词: photosynthetic biological hydrogen production  reactor  Numerical simulation  heat and mass transfer  entropy production rate

中文摘要:

      为了研究折流板式光合生物制氢反应器(Anaerobic Baffled Reactor ,ABR)运行过程中传热传质过程的机理，将Monod生物动力学模型与生物制氢底物消耗动力学相结合，使用数值模拟研究不同条件下反应器内葡萄糖消耗过程中传热、传质和化学反应引起的熵产率，在此基础上分析光合细菌对葡萄糖的消耗速率和产氢速率，以单位氢气生成速率的熵产率最小作为评价原则对反应器的运行条件进行优化。结果表明，各因素对折流板式光合生物氢反应器性能的影响的主次顺序为：光照强度＞溶液温度＞壁面温度＞底物初始浓度＞水力滞留期。最佳运行条件为:培养液温度为30 ℃，反应器壁面温度为30 ℃，光照强度为6000 lx，反应器水力滞留期(HRT)为12 h，培养液葡萄糖浓度为150 mol·m-3。

英文摘要:

      In order to investigate the mechanism of heat and mass transfer during the operation of the folded plate photosynthetic biohydrogen reactor (Anaerobic Baffled Reactor ,ABR), the Monod biokinetic model was combined with the kinetics of biohydrogen substrate consumption, and the entropy yield caused by heat, mass and chemical reactions during glucose consumption in the reactor under different conditions was investigated using numerical simulations. On this basis , the rates of glucose consumption and hydrogen production by photosynthetic bacteria were analysed, and the operating conditions of the reactor were optimised using the minimum entropy yield per unit hydrogen production rate as the evaluation principle. The results showed that the main order of influence of each factor on the performance of the folded plate type photosynthetic biohydrogen reactor was: light intensity > solution temperature > wall temperature > initial substrate concentration > hydraulic retention period. The optimum operating conditions were: culture solution temperature of 30 ℃, reactor wall temperature of 30 ℃, light intensity of 6000 lx, reactor hydraulic retention period (HRT) of 12 h and culture solution glucose concentration of 150 mol·m-3.