论文标题
通过受控混合装置优化赛道池塘中的微藻生产力
Optimizing microalgal productivity in raceway ponds through a controlled mixing device
论文作者
论文摘要
本文着重于混合策略，以增强赛道池塘中微藻的生长。假定该流量为层流，并且描述光系统动力学的HAN模型被用作确定生长速率作为光历史的函数的基础。假定控制混合的设备，这意味着，根据置换矩阵P，可以在每个新的圈子上重新排列细胞的顺序。细胞深度的顺序，因此在周期性的基础上对所感知的光进行了修改。光系统的动力学是在带有排列的赛道的K圈上计算出来的。证明，如果达到周期性的制度，它将在第一圈之后立即定期，这使得在测试所有排列时能够显着降低计算成本。考虑到优化生产，引入了与深度和一圈平均生长速率相对应的功能。提出了次优但显式的解决方案，并根据不同情况的最佳排列和其他策略进行了比较。最后，讨论了预期的增长率。
This paper focuses on mixing strategies to enhance the growth of microalgae in a raceway pond. The flow is assumed to be laminar and the Han model describing the dynamics of the photosystems is used as a basis to determine growth rate as a function of light history. A device controlling the mixing is assumed, which means that the order of the cells along the different layers can be rearranged at each new lap according to a permutation matrix P. The order of cell depth hence the light perceived is consequently modified on a cyclical basis. The dynamics of the photosystems are computed over K laps of the raceway with permutation P. It is proven that if a periodic regime is reached, it will be periodic immediately after the first lap, which enables to reduce significantly the computational cost when testing all the permutations. In view of optimizing the production, a functional corresponding to the average growth rate along depth and for one lap is introduced. A suboptimal but explicit solution is proposed and compared numerically to the optimal permutation and other strategies for different cases. Finally, the expected gains in growth rate are discussed.
