It is shown that only four characteristic values determine the optimum stiffness variation.
There is no agreement on how to derive the optimum secular variation model and IGRF candidates generally follow rather different methodologies.
The paper firstly analytically investigates the general optimum speed variation for off-design efficiency with an analytical approach proposed by the last two authors.
The shape gradient function calculated from a non-linear finite-element analysis is applied to the H1 gradient method for shells proposed by one of the authors to determine optimum shape variation.
In order to augment these variations, we propose the normalization of the values using linear quantization and the selection of the optimum prosodic variations.
It is supposed that the differences in the ingredients, enzyme source and activity as well as processing conditions all lead to the optimum dosage variations of enzymes.
Depectinization kinetics was also studied at optimum temperature and variation of kinetic constants with enzyme dose was evaluated.
Since there is always a risk of not finding the real optimum by single variation method, more advanced optimization approaches such as multivariable approach (MVA) should be applied.
While operating at the achieved optimum design, the variation of the exergy destruction of each component and the whole system due to the change in the cooling load has also been investigated.
