Flows and their effects

The main objective of the development activities of multi-axis solar tracking units is to maximise the anticipated financial yields of the systems.  This is achieved by increasing the capacity of the PV modules and reducing the costs of the frame by saving materials.

This is opposed by considerable stresses placed on the system by wind and snow, and the requirement to guarantee safe operation over a period of 20 years.

In order to meet all of these requirements, H&H has developed a unique flow-optimised and patented solar tracker on behalf of Conergy AG. The simulation of the stresses exerted by high wind speeds played a particular role in this project. H&H analysed both the properties of a single tracker in various positions and the impact of slipstream effects on the overall field. The results of the CFD calculation with respect to the distribution of pressure on the PV modules were transferred as load assumptions to the structural-mechanical FE models.

This made it possible to examine the cost of and optimise the individual components and how they interact within the overall system. Approx. 3,000 tracking systems are already in operation.

Solar tracker and Solar field