Powerful worm gears from NORD Drivesystems are employed by Solarpark Rodenäs GmbH of Germany to drive their tracking systems for solar panels.
Intelligent tracking technology from Solarpark Rodenäs GmbH increases the efficiency of photovoltaic plants, while requiring robust geared motors to position and securely hold solar modules against strong winds.
Solarpark Rodenäs GmbH specialises in fastening systems for solar panels. As solar cells are most efficient when the sunlight falls onto them vertically, precise tracking of the sun considerably increases their efficiency.
In addition to tracking systems with a fixed mounting, the company develops manually controlled as well as fully automatic systems for tracking the sun.
But commonly available drive units use conventional brakes and require heaters to prevent them from freezing. These cost and maintenance-intensive components also increase the energy consumption of the drive unit.
Solarpark Rodenäs required a solution that offered weather-resistance, precision, energy efficiency and economy.
The company decided to use compact, powerful geared motors from NORD Drivesystems at the Rodenäs Solar Park to drive their tracking systems.
The tracking control is calculated on a daily basis from the data for sunrise and sunset. At sunrise, the solar panels turn to the east in order to track the sun over the course of the day.
Every 15 minutes, NORD geared motors are activated by an impulse from the central control unit to track the sun for four degrees and then switch off again. The gear-driven tracking enables the solar collectors to achieve 25-30% greater efficiency in comparison with fixed collectors.
Each solar panel has a surface area of 16m², offering a large area of resistance to the winds from the North Sea. The gear units from the modular Universal series, which combine two worm gear sets, hold the panels in position without additional brakes, positioning the panels precisely and firmly against winds, which often exceed force 10 gales.
Over 700 geared motors are doubly protected from the harsh North Sea climate by the corrosion resistant one-piece aluminium housing and a special paint. A high quality synthetic lubricant ensures reliability even at sub-zero temperatures and also minimises maintenance.
In addition to functional and dynamic advantages over drives requiring mechanical intervention, operators also profit from the low maintenance costs of the drive solution from NORD Drivesystems.