Forschungsgruppe-NET - Hochschule Offenburg

Solar Heat

Summary and Outlook

The measured solar yields of the individual systems almost meet the expectations. All the systems have fulfilled the energy warranty. To achieve this, the systems needed fairly long trial runs and ensuing optimization. Without the in-depth measurement, analysis and monitoring of the solar thermal systems, the shortcomings/ deficits would not have been found and the systems would continue running with a reduced capacity and efficiency. The energy costs of large-scale solar thermal systems used for warm water heating are reaching a level that is competitive to conventional heating systems.

One should therefore not underestimate the systems’ contribution to environmental protection in general and its value for sustainable development. The use of solar thermal systems saves about 150 000 liters of fuel oil and 150 00 m3 of natural gas per year thus reducing CO2 emissions by about 300t.

Large-scale solar thermal systems for potable water heating have become standard. The insights gained by the prototype cooling plants regarding system control are putting solar cooling on the map of 21st century technology offering cost-effective eco-friendly solutions for modern air and room conditioning. Together the solar thermal systems for potable water heating and space heating or cooling can achieve a much higher solar fraction without running the risk of ineffective operation during the summer months. Our work is building the basis for an effective and smooth running of the solar thermal systems of the future.