EuroSun2008-5

Ambient air temperature

For the testing of heat storages the ambient air temperature needs to be kept at a certain level. This is achieved by climatisation of the testing laboratory. By means of a constant ambient air temperature measuring errors are reduced.

Conclusion

Solar DHW-System Tests are carried out at Fraunhofer ISE since 1997. Until now it was possible to perform two tests of SDH systems at the same time. A completely new system testing facility was designed and engineered, which is set-up in September this year. With the new testing facility it is possible to perform four system tests at the same time. Furthermore, the boundary conditions during testing have been advanced (for example adjustable water temperature, climatisation of the testing laboratory, improved data acquisition system, etc.).

In addition, the new testing facility will not only allow the testing of solar heat storage tanks. Also detailed experimental investigations for the development and thermal characterization of more complex heat storage tanks with several heat sources will be possible.

References

[1] (2006). DIN EN 12976-1,2:2006 Thermische Solaranlagen und ihre Bauteile - Vorgefertigte Anlagen, Beuth Verlag Berlin

[2] (2008). prEN 12977-3 Thermal solar systems and components - Custom built systems - Part 3: Performance test methods for solar water heater stores

[3] (2006) prEN 15316-4.3:2006 Heating systems in buildings - Method for calculation of system energy requirements and system efficiencies - Part 2.2.3 Heat generation systems, thermal solar systems

EuroSun2008-5

Automatic Control System

The whole automation system is mainly divided into two parts: one part is the hardware equipments consisted of all kinds of devices used in the testing system; the other part …

The application of the regulations minimal solar collector area

Following the new regulations, a three bedrooms autonomous zone must have a minimal collector area of 4 m2 independently of the climate zone were is located. From the simulations results …

Measured sequences used for validation purposes

The comparison of experimental and calculated instantaneous power results, obtained after the different approaches presented in the previous section, is based on instantaneous efficiency measurements for a CPC collector (C …

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