Schlussbericht
(Englisch)
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SUNPLICITY TM is a new solar building element for tilted roofs. It has been designed, built and successfully tested in a combined effort in an industrial partnership between three Swiss and one US based company. Four test set-ups have been built and evaluated to optimise integration, design and electrical interconnection. The first one in Zürich was to prove feasibility, the second one in Rickenbach was to evaluate potential roofer's concern, the third one in Schwyz to optimise cabling and interconnecting issues and the fourth and final one at LEEE in Lugano to measure and evaluate expected temperatures in comparison with rack mounted PV modules. The temperature histogram over a given period was used to extrapolate expected lifetime of the plastic material and potential energy losses to the particular integration.SUNPLICITY TM fits in every conventional roof built from fibre cement shingles, which are widely used in northern Europe. Its dimensions are exactly identical to a conventional shingle, not only both in length and width, but also in thickness. The new solar roof shingle is absolutely plane and flat, as is a normal fibre cement shingle. The integration into existing roofs is therefore very straightforward: wherever the roofer wants solar shingles, he replaces conventional shingles with the new solar shingle Sunplicity. Even the electrical connections are in the same plane. A new interconnection design provides safe and reliable cabling of the PV array formed by the solar roof shingles.Two new polymer materials were used for the roof tiles. These were a non-EVA encapsulant and a backskin material that served as the edging for the tiles and also allowed for integral bonding of the wires from the module. Early problems included delamination of the encapsulant from soldered bus bars, bond strength of the backskin edging to the glass, and forming a secure connection within the module of the internal leads in the module with the external leads that were integrally bonded to the backskin. In work either concurrent with the time of the project or soon afterwards these issues were all successfully addressed. The one remaining question is the cost of the backskin material. This needs to be investigated further.
Auftragnehmer/Contractant/Contraente/Contractor:
Glas Trösch AG
Autorschaft/Auteurs/Autori/Authors:
Real,Markus
Hanoka,Jack
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