Main goals of the WP are:
– To perform a Statistical cluster analysis of existing building stock as basis for product standardization
– To obtain a detailed review of standards considering future development on this issue.
– To specify and document the testing procedures that will be performed within the course of WP1 and WP3
Task 2.1 – Statistical Cluster Analysis of existing Building Stock as Basis for Product Standardization (Task Leader: Frauenhofer ISE, Germany)
As basis for product development and standardization in this task the existing building stock in Germany has been analyzed. Since the residential building stock is very well documented, the challenge was to categorize the very heterogeneous non-residential building stock and to make an estimate of the actual number of non-residential buildings. For this purpose, a statistical cluster analysis of real construction projects was performed including detailed solar irradiation simulation and photovoltaic potential calculations resulting in five clusters of buildings with a low, medium or high suitability for photovoltaic applications.
Additionally, for an estimate of the number of non-residential buildings according to constructional requirements data mining techniques were used. However, instead of calculating “the” potential for BIPV which would be just a theoretical figure, for the purpose of this demonstration project general influential factors on the suitability for BIPV have been analysed, like the location, the building type and structural loads. These analysis can be seen as complimentary to the requirements researched in WP1 and will be used further in the module development in WP3. The developed methodologies can also be used in future scientific work on assessing “the” potential for BIPV.
Figure 1: Geographic distribution of buildings and wind zones.
Task 2.2 – Review of Standards for ingegrating BIPV-Modules in Building Façade and Roof (Task Leader: TU Dresden, Germany)
Building Integrated Photovoltaic (BIPV) modules are state-of-the-art technology. But, BIPV-modules as construction product and their integration are mainly non-regulated so far in Europe. This necessitates individual approvals, which are time and cost intensive. The legal situation in European countries concerning BIPV is diverging. To obtain a detailed review of the relevant regulations in Europe, it was necessary to collect and research the European Standards as well as national Standards and guidelines.
In view of the different legal situation concerning BIPV, the European BIPV regulations have to be harmonized step by step. An approach for a European Standard is given with the draft Standard prEN 50583 “Photovoltaics in buildings”. Based on the individual mounting categories defined by prEN 50583, the research was expanded and subsequently completed with other European Standards, National Standards and guidelines. The national regulations from eight European countries were reviewed to have a wide-ranging overview of the legal situations. Therefore national Standards and guidelines from Austria, France, Germany, Greece, Italy, Netherlands, Spain and Switzerland are mainly discussed. The results are summarized in a 260 pages report, which also includes a list of the reviewed regulations, both European Standards and National Standards as well as National guidelines. The report serves as a working basis for the other Work Packages of Construct PV.
Task 2.3 – Identification of Testing Procedures (electrical, mechanical and multifunctional) (Task Leader: ENEA, Italy)
The deliverable D2.3 is the result of the task T2.3 Testing Procedures (electrical, mechanical and multifunctional). A photovoltaic component for building integration (BIPV) is a complex technological system in which different requirements have to be met (electrical ones, and building ones) in order to ensure the overall desired performance of the component in the building system.
Being such a component a kind of “hybrid”, in order to test its performances test procedures have to be carefully evaluated. In coherence with this, in the absence of standards directly addressing BIPV components, this document reports a list of possible or recommendable standards and procedures for testing. These should be seen as a catalogue from which the most appropriate testing procedures should be chosen, in order to assess the performance of the Construct PV components.
In particular, a BIPV product has to comply with the Construction Product Directive, now repealed and replaced by the EU regulation 305/2011, that defines the seven basic requirements for construction works, which have to be fulfilled in addition to the electrical requirements.
In order to assess the BIPV product against these requirements, test procedures are needed. A first possible list of tests is given in the deliverable. Such tests include electric, mechanical and multifunctional aspects.
Moreover in order to understand what “tailored” testing procedures may be necessary, some pre-qualification tests have been carried out on the first samples (suited for roof applications) that were produced within the consortium, provided by Tegola. On such samples ENEA carried out an experimental campaign in order to get preliminary knowledge on the behaviour and endurance properties of materials (for instance to tackle and detect infant mortality problems).