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Photovoltaic

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IEA PVPS Task 15 project aims to create an enabling framework to accelerate the penetration of BIPV products in the global market of renewables.

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Operazione co-finanziata dall’Unione europea, Fondo Europeo di Sviluppo Regionale, dallo Stato Italiano, dalla Confederazione elvetica e dai Cantoni nell’ambito del Programma di Cooperazione Interreg V-A Italia-Svizzera

Ütia da Ju

renovation

conservation area

© Augustin Clement
Building use: 
receptive
IPV architectural system: 
canopy
IPV integration year: 
between 2006 and 2010
Source: 
Eurac Research
The building is embedded in the natural surroundings of Piz de Plaies © Augustin Clement
The solar canopy exposed on the wooded slope © Augustin Clement
Construction phase, the frameless modules are easily mounted © Augustin Clement
Timber structure hiding the modules fixing system © Augustin Clement
View from above of the BIPV glass roof: the visible ducts protect the electric connections © Augustin Clement
BIPV shading effect © Augustin Clement

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Ütia da Ju

Strada Ju 43, San Martino di Badia (BZ), Italy

Introduction

Stakeholders

Aesthetic integration

Energy integration

Technology integration

Decision making

Lessons learnt

Data

Producer and installer

Map

Author

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The PV system is integrated into the shading canopy applied to a tourist accommodation, hosting a restaurant, placed in Piz de Plaies. The solar canopy has a distinctive and original spiral structure exposed on a steep wooded slope of Val Badia, at an altitude of 1622 m.

STAKEHOLDERS

IPV system designer: 

Electro Clara Sas, Ertex Solartechnik GmbH 

IPV components producer: 

Ertex Solartechnik GmbH

Product type: 
modules
Address: 
Peter-Mitterhofer-Straße 4, Amstetten, Austria
Contact: 
info@ertex-solar.at +43 7472 28260
Web: 
https://www.ertex-solar.at/en/
IPV system installer: 

Ertex Solartechnik GmbH

Address: 
Peter-Mitterhofer-Straße 4, Amstetten, Austria
Contact: 
info@ertex-solar.at +43 7472 28260
Web: 
https://www.ertex-solar.at/en/
Other stakeholders: 

Prada Holzbau Srl

The BIPV system consists of semi-transparent trapezoidal PV modules running around the building roof with a uniform inclination and partially shading the terrace. The photovoltaic canopy is a modern structure harmoniously and elegantly integrated into the natural environment of a region bound to the traditional Ladin culture and language.

The BIPV system has been designed to have an annual electricity production of about 7,800 kWh to cover almost the whole building electricity demand. It feeds additional energy into the grid (Augustin Clement). Thanks to the modules' semi-transparency, the photovoltaic roofing system allows part of the sunlight to enter through the structure, contributing to the heating of the canopy, which is an enclosed space.

The 40 semi-transparent modules (Ertex VSG 140-211) were customized in order to match the building shape. Moreover, they had to get the specific texture and mechanical resistance as UNI7696 (Ertex Solartechnik GmbH). The modules are composed of laminated safety glass, encapsulating polycrystalline cells 2 cm spaced out. They are supported by a timber load-bearing structure, specially designed according to the modules’ shape. The structure beams hide the module’s fixing system and the cables from people staying below. All the electric connections are made of special UV-resistant cables. They are protected with waterproof ducts.

After discovering some interesting examples of BIPV installations at an Austrian exhibition, the restaurant owner, Augustin Clement, decided to apply the photovoltaic technology. He wanted to integrate it into the building in order to create an installation visible to all the visitors, aesthetically attractive and functionally useful also as a shading device. Even though the building is placed into a mountain environment, introducing an innovative element as a BIPV system did not raise any problem getting the planning permission from the public administration (Augustin Clement).

Ütia da Ju represents an exemplary case of a retrofit, where a complex structure bearing the integrated PV plant was applied after the building construction. The particular configuration of the solar canopy implies a great attention to details and specific construction solutions. The BIPV system has to guarantee the same functions as the traditional roofing system, e.g. water tightness, resistance to snow loading, to atmospheric agents, to fire, etc. It required an accurate design process which also took into account the aesthetic viewpoint. Finally, it resulted to be an expressive architectural element thanks to the module’s aesthetic appearance and the shading effect under the structure. The solar canopy covers an area which was equipped to accommodate the restaurant customers that can appreciate the attractive atmosphere.

PROJECT DATA

Project type: 
renovation
Heritage constraint: 
conservation area
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BIPV SYSTEM DATA
Architectural system: 
canopy
Integration year: 
2009
Active material: 
polycrystalline silicon
Module transparency: 
semi-transparent
Module technology: 
glass-glass, recognizable PV, customized modules
System power [kWp]: 
7.05
System area [m²]: 
100
Module dimensions [mm]: 
several
Modules orientation: 
from 75° West to 45° East
Modules tilt [°]: 
10
Annual PV production [kWh]: 
7,800
BIPV SYSTEM COSTS
Total cost [€]: 
36,200
€/kWp: 
5,135
€/m²: 
362
IPV components producer: 

Ertex Solartechnik GmbH

Product type: 
modules
Address: 
Peter-Mitterhofer-Straße 4, Amstetten, Austria
Contact: 
info@ertex-solar.at +43 7472 28260
Web: 
https://www.ertex-solar.at/en/
Open the full Producers map
IPV system installer: 

Ertex Solartechnik GmbH

Address: 
Peter-Mitterhofer-Straße 4, Amstetten, Austria
Contact: 
info@ertex-solar.at +43 7472 28260
Web: 
https://www.ertex-solar.at/en/
Open the full Installers map
Strada Ju 43, San Martino di Badia (BZ), Italy
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Eurac Research