Collège des Parcs, Neuchâtel - Roof only - Efficiency: 14.43% - CALECHE Solutions

The Building

Building pre-intervention

Building pre-intervention: Collège Parcs Neuchâtel_Pre_1_(C)STOA.jpg

Building pre-intervention: Collège Parcs Neuchâtel_Pre_2_(C)Batimag.jpg

Building post-intervention

Building post-intervention: Collège Parcs Neuchâtel_Post_1_(C)Freesuns.jpg

Building post-intervention: Collège Parcs Neuchâtel_Post_2_(C)Freesuns.jpg

Collège des Parcs, Neuchâtel

The century-old Collège des Parcs was in need of major renovation and upgrading. As project owner, the City of Neuchâtel wanted to restore the building to its original glory, adopting a renovation approach that respected its exterior and interior architecture, while improving its energy balance by installing an integrated solar roof.

The Solution

Solution pre-intervention

Solution pre-intervention: Collège Parcs Neuchâtel_Pre_3_(C)VilleNE.jpg

Solution pre-intervention: Collège Parcs Neuchâtel_Pre_4_(C)RTN.jpg

Solution post-intervention

Solution post-intervention: Collège Parcs Neuchâtel_Post_3_(C)Freesuns.jpg

Solution post-intervention: Collège Parcs Neuchâtel_Post_4_(C)Freesuns.jpg

Solution post-intervention: Collège Parcs Neuchâtel_Post_5_(C)Freesuns.jpg

What is the Solution?

At the Collège des Parcs, the architectural challenges were met by installing several thousand Freesuns solar tiles, capable of following the irregular curves of the historic roof without damaging it.

Why Does it work?

The solar tiles are perfect for such listed buildings, providing here 100% full coverage without altering the visual aspect of this heritage protected building.

PROS

Adaptable to site/building requirements (colour, texture, shape)
Resemblance to tiles (mimetic).
Preservation of the appearance of the listed building while producing energy in the roof.

CONS

Lower energy performance than standard modules.
Number of elements and "one-off" pieces.
More demanding to implement.
Much higher costs than a standard solution.

Type of installation

Replacement (building integrated - BIPV)

Part of the building

Roof only

Mounting system

information not available

Orientation

Divers orientation from S-E to N-O via S-W and N-E

Slope

Divers slopes from 25° to 55°

Area (m²)

1927

Availability

Yes, available on the market

Manufacturer

Freesuns

Model

Solaris Premium Black

PV module format

Customized modules

PV module format max

Basic dimensions of the rectangular tile : 700 x 460 mm (700 x 175 mm)

PV module type

Glass-Glass

PV cells technology

c-silicon

PV module efficiency

14.43%

Total PV power

192 kW

Surface PV power (W/m²)

100 W/m2

PV energy production

abt. 150'000 kWh/yr

Weight

47 kg/m2

Dummy modules used?

Yes

Frame

No

Overlapping

Yes

Colorization

No (black modules)

Colorization technology

No colorization

Glass structure

Shiny (with antireflection)

Additional documentation

Before retrofit

After retrofit

Assessment

PV installation type

Replacement (building integrated - BIPV)

PV position

Roof only

Coloured PV

No

Module efficiency

15% < Efficiency <= 20%

Building alteration

Yes, the building envelope was modified in a non reversible way

Investment cost

High

Circular approach

No

Location

2000 Neuchâtel NE, Switzerland - 500m

Climatic Zone:Cfb