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ENERGY & SMART BUILDINGS

10

No 20 | October 2017 |

OPE

journal

L

echwerke (LEW), located

in the city of Augsburg,

Germany, has extended

its “Energy Façade” project by

integrating HeliaFilm, a solar

film made by Heliatek GmbH

from Dresden, Germany. Over

the next few years, the resulting

test platform will be used to

measure the output of the

organic photovoltaic films in a

direct comparison to conventi-

onal solar technology. The buil-

ding has now been upgraded

both energetically and visually

by this BiOPV (Building Inte-

grated Organic Photovoltaics) solution.

Building envelopes already provide sev-

eral functions. For industrial buildings, the

energy efficiency retrofit is becoming more

important. Energy suppliers like innogy SE

want to offer their customers the smart idea

of generating power on the façade while

simultaneously saving costs and contributing

to climate protection. The Lechwerke AG,

a regional energy supplier that belongs to

innogy SE, is now evaluating several solar

technologies. As part of the project “Energy

Façade”, which has launched three years

ago, two areas of its southern façade have

now been equipped with SVK fiber cement

elements covered by HeliaFilm. A total

area of 56m² with an installed capacity of

2.43kWp is expected to deliver an esti-

mated yield of about 2000kWh per year.

Simple upgrades

The solar film HeliaFilm, developed

and produced by Heliatek, is reported to

offer significant advantages in terms of

integration on existing commercial and

industrial buildings. Through previous

projects, Heliatek has demonstrated that

existing buildings can be upgraded to this

type of energy with far less effort and

cost when compared to conventional PV

modules. In contrast to those modules,

Heliatek solar films are integrated directly

into the building material at the factory of

façade element producer SVK. They are then

simply connected at the construction site.

The low weight of the films (1 kg/m2)

allows for an easy and low-cost integra-

tion both on new and existing façades.

Aesthetics also played an important role

in the façade design at Lechwerke Augs-

burg. The HeliaFilm solar films set visually

appealing accents, with a light background

on bright fibre cement elements. While

aesthetically pleasing, HeliaFilm reduces

a building’s carbon footprint drastically

by 20g of CO₂ per generated kWh.

Thibaud Le Séguillon, Heliatek’s CEO,

adds: “Energy production on the façade

is our core focus. For us, the renovation

market is one of the most important target

markets. With innogy SE and

SVK, we have long-term

partners which will support us

reaching into the B2B market.

We look forward to establishing

successful co-operations. “

Expansion of

renewable

energies

LEW’s member of the board,

Norbert Schürmann, says: “In

the expansion of renewable

energies, we are well ahead

in our region. Photovoltaics

play a central role. We offer

our customers and our partners a compre-

hensive range of solutions. We test new,

innovative technologies in practice. We

are convinced that this pilot project will

also provide valuable insights and new

potentials for the future of photovoltaics.”

Carl-Ernst Giesting, head of B2B at

innogy SE, adds: “In order to place a

saleable product, in conjunction with

Heliatek, in the coming years, we are now

entering the next phase with customer

trials. In concrete terms, we are work-

ing on simple concepts for assembly and

electrical installation, which, in addition to

higher yields and a resource-saving pro-

duction, can be a further advantage over

conventional photovoltaic technology.”

The HeliaFilm façade at LEW Augsburg

The future belongs to

building-integrated

organic photovoltaics

Heliatek and Lechwerke Augsburg expand energy façade with HeliaFilm