QVT feedback & natural light in the center of the K-Line Les Herbiers factory

Genesis of a lighting project

Historically, the K-LINE teams were already familiar with Bluetek services well before 2020. Indeed, they had already worked with the Briand Group a few years ago in the Plaine de l'Ain industrial park located in Saint-Vulbas. Satisfied with the result, the K-LINE decision-makers simply renewed sound values ​​in terms of efficiency and organization, that is to say the services of collaborative work between the construction company Briand and the installer Bluetek.

A quality of life at work workshop as a starting point

Like many companies, the company K-LINE has invested in recent years in a reflection on the Quality of Life at Work. It is in this theme that one of the QVT workshops was articulated; the well-being also passes through a good quality of natural light inside the buildings. The proposal was supplemented by oriented sun screens allowing the elimination of the greenhouse effect via solar protection largely dissociated from the glazing. This is how the project was validated. It was going to improve the working conditions of the employees of the Vendée factory by providing them with brand new lighting.

Organization and timing

64 old polyester vaults were removed and replaced by Bluetek works teams. The service, based in Ambert in the Puy-de-Dôme, mobilized more than 6 people. This work was carried out during the summer closure, ie the first three weeks of August. The delivery of the devices has been split in order to respect the exposure time and avoid unnecessary storage. The sunshades were installed in September 2020. The overall service was widely praised by the Briand company.

Bluevoûte Therm and Voile-Dôme: the assurance of working comfort

The 64 Bluevoûte were supplied with runners and 1200 joules grids. They are equipped with a lateral or longitudinal sunshade of the Voile-Dôme type. One of the vaults is also equipped with 2 pneumatic Exuvoile type openings. The roof of the building has thus become a major opportunity for the diffusion of optimized natural light. It promotes working comfort, by limiting summer overheating and artificial lighting. It therefore enables energy savings to be made throughout the year.

Post-production light study

implantation

On this 23 m² building for 770 m in height (at the acrotère) were installed:

• East Zone: 18 Bluevault dimensions 2,1 X 7,89 m + Longitudinal Veil-Dome
• West Zone: 45 Bluevault dimensions 2,095 X 10,54 m + Longitudinal Veil-Dome
• Small area: 1 Bluevault dimensions 2,154 x 10,46 m + Side veil-dome

The vaults are fitted with a 16 mm thick colorless cellular polycarbonate (PCA) filling. Light transmission 33%. Gross solar factor 0,12. All the front windows have an overall light transmission of 70%.

Results

The overhead lighting installation, coupled with the lighting on the facade, was well designed. It achieves a natural light autonomy greater than 50% for 300 lux of illumination between 8 a.m. and 18 p.m., with a generally homogeneous light distribution.

The average FLJ of 2,8% is achieved on all zones for 60% and more light autonomy.

• Client: K-LINE / Les Herbiers (FR-85)
  • Contact: Marc Cotillon / Works and Maintenance Manager
• Works: Briand / Les Herbiers (FR-85)
  • Contacts: Cédric Girardeau / Chargé d'Affaires - Guerric Bruandet / Works Department Manager
• Supply of Bluetek skylights - Luynes (FR-37)
  • Contacts: Ludovic Berthonneau / Regional Sales Manager Bluetek
  • Daniele Mariotti / Research & Innovation Engineer
• Installation Bluetek Service Travaux - Ambert (FR-63)
  • Contacts: Danièle Boyer / Works Activity Manager - Marie Compte / Works Sales Assistant -
  • Daniel Marel / Editing Manager - Yannick Beal / Editor