Case Studies
Université de Lorraine
Metz, France
Code: CS38
Original situation
1970's non-residential concrete building on the campus in Metz. The building is used as a training centre for the activities of IUT GMP, Lorraine University. A well and fast renovated building is the aim in this project and would be a big plus.
Renovation approach
External insulation with airtightness treatment on a structure with a complex shape to receive and fix an insulation. Reduction and treatment of thermal bridges in the façade by use of prefabricated elements. The prefabricated elements are currently tested for fire safety and the work on-site is about to begin.
Modernisation proposal
Prefabricated global retrofit to EnerPHit level thanks to a prefabricated wall system. Triple-glaze windows and a comfort ventilation system are already inserted into the wall.
Efficiency improvement
The improvement of an EnerPHit renovated building has an enormous effect in this cold part of the Jura near Geneva: it shows a plus 10x reduction on heating demand!
PHPP verification sheet before retrofit
| TFA | existing treated floor area (usable floor space) |
2730.0 m2 |
|---|---|---|
| Space heating | Heating demand |
128.3 kWh/(m2a) |
| Heating load |
55.0 W/m2 |
|
| Space cooling | Cooling & dehum. demand |
– kWh/(m2a) |
| Cooling load |
– W/m2 |
|
| Frequency of overheating (> 25 °C) |
2.0 % |
|
| Frequency of excessively high humidity (> 12 g/kg) |
0.0 % |
|
| Airtightness | Pressurization test result n50 |
3.0 /h |
| Non-renewable Primary Energy (PE) | PE demand |
144.0 kWh/(m2a) |
| Generation of renewable energy (in relation to projected building footprint area) |
319.0 kWh/(m2a) |
PHPP verification sheet after retrofit
| TFA | existing treated floor area (usable floor space) |
2730.0 m2 |
|---|---|---|
| Space heating | Heating demand |
23.5 kWh/(m2a) |
| Heating load |
13.0 W/m2 |
|
| Space cooling | Cooling & dehum. demand |
– kWh/(m2a) |
| Cooling load |
– W/m2 |
|
| Frequency of overheating (> 25 °C) |
1.0 % |
|
| Frequency of excessively high humidity (> 12 g/kg) |
0.0 % |
|
| Airtightness | Pressurization test result n50 |
1.0 /h |
| Non-renewable Primary Energy (PE) | PE demand |
62.0 kWh/(m2a) |
| Generation of renewable energy (in relation to projected building footprint area) |
70.0 kWh/(m2a) |
Key facts
Building typology
School | campus | university
Existing treated floor area (usable floor space)
2 730 m2
Building owner
Université de Lorraine
Consulting outphit partner
ProPassif
Project status
Construction phase
Overall budget
2 000 000 €
Contact
Romain Claret
AMO
PLAN 9
Phone: +33 383 31 77 72