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Focus area 2. Opting for high-performance systems Focus area 3: Complying with building energy performance
The main roof, located above the gym, offers a vast surface regulations
(1 000 m2) suitable for the installation of photovoltaic panels. It is the task of the building energy performance officer to ensure
The decision to install the photovoltaic panels with a tilt of 10% the building’s compliance with current legislation. Criteria differ
allowed more panels to be installed, as the amount of shading dependent on the type of building work (renovation or new-build)
was lower. With the building practically on a north-south axis, it and the type of building.
was decided to position them in line with this axis.The 126 260-Wc
panels generate 25,247 kWh a year 8. The Charleroi fire station can be broken down into three zones:
– An “office” zone covering the station’s administrative areas;
A gas-fired CHP (combined heat and power) system producing – A “production” zone consisting of the main garage, workshops
30 kW of heat and 15.2 kW of power is included in the project. It and storerooms…
provides sufficient power to cover the building’s hot water require- – A “miscellaneous” zone consisting of the firemen’s living and
ments, but also to run an absorption chiller covering part of cooling sleeping quarters, the gym, etc.
requirements. Linked up to hot water storage tanks, the chiller helps
cut peaks in energy demand and produces some 130,000 kWh a year. For each zone, the following criteria have to be met:
The combined production of heat, power and cooling is referred to – Level Ew80 10 for the “office” zone.
as “trigeneration”. – Level K45 11 for the envelope’s insulation (K55 for the
“production” zone).
Complementing this system, solar thermal panels produce hot – Compliance with the maximum U – thermal transmittance –
water in the summer when the CHP system is needed for cooling. values for the different walls.
The hot water can also be used when necessary by the absorption – Ventilation system compliance with Annex VI of the Walloon
chiller.The 18 panels produce around 20,790 kWh a year 9. Government Decree.
–The energy criteria K28 and Ew58 (planned performance levels)
are in the course of being validated 12. [Fig. 9]

Targets Concept Facilities installed

Produce energy Produce renewable energy locally – Photovoltaic panels on the roof

Energy distribution Installation of matching high-performance heating and air-conditioning – CHP system coupled with an absorption machine
Optimisation of mechanical ventilation Distribution of heat and cooling – High-yield condensation boilers
Outlets for heat and cooling – High-performance cooling system
Ventilation system
– Properly sized auxiliary systems
– Proper positioning of the technical rooms
– Minimisation of losses

– Positioning of the cold beams
– Radiators
– Air preparation in the air-conditioning units

– Heating and cooling
– Humidification and dehumidification
– Ventilation rates

Heat and cooling recovery –Twin-flow system with heat exchanger

Air distribution – Proper sizing of the ventilation ducts
– Right choice of inlets/outlets
Optimisation of artificial lighting Lighting concept – Right choice of fans

Optimisation of the building’s management Centralised building management system – Choice of lighting techniques
– Concept for direct/indirect lighting
– Lighting automation

– Monitoring of the building’s functioning
– Energy monitoring
– System regulation and coordination

Fig. 7: Opting for high-performance systems.