- Building automation (LONWORKS network)
The major asset in the Kuopio project is the advanced indoor climate management system, the LON network, which monitor and control humidity and air exchange according to certain parameters such as CO2-concentration, temperature and occupancy of the rooms. The system is designed to handle lightning and access control (outer doors) as well, which result in lower electricity use together with reduced heating demand.
Controlling CO2 in the indoor air
In order to sustain satisfactory levels of oxygen in the air, the CO2 content is measured, and again the airflow is regulated according to the data. The limit for CO2 concentration is fixed at 800 ppm to start with, but during coldperiods the level can be raised up to 1000 ppm.
Controlling duct pressure
The master PC controls the air pressure maintenance system of the mechanical ventilation system unit in order to maintain the calculated minimum duct pressure. The desired duct pressure varies according to need, which means that the air blowers use less energy, noise levels in the rooms are lower than in standard systems, and it enables flexible expansions and changes in the use of the rooms.
Lightning
As lightning is responsible for a substantial part of the energy consumption in buildings, in particular in the northern regions with long and dark winters, much energy is put into a feasible lightning system. All lightning within the premises is based on fluorescent lamps with high luminous intensity (about 90 lm/W, 58 W tubes), and the light fittings in the classrooms are high quality lamps where the luminescence of the light gap is small.
Lightning control is also integrated in the network. A bus system based on LON technology is used as the lighting control system, so thereby the LON network control system all lightning except the central hall, dining room, and sports hall due to reasons of economy. The existing network nevertheless has over 300 nodes on the LONsystem.
Cooling systems
The cold-storage rooms in the kitchens are equipped with their own refrigerating devices. A cold compressor is placed in the technical room of the mechanical ventilation system and the condenser with condensation circuits for each compressor, is in the outgoing ventilation ducting of the toilets. There is a glycol radiator for the recovery of the condensation heat.
Access control
The eight exterior doors of the building are physically connected to the same LON network segments as the lighting and mechanical ventilation system controls. The exterior doors are locked with Kaba electric striking plates controlled by access control terminals and by a timing programme. This means that the monitoring programme can record the use of the doors, and thereby regulate the openings by closing doors that stay open unintentionally. The control programme of the system is in the monitoring unit PC computer.
Suppliers of technology:
The entire building automation system is made up of numerous elements, such as lightning, ventilation, fans, PV-modules, sensors etc., and are manufactured by a range of different companies. However, the LONWORKS control system, both hardware and software, is produced and sold by Atmostech Oy in Finland.
Building automation and control:
ATMOSTECH OY, is supplier of building automation and district supervising
systems. This includes several devices:
- Software and hardware for communication between the elements of the control system
- Substations for DDC-control of air handling units and heat exchangers
- Room Controllers
- Temperature sensors
- Temperature thermostats
- Damper actuators
- Pressure difference transducers, switches and indicators
- Regulating valves and actuators
- Air flow transducers
Address: Atomitie 5A,
FIN-00370 Helsinki
Phone: +358 9 7511 2304 Fax: +358 9 7511 2393
www.atmostech.fi
Lightning:
HELVAR MERCA GROUP Helvar specialises in ballasts and lighting electronics used
by luminaries manufacturers and other involved in lighting. Helvar’s ballasts
and lighting control electronics form a product range, which includes
electromagnetic ballasts, standard and controllable electronic ballasts along
with analogue and digital lighting control electronics. Individual Lighting
Control systems are supplied by Helvar Merca Ltd.
Address: Purotie 3
FIN-00380 Helsinki
Phone: +358 (0)9 56541 Fax: +358 (0)9 5654 9600
e-mail: info@helvar.com
www.helvar.com
PV-modules:
NAPS SYSTEMS
Naps Systems supplies solar electricity grid-connected systems for integration
into buildings worldwide. Their solar modules come in standards of 50W, 75W and
100W as well as specially manufactured on customers specifications. Mounting
systems with profiles and mechanics for installation are available and can be
used for different roofs types as well as on façades. Lastly NAPS provides
string-inverters ranging from 700W to 2,5 kW.
Address: Pakkalankuja 7A
FIN-01510 Vantaa
Phone: +358 10 45 25711 Fax: +358 10 45 25744
e-mail: sales@napssystems.com
www.napssystems.com
Sensors:
VAISALA OYJ
Vaisala specialises in environmental and process condition measurement, and can
therefore supply special sensors for measuring humidity and CO2 air
concentrations.
Address: Vanha Nurmijärventie 21
FIN-01670 Vantaa
Phone: +358 9 894 91 Fax: +358 9 8949 2227
e-mail: industrialsales@vaisala.com
www.vaisala.com
