PDF: BACnet Europe Journal 11 - 10/09

punkt als Standard relativ neu.
Bei der Fertigstellung 2005 ist
das „Bettenhaus G“ mit dem
Fabrikat Kieback&Peter auf
die neue BACnet-fähige JCI-
Leitwarte aufgeschaltet worden.
Multivendor GA-System
Inzwischen sind BACnet-Automationsstationen
Standard
geworden und im Klinikum
der Stadt Wolfsburg 2007 der
zweite Bereich im Haus C (Bettenzimmer)
mit dem Fabrikat
Sauter-Cumulus und 2009 der
dritte Bereich im Haus B und
Y (OP/ITS) mit dem Fabrikat
JCI erfolgreich in Betrieb gegangen
und werden auf die bestehende
GLT aufgeschaltet.
Die Firma Ebert- Ingenieure
plant seit Jahren für viele Projekte
BACnet als Gebäudeautomationssystem,
versucht
aber dabei immer die Kosten
und Systemanforderungen gegeneinander
abzuwägen.
Gerade für einen stufenweisen
Ausbau separater und
unabhängiger Gebäudeteile
mit mehreren Bauabschnitten
– wie in diesem Fall fast
über ein Jahrzehnt – eignet
sich BACnet. Man kann jeweils
den neuesten Stand der
Technik im Bauabschnitt ausschreiben
und an die bestehende
zentrale Leitwarte andocken.
Gleichzeitig begibt man
sich nicht in die Abhängigkeit
eines Herstellers und hält
sich die Optionen für künftige
Ausbaustufen offen. Gerade
im Bereich der Basisfunktionalität
und bei dieser Flächengröße
kommen die Vorteile
von BACnet eindeutig zur Geltung.
Wolfsburg Hospital treats
around 28,000 in-patients
annually. Since 2001, with
the aim of offering patients a
stay in a modern hospital and
achieving better management
of patient throughput, the existing
hospital buildings have
been successively modernised
and extended with new building
complexes. An important
milestone in this refurbishment
and expansion concept
was the opening of the new
Ward Block G in 2005, with
its small, patient-friendly
units. The subsequent conversion
of Block C in 2007 and
the linking of the two buildings
were carried out not just
for structural building benefits
but also for improvements
in building automation and
equipment control.
Technical equipment
in ward block buildings
In the wider context of hospital
infrastructure, the system
requirements of ward block
buildings are comparatively
less complex than most. With
typical technical building services
equipment such as ventilation
plants on the roof, combined
building services control
rooms with ventilation plant,
district heating feeds, heating
distributors, hot water tanks,
electrical power distribution
equipment in the basement
and small wall cupboards on
each floor, to which local data
points, for example fire safety
flaps or volume flow regulators,
are connected, these
buildings have more in common
with high quality administration
offices. With 270
beds on four floors and a gross
Magistrale zur Anbindung an die Bestandsgebäude.
Connection to existing building units.
Der neue Haupteingang der Klinik.
New main entrance of the hospital.
floor area of 16,397 m², the
project was of sufficient size
and had an adequate number
of systems requiring control
that BACnet could be proposed
as an economically attractive
alternative.
Manufacturer-neutral
tender
While the decision here in favour
of BACnet for the new
ward block was its first use in
this hospital, the primary control
system would continue to
be based on JCI equipment.
This solution for the project,
arrived at by a committed client
and operator, means that
the old JCI building management
control system could be
upgraded to the latest version
with the capability of communicating
with BACnet and the
new phase of building specified
as manufacturer-neutral
with BACnet automation stations.
Before the contract was
placed, system tests were carried
out for safety reasons between
the automation stations
and the primary control unit,
because BACnet was a relatively
new standard at that
time. On completion in 2005,
“Ward Block G” with its Kieback
& Peter systems was
connected to the new BACnetcapable
JCI control room.
Multivendor System
In the meantime, BACnet automation
stations have become
standard and were successfully
brought into use at
the Wolfsburg Hospital in
2007 in a second area in Block
C (wards) with Sauter-Cumulus
equipment, and in 2009 in
Anwendungen Solutions
a third area in Blocks B and Y
(OP/ITS) with JCI equipment
and are now connected to
the existing BMS. Ebert-Ingenieure
has designed building
management systems based
on BACnet for many projects
over the years, always with the
aim of balancing costs with
system requirements. BACnet
is admirably suitable for gradual
expansion of separate and
independent buildings in several
sections – as we have seen
here over almost a decade. It
is always possible to specify
the latest technology in a section
of a building and have
it dock with the existing central
control room. At the same
time, the client is not dependent
on a single manufacturer
and keeps the options open
for future expansion projects.
The advantages of BACnet are
clearly apparent in projects of
this size which require a basic
level of functionality.
Claus Roicke
Planer Gebäudeautomation
Ebert-Ingenieure
c.roicke@eb-ing.com
www.eb-ing.com
BACnet Europe Journal 11 10/09
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