PFM 21 7 Oct 2018 - Page 15



NEWS
news
Long-term Priva User Enhances Boiler
Control with Blue ID BMS
B
MS and process control
technology from Priva is
helping one of the UK’s topranking independent boarding/day
schools to improve the efficiency and
monitoring of its recently installed
boiler house. Priva’s Blue ID system
has been installed by CambridgeHOK
as part of a project that builds on a
legacy of Priva technology at Queen
Ethelburga’s Collegiate near York.
Queen Ethelburga's Collegiate is an
independent boarding and day school
for girls and boys from 2 months to
19 years old. Located in Thorpe
Underwood, northwest of York, the
school first opened in 1912. Today,
Queen Ethelburga’s comprises four
individual schools across its campus, as
well as a kindergarten. The senior
school has been co-educational since
1999 and draws pupils from over 50
countries.
and localised boiler houses under the
control of Priva solutions.
High-efficiency solution
More recently, the Estate Department at
Queen Ethelburga’s has installed highly
efficient, duel-fuel boilers that run on gas
and oil in the new ‘KEB boiler house’.
Here,
CambridgeHOK
was
commissioned
to
design
and
manufacture a control panel that
incorporates the Priva BMS control
system to supervise and control the
boiler house equipment, overseeing
functions such as domestic hot water,
water distribution, purification and UV
sterilisation.
“As several Priva systems were already
in place to control the many school and
residential buildings on site, we
developed bespoke software programs
to link the existing systems to the new
control panel,” says Mr Grant. “This
means that all Priva systems on site can
communicate effectively, passing on the
heating and hot water demands of the
campus to the new boiler house.”
The new central system represents a
much easier solution for such a large
site with many different heating
demands. Moreover, the newly
programmed Priva system ensures that
it will be much simpler for campus staff
to ensure everything functions to the
highest standard.
System overhaul
With over 100 years of history and a
substantial
capital
investment
programme across the 200 acre Estate,
changes to the fabric and infrastructure
of the buildings at Queen Ethelburga’s
are, from time to time, inevitable,
particularly when it comes to essential
provisions such as heating and water
services. CambridgeHOK, a long-time
Priva partner and installer, was first
invited
to
Queen
Ethelburga's
Collegiate to devise a system capable Process control
of controlling the school’s onsite sewage An important part of the technology’s
process control capability is protecting
treatment systems.
“As the school is in a fairly remote
location it handles its own sewage
treatment and purifies its own water,”
explains Duncan Grant, project lead at
Cambridge-HOK.
Following
the
successful installation of a Priva system,
the facilities manager asked what else
the Priva technology could do for the
school. “One major problem identified
early on was that the school originally
had multiple, smaller boiler houses
across the campus that had to be
individually monitored and maintained.”
Mr Grant started by scrutinising the
school’s existing control systems from a
diverse
assembly
of
different
manufacturers and, over time, replaced
everything with Priva technology. This
early stage of work brought six buildings
against legionella. Here, the Priva
technology runs the hot water tanks to
65°C and holds if for a prescribed time
before distribution. Legionella bacteria
multiply when temperatures are between
20-45°C and nutrients are available.
However, the bacteria do not survive
above 60°C.
The Priva equipment also monitors the
levels in eight underground tanks that
hold fuel for the boilers and red diesel
for other on-site uses.
“Priva Compri HX not only checks and
reports on fuel levels, it controls fuel
dispensing, too,” says Mr Grant. “Once
again this highlights the process control
capabilities of the Priva equipment.”
The latest technology
The most recent panels that Cambridge
HOK has delivered leverage the benefits
of the latest Priva platform, Blue ID. This
technology brings the two phases of the
project together.
“Thanks to the cloud connector, we can
interface with the Priva BMS system and
allow access by laptop remotely, which
makes life far easier for the maintenance
and estate staff,” concludes Mr Grant.
Priva Blue ID is a cost-effective and
modular BEMS that is flexible and easy
to use. The hardware consists of a base
on which individual functional modules,
containing
all
mission-critical
components, can be installed. Wiring
takes place on the base, which is robust
and insensitive to failures.
Reader Reply No: 217007
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