ENERGY
DIMPLEX HEAT PUMPS FOR
HELLESDON HOSPITAL
for a low carbon heating solution. Econic the collector system’s lifetime, estimated to
developed a system using two Dimplex be around 25 years.
SI50 TE 50kW heat pumps to draw heat Rachel Newson, director of business
from one of the largest ground collectors development at the Trust, explains: “We
of its type in the UK to date. As Dimplex wanted the new facilities to incorporate
was also able to offer grants of up to 50% best practice in low carbon building
under Phase 2 of the Low Carbon technology, in readiness for the 2018 zero
Buildings Programme, Econic was able to carbon target, so we were looking for a
secure £142,000 in grant funding for the partner to work with us to achieve our
project. carbon reduction plans. We chose
The design of the extensive ground Dimplex, and having found our partner
collector system took into account the we were able to access grant funding. The
geological conditions underlying the site, heat pumps will help protect the Trust from
hen the Norfolk and Waveney the heat yield available from the ground, any future unexpected increases in energy
W
Mental Health Foundation Trust and the annual heat load profile of the prices.”
decided to invest £8.2 million in new building. The installation of the In addition to the heat pumps, a wide
a new hospital unit, it needed to ensure collectors used hydraulic pushing variety of other energy-saving measures
that the building took into account the technology, with a 33 tonne 8 x 8 wheel have been incorporated into the build,
NHS’ target to be zero carbon by 2018, truck carrying hydraulic rams pushing a including high levels of insulation to
so installing Dimplex ground source heat steel casing into the ground, into which minimise heat loss and energy
pumps was a natural choice. the collector pipes were inserted. The steel consumption, low energy high frequency
The heating was required for casing was then withdrawn, leaving the lighting with automatic controls and
Hellesdon Hospital’s new award-winning pipes in the ground. A total of 120 25- harvested rainwater for the units’ WCs.
Psychiatric Intensive Care and Low Secure metre deep collectors were installed, Tel: 01489 773336
Units and the Trust consulted Econic, one which together are expected to produce a Email: marketing@dimplex.co.uk
of Dimplex’s heat pump installer partners, total of around 75kW per hour throughout www.dimplex.co.uk
NEW VERSATILE MODULAR CONTROLLER
FOR SOLAR PHOTOVOLTAIC PLANTS
arlo Gavazzi has announced a to ensure effective information Each VMU-O provides two PV panel
C
new versatile, reliable management. The core component is the temperature inputs and two relay outputs
management and control system VMU-M which performs local bus to manage alarms (such as the integrated
targeting small to medium or high power management of measuring units and I/O anti-theft system) and external loads (such
solar photovoltaic (PV) plants. The new modules. The VMU-M assigns the proper as lighting and PV washing systems). The
controller is designed to enable the plants local unit address automatically and VMU-S measures DC output from the PV
to meet growing demand for clean gathers all local measurements from the panel. VMU-P collects relevant
sources of energy by maintaining efficient VMU-S and VMU-P, simultaneously environmental data (through external
operation, maximising performance and connecting with the external world through sensors) such as wind speed, air
strengthening the Return on Investment. VMU-O modules. temperature and irradiation. Eos-ArraySoft
Easy to install The Eos-Array has a modular design can download the Eos-Array system
and configure, the allowing the control to be scaled up or memory to the PC, for scheduled or on-
new Eos-Array down according to requirements and demand plant efficiency calculations and
from Carlo budgets. A single master VMU-M can alarm analysis.
Gavazzi comprises control 15 Eos modules on its local bus; A typical 50kW plant would use one
individual modular including up to seven VMU-O I/O VMU-M unit for data logging and local
elements that, modules and one VMU-P unit. With no bus management, ten VMU-S units for
when interacting auxiliary bus wiring, the system is simple string control (50kW total for 228x220W
with one another, to install and straightforward to expand. PV panels, 12.5A/400V single string), one
provide a Further cost saving is provided by the VMU-O for I/O management and one
complete and integrated string fuse protection and VMU-P for environment measurements.
independent modularity also improves overall system Eos-ArraySoft software is installed in a
control solution reliability. String efficiency and inverters local PC to provide data collection and
that gathers are controlled locally enabling operators historical analysis.
accurate and to rapidly isolate faults, failures and www.carlogavazzi.co.uk
dependable data inefficiencies.
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SUSTAINABLE FM | NOVEMBER/DECEMBER 2009
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