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BEAM P
LUS
I
NTERIORS
C
OMMERCIAL
, R
ETAIL
A
ND
I
NSTITUTIONAL
E
NERGY
U
SE
(EU)
EU 5 M
ETERING AND
M
ONITORING
Copyright © BEAM Society Limited. All rights reserved. Page 91
ii.
consumption records, meter readings, logbook or print output;
iii.
drawings, as-built electrical schematic, location layouts;
iv.
manufacturer’s technical specification, technical data sheets;
v.
O&M manuals;
vi.
testing and Commissioning records;
vii.
record Photographs;
b) Thermal energy meters for chilled water sub-metering
Criteria
Thermal energy meters for chilled water sub-metering shall provide
data every minute, hour, day, week and monthly of chilled water
energy consumption for the project area.
The metering and associated measuring transducers/transformers for
indicating flow rate, supply and return temperature of chilled water
and energy, shall comply with an appropriate standard such as EN [
2]
and to at least accuracy class 2.
Documentation
Credit shall be achieved when the Applicant provides the
documentation stated below, to demonstrate criteria compliance:
i.
list responsible person,
ii.
consumption records, meter readings, logbook or print output;
iii.
drawings, as-built chilled water schematic, layout drawing;
iv.
manufacturer technical specification, technical data sheets for
meter, transducers, and sensors;
v.
testing and Commissioning records;
vi.
record photographs;
B
ACKGROUND
Surveys of a large number of premises in Hong Kong [
3] revealed that
buildings are in general insufficiently equipped with measuring
devices for measurement of energy performance. Furthermore, other
than basic metering for billing purposes, interiors projects rarely
provide sub-metering so occupiers remain ignorant of when and
where energy is consumed.
Whilst sub-metering in itself does not save energy, meters that are
installed correctly encourage and provide the information for the
monitoring and targeting conservation.
Opportunities for reducing energy consumption can be identified only
if it is possible to monitor performance of the systems. Good
monitoring systems provide record for part load performance, not only
improving efficiency, but also improving the control of the building’s
thermal comfort conditions. Plant control can be altered and the
results monitored to show how energy consumption changes. Unseen
plant faults, which are not evident during routine maintenance, but
which can be identified from analysis of performance trend data.
Control problems can be detected and control strategies improved to
match the building demand.
Opportunities for reducing energy consumption can be identified only
if it is possible to monitor performance of the installed systems and
2
British Standard BS EN 1434-5:2007. Heat meters. Initial verification tests
3
Yik F W H, Chiu T W. Measuring instruments in chiller plants and uncertainties in performance evaluation,
Transactions, The Hong Kong Institution of Engineers, 5(3) 95-99.