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BEAM P
LUS FOR
E
XISTING
B
UILDINGS
E
NERGY
U
SE
(E
U
)
V
ERSION
1.2
E
U
9 M
ETERING AND
M
ONITORING
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 84
4
E
NERGY
U
SE
4.4
P
ROVISIONS FOR
E
NERGY
M
ANAGEMENT
E
U
9 M
ETERING AND
M
ONITORING
E
XCLUSIONS
Residential buildings.
O
BJECTIVE
Enable building operators to measure, monitor and develop measures to
improve the performance of the building’s engineering systems,
particularly concerning energy use.
C
REDITS ATTAINABLE
2 for centrally air-conditioned buildings, otherwise 1.
P
REREQUISITES
None.
C
REDIT REQUIREMENT
a) Electrical loads
1 credit for ability to measure and monitor all major electrical loads in the
building.
b) Central HVAC plant
1 additional credit where central chiller plant is provided with adequate
instrumentation to determine operating performance.
A
SSESSMENT
The Owner/Operator shall provide details of the measuring and
monitoring equipment installed and records of consumption, in order to
demonstrate that electricity use in the building can be adequately
monitored for audit purposes.
a) Electrical loads
Metering provision shall identify the electricity use pattern for each major
system, fed from the Landlord’s main switchboard(s), i.e., landlords
lighting and small power, transportation, plumbing & drainage systems,
major air handling equipment, such as centralised air handling units for
floors/zones, large designated areas, etc.
Electricity metering (for input power, energy and maximum demand),
together with associated measuring transducers/transformers for
indicating power and energy, shall comply with an appropriate standard
such as BS EN [ 1 ] and to at least accuracy class 1. Sensors for
temperature, flow rate and pressure measurements shall meet the
minimum accuracy requirements in ASHRAE Standard 114 [2] or similar
equivalent.
b) Central HVAC plant
Monitoring of central chiller plant will be assessed on the basis of BSRIA
Technical Note TN 7/94 [ 3 ] or similar specification published by an
appropriate authority. The monitoring system shall allow the overall
performance of the plant and individual chillers to be determined for all
operating modes and range of operating conditions.
B
ACKGROUND
Surveys of a large number of buildings in Hong Kong [4] revealed that
buildings are in general insufficiently equipped with measuring and
monitoring devices for measurement of energy performance. This makes
it particularly difficult to improve the energy efficiency of buildings and
major plant, such as the central chiller plant.
1
British Standard BS EN 60521:1995. Class 0.5, 1 and 2 alternating-current watthour meters.
2
ASHRAE. Standard 114-1986: Energy Management Control Systems Instrumentation, American Society of Heating,
Refrigerating and Air-conditioning Engineers, Inc., USA. 1987.
3
K Calder. The Building Services Research and Information Association. Practical Chiller System Monitoring. Technical
Note TN 7/94. 1994.
4
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.