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BEAM P
LUS FOR
N
EW
B
UILDINGS
A
PPENDICES
V
ERSION
1.2
8.1 A
NNUAL
E
NERGY
U
SE
Copyright © 2012 BEAM Society Limited. All rights reserved.
A - 5
Figure 8.1
Building energy performance assessment
8.1.3 K
EY
F
EATURES
The key features of the Performance-based Approach are as follows.
the ‘Energy Budget’ for an ASSESSED BUILDING is the predicted
Annual Energy Use for a BASELINE BUILDING (zero-credit
benchmark);
the BASELINE BUILDING model has the same shape and
dimensions, comprises the same mix of areas and types of premises
as the ASSESSED BUILDING (except for window-to-wall ratio
adjustment to meet the relevant regulatory requirement);
the BASELINE BUILDING model will incorporate a range of standard
(default) characteristics such that the model represents a building
whose energy performance barely meets the relevant regulatory
requirements or meets only ‘basic’ design quality ;
as far as possible the predicted Annual Energy Use of the
ASSESSED BUILDING will be based on its specific design
characteristics (except for some parameters for which default values
are specified - see Section 8.2); and
the number of credits awarded is determined by the percentage
reduction in the predicted Annual Energy Use or Annual CO
2
Emissions of the ASSESSED BUILDING relative to the BASELINE
BUILDING.
(SIMULATION)
SHAPE AND DIMENSIONS, MIX OF AREAS
AND TYPES OF PREMISES SAME AS
ASSESSED BUILDING
DEFAULTS CHARACTERISTICS:
BARELY MEET MINIMUM PERFORMANCE
CRITERIA IN CODES/STANDARDS OR
‘BASIC’
PREDICTED ENERGY USE AND PEAK
ELECTRICITY DEMAND
∑
(A/C ENERGY + LIGHTING + EQUIPMENT
ENERGY)
ASSESSMENT OF ANNUAL ENERGY USE AND PEAK ELECTRICITY
DEMAND
ZERO-CREDIT BENCHMARKS FOR
ANNUAL ENERGY USE
AND
PEAK ELECTRICITY DEMAND
ASSESSED BUILDING
(SIMULATION)
SHAPE AND DIMENSIONS
ORIENTATION
ENVELOPE
MIX OF AREAS
TYPES OF SYSTEMS
--
SPECIFIC DESIGN
DESIGN ENHANCEMENTS NOT
INCLUDED IN BASELINE BUILDING
SIMULATION
+
APPLICABLE DEFAULTS
PREDICTED ANNUAL ENERGY USE
AND PEAK ELECTRICITY DEMAND
PERCENTAGE REDUCTION IN ANNUAL ENERGY USE
AND PEAK ELECTRICITY DEMAND (WHERE APPLICABLE)
ANNUAL ENERGY USE CREDITS
PEAK DEMAND CREDITS
AWARDED FOR THE ASSESSED BUILDING
ENERGY BUDGET FOR ASSESSED
BUILDING