Method to Identify
Building Energy Index (BEI),
NET BEI, GFA, NFA, ACA in several
projects in Malaysia since 2000
(including KeTTHA and agencies)
Malaysian Green Technology
Corporation
(GreenTech Malaysia)
Sustainable Energy
Development Authority
(SEDA) Malaysia
PREVIOUSLY KNOWN AS PUSAT TENAGA MALAYSIA
[email protected]
www.seda.gov.my
[email protected]
www.greentechmalaysia.my
May 2013
Building Consumption Input
System
1
Definition
Gross Floor Area (GFA),
Net Floor Area (NFA),
Air-Cond Area (ACA)
Building Energy Index (BEI)
Net Building Energy Index (Net BEI)
Definitions
Gross Floor Area (GFA):
Total area of all floors of a building as measured to the outside
surfaces of exterior walls and including flat roofs, halls, stairways,
elevator/lift shafts, attached garages / carparks
(undergound/attached/indoor), porches, balconies, basements,
offices but excluding voids and open/uncovered carparks.
Net Floor Area (NFA):
Also called Net-Usable Area or Occupied Area. Gross Floor Area
excluding Carparks & External Corridor; the area included in
surrounding walls of a building e.g offices, stores, meeting rooms,
risers, internal porches etc, or portion thereof.
Air Cond Area (ACA):
is Net-Floor Area which has air conditioning/ cooling spaces
excluding toilet (for some buildings) and M&E rooms.
Source: EAEF – Office Building Energy Benchmarking Project
GFA
NFA
ACA
Net Floor Area OR
Source: EAEF – Office Building Energy Benchmarking Project
BEI Defination as ;
Building Energy Index (BEI) [kWh/m2/year]
= Total Energy Consumption a year [kWh/year]
Total Occupied or Net Floor Area
[m2]
Total Energy Consumption is defined as total energy of
electricity (or electricity equivalent) consumed by the building
in kWh per annum.
•All energy consumed by the Gross Floor Area (occupied
and unoccupied in building including energy for ICT.
•Excluding energy produced by Renewable Energy.
Source: EAEF – Office Building Energy Benchmarking Project
NET BEI Definition as ;
NET BEI [kWh/m2/year]
= Total Net Energy Consumption
Total Net Floor Area
[kWh/year]
[m2]
Total Net Energy Consumption is defined as total energy of electricity (or
electricity equivalent) consumed by the building in kWh per annum and Total
Energy Generated (electricity equivalent) in the building.
• All energy consumed by the Gross Floor Area (occupied and unoccupied
in building including energy for ICT.
• Include energy produced by Renewable Energy.
NET BEI [kWh/m2/year]
= (∑ Energy Consumption - ∑ Energy Generated by RE ) [kWh/year]
Total Net Floor Area
[m2]
Notes : This conventional BEI formula has been used in series of government and
private projects and documents such as;
More than 38 government buildings in UiTM Energy Auditing Projects ECO-Energy-PTM (2000-2001).
12 Government Buildings Energy Audit by ESCOs & PTM (2003).
LEO Building (since 2002).
GEO Building (Since 2007).
EPU – DANIDA Integrated Resources Planning – EE in Office, Hospital & Hotels (2004-2006)
Putrajaya Government Energy Audit & Retroffiting Projects by KeTTHA / SEDA (2010 - 2012).
Prime Minister Office Enegry Audit by JKR (2010)
Low Carbon Cities Framework (by KeTTHA/GreenTech Malaysia and launched by YAB PM in Sept 2011).
Draft of Construction Industry Standard (CIS) 20, GreenPASS by CIDB (since 2011).
Europe Asean Energy Funding Project (Building Benchmarking PTM - NUS) (2007).
Online Building Consumption Input System (BCiS) (since 2010).
More than 50 Government Buildings in Putrajaya (by JKR Putrajaya).
Common Carbon Metric Building Study in Putrajaya (2010).
Energy Audits of Government Quarters by JKR & ECO Energy (2006).
Energy Audits of Government Clinic at Taman Ehsan by DANIDA-JKR (2003).
Energy Audits of Government Schools by JKR & ECO-Energy (2006)
Energy Efficiency Design of Government School Computer Lab (2004).
ESB-Panasonic Green Warehouse in Shah Alam (2012)
IKEA Warehouse Shah Alam by ECO-Energy (2007).
Private own buildings on commercial and industrial.
Energy Management project by the Industry / ESCOs.
Energy manager and Energy management training course.
Energy Audit trainings
Example - Monitored GEO Building Energy Index
20,000
97.9
15,000
10,000
96
63.0
33 32
140.0
120.0
104 105
100.0
90 92 91 93 88
75
69
75
73
65 62 64 63 62
60 62
80.0
68
60.0
40.0
40
37 34 40 33
37 35
36 35 33
35
34
33
32
32
31
30
30
26 27 28
23
23
20.0
00
5,000
0
111
110
160.0
0 0.0
Avera
Avera
ge
ge
(with
July
08
kWh PV
8,824 8,368
6,993 8,213 9,394 9,523 8,586 8,205 8,796 9,109 9,105 10,312 8,968 8,234 10,067 9,511 8,052 8,539 6,762 7,268 7,419 8,407 6,148 8,744 10,660
0
kWh Total
25,876 16,724
25,784 27,981 22,251 24,851 23,635 24,954 23,777 29,102 28,012 28,417 20,244 18,466 20,110 17,456 16,066 17,323 16,410 16,737 16,198 14,995 19,600 17,700 6,102
0
Num of Days
BEI [kWh/m2/yr]
97.9
63.0
BEI PV
33
32
Aug
08
Sept
Nov
Mac
May June July
Oct 08
Dec 08 Jan 09 Feb 09
Apr 09
08
08
09
09
09
09
Aug
09
Sept
Nov
Mac
May June
Oct 09
Dec 09 Jan 10 Feb 10
Apr 10
09
09
10
10
10
13
31
30
31
30
31
31
28
31
30
31
30
31
31
30
31
30
31
31
28
31
30
2
0
96
110
90
92
91
93
88
111
104
105
75
69
75
65
62
64
63
62
60
62
73
68
23
0
30
36
35
33
30
33
37
34
40
33
32
37
35
31
32
26
27
28
35
23
34
40
0
kWh PV
kWh Total
BEI [kWh/m2/yr]
BEI PV
Linear (BEI [kWh/m2/yr]
)
B E I [k W h /m 2 /y e a r]
1 6 ,7 2 4
25,000
180.0
6 ,9 9 3
2 5 ,7 8 4
8 ,2 1 3
2 7 ,9 8 1
9 ,3 9 4
2 2 ,2 5 1
9 ,5 2 3
2 4 ,8 5 1
8 ,5 8 6
2 3 ,6 3 5
8 ,2 0 5
2 4 ,9 5 4
8 ,7 9 6
2 3 ,7 7 7
9 ,1 0 9
2 9 ,1 0 2
9 ,1 0 5
2 8 ,0 1 2
1 0 ,3 1 2
2 8 ,4 1 7
8 ,9 6 8
2 0 ,2 4 4
8 ,2 3 4
1 8 ,4 6 6
1 0 ,0 6 7
2 0 ,1 1 0
9 ,5 1 1
1 7 ,4 5 6
8 ,0 5 2
1 6 ,0 6 6
8 ,5 3 9
1 7 ,3 2 3
6 ,7 6 2
1 6 ,4 1 0
7 ,2 6 8
1 6 ,7 3 7
7 ,4 1 9
1 6 ,1 9 8
8 ,4 0 7
1 4 ,9 9 5
6 ,1 4 8
1 9 ,6 0 0
8 ,7 4 4
1 7 ,7 0 0
6 ,1 0 2 1 0 ,6 6 0
30,000
2 5 ,8 7 6
35,000
8 ,8 2 4
8 ,3 6 8
E n e rg y C o n s u m e d / E n e rg y G e n e ra te d [k W h /m o n th ]
MONTHLY GEO BUILDING ENERGY PERFORMANCE
Examples of Low Carbon Buildings
by the Government
BEI = 65
Net BEI = 30 (86% reduce)
65 TonCO2/year
ASEAN EA : 2009/2010/2011
BEI = 114 (59% reduce)
1,490 TonCO2/year
Design BEI = 85 (>60% reduce)
637 TonCO2/year (**To verify)
ASEAN Energy Award : 2006
ASEAN Energy Award : 2012
BEI and Common Carbon Metric
(CCM) Study in Putrajaya (2010)