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1. Global Energy Basel 2012
The Current Situation of Energy Saving
and Low Carbonizing Effort in Tokyo
February 21, 2012
TOMOHISA TAKEBE

2. ACROS Fukuoka National Institute of Radiological
Sciences
Nagakute Japanese Government
Pavilion for Expo 2005 Aichi
Green

3. Incubation On Campus,
Waseda University Honjo Campus
Nihon University Funabashi Campus No. 14
NATC(Nissan Motor Co., Ltd.
Advanced Technology Center)
Wind

4. Mabuchi Motor Company Headquarters
Itoman City Hall
National Institute of Advanced Science &
Technology (AIST), Waterfront of Tokyo
Solar

5. Presentation Topics
1
4
1. Current situation of energy saving in
Japan and Tokyo after the earthquake
2. Low Emission Buildings TOP30 in
Tokyo, and the latest energy efficiency
technologies in Japan
3. Impact on the spread of Low Emission
Building by Tokyo’s Policy

6. 1. Current situation of energy saving in
Japan and Tokyo after the earthquake

7. 2
6
Hot and humid summer, and power shortage
気候図（1971年から2000年までの平均値）
Tokyo, Hot and Humid Summer 30 25
temperature (℃)℃）
Peak Power hike in Summer by 20
気温の月別平年値（
15
Cooling Load 10
5
A Big Social Experiment for 0
40 50 60 70 80 90 100
Energy Saving -5
-10
relative humidity (%)
In the Station and the Underground 相対湿度の月別平年値（
Tokyo B erln
i
％）
Wi
en S apporo
Passage, Escalators and Lightings Climograph
(Average value of 1971 to 2000)
were cut
In the Station In the train Escalator

8. 3
7
Energy-saving situation in the summer
Lighting has been reduced to about 300-500lx in the Office
Room Air Temperature have been raised to more than about 28 deg C
Elevators and Escalators have been partially suspended
Energy Consumption trend used has been shifted from Electric to Gas
Peak power could be reduced by 15-30% in 2011
all 3/4 1/2 1/4 No operation unknown > 29℃ 28℃ 27℃ 26℃ 25℃ < 24℃ unknown
2010 2010
summer
3 2 2 11 81
summer
0 33 11 33 13 8 2
2011 2011
summer
1 10 40 41 8
summer
2 66 15 14 31
1
Predicted in Predicted in
2012
2 9 35 33 20
2012
1 60 13 19 4 31
0% 20% 40% 60% 80% 100% 0% 20% 40% 60% 80% 100%
lighting reduction Room Air Temperature
< 300lx about 500lx about 750ｌｘ > 1000lx unknown No answer almost all units more than half units partially None suspended
2010 summer 2 19 49 16 14 2010
21 10 87
summer
2011 summer 16 55 14 1 15 2011
5 22 46 26
summer
Predicted in Predicted in
12 50 19 4 11 4 17 38 41
2012 2012
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0% 20% 40% 60% 80% 100%
Illuminance Elevator suspension
more than 30% 25% 20% 15% 10% 5% No reduction
2011 summer 17 26 27 14 11 41
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Peak Power reduction rate Source : the questionnaire by the TMG

9. Deterioration of the Emission Factor of 4
8
Power and Investment in BCP
 Deterioration of the Emission Factor of Power
(due to the nuclear power plant suspensions)
 We need to proceed further on Building Energy Saving
Deterioration of
the Emission
Factor of Power?
Value that reflects the
Kyoto mechanism credits
Trends in emissions per unit power (A General Electricity Utility)
Source : The Federation of Electric Power Companies of Japan
BCP (Business Continuity Plan)
 Raising Awareness of BCP (Business Continuity Plan)
 Increased of Investment in Power Generation System
(On -site Power Generation and Co-generation)

10. 2. Low Emission Buildings TOP30 in Tokyo, the
latest energy efficiency technologies in Japan

11. 10
5
Selection of Low Emission Buildings TOP30
 TOP30 buildings were selected in
line with the policy measures of
TMG.
 Existing buildings section:
Highly valued in the C&T Program
 New building section:
Based on the evaluation of the
Green Building Program
TOKYO
METROROLITAN
GOVERNMENT

12. TOP30 Existing Building Section
11
6
Top Level Facility Certification
In the Tokyo Cap-and-Trade Program
Assessment category Required General Extra
credit
I. General Management
Establishment of cooperative structures for energy 23 4 1
conservations, energy management status
II. Energy Performance (building Shells
and equipments) 26 39 45
Energy efficiency of air conditioning, lighting, and other
facilities, equipment efficiency (COP), etc.
III. Operations
Indoor temperature and humidity management, facility 25 56 9
maintenance and management, etc.
Total 228 items
 Top-Level Installation : Total Score of 80 or more
 Near-Top-Level Installation : Total Score of 70 or more
 Scores are set so that the total for Required items and General items is 100
 Extra credit items are added if additional items are applicable

13. TOP30 New Building Section
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7
Assessment of Energy Performance
In the Tokyo Green Building Program
Assessment category Criteria
I. Heat load resistance of the shell 20% or higher reductions from PAL
Heat insulation of walls and windows, standard (the national standard)
measures for shielding them from sunlight, etc.
II. Energy efficient equipments 30% or higher ERR standard
Introduction of energy saving measures in the (aggregation of the national standard)
facilities (air conditioning, lightings, ventilation,
water heating, and elevators)
III. Efficient operation systems Level 2 or higher
Measurement and energy management system Ex; Introduction of certain level of BEMS
for optimal operation
IV. Use of renewable energy Amount of renewable energy introduced
On-site installation of renewable energy Ex; 30kW in the case of PV
including PV and solar heat system
★ Perimeter Annual Load (PAL)
★★ Energy Reduction Ratio (ERR)
★★★ Building and Energy Management System (BEMS)

14. 13
8

15. The Latest Architectural Energy-Saving 14
9
Technology in Japan
 Double Skin Façade, Air Flow Window
 Louver, Light Shelve
 Solar control blind system
 Swing Window
 Lighting Duct Double Skin Air Flow Window
 Eco void for Natural lighting and Natural Ventilation
 Cool & Heat Trench for use of Geothermal Heat etc.
Eco void
Lee
Axis
Balance weight
Louver etc. Light Shelve Swing Window (Moving in the wind ) Cool & Heat Trench

16. The Latest Energy-Saving Technology in Air 10
15
Conditioning System and Lighting System
Air Conditioning System
 High Efficiency Heat Source Equipment
(Inverter Turbo Chiller and High Efficiency Heat Pump etc.)
 Geothermal Heat Pump
 Medium Temperature Chilled Water System
 Radiant Cooling and Heating System
 Separation of Latent Heat & Sensible Heat Air
Conditioning System
 Task & Ambient Air Conditioning System
Lighting System
 High Efficiency LED Lighting ( >100lm / W)
 Lighting Control System with Motion Sensors
and Illumination Sensors
 Task & Ambient Lighting System

17. 3. Impact on the spread of Low Emission
Building by Tokyo’s Policy

18. Tokyo’s Policy impacted on Low Emission 17
11
building
History of Low Emission Buildings
In Japan, Low Emission Buildings has been
built gradually since the mid-2000s
Accelerated in the 2010s
Low Emission Buildings and Management
High Interest Owners to CO2 Reduction are
actively investing in energy saving, as part
of their Management Strategy
Energy Saving has become business
challenges by Tokyo’s policy

19. Tokyo’s Policy impacted on Low Emission
building
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1. Tokyo Green Building Program
Japan’s First Building Environmental Evaluation
Propagated the Philosophy of Green Building
2. The Conditions of Urban Development to
Contribute to Low Emission
 Regulated the efforts of the carbon negative over a
certain level to be applied to urban development
 Effectively developers are required to build high-
environmental performance building only in their
large-scale development
3. Certification as Top-Level Installation
 Top-Level Installation has become a brand
 all leading developers aim for top-level installations

20. At the end : Next Stage to ZEB
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 In Japan, Advance the Development of ZEB aims to
realize the new construction for all public buildings to
be ZEB by 2030
Light Duct System Photovoltaic Power
VWV & VAV Control System Generation System
CO2 Outdoor Air Natural ventilation
Control System Night purge
LED Lighting Hybrid air conditioning
standard
Lighting Control control System case MJ/(m2･y)
Motion Sensors Passive Architecture
Control System Use of Natural Energy
High Efficiency Heat High Efficiency Heat Source
Initial Illumination Source Equipment Low Transport
Correction Control
System Integrated control System Utilization of unused
High Efficiency Lighting
Use Daylight Control energy of the city
System
Blind control System
Image of ZEB Low OA equipment
Other
PV
Amount of Energy-saving Technology
Source : For Implementation and Deployment of ZEB and Energy Saving

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Thank you for your attention