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CASBEE
Presented by:
Binisha Gurung 70011
Krisha Shrestha 70018
Pooja Bazimaya 70025
Pooja Thapa 70026
Prabal Dahal 70027
Green Building Rating Systems
Department of Architecture
Kathmandu Engineering College
December 20171
Supervisors:
Dr. Sushil B. Bajracharya
Lec. Anjana Shrestha Vaidya
Green Building Design
AR 825 02
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
1. Introductioni. What is green building?ii. CASBEE: Backgroundiii. Beginning and history of developmentiv. Types of CASBEEv. CASBEE for specific purposevi. Statistics of Buildings Assessed
2. Rating system breakdown
3. Scoring System
4. CASBEE Rating System
5. CASE STUDY: OBAYASHI TECHNICAL RESEARCH INSTITUTE i. Introductionii. Rating statusiii. Featuresiv. Graphs and Analysis
6. Comparison with other systems
7. Conclusion
8. Recommendation
9. References
2
CONTENTS
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
GREEN BUILDING
• Green, or sustainable, building is the practice of creating and using healthier and more resource-efficient models of construction, renovation, operation, maintenance and demolition. (EPA, USA)
• Design is itself an important factor to consider while talking about green building.
3Source: myfloridagreenbuilding.info
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 4
GREEN BUILDING RATING SYSTEM
Various green
rating systems
are established
globally to
evaluate the
sustainability of
construction
projects. Their
categories and
criteria have
been under
constant updates
to follow the
sustainable trend
of building
development.
(Science Direct)
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
• Comprehensive Assessment System for Built Environment Efficiency (CASBEE) is a method for evaluating and rating the environmental performance of buildings and the built environment.
• CASBEE was developed by a research committee established in 2001 through the collaboration of academia, industryand national and local governments, which established the Japan Sustainable Building Consortium (JSBC) under the auspice of the Ministry of Land, Infrastructure, Transport and Tourism (MLIT). (IBEC)
5
CASBEE: BACKGROUND
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 6
WHY CASBEE?
Enhance the quality of people's
lives
Reduce the life-cycle resource use
Reduce environmental loads
associated with the built
environment, from a single home to
a whole city.
CASBEE: BACKGROUND
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
BEGINNING AND HISTORY OF DEVELOPMENT:
• There has been a growing movement towards sustainable construction since the second half of the 1980s, leading to the development of various methods for evaluating the environmental performance of buildings.
7
(Athulya Aby, https://www.slideshare.net/athulyaaby/casbee-certification)
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
CASBEE
• CASBEE was developed by a research committee established in 2001, as part of a joint industrial/ government/ academic project.
• It was developed out of a three-phase process to consider sustainability issues to Japan and Asia.• The first phase: Improving indoor air quality with little
regards to exterior condition or building development• The second phase: Grew out of concerns over air
pollution in Tokyo in the 1960s• The third phase: Looking at the broad picture, the
impact of building on the interior and exterior environment. (CTBUH.)
8
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
BEGINNING OF CASBEE
CASBEE was developed according to the following policies:
• The system should be structured to award high assessments to superior buildings, thereby enhancing incentives to designers and others.
• The assessment system should be as simple as possible.
• The system should be applicable to buildings in a wide range of building types.
• The system should take into consideration issues and problems peculiar to Japan and Asia.
9
(Athulya Aby, https://www.slideshare.net/athulyaaby/casbee-certification)
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
TYPES OF CASBEE
• CASBEE is divided into four assessment tools:
• The first assessment tool: CASBEE for Pre-design, was completed in 2002
• The second assessment tool: CASBEE for New Construction in July 2003
• The third assessment tool: CASBEE for Existing Buildings in July 2004
• The fourth assessment tool: CASBEE for Renovation in July 2005. (JSBC), J. G. (2014).
10
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
BUILDING LIFECYCLE
11
Figure: The cyclical process of building design (JSBC), J. G. (2014).
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
BUILDING LIFECYCLE AND ASSESSMENT TOOLS
12
(JSBC), J. G. (2014).
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
PRESENT ASSESSMENT TOOLS1. CASBEE for Buildings (New Construction) 2014 edition*
2. CASBEE for Buildings (Existing Buildings) 2014 edition
3. CASBEE for Buildings (Renovation) 2014 edition
4. CASBEE for Market Promotion (2014 edition)*
5. CASBEE for Commercial Interiors 2014 edition
6. CASBEE for Temporary Construction 2007 edition
7. CASBEE for Heat Island (2010 edition)
8. CASBEE for Urban Development (2014 edition)*
9. CASBEE for Cities (2013 edition)*
10. CASBEE for Cities - Pilot version for worldwide use (2015 edition)*
11. CASBEE for Detached Houses (New Construction) 2014 edition
12. The former tool, CASBEE for Homes (Detached Houses) 2007 edition*
13. CASBEE for Dwelling Unit (New Construction) 2014 edition
14. CASBEE Health Checklist
15. CASBEE for Housing Renovation Checklist
16. CASBEE Community Health Checklist
13
(Conservation (IBEC), J. S.)
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
CASBEE FOR SPECIFIC PURPOSE
14
Application Name
For Detached HousesCASBEE for Detached Houses
(for New Construction, for Existing Building)
For Temporary Construction CASBEE for Temporary Construction
Brief versions CASBEE for New Construction (Brief Version), for Existing
Buildings (Brief version), for Renovation (Brief version)
CASBEE for Urban Development (Brief version)
Local government versions CASBEE-Nagoya, CASBEE-Osaka, CASBEE-Yokohama etc.
For Heat Island effect CASBEE for Heat Island
For Urban Development CASBEE for Urban Development
For Cities CASBEE for Cities
For Market Promotion CASBEE for Market Promotion(JSBC), J. G. (2014).
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
• As of March 2015, the number of assessed buildings exceeds 16,000.
• Since the system started in 2004, about 500 buildings in total throughout Japan have so far been certified (as of March 2016.)
15
STATISTICS OF BUILDINGS ASSESSED
Figs: Cumulative number of CASBEE certified buildings and Accredited Professionals
(source: CASBEE Brochure 2016)
UD: URBAN DEVELOPMENTMP: MARKET PROMOTIONDH: DETACHED HOUSESBD: BUILDING DESIGN
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
RATING SYSTEM BREAKDOWN
The overall scoring breakdown for CASBEE is broken down to the following categories:
16
ENERGY THERMAL COMFORT
RESOURCES & MATERIALS
NOISE & ACOUSTICS
OFFSITE ENVIRONMENT
LIGHTING & ILLUMINATION
AIR QUALITY
FLEXIBILITY & ADAPTIBILITY
BIOTOPE CONSERVATION
TOWNSCAPE& LANDSCAPE
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
RATING SYSTEM BREAKDOWN
Due to the complex nature of CASBEE, the percentage that each category contributes to the overall score, varies by project.
17
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
SCORING SYSTEM
18
ECO- EFFICIENCY:
• "Value of products and services per unit environmental load.“
• Integrated assessment of two factors: inside and outsidethe building site.
• In terms of input and output quantities,
"(beneficial output)/ (input + non-beneficial output)."
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 19
ECO- EFFICIENCY:Built Environment Quality
Q (Quality)
L (Load)
Built Environment Load
= BEE
SCORING SYSTEM
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 20
Built Environment Efficiency (BEE):
• Ratio of environmental quality and performance to environmental loading
BEE = Q(Building environmental quality and performance
L(Building environmental loadings
SCORING SYSTEM
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 21
Inside the boundary
as positive impact
evaluated by
Q: Built Environment Quality
Outside the boundary
as negative impact
evaluated by
L: Built Environment Load
Resource consumption
embodied CO2 emission etc.
Emission of air
pollutants, noise, heat
etc.
Soil, water pollutants
etc.
SCORING SYSTEM
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 22
If Q: Built Environment
Quality= 34 &
L: Built Environment
Load= 6.0 then,
BEE=𝑸/𝑳 =34/6.0 =1.7
Fig: BEE Ranking Chart
SCORING SYSTEM
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
CASBEE RATING SYSTEM
23
Q
L
BEE
value
Rating Assessment
3.0+ if
Q>50
S Excellent
1.5-3.0+ if
Q<50
A Very good
1.0-1.5 B+ Good
0.5-1.0 B Fairly poor
<0.5 C Poor
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
CASE STUDY OF OBAYASHI TECHNICAL RESEARCH INSTITUE
24
Project name
Type
(new/renovation)
Designer(s)
Owner(s)
Developer(s)
Year of construction
Address, Country
Building life span
Tecno-Station, Obayashi Corporation
Technical Research Institute
New
Obayashi Corporation, Design Division
Obayashi Corporation
Obayashi Corporation
2010
4-640 Shimokiyoto Kiyose-shi Tokyo, Japan
50 years
Figure: Main Building
Source: Sustainable Building Challenge 2011.
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
Project gross area above
ground [m²]
Project gross area (including
below ground) [m²]
Site area [m²]
Stories (above grade)
Occupancy type(s)
Typical building population
Number of operating hours /
year
Assessment phase
Assessment tool
Rating
25
5535,38
8255
69401
3
Office
200
2596
New
CASBEE 2008 v. 3.4
Class S BEE=7.6
Figure: Main Building
Source: Sustainable Building Challenge 2011.
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 26
Figure: Main Building- Techno Station
Figure: Master Plan
• It is the core facility of theInstitute of Technology
• Designed with state-of-the-arttechnologies developed byObayashi Corporation.
• Advocating three concepts ofcutting-edge environmentalconsideration, state-of-the-artsafety and security, and state-of-the-art researchenvironment.
Source: Oyabashi Corporation, Technical Research Institute
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 27
Figure: Multipurpose laboratory 1
Figure: Master Plan
• The main concept of the Multipurpose Laboratory is skeleton-infill building.
• By using the space flexible they will respond to the changes of the social demands quickly.
Source: Oyabashi Corporation, Technical Research Institute
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 28
Figure: Master Plan
Figure: Multipurpose Laboratory 2
• It is an experiment space where you can "fascinate" visualization and simulated experiences of technology.
• Experimental facility works on the fields of green innovation.
Source: Oyabashi Corporation, Technical Research Institute
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 29
Figure: Materials and Chemical Engineering Laboratory
Structural Engineering Laboratory
Fire Protection Engineering Laboratory
Electromagnetic Environment Laboratory
Environment EngineeringLaboratory
DynamicsLaboratory
Source: Oyabashi Corporation, Technical Research Institute
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
SPECIAL FEATURES:
30
Q-1 Indoor Environment - Ecological roof system that lets daylight into rooms thoroughly
- Solar radiation control system/Peri-buffer system that reduces air-conditioning
loads while allowing for open space structure
- Displacement natural ventilation system for large-scale space
- Sensible/latent heat separated personal radiant air-conditioning system that
treats for comfortable and energy-saving
- Use of task/ambient lighting system. Flicker control of task lights using IC tags
- Introduction of air-conditioning system using blower outlet on the floor in the
workplace, and control of CO2 emissions
- Personal floor diffusing air-conditioning system, and CO2 monitor control system.
Q-2 Quality of Service - A wide and open workspace with a vaulted high ceiling
- Ensuring flexibility by adopting large span frames and separated cores
- High seismic capacity (seismic isolation structure/Super active vibration control
structure)
- Enhanced reliability through installation of advanced information network
systems, power generators and uninterruptible power systems (UPS)
- Rainwater and well water treatment system
- Preparation of gravity water supply system for toilets and emergency sewage
tanks as a disaster preparedness
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
Q-3 Outdoor Environment on Site - Mitigating impact on the surrounding environment by adopting low-
rise building design and keeping large green space
- Improved thermal environment by introducing wet type of exterior
pavement materials
LR-1 Energy - 36 % reduction in PAL value
- 42 % reduction in ERR value, an integration of CEC values
- Natural energy utilization system including photovoltaic (150 kW)
/wind power generation, utilization of daylight, geothermal power and
natural ventilation
- Visualization system utilizing BEMS for raising environmental
awareness of occupants of the building
LR-2 Resources and Materials - Cascade using rainwater and well water for saving resources
LR-3 Off-site Environment - Decided location of facilities and trees with consideration for prevailing
wind and thermal environment
- Appropriate sound-deadening silencer for equipment on the roof
31
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
ECOLOGICAL ROOF SYSTEM
32
PHOTO VOLATIC PANEL SET UP IN 30 DEGREE
Solar panels installed on the entire of the slanted roof which generate highly effective power .
Source: Japnese Sustainable Building Database
TECHNICAL DETAIL OF Q1: INDOOR ENVIRONMENT
1. ECOLOGICAL ROOFSYSTEM
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
2. NATURAL LIGHTING BY REFLECTION OF INDIRECT LIGHT
33
• A slanted roof and a porch facing high side light were installed on a wide upper portion of the room .
• A System that diffracts skylight with less fluctuation on a reflecting surface eliminates the need of lighting during daytime .
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
3. PERI BUFFER SYSTEM
34
• This peri-buffer zone is intended to control impact of air-conditioning loads on the inside working zone, and consists of aisles, meeting space and lounges that are located around the working area and adjacent to an outdoor deck .
• A thermal buffer zone established around windows reduces airconditioningloads.
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
4. DISPLACEMENT NATURAL VENTILATION SYSTEM
35
• When outside air meets the predetermined conditions, an air-conditioner is stopped automatically. The air is discharged from high side lights on the upper of the building.
• This helps control adverse effects of increase in outside air temperature caused by sunlight reflected by exterior pavement materials
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
5. SENSIBLE/LATENT HEAT SEPARATED PERSONAL RADIANT AIR-CONDITIONING SYSTEM (O-TASC)
36
• Personal air-conditioning by using radiative-convective task panels.• A desiccant air-conditioner treats latent heat of the outside air properly, and brings
it into the zones through blower outlets on the floor.• Task panels treat sensible heat generated from human.
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
6. LIGHTING/AIR-CONDITIONING CONTROL SYSTEM USING IC TAGS
37
• IC tags that are used for security control detects if individual staffs are at their seats and in the office, and task lighting and air-conditioning systems are controlled to be turned on/off.
• Detailed switch control depending on the required time and location allows for eliminating unnecessary energy use.
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 38
•well water is used as heat source for the heat pump to improve the efficiency in heat source operation. •A heat source system that utilizes stable geothermal power throughout the year.
Source: Japnese Sustainable Building Database
TECHNICAL DETAIL OF LR1: ENERGY
1. HYBRID HEAT PUMP SYSTEM OF GEOTHERMAL AND WELL-WATER HEAT
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 39
2. VISUALIZATION SYSTEM
•The visualization system displays the effects of environmental measures on the monitor for occupants by utilizing the energy data obtained from BEMS.• It calculates and displays energy usage and its reduction in terms of CO2 emissions by it .
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 40
Source: Japnese Sustainable Building Database
CASBEE SCORE:
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 41
Source: Japnese Sustainable Building Database
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 42
CASBEE BREEAM LEED GRIHA
Year of commence 2001 1990 1998 2007
Country of origin
Japan UK USA India
Developed by Building Research Establishment Ltd
Geographical focus
Global, specially inJapan
Global Global Local
COMPARATIVE ANALYSIS
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 43
Characteristics
CASBEE
• Primarily on environment concern
• Having 3 stages of development
BREEAM
Two process of assessment1. Design stage2. Post
construction
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 44
Characteristics
LEED
• A voluntary tool constitute of 5 sustainability areas
• Industrial standard certification process
GRIHA
• Designed for building’s environmental performance in context to Indian atmospheric condition
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 45
CASBEE BREEAM LEED GRIHA
Assessment criteria for Green Building tool
Built environment
quality
Indoor
environment
Quality of
service
Built environment
load
Energy
Resources and
material
Off-site
environment
Management
Health and wellbeing
Energy
Water
Material
Transport
Waste
Landuse and ecology
Pollution
Sustainable site
Water efficiency
Energy and
atmosphere
Materials and
resources
Indoor
environmental
quality credits
Innovation in design
Regional priority
Sustainable site
Water management
Energy optimization
Sustainable building
materials
Waste management
Building operation
and maintenance
Innovation
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 46
Certification cost $3570-$4500$1290 each stage $1,250-$17500
5000sq.m. -3,14,000 Rs + 3.75 per sq.m. above 5000 sq.m
Results
Representation
Various graphs Pass
Good
Very good
Excellent
Certified
Silver
Gold
Platinum
50-60
61-70
71-80
81-90
91-100
Result Product
40%50%60%80%
CASBEE BREEAM LEED GRIHA
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
• CASBEE is a very good tool for evaluating the sustainability of a built space that is available to use worldwide, primarily in Japan, the country of its origin.
• CASBEE is highly technical and assesses a building on two main criteria viz Building load (L) and Building quality (Q).
• The results of CASBEE are prepared in form of build environment efficiency (BEE) graphs, histograms and spider webs apart from categorizing buildings as S(excellent), A, B+, B- and C(poor)
• Obayashi Technical Research Institute: Natural lighting, ventilation, ecological roofing, and other energy saving green strategies have been well used in the building.
47
CONCLUSION
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
• Nepal needs a rating system of its own. From design to completion, everything needs to be assessed for sustainability and energy efficiency.
• Though it may be difficult, there could be a master rating system in the world that could be sub divided for regional or local environmental and built environment assessment. This could help bring homogeneity in the evaluation.
• Bodies like the United Nations could regulate the system at global level.
48
RECOMMENDATION
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE 49
REFERENCES• (JSBC), J. G. (2014). An overview of CASBEE. Retrieved from Welcome to CASBEE: http://www.ibec.or.jp/CASBEE/english/overviewE.htm
• Agency, E. P. (n.d.). Environmental Protection Agency. Retrieved December 2017, from https://www.epa.gov/greenbuilding/pubs/about.htm
• Agency, E. P. (n.d.). Why Build Green Building. Retrieved December 2017, from https://archive.epa.gov/greenbuilding/web/html/whybuild.html
• Candace Say, A. W. (2008). CTBUH Journal. Retrieved from sustainable rating systems around the world:
http://global.ctbuh.org/resources/papers/download/1139-sustainable-rating-systems-around-the-world.pdf
• Conservation(IBEC), J. S. (n.d.). welcome to CASBEE. Retrieved from Welcome to CASBEE website:
http://www.ibec.or.jp/CASBEE/english/
• CTBUH. (n.d.). Sustainable Rating Systems Around the World. Retrieved December 2017, from
http://global.ctbuh.org/resources/papers/download/1139-sustainable-rating-systems-around-the-world.pdf
• Green Building Concept. (n.d.). Retrieved December 2017, from SCRIBD: https://www.scribd.com/doc/35910007/Green-Building-Concept
• IBEC. (2017). http://www.ibec.or.jp/CASBEE/english/. Retrieved from About CASBEE.
• IBEC. (n.d.). IBEC. Retrieved December 2017, from CASBEE: http://www.ibec.or.jp/CASBEE/english/backgroundE.htm
• Progress, T. (n.d.). Cost and Benefits of Green Buildings. Retrieved December 2017, from Think Progress: https://thinkprogress.org/costs-and-
benefits-of-green-buildings-ceef267baf06/#
• Obayashi Corporation. Japan Sustainable Building Database. 12 December 2017. Document. April 2011.
• Sustainable Building Challenge 2011. 12 December 2017. Document. October 2011.
• Inhabitat. (2017, December 12). Retrieved January 28, 2014, from inhabitat: www.inhabitat.com
Green Building Design: AR 825 02 December 2017
Green Building Rating System: CASBEE
THANK YOU
ありがとうございましたArigatōgozaimashita
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