Energy efficiency building code presentation prepared by Jhanvi Desai

1. Presentation On
Energy Efficiency Building Code
Guided By:
Prof. Ankita Parmar
Prof. Hemali Jardosh
Prepared By:
Desai Jhanvi Rakeshbhai (190420717002)
PG Center
Masters in Environmental (2019-2020) Engineering
GUJARAT TECHNOLOGICAL UNIVERSITY
SARVAJANIK COLLEGE OF ENGINEERING & TECHNOLOGY
Dr. R. K. Desai Marg, Athwalines, Surat – 395001
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2. CONTENTS
• INTRODUCTION
• ENERGY CONSERVATION ACT 2001
• ENERGY CONSERVATION BUILDING CODE
• ECBC SCOPE
• FEATURES OF ECBC
• ECBC IMPLEMENTATION
• CASE STUDY
• REFERENCES

3. INTRODUCTION
• In the rapidly growing economy of India, the energy requirements are
increasing at a fast pace. The Government of India, at the highest level, is
giving top priority to the attainment of nation’s long-term energy security.
• Building energy use in India is likely to grow given socio-economic
trends. Recognizing a huge potential for energy savings in new
construction of commercial buildings, India launched the Energy
Conservation Building Code (ECBC) in 2007. ECBC sets requirements for
building elements that impact building energy use.
• The U.S. Department of Energy and its Pacific Northwest National
Laboratory (PNNL) have been helping India facilitate ECBC
implementation for years and have made significant progress at the national
and state levels.

4. • ECBC was developed as a first step towards promoting energy efficiency in the
building sector. The ECBC is the result of extensive work by the Bureau of
Energy Efficiency (BEE) and its committee of experts. It is written in code-
enforceable language and addresses the view of the manufacturing, design and
construction communities as an appropriate set of minimum requirements for
energy-efficient building design and construction.
• The Central Government has powers under the EC Act 2001, the state
governments have the flexibility to modify the code to suit local or regional
needs and notify them.
• The ECBC defines norms of energy performance and takes into consideration
the climatic regions of the country where the building is located. The major
components of the building which are being addressed through the code are:
Envelope (walls, roofs, windows), Lighting system, HVAC System, Water
heating and pumping system, Electrical Power System.

5. • In the year 2001, the Parliament of India passed an act for efficient use of
energy and its conservation termed as ‘Energy Conservation Act 2001.
• As an in-built provision of this act the Bureau of Energy Efficiency (BEE) was
established to meet the following objectives:
 To exert leadership and provide policy framework and direction to
national energy conservation and efficiency efforts and programs.
 To coordinate energy conservation policies and programs and take it to
the stakeholders.
 To establish systems and procedures to measure, monitor and verify
energy efficiency results in individual sectors as well as at a macro level.
 To leverage multi-lateral and bi-lateral and private sector support in
implementation of Energy Conservation Act and efficient use of energy
and its conservation programs.
 To demonstrate delivery of energy efficiency services as mandated in the
EC Act through private-public partnerships.
 To interpret, plan and manage energy conservation programs as envisaged
in the Energy Conservation Act.
ENERGY CONSERVATION ACT 2001

6. Birth of the code

7. ENERGY CONSERVATION BUILDING CODE
Purpose
The purpose of the Energy Conservation Building Code
(Code) is to provide minimum requirements for the energy-
efficient design and construction of buildings. The Code also
provides two additional sets of incremental requirements for
buildings to achieve enhanced levels of energy efficiency that
go beyond the minimum requirements.

8. Journey of code
https://idoc.pub/documents/ecbc-presentation-by-bee-eljq6eydmd41

9. Key objectives of ECBC 2017 development
• Set a long-term vision for building energy efficiency
• Include new types of buildings
• Focus on design strategies for reducing energy use
• Establish a baseline of energy performance and promote buildings that go
beyond the
code
• Ease of compliance and enforcement
ECBC 2017 Update Process
• Step 1: Forming Steering committee, Technical Committee, & Working Groups
• Step 2: Identifying update priorities and vision
• Step 3: Finalization of update process, structure, and methodology
• Step 4: Finalization of baseline building specification for 16 building prototypes
in 5
climatic zones
• Step 5: Finalization of Stringency analysis for all building components
• Step 6: Consultations Delhi (North), Mumbai (West), Bangalore (South) and
Kolkata
(East)
• Step 7: Development of a draft code addressing all suggestions and comments
• Step 8: Submission of draft code to Steering committee and BEE for approval
• Step 9: Final ECBC 2017Code prepared

10. ECBC: Types and Building covered
ECBC applies to any building that is not in the residential,
agricultural, and industrial sector.
Office building (IT parks)
Government buildings
Hospitals
Retails malls
Hotels, etc 10

11. ECBC Scope
• Mandatory scope covers commercial buildings
 Connected load in excess of 500KW or
 Contract demand in excess of 600KVA
 Recommended for all buildings with conditioned area ˃ 1000m2
• Applies to new construction only
• Building components included
 Building envelope (walls, roofs, windows)
 Lighting ( Indoor and Outdoor)
 Heating ventilation and Air Conditioning (HVAC) system
 Service water Heating and Pumping
 Electrical systems (Power factor, Transformers) 11

12. Features of ECBC
• ECBC had initially set minimum performance standards of
commercial buildings of connected load 500 kW or greater or a
contract demand of 600 kVA or greater. Later, the applicability of
code was modified to 100 kW connected load and 120 kVA contract
demand or greater, for expanding the scope.
• The provisions of the code are not applicable to buildings that do
not use electricity or fossil fuel and to manufacturing systems and
units in a building.
code is applicable to five major areas of energy consumption in
buildings which are:
Building envelope
 Heating, ventilation and air conditioning
 Service water heating
 Lighting
 Electric power and motors
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13. • The code specifies few mandatory requirements and provides two
alternate routes for buildings to comply with it: prescriptive route
and the whole building performance route.
• In the prescriptive route, the building must comply with all the
mandatory measures and prescriptive measures individually. In the
prescriptive route of compliance, trade-off between various parts of
the building envelope is permitted to provide some flexibility to the
designer.
• In the second route of whole building performance, a building
complies with the code as long as it meets all the mandatory criteria
of the code and when the estimated annual energy use of the
proposed design estimated by hourly energy simulation tools is less
than that of the standard design.

14. • BEE with the support from USAID ECO-III Project is working for the
implementation of ECBC. An ECBC User Guide was developed which
explains all the chapters of ECBC in detail. Tip sheets on different areas such
as building envelope, HVAC, lighting, etc. were developed for a better
understanding of ECBC.
• State designated agencies (SDAs) have been formed in different states in the
country for the local implementation of ECBC.
• Once ECBC becomes mandatory at either the central or state level, one can
assume that the implementation and enforcement approach will be similar to
that employed for other, mandatory building codes. The mechanism for
enforcing existing mandatory building codes is well-established in India.
Municipal authorities review all building designs for compliance with the
code. Municipal inspectors must visit all building sites during the
construction phase to ensure that construction matches the approved design.
ECBC IMPLIMENTATION

15. Role of state and other stakeholders
Long-term success of the ECBC will depend heavily on the collaborative roles
various stakeholders would play towards the development, adoption,
implementation, and updating process of building code. These are briefly as under;
• BEE: The proposed role for BEE is as a continued facilitator and hub of
supporting activities both at the Central and State Level. BEE may have to
review its coordination role once the Ministry of Urban Development develops
the ‘National Mission on Sustainable Habitat’ and the Mission becomes
operational for implementation.
• States: Without adoption by the states, the ECBC will continue to be
implemented in the government buildings only, and in a small number of
additional private buildings through voluntary participation. Extensive state
adoption is crucial for spreading wider acceptance of the ECBC in commercial
buildings in the private sector.
• Design professionals: Architects and engineers will need to be directly involved
in efforts to expand knowledge and understanding of ECBC and energy-efficient
buildings.

16. • Academic institutions: Once architects get involved in
professional practice, the time to learn and develop new skills is
scarce, clients dictate project costs and time schedules and
integrating new approaches becomes difficult.
• Technical consultants: Substantial expertise exists in the
international energy efficiency field, related to building design,
technical requirements, education, policy and program delivery.
• Industry: Manufacturers of building materials, lighting, and
MEP systems have the technology that can facilitate in designing
and constructing energy-efficient buildings.

17. CASE STUDY
Potential of energy savings through implementation of Energy
Conservation Building Code in Jaipur city, India
Ankur Tulsyan, Shivraj Dhaka, Jyotirmay Mathur, Jai Vardhan Yadav
AIM:
• This study aims to understand the growth of different types of commercial
buildings (hotels, hospitals, institutes, retail, government offices and private
offices) in the city. It also aims to calculate their energy consumption and
the potential of energy savings possible now when the ECBC has become
mandatory in Rajasthan by Notification from Government of Rajasthan’s
Department of Energy. This methodology could also be used to calculate
energy savings in any other city in India.
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18. Study area:
• The study is focused on the Jaipur city (26.9◦N, 75.8◦E), capital of
Rajasthan.
Collecting building energy consumption data and calculating growth in the
commercial buildings sector-
• Electricity consumption data of all the commercial buildings in the Jaipur
city was collected for the year 2010 from the Jaipur Vidyut Vitran Nigam
Limited (JVVNL), the electricity distribution
• company in the city. Then all the buildings which had a connected load of
more than or equal to 100 kW were identified. This gave the breakdown
of energy consumption by different types of commercial buildings in the
city. This ten year data from 2000 to 2010 gave the growth in energy
consumption in different types of commercial buildings having a
connected load of more than or equal to 100 kW.
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19. Modelling six case studies from the Jaipur city to represent a
sample of commercial buildings in the city
• Six buildings which included a hospital, a hotel, a retail mall, a
government office building, a private office building and an
institute building were identified and modelled in energy
simulation software eQUEST 3-64. They were calibrated with
the help of monthly and yearly electricity bills obtained from
the administration/management at the building and State
Electricity Board Office. To validate the simulation model
mean bias error (MBE) and coefficient of variation root mean
square error (CVRMSE) were calculated. These six buildings
would represent a sample of all commercial buildings which
would come up in future in the city.
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20. Retail mall Private
office
Hospital Hotel Govt.
office
Institute
Building
footprint (m2)
3536 1515 825 1922 2134 9554
Carpet area
(m2)
32787 6600 3952 16214 13564 35549
NO. of floors 2b+g+6 G+3 B+G+3 2B+G+6 B+G+4 B+4
Overall WWR 25.35 26.23 23.69 35.43 34.21 17.6
Wall type Mix of glass
and ACP
cladding
on230 mm
brick
230 mm brick
wall with large
windows
230 mm
thick brick
wall
Glass facade
and230 mm
brick wall
Glass facade
and230 mm
brick wall
230 mm thick
brick
Wall
Roof type 150 mm
concrete
Roof
150 mm
concrete roof
150 mm
concrete
roof
150 mm
concrete
with swimming
pool in a portion
150 mm
concrete roof
150 mm concrete
roof
Glass type 8 mm clear
glass
8 mm blue
clear glass
4 mm clear
glass
8 mm green film
glass
4 mm clear
glass
4 mm clear glass
Overall
LPD(w/sqf)
1.75&0.2 1 1.67 1.3 & 0.1 1.67 1.19
Overall
EPD(w/sqf)
1.65 2 & 1.8 0,8 1.2, 0.8, 0.5 2 0.2
HVAC system
type
VAV (chiller
type Electrical
hermetic
Centrifugal)
2nd floor–
VRV, split Air
conditioner
Window/spli
t air
conditioners
VAV (open
electrical
centrifugal)
CAV system
(centrifugal
Window/split air
Conditioners
Building usage
(timing)
Daytime
09:00–11:00
flow–
daytime1st:24
24 h 24 h 12 h 12 h
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Specifications of the six case studies

21. Result
• The first part of the study gives a breakdown of electricity consumption by
different types of commercial buildings in the Jaipur city.
Sector-wise electricity consumption of buildings with connected load
above 100 kW, during the year 2009–2010 in Jaipur city.
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22. • The comparison of the simulated energy consumption of the six
buildings with their actual energy consumption. MBE and CV
(RMSE) of different simulated models can also be seen. All the
models are acceptable as the errors are in within permissible
limit. It can be seen that the simulated energy consumption in the
institute building is having best match. Sector-wise electricity
consumption of buildings with connected load above 100 kW,
during the year 2009–2010 in Jaipur city. with the actual energy
consumption, whereas, hospital building is having worst match
and had 19.17% of deviation on the basis of annual energy
consumption with 17.94% root mean square error, 19.16% mean
bias error.
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23. 23
Building type Simulated
annual
energy
consumption
kWh (2010–
2011)
Actual
energy
consumption
in kWh
(2010–2011)
MBE (%) CV(RMSE) Conclusion
Retail mall 1,861,600 1,684,564 10.5 9.83 Model is
acceptable
Private office 2,224,300 1,967,342 13.06 12.22 Model is
acceptable
Hospital 1,061,800 891,021 19.16 17.94 Model is
acceptable
Hotel 410,240 365,008 12.39 11.6 Model is
acceptable
Government
office
2,549,200 2,276,323 11.98 11.21 Model is
acceptable
Institute 3,003,600 2,721,500 10.36 9.7 Model is
acceptable
MBE and CV (RMSE) of the case studies

24. 24
Retail
mall
Private
office
Hospital Hotel Govt.
office
Institute
Baseline energy
consumption
1861600 2224300 1061800 410240 2549200 3003600
Wall U-value 4.33% 4.70% 2.98% 3.09% 0.54% 0.43%
Roof U-value 0.14% 5.11% 0.58% 8.57% 4.22% 0.47%
Roof reflectivity 0.05% 3.03% 1.24% 2.96% 3.05% 0.04%
Glass U-value 1.62% 0.07% 0.20% 0.04% 0.25% 0.52%
Glass SHGC 2.42% 2.22% 5.10% 0.27% 5.32% 0.83%
Coefficient of
performance
17% 34.25% 11.15% 10.06% 7.42% 4.72%
Economizer 1.72% 2.20% 1.12% 1.01% 0.05% 0.02%
Envelope total 8.77% 13.35% 15.04% 13.12% 14.22% 1.71%
Envelope + lighting 17.63% 15.39% 34.89% 27.31% 26.54% 13%
Envelope +
lighting+ HVAC
(ECBC case)
31.98% 33.03% 42.25% 34.43% 32.11% 17.37%
EPI reduction
(kWh/m2/y)
67.09 127.61 113.54 100.94 44.07 2
Energy savings through different ECMs in case studies.

25. • The final part of the study included extrapolating these savings for all
the different types of commercial buildings over a period of five years
and calculating energy that could be saved during that period.
CONCLUSION:
• The energy saving potential with ECBC is in the range of 44 kWh/m2/y
in Government buildings as lowest effect, whereas in case of the private
office, it is estimated to be 128 kWh/m2/y.
• Percentage energy savings with ECBC compliance in these buildings
vary from 17% in the case of institutional building to 42% in case of
hospitals.
• Envelope and HVAC are major concern area in hotel buildings.
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26. REFERENCES
• Ankur Tulsyan, Shivraj Dhaka, Jyotirmay Mathur, Jai Vardhan Yadav. Potential of
energy savings through implementation of Energy Conservation Building Code in
Jaipur city, India. s.l. : Energy and Buildings, 2012.
• Bureau of Energy Efficiency, Energy Conservation Building Code . New Delhi,
India : Bureau of Energy Efficiency, 2007.
• Energy Conservation Buildind Code User Guide. New Delhi, India : Bureau of
Energy Efficiency , 2009.
• Energy Conservation Building Code of India, Bureau of Energy Efficiency, New
Delhi, India. 2017.
• Jyotirmay Mathur, Vishal Garg and Vijeta Jangra. Energy Conservation Building
Code In India: Status, Issues And Opportunities. s.l. : ASME 2010 4th International
Conference on Energy Sustainability, 2010.
• Satish Kumar, Ravi Kapoor, Rajan Rawal, Sanjay Seth and Archana Walia.
Developing an Energy Conservation Building Code Implementation Strategy in
India. 2010.

27. Thank You…