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Sustainability and green engineering
1. Sustainability & Green Engineering
Benefits to Jamaica Urbanism
Keroma Bernard
University of Technology, Jamaica
Industrial Technology Seminar
September 30, 2016
www.bernardsustainable.com
2. Keroma Bernard
Director & Principal Engineer
Bernard Sustainable Consulting
www.bernardsustainable.com
• A licensed and registered Professional
Engineer/PE with over 12 years of
progressive experience spanning
engineering design, environmental
consulting, auditing, ecological
architecture and master planning
• Served numerous sectors including
commercial, residential, hospitality,
Industrial and agro industrial facilities
through designing, energy auditing,
project management, commissioning
and environmental compliance.
• B. E : Industrial Technology | Construction
M.Eng : Environmental Engineering
Ph.D Candidate: Hydrology & Water
Resource Engineering
6. Today You’ll Learn
1 Engineering a Greener World
2 Production
3 Lifecycle Modeling
4 Local Context & Applicability
5 Principle of Green Engineering
6 Local Research
7 Methods
8 Analysis
9 Recommendations
10 Conclusions
16. Presentation ContentsLocal Context and applicability
What is Green engineering…??
It is design, commercialization and use of
process & products that are feasible and
economical. While minimizing:
*Risk to human health and environment.
*Generation of pollution at source.
18. Presentation ContentsPrinciples of Green Engineering:
1. Engineer processes and products holistically,
use systems analysis, and integrate
environmental impact assessment tools.
2. Conserve and improve natural ecosystems
while protecting human health and well-being
3. Use life-cycle thinking in all engineering
activities
4. Ensure that all material and energy inputs and
outputs are as inherently safe and benign as
possible
5. Minimize depletion of natural resources
19. Presentation ContentsPrinciples of Green Engineering:
6. Strive to prevent waste
7. Develop and apply engineering solutions,
while being cognizant of local geography,
aspirations, and cultures
8. Create engineering solutions beyond current
or dominant technologies; improve, innovate
and invent (technologies) to achieve
sustainability
9. Actively engage communities and
stakeholders in development of engineering
solutions
21. Presentation ContentsApproach
1. Phase 1- The outdoor climatic data was
collected from Jamaica Meteorological
Office (MET Office)
2. Phase 2- Drawings and existing energy
profile on both buildings were collected
3. Phase 3- Indoor environment survey of both
buildings conducted
4. Phase 4- Data Analysis
5. Phase 5- Present findings Publication
22. Presentation ContentsResearch Objectives
The objectives of this research is to:
1. Investigate the occupants comfort level
and the intensity of SBS symptoms of
tropically acclimatized subjects in real
offices.
2. Model and use meteorological data
available to take advantage of the
microclimate.
3. Develop basic guidelines to better the
indoor environment and improve energy
efficiency of the offices been study.
23. Presentation ContentsBackground and Significance
Global warming is already taking place and
has become the biggest challenge of our
time. The challenge is to find ways for the
world to switch from a path of increasing
emissions to a path of more high advanced
technologies where the majority of the
Green House Gas (GHG) emissions are
eliminated.
24. Presentation ContentsBackground and Significance
Locally!!! Vision 2030, EE Standards
Sustainable Development
“Sustainable development meets the
needs of the present without compromising
the ability of future generations to achieve
their own needs achieve needs”
Brundtland 1987, UN World Commission on Environment and Development
25. Presentation ContentsBackground and Significance
Sustainable Development
SD
Space
Time
System quality
Over what space is SD to be achieved?
Over what time is SD to be achieved?
What system quality is SD to be achieved?
26. Presentation ContentsBackground and Significance
Major Developments of the 1990’s
1. Globalization and market economy
2. Information technology and
telecommunications
3. World Wide Web and e-commerce
4. Environment and sustainability
5. Science and technology capability as an
instrument of economic competitiveness
27. Presentation ContentsKey Issues in the Built Environment
Global Context and Key Issues in the Built Environment
The Triple Bottom Line of Sustainability
28. Presentation ContentsKey Issues in the Built Environment
Environmental objectives
1. maximise energy efficiency
2. conserve resources
3. Minimise pollution/damage to the environment
4. conserve wildlife habitats
Economic objectives
1. support local economy
2. provide employment opportunities
Social objectives
1. improve the quality of life
2. promote social equity
33. Presentation ContentsThermal Comfort
1. Thermal comfort is defined as the
condition of mind that expresses
satisfaction with the thermal environment
according to (ASHRAE Standard 55-92). As
such, it will be influenced by personal
differences in mood, culture and other
individual, organizational and social
factors. [Rene Tchinda 2010]
36. Presentation ContentsThermal Comfort
Why is thermal comfort important?
Because thermal comfort is
psychological, it may affect our overall
morale. occupants complaints may
increase, productivity may fall and in
some cases people may refuse to
work/function in a particular
environment.
37. Presentation ContentsAssessment
Summary of the instruments used and existing indoor
parameters of both building
Indoor
Parameters
Half Way Tree
(HWT)
Duke Street
(DS)
Temperature 22.5 0C 25 0C
Wind Speed Velocity 0.12 m/s 0.6 m/s
Relative Humidity 55-65% 60-66%
Time of Measurement 2:00PM 2:00PM
Anemometer &
Thermometer
38. Presentation ContentsAssessment
Thermal Sensation
ASHRAE Scale
(Fangers Scale)
Cold Cool Slightly Cool Neutral Slightly Warm Warm Hot
-3 -2 -1 0 1 2 3
Assessment of Humidity
Humidity Scale
Very Dry Dry Slightly Dry Neutral Slightly Humid Humid
Very
Humid
1 2 3 4 5 6 7
Assessment of Freshness (IAQ)
Freshness Scale
Much Too
Stuffy Too Stuffy
Slightly
Stuffy Neutral Slightly Fresh Too Fresh
Much
Too
Fresh
1 2 3 4 5 6 7
Assessment of Odor (IAQ)
Odor Scale
Strong
Odor
Moderate
Odor Slight Odor No Odor
Very Strong
Odor
Overpowering
Odor
1 2 3 4 5 6 7
Assessment of Air Movement
Air Flow Scale
Much Too
Still Too Still Slightly Still Just Right Slightly Breezy Too Breezy
Much
Too
Breezy
1 2 3 4 5 6 7
40. Presentation ContentsSBS & IAQ
Sick building syndrome is a situation in
which occupants of a building experience
some form health matters that seem to be
relate to duration spent in the premise
without invoking any specific illnesses. This
could further result in work distractions that
culminate in absenteeism (Preller et al,
1990).
42. Presentation ContentsRecommendations
Architectural Strategic Design
The success of energy efficient
building design depends on
understanding the interactions
between people, the building fabric
and services.
BUILDING SYSTEMS OCCUPANTS
ENERGY
PERFORMANCE
from field studies x 10 variations
X 2.5
X 5 from modeling X 2 deduced
44. External
sun-shading:
Only part of
tranmission and
absorption heat
becomes heat
gain
Internal sun-
shading:
All of the heat
absorbed by
shading device
and transmitted
through it
becomes heat gain
Convection
Transmission
Reflection
Reflection
Convection
Transmission
What is the difference between internal and external
sunlight screening methods?
Recommendations
52. Conclusion Eco-architecture & Urbanism
There are some simple and complex
assessment methods, technology and
design approaches to energy savings and
to better urban environment comfort, some
of which has been outlined in this
presentation.
1. Understanding micro-climate
2. The building is there to serve the
occupants and their activities.
3. Reduce the Urban Heat Island Effects
53. References
(1)The World Commission on Environment and
Development. Our Common Future; Oxford
University Press: New York, 1987.
(2) Graedel, T. E.; Allenby, B. R. Design for
Environment; Prentice Hall: New York, 1997
(3)Allen, D. T.; Shonnard, D. R. Green Engineering:
Environmentally Conscious Design of Chemical
Processes; Prentice Hall: New York, 2001.
