1. What is Energy Efficiency?
Vientiane, Lao PDR
August, 2011
An introduction to Energy Efficiency
Energy Efficiency Department
Sunlabob Renewable Energy Ltd

2. Energy Efficiency - definition
Energy efficiency is the reduction of the amount of energy
required to provide products and services.
Energy efficiency is
doing the same or
more with less. “Its wringing the most
out of the energy that
we already have.”
Amory Lovins
Rocky Mountain Institute
2

3. Energy Conservation - definition
Energy conservation is directly related to energy efficiency. It
refers to efforts made to reduce energy consumption.
• It can be achieved by simply switching off
a light when not in use.
• It is directly related to people’s habits and
behavior.
• It can also be achieved through passive
building strategies that reduce the need
for electricity.
3

4. Energy Policy
Energy efficiency together with energy conservation are the basis
of a sustainable energy strategy.
There is no sense in
producing energy
that is going to be
wasted by
inefficient use.
4

5. Why Save Energy?
• Energy production and consumption is
directly linked to climate change. IEA
• Reduce energy cost to consumers.
• Reduce environmental impacts e.g. dams.
• Reduce energy infrastructure costs and
materials.
• Energy security; lessen dependence on
imports.
5

6. How much energy can be saved?
Long-term energy saving from improvement in energy efficiency, OECD-11, 1973-2004
6

7. The Energy Audit
Electrical consumption by
appliance per year
Air
conditioner
Lights
22.3% 39.71%
Fans 1.0% Before you take ANY
Industrial
Equipment Computers action, find ALL your
20.20% Kitchen 8.1%
2.7%
Other office opportunities for saving
Water 1.1%
heater 4.9% energy.
A commercial example
7

8. Efficient Lighting
70-90% savings can be achieved through efficient lighting. It also
lasts much longer, uses less material, and produces less waste
heat.
=
1 LED
50 Incandescent bulbs
For example, one LED bulb lasts 50 times longer than a conventional
incandescent bulb and uses 80% less electricity.
8

9. Office equipment
Office equipment improvement
•Optimizing energy usage of computer systems, printers,
photocopiers, etc.
•Software controls can put devices on standby mode.
A Laptop uses 3x less N computing uses a single host
energy than a desktop computer accessed by multiple users
computer
9

10. Passive Solar solutions
• Use natural drying for clothes
instead of electric drying: 85%
savings
• Use solar water heaters instead of Natural drying
electric water heaters: 80%
savings
Solar water heater
• Cool roofs reflect the heat of the
sun.
10

11. Industrial applications
Motors
Replace motors and pumps with
efficient and properly sized systems.
5 – 10% savings
Electricity distribution
Implementing capacitor banks can
increase the power factor.
Control systems can improve
efficiency.
Up to 20% savings
11

12. Monitoring
Monitoring & Performance Evaluation
•The benefits of Energy Efficiency can be measured by
monitoring devices.
•This adds to awareness of consumption.
•Gives details of peaks and valleys in consumption.
Power meter Power meter
12

13. Changing Behavior
•Energy conservation
has the greatest
energy saving potential
at the least cost.
•Users can change
habits to save energy.
•Savings of about 10-
A signage board placed near fan switch
15 % of the total bill in
most cases.
13

14. Example of an Inefficient house
The roof receives the direct
heat from the sun. This heat is
transferred to the living space.
Large air Heat is created
conditioner from inefficient West and
is needed to lights and east sun
cool house. equipment. enters house
through
unshaded
windows.
14 Environmental stresses on buildings

15. An efficient house
A cool roof reflects Attic heat is
heat from the sun. vented.
Very little heat is
transferred to the
attic.
Cellulose insulation
Only a small Efficient lights
efficient air and equipment.
conditioner is
needed to cool West and east windows
Cross-ventilation are shaded from the sun.
the house.
Improves comfort
Element of energy efficiency.
15

16. A house in Florida
A study of two similar
houses in Florida.
The top house is the
control and the bottom
is improved with:
•a white roof
• ceiling insulation
•High efficiency air
conditioners
etc.
From the Florida Energy Center.
16

17. Results of Florida house study
The results are a dramatic energy savings of The percentage contribution to energy savings
70% from energy efficiency alone. from various measures used in the study.
See the 1998 project report
17 at www.fsec.ucf.edu

18. Business Example
Phu Bia mining camp in
Laos was audited by
Sunlabob.
Houses, factories, and
offices were included.
Energy savings of 40
percent was realized.
18

19. Investment
COST ITEM DESCRIPTION PRICE SAVINGS PAYBACK
PERIOD
Conservation Turn off lights and none depends immediate
A client can choose
equipment when not in
the level of
FREE
use
Building orientation Long side of building
facing south
none ? daily
investment;
Vegetation Use tree to shade Planting and Time for tree
no initial investment
windows on east and
west side
maintenance to grow
with a short payback
LOW
Cool roof Use light colored roof
material to reflect
sunlight
Paint for
existing roofs
20% of
aircon bill
About one
year period, to high initial
investment with a
Lighting Install efficient lighting 20
long payback period.
MEDIUM
Window shading Use overhangs and
louvers to shade
windows
Air conditioning High efficiency air 30%
conditioners
Solar cells Photovoltaic solar cells
HIGH
19

20. Why is our world not more energy efficient?
• Lack of understanding of energy efficiency.
• Initial investment costs show benefits only
over the long term.
• There is a lack of regulations. Energy
efficient choices need to be rewarded.
• Availability of energy efficient products is
not widespread.
20

21. Particular Benefits for Laos
• Reduce reliance on Imports of Electricity
imported electricity 1600,00
during the dry season. 1400,00
• Reduce the number of 1200,00
dams constructed. 1000,00
Electricity (GWh)
• The more energy saved,
800,00
the more can be sold to
600,00
neighbors.
400,00
200,00
0,00
1990 1995 2000 2005
Imports and consumption of electricity
21 in Laos

22. Further Benefits
• Energy Efficiency preserves the
natural environmental.
• More land available for
agriculture and recreation.
• Green tourist industry will be
enhanced.
• A market for energy efficient
products is developed in Laos
• Laos could becomes leader in
Energy Efficiency innovation in
SE Asia.
22

23. Questions
Time for discussion.
Sunlabob Renewable Energy Ltd
PO Box 9077, Vientiane, Lao PDR - Tel: (+856 21) 313874 - Fax: (+856 21) 314045
contact@sunlabob.com www.sunlabob.com