1. ZERO ENERGY
BUILDINGS
Tony Brick
Suresh Gurung
Hyojung Lee

2. Introduction
 Researching definition of zero energy building
 Find new technologies
 Looking for example zero energy buildings
 Compare and analyze solutions
 Summary of the results
 Suggestions for Finland
 Conclusion

3. Definition
Different definition all over the world
Similar standards and categories to analyze buildings
but still different meaning of each definition by
purpose of the buildings and type of the buildings
Confuse consumer
Combining the analysis of the definition which will
have more clear idea of energy consuming efficiency

4. Examples all over the world
Climate
Geographical
Purpose and aim
features
Differences
Marketing and
Living
investing
style
atmospheres
Applying Development

5. Canada

6. Riverdale NetZero Project
Canada
 Location of the project
 Edmonton Riverdale
 Technology used
 Thermal water tank
 Photovoltaic, heat collecting panels
 Heat recovery system of basic housing system
 Energy performance
 Annual energy use 61.51kWh/m²
 Annual energy production 63.01kWh/m²

7. http://www.sabmagazine.com/blog/2009/06/21/riverdale-net-zero-project/

8. New Zealand
 Poor attitude to clean housing
 Poor housing quality
 Health and wellbeing
 respiratoryillnesses - 50 people a day to hospital
 180,000 sick days a year
 Cut household power bills with improved insulation
and double glazing
 Water wastage – enough to fill 9,200 Olympic
swimming pools

9. Little Greenie

10. Little Greenie
 Location of the project
 Golden Bay Hideaway, Takaka
 Technology used
 Photovoltaic panels
 Thermal mass
 Solar water heating system
 Other feature
 Low maintenance
 Ease of construction
 Energy performance
 284 kWh/year, normal for NZ is 3040 kWh/year

11. Zero Energy Building in U.S.A.
 U.S.A. is adopting more the zero net site building
followed by LEED (Leadership in Energy and
Environmental Design). In those buildings the
amount of energy provided by on-site renewable
energy sources is equal to the amount of energy
used by the building.

12. Example dwellings of zero energy building in U.S.A.
 Net Zero Energy School Building, Los Angeles, U.S.A.
 Holcim Silver Award 2011 North America
 http://www.holcimfoundation.org/T1381/A11NAsiUS.htm

13. School Building Zero Energy performance
Gross Net Walls, General Students Total Renewable Net Energy
Building Building Shafts, Classrooms Capacity Energy Energy Use
Area Area Open area Usage Supply
31,600 sq. 27,905 sq. 3,695 sq. 16 500 105,248 105,248 0 kWh
ft. ft. ft. kWh per kWh per per year
year year
(source:
photvoltai
c panels)

14. Day lighting and Thermal Buoyancy of a Building

15. Daylight Classroom

16. Zero Carbon Emission Building, St. Louis, Missouri, U.S.A.
 Largest zero emissions building in North America
 www.netzerocourt.com

17. Zero Carbon Emission Building Performance
Building Daylight Parking Photovo Solar Carbon Energy Payback Building’
Area Parking Capabili ltaic Thermal Reducti Efficicen Time s Energy
ty Panels Tubes on cy Use
Intensity
(EUI)
15,850 1650 sq. 438 4,810 1,390 76 % 73% 10-12 235.7
sq. m. m. (with sq. m. sq. m. years KTBus/s
solar q. m.
roof)

18. HVAC System

19. Latest Technology in U.S.A.
 Day lighting with minimum glare
 Vertical sun tunnels and ventilation chimney
 Natural ventilation and thermal buoyancy
 Solar Skin
 Solar access with large roof area
 Low U-value roof and wall insulation
 Phase change material heating + cooling units
 PV panels

20. Summary of examples and comparing
Riverdale NetZero Little Greenie Zero CO2 emission
Project (Canada) (New Zealand) office building
(Untied states)
Building type Residential Residential Office
Technology used Thermal mass Thermal mass Photovoltaic panels
PV, heat collecting PV panels Solar thermal tubes
panels Passive solar
On grid. heating
Good aspects Urban area Lower maintenance Low CO2 emission
Not only energy but Ease of
all of resources construction
Affordability Affordability
Weak aspects Still on the grid Limit of size and Large space for
building style solar panels
Affordability

21. Fit to Finland
 General situation in Finland
 20% of reduction of energy usage by 2020 (EU)
 Change of legislations and Building Code
 New technologies and experienced experts from
neighbour countries
 Difference with other countries
 Climate
 Marketing

22. Building Energy Efficiency Rating System

Energy Energy
Rating
Generated Consumed
Riverdale, Canada (kWh/m2) 63 61.5 102 % Zero Energy
Little Greenie, New Zealand (kWh/year) 3671 3188 115 % Plus Energy
Kuopas, Finland (kWh/year) 85 600 101 700 80 % Nearly Zero

23. Building Energy Efficiency Rating System
 Easy to understand & use
 Universal
 Provides target
 Ongoing and regular assessments
 Flexible and adaptable
 Manageable

24. Conclusion
 High efficiency envelopes
 Heat recovery systems
 Combining energy generating technology
 Use nature aspects as much as possible
 Heating, cooling, lighting and ventilation
 Encouraging and marketing efficiently

25. Thank you
 References
 Group report of the project
 Photos
 http://www.sabmagazine.com/blog/2009/06/21/riverdale-net-zero-project/
 http://netzerocourt.files.wordpress.com/2010/10/pathtonetzerocourt2.pdf
 http://www.holcimfoundation.org/T1381/A11NAsiUS.htm