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Net zero energy buildings

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by

Jingchien Hsu

on 14 July 2014

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Transcript of Net zero energy buildings

Net zero energy buildings
ENERGY CONSCIOUS DESIGN
introduction
CONCLUSION
zero energy building is achievable
reasonable way to sustainable future
example-Orchid House
Jing-Chien Hsu
Sarah Hamdy

Location :Taiwan
Geography: 36,193 km2
Population: 23,392,036
Climate condition: tropical climate
hot, humid

Orchid house

Due to high urban density and
also the significantly higher
housing rent and price,
people build up metal sheet
cabins on rooftops, in order
to gain extra living space.

Metal structure of cabin
traps heat inside the building.

Motivation

1.Taiwan is the second largest exporter of orchids.
2.orchids represent elegance, is the attitude of living.
3. House is like a plant.

Why orchid house?

House design



Material : POLLI-Brick™

Thermal mass

Wall filled with a variety of vegetation
Moderate the temperature
Clean and cool the air interior

Green core

reference: Ministry of the interior
http://www.moi.gov.tw/
Reference :Orchid house http://sde.tw/
http://lowestc.blogspot.com/
Reference :Orchid house http://sde.tw/
Reference :Orchid house http://sde.tw/
Reference: Miniwiz http://www.miniwiz.com/miniwiz/en
orchid house http://sde.tw/

Reference: orchid house http://sde.tw/

1-Motivation
2- Introduction
3- Zero Energy building design
4- Example
5-Conclusion

Overview





 significant contribution to reducing CO2 emissions while conserving valuable energy resources.

MOTIVATION

significant contribution to reducing
CO2 emissions while conserving
valuable energy resources.
[Source: U.S. Department of Energy Buildings Energy Data Book, Sept. 2008]
[DG Energy, 2012
DEFINITION
A net-zero energy (NZE) building is one that
relies on renewable sources to produce as much energy
as it uses, usually as measured over the course of a year. 

INTRODUCTION
Net Zero
Site
Energy
Net Zero
Source
Energy
Net Zero Energy
Costs
Net Zero Energy
Emissions

Zero Energy Building for Cairo
Orientation
Shape
Windows
Thermal mass and materials
Envelop and Insulation
Ventilation
Heating and cooling
Onsite Renewables
Energy Efficiency


ZERO ENERGY BUILDING DESIGN

Dry, hot climate: little rain and a huge daily temperature range
mean annual temperature is 22°C
mean relative humidity for an average 35.2%

CLIMATE

main focus provide a cooling system,
which normally uses natural ventilation, shading and
other traditional, passive techniques


ENERGY CONSUMPTION

MAXIMIZING NATURAL VENTILATION
North,north west orientation is the
orientation for optimum natural ventilation.








ORIENTATION OF THE BUILDING

MAXIMIZING ELECTRICAL ENERGY PRODUCTION
Southward tilted roof.
MINIMIZING SOLAR GAIN
optimum sun control is orientation north-south

ORIENTATION OF THE BUILDING

BUILDING ORIENTATION

Surface to the environment
Simple design
Interior shading










BUILDING SHAPE AND WINDOWS

High thermal mass can ensure the comfort for 35.6% of time

THERMAL MASS

High mass
Interior surfaces like stone: feels naturally cool and reduces day-to-night temperature swings

THERMAL MASS

VENTILATION

SHADING

HEATING AND COOLING

PHOTOVOLTAIC SYSTEM
22% covered by Electric chillers
(COP = 1.5)




HEAT PUMP
78% of cooling demand to be covered
by Geothermal heat pump
(COP = 3.0)


ONSITE RENEWABLES



“…there is a great potential to achieve ZEB’s in Egypt,
in a convenient and manageable manner.”

CONCLUSION

14/07/2014
reference: Net Zero energy buildings, by Steven Winter Associates, Inc.
reference: http://geonet.icarda.cgiar.org/geonetwork/data/regional/West_Asia/Maps/Prec/JPG/map066Relative-precipitation-change-2010-2040-current-climate-GHG-scenario-A2-November.jpg
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
reference: Climate Responsive Architecture and Planning, Saif Rashid and Ismail Khater
Full transcript