NZEB
(Net-Zero Energy Buildings)
Done by: Dalal Alhourani 201210747
Introduction of the world’s energy is consumed by buildings, 21%of 40% greenhouse gas emissions come from buildings and 40% energy savings can be realized through intelligent building automation. Our goal for this architectural design was to encourage our people to pursue systematic and interdisciplinary solutions for . achieving net-zero building design (NZEB) Net-zero energy buildings are buildings with zero net energy consumption, meaning the total amount of energy used by the building on an annual basis is roughly equal to the amount of renewable energy elsewhere. These buildings consequently contribute less overall greenhouse gas to the atmosphere than . similar non-ZNE buildings
:To create a zero energy building Step1: increase energy efficiency Efficient building construction Efficient systems and appliances Operations and maintenance Change in user behavior
Step2: address remaining needs with on-site renewable energy generation
:ZEB concepts Net zero site energy-
Net zero source energyNet zero energy costsNet zero energy emissions-
:Net zero site energy building A building that generates (at least) as much energy as it uses on.site. This is the most common use of the “net-zero� term
:Net zero source energy building A building that produces (at least) as much energy as it consumes when compared to the energy used to both generate and deliver the energy to the site from a remote point of generation (such as a .power plant), plus the energy consumption on the site This definition factors in transmission losses and the other .inefficiencies
:Net zero energy costs buildingA building that sells more power to the utility than t purchase, .utilities generally charge more than they pay for power
: Net zero energy emissions building A building that generate (at least) as much renewable energy as it consumes from non-renewable sources. This energy can be produced on-site or purchased. Buying renewable energy credits .to offset non-renewable energy consumption counts
Examples of net-zero energy buildings The four winning projects of HOK Challenges Designers to Target Net-Zero Energy represent truly integrated design solutions,� said Landreneau. “More than just building forms and systems, they include original designs for envelope and shading components that collect storm water and solar .�energy while protecting the buildings from solar heat gain 1st Place: Solar Los Angeles, California The design for this mixed-use residential, commercial, and retail project maximizes the energy output from photovoltaic integrated into the . structure Inspired by the large, commercial installations scattered across the Mojave Desert, the team chose concentrated photovoltaic (CPV) systems that require a smaller PV area while providing efficiency levels of up to 40 percent. Heat generated by the CPV system can be used for solar water heating and geothermal heating/cooling. Because Southern California is rich in sunshine but poor in water resources, the secondary focus on this design is on water use and .reuse
2nd Place: Open Source Closed Loop St. Louis, Missouri This small office building in St. Louis achieves net-zero energy use through several strategies focused on modal .specificity and systematic adaptability Integrating the systems minimizes energy loads and produces renewable energy. An adaptable boundary layer manages heat transfer, acting much like human skin. In warmer conditions, the skin relaxes and expands its surface area, triggering more convective heat loss. In cooler temperatures, the skin tightens or “bristles,� . creating a thermal buffer to minimize heat loss 3rd Place: Feedback Hydronics St. Louis, Missouri Through research, testing and consultation with local engineers, the team developed a fully integrated hydronic heating and cooling system for a St. Louis
.culinary school and restaurant The system allows for feedback and self-correction while it adjusts its operations according to differences between actual and desired output. A fully integrated solar thermal skin and structure are embedded with the hydronic closed-loop system to minimize loss and maximize gain. Secondary systems include a subterranean labyrinth, an anaerobic digester and an . electronic chiller
Honorable Mention: D-Breath Beijing, China The design goal for this Beijing medical office building . was to address the city’s massive air pollution problem An intelligent, charcoal-brick framework and infill system incorporate smart modules that are based on optimal orientations for sun and wind. Solar heat is harvested for energy exchange and natural ventilation strategies are fully integrated into the structure and envelope. D-breath, which features an infill system tailored to the specific geographic location to maximize .the performance, can be located anywhere in the world
Features of a net-zero :home
:Zero energy strategies
?Why NZEB .Reduces energy consumption .Reduces greenhouse gases (carbon emissions)& global warming .Reduces dependence on fossil fuels .Reduces ozone depletion .Reduces climate change .Protect our environment for future generations
?Methodology
:Process of construction
Conclusion With the advancement in renewable technology, Net-Zero Energy buildings are the future. Many governments have framed zero energy building laws. Few governments are also providing subsidies to individuals and organizations for creating Zero Energy Buildings. But the goal of zero energy buildings would not be fulfilled till the time all the people don’t understand their responsibility and .contribute towards reducing energy consumption