A new report from the U.S. National Renewable Energy Laboratory (NREL) says PV module lifetime extensions should be prioritized over closed-loop recycling to reduce demand for new materials.
Researchers assessed the impact on new material demand with different module lifetimes from 15 to 50 years. They also examined closed-loop recycling, and assumed that the U.S. will have 1.75 terawatts of cumulative PV installed capacity by 2050.
Modules with 50-year lifetimes could reduce new material demand by 3% through lower deployment, compared to a 35-year baseline scenario. Fifteen-year modules would require an additional 1.2 TW of replacement modules, which would increase new material demand and waste unless over 95% of the module mass was closed-loop recycled.
To date, no PV technology has reached near the 95% level of closed-loop recycling for all component materials. Thus, manufacturing longer-lasting PVs is the more eco-friendly choice.
Related Stories
| Nov 5, 2013
Oakland University’s Human Health Building first LEED Platinum university building in Michigan [slideshow]
Built on the former site of a parking lot and an untended natural wetland, the 160,260-sf, five-story, terra cotta-clad building features some of the industry’s most innovative, energy-efficient building systems and advanced sustainable design features.
| Oct 28, 2013
Packard Foundation’s headquarters receives ILFI Net Zero certification
The Packard Foundation’s 49,000-sf headquarters recently achieved Net Zero Energy Certification through the International Living Future Institute (ILFI), making it the largest such building in the world.
| Oct 21, 2013
University of Queensland’s net-zero building features biomimicry-based design
University of Queensland’s Global Change Institute (GCI) building in Australia showcases on-site solar energy sources, biomimicry-based design features, and the first structural use of low-carbon concrete in the country.
| Oct 21, 2013
ASHRAE/IES publish 2013 Energy Standard
Major changes to requirements regarding building envelope, lighting, mechanical and the energy cost budget are contained in the newly published energy standard from ASHRAE and IES. ANSI/ASHRAE/IES Standard 90.1-2013, Energy Standard for Buildings Except Low-Rise Residential Buildings, incorporates 110 addenda, reflecting changes made through the public review process.
| Oct 18, 2013
Meet the winners of BD+C's $5,000 Vision U40 Competition
Fifteen teams competed last week in the first annual Vision U40 Competition at BD+C's Under 40 Leadership Summit in San Francisco. Here are the five winning teams, including the $3,000 grand prize honorees.
| Oct 18, 2013
Cities may be more capable of driving sustainability than nations, experts say
With countries not tackling climate change aggressively, cities are in the best position to drive increased sustainability.
| Oct 14, 2013
Computer simulation aids design of Vermont ski area net-zero lodge and fitness center
The Craftsbury (Vermont) Outdoor Center has broken ground on a new activity lodge and fitness center. An energy modeling computer simulation was used to optimize solar orientation, insulation values, and the form of the building.
| Oct 10, 2013
Carnegie Mellon study looks at impact of dashboards on energy consumption
A recent study by Carnegie Mellon took a look at the impact of providing feedback in an energy dashboard form to workers and studying how it impacted overall energy consumption.
| Oct 7, 2013
Geothermal system, energy-efficient elevator are key elements in first net-zero public high school in Rhode Island
The school will employ a geothermal system to heat and cool a portion of the building. Other energy-saving measures will include LED lighting, room occupancy sensors, and an energy-efficient elevator.
| Oct 4, 2013
Sydney to get world's tallest 'living' façade
The One Central Park Tower development consists of two, 380-foot-tall towers covered in a series of living walls and vertical gardens that will extend the full height of the buildings.