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
| Sep 15, 2014
Sustainability rating systems: Are they doomed?
None of the hundreds of existing green building rating systems is perfect. Some of them are too documentation-heavy. Some increase short-term project cost. Some aren’t rigorous enough or include contentious issues, writes HDR's Michaella Wittmann.
| Sep 8, 2014
First Look: Foster + Partners, Fernando Romero win competition for Mexico City's newest international airport
Designed to be the world’s most sustainable airport, the plan uses a single, compact terminal scheme in lieu of a cluster of buildings, offering shorter walking distances and fewer level changes, and eliminating the need for trains and tunnels.
| Sep 7, 2014
USGBC + American Chemistry Council: Unlikely partners in green building
In this new partnership, LEED will benefit from the materials expertise of ACC and its member companies. We believe this has the potential to be transformational, writes Skanska USA's President and CEO Michael McNally.
| Sep 3, 2014
New designation launched to streamline LEED review process
The LEED Proven Provider designation is designed to minimize the need for additional work during the project review process.
| Aug 25, 2014
Glazing plays key role in reinventing stairway design
Within the architectural community, a movement called "active design" seeks to convert barren and unappealing stairwells originally conceived as emergency contingencies into well-designed architectural focal points. SPONSORED CONTENT
| Aug 12, 2014
Vietnam's 'dragonfly in the sky' will be covered in trees, vegetation
Designed by Vietnamese design firm Vo Trong Nghia Architects, the building will be made up of stacked concrete blocks placed slightly askew to create a soft, organic form that the architects say is reminiscent of a dragonfly in the sky.
| Jul 30, 2014
German students design rooftop solar panels that double as housing
Students at the Frankfurt University of Applied Sciences designed a solar panel that can double as living space for the Solar Decathlon Europe.
| Jul 28, 2014
Post Tower Wins CTBUH 10-Year Award
The 10 Year Award recognizes proven value and performance in a tall building, across one or more of a wide range of criteria, over a period of 10 years since its completion.
| Jul 24, 2014
MIT researchers explore how to make wood composite-like blocks of bamboo
The concept behind the research is to slice the stalk of bamboo grass into smaller pieces to bond together and form sturdy blocks, much like conventional wood composites.
| Jul 17, 2014
A harmful trade-off many U.S. green buildings make
The Urban Green Council addresses a concern that many "green" buildings in the U.S. have: poor insulation.