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$100M donation powers decade-long moonshot to create solar satellites that beam power to Earth
It sounds like a plan concocted by a supervillain, if that villain’s dastardly end was to provide cheap, clean power all over the world: launch a set of three-kilometer-wide solar arrays that beam the sun’s energy to the surface of the Earth. Even the price tag seems gleaned from pop fiction: one hundred million dollars. But this is a real project at Caltech, funded for a nearly a decade largely by a single donor.
The Space-based Solar Power Project has been underway since at least 2013, when the first donation from Donald and Brigitte Bren came through. Donald Bren is the chairman of Irvine Company and on the Caltech board of trustees, and after hearing about the idea of space-based solar in Popular Science, he proposed to fund a research project at the university — and since then has given more than $100 million for the purpose. The source of the funds has been kept anonymous until this week, when Caltech made it public.
The idea emerges naturally from the current limitations of renewable energy. Solar power is ubiquitous on the surface, but of course highly dependent on the weather, season and time of day. No solar panel, even in ideal circumstances, can work at full capacity all the time, and so the problem becomes one of transferring and storing energy in a smart grid. No solar panel on Earth, that is.
A solar panel in orbit, however, may be exposed to the full light of the sun nearly all the time, and with none of the reduction in its power that comes from that light passing through the planet’s protective atmosphere and magnetosphere.
The latest prototype created by the SSPP, which collects sunlight and transmits it over microwave frequency. Image Credits: Caltech
“This ambitious project is a transformative approach to large-scale solar energy harvesting for the Earth that overcomes this intermittency and the need for energy storage,” said SSPP researcher Harry Atwater in the Caltech release.
Of course, you would need to collect enough energy that it’s worth doing in the first place, and you need a way to beam that energy down to the surface in a way that doesn’t lose most of it to the aforementioned protective layers but also doesn’t fry anything passing through its path.
These fundamental questions have been looked at systematically for the last decade, and the team is clear that without Bren’s support, this project wouldn’t have been possible. Attempting to do the work while scrounging for grants and rotating through grad students might have prevented its being done at all, but the steady funding meant they could hire long-term researchers and overcome early obstacles that might have stymied them otherwise.
The group has produced dozens of published studies and prototypes (which you can peruse here), including the lightest solar collector-transmitter made by an order of magnitude, and is now on the verge of launching its first space-based test satellite.
“[Launch] is currently expected to be Q1 2023,” co-director of the project Ali Hajimiri told TechCrunch. “It involves several demonstrators for space verification of key technologies involved in the effort, namely, wireless power transfer at distance, lightweight flexible photovoltaics and flexible deployable space structures.”
Diagram showing how tiles like the one above could be joined together to form strips, then spacecraft, then arrays of spacecraft. Image Credits: Caltech
These will be small-scale tests (about six feet across), but the vision is for something rather larger. Bigger than anything currently in space, in fact.
“The final system is envisioned to consist of multiple deployable modules in close formation flight and operating in synchronization with one another,” Hajimiri said. “Each module is several tens of meters on the side and the system can be built up by adding more modules over time.”
Image Credits: Caltech
Eventually the concept calls for a structure perhaps as large as 5-6 kilometers across. Don’t worry — it would be far enough out from Earth that you wouldn’t see a giant hexagon blocking out the stars. Power would be sent to receivers on the surface using directed, steerable microwave transmission. A few of these in orbit could beam power to any location on the planet full time.
Of course that is the vision, which is many, many years out if it is to take place at all. But don’t make the mistake of thinking of this as having that single ambitious, one might even say grandiose, goal. The pursuit of this idea has produced advances in solar cells, flexible space-based structures and wireless power transfer, each of which can be applied in other areas. The vision may be the stuff of science fiction, but the science is progressing in a very grounded way.
For his part, Bren seems to be happy just to advance the ball on what he considers an important task that might not otherwise have been attempted at all.
“I have been a student researching the possible applications of space-based solar energy for many years,” he told Caltech. “My interest in supporting the world-class scientists at Caltech is driven by my belief in harnessing the natural power of the sun for the benefit of everyone.”
We’ll check back with the SSPP ahead of launch.
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From dorm rooms to board rooms: How universities are promoting entrepreneurship
Earlier this year, 15 top U.S. universities joined forces to launch a one-stop shop where corporations and startups can discover and license patents.
Working in concert, Brown, Caltech, Columbia, Cornell, Harvard, the University of Illinois, Michigan, Northwestern, Penn, Princeton, SUNY Binghamton, UC Berkeley, UCLA, the University of Southern California and Yale formed The University Technology Licensing Program LLC (UTLP) to create a centralized pool of licensable IP.
The UTLP arrives as more higher education institutions are beefing up their investment in the entrepreneurial pipeline to help more students launch startups after graduation. In some instances, schools serve as accelerators, providing students with resources and helping them connect with VCs to find seed funding.
To get a better look at the new program and more insight into the university-to-startup pipeline, we spoke to:
- Jennifer Dyer, executive director, USC Stevens Center for Innovation
- Orin Herskowitz, senior vice president of Intellectual Property and Tech Transfer, Columbia University
- Marc De Leeuw, partner, Sullivan & Cromwell LLP
The UTLP initiative seems to be more focused on licensing IP to existing companies, rather than accelerating university startups.
Orin Herskowitz: The UTLP effort is really much more about licensing to the somewhat broken interface between universities and very large companies in the tech space when it comes to licensing intellectual property. But I know USC and Columbia and many of our peers, especially over the last three to seven years, have pivoted in a massive way to helping our faculty students fulfill their entrepreneurial dreams and launch startups around this exciting university technology.
The word “broken” jumped out at me. Historically, what has the problem been?
Orin Herskowitz: Universities have traditionally been a source of amazing, life-saving and life-improving inventions, for decades. There’s been a ton of new drugs and medical devices, cybersecurity improvements, and search engines, like Google, that have come out of universities over the years, that were federally funded and developed in the labs, and then licensed to either a startup or the industry. And that’s been great. At least over the last couple of decades, that interface has worked really, really well in some fields, but less well in others. So, in the life sciences, in energy, in advanced materials, in those industries, a lot of the time, these innovations that end up having a huge impact on society are based really on one or two or three core eureka moments. There’s like one or two patents that underlie an enormous new cancer drug, for instance.
In the tech space though, it’s a very different dynamic because, a lot of the time, these inventions are incredibly important and they do launch a whole new generation of products and services, but the problem is that a new device, like an iPhone, or a piece of software, might rely on dozens or even hundreds of innovations from across many different universities, as opposed to just one or two.
Obviously not every breakthrough necessitates the launch of a startup. I assume that the vast majority of these things that are coming would make the most sense to work with existing companies.
Jennifer Dyer: We’ve all had this renewed focus on innovation within the university and really helping our students and faculty that want to start companies, launch those companies. If you look at the space, helping educate our students that launching a company in a high-tech space may mean that they have to go out and acquire 100 different licenses, so maybe it doesn’t make sense. We’re going to be doing nonexclusive licensing, and it doesn’t preclude anyone from moving forward with this technology. This is probably the first pool for nonstandard essential patents in the high-tech space, which makes it somewhat unique. Because if you look back, most of the pools have been around standard essential patents.
The question of exclusivity is an interesting one. You wouldn’t grant exclusive rights for the right fee?
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