Space-Based Solar Power Interim Assessment (Release 0.1) is Published!

Hello Everyone!

Click here for the “Interim Assessment!”

The Goal for 2050 and the Build Forward

Enthusiasts and Skeptics,

To give you a basis for analysis, by 2050 the goal is to have forty or so concentrator-photovoltaic space-based solar power (SBSP) satellites in geostationary orbit, each broadcasting via microwave between 2-5 gigawatts of power to terrestrial electrical power grids, with 1-to-5 broadcast antennas that can beam power to as many locations.

This must be done using a sound business case. John Mankins calculates that this can be achieved by keeping the costs of delivery and assembly on orbit below $3,500 per kilogram–keeping the cost to customers below $0.10 per kilowatt/hour. This will drive robotic assembly and tug systems to pull these enormous structures from low orbits to geostationary. On orbit fueling stations will be required. Paul Werbos believes the best way to do this is to get launch costs down below $200 per kilogram.  But several other factors help make the business case. For example, if the price of other energy sources goes up it helps to close the business case for SBSP. Other factors include the efficiencies associated with solar collectors, energy conversion, antennas/rectennas, signal path loss, etc. Dennis Wingo and others have suggested that the first customers for space-based solar power will be international–in areas such as India and Japan where the price per kilowatt/hour is astronomical compared to the Americas or Europe. All of this goes into making the business case.

Space Solar Power: Much More Than Clean Energy

In a recent posting to washingtonpost.com, author Steven Mufson pessimistically asserts in “Climate Change Debate Hinges on Economics:”

“Because of the enormous cost of addressing global warming, the energy legislation considered by Congress so far will make barely a dent in the problem, while farther-reaching climate proposals stand a remote chance of passage.”

I tend to agree with Mufson.

We must not kid ourselves; nothing is a more farther-reaching climate proposal than space-based solar power. If pursued for that reason alone–especially as a big government program–I believe nothing would come of it. Not to despair. There are many more reasons to develop space-based solar power, and another way of going about it.

Making the Business Case for Space Solar Power

People tend to use the cheapest forms of energy. Companies tend to promote whatever has the highest profit margin. Today’s petroleum infrastructure is massive, expensive, well-integrated across the international community and still highly profitable.

So…how do we make the business case for space-based solar power?

We need to keep in mind the sage advice of Machiavelli:

One should keep in mind that there is nothing more difficult to execute, nor more dubious of success than to introduce a new system of things; for he who introduces it has all those who profit fro the old system as his enemies, and he has only lukewarm allies in all those who might profit the new system.