Trend: Designers of demand-responsive energy systems are using the mainframe-PC model for creating solutions.
Joel Makower at Two Steps Forward describes the leading edge of energy systems. Excerpts below.
Link: Joel Makower: Two Steps Forward: Office Buildings As Peaker Plants.
...the trajectory of energy technology mirrors that of information technology. Consider: the first computer systems consisted of a central computer hardwired to a lot of "dumb" terminals — so called because their principal purpose was to draw information from a big, smart mainframe. Then PCs came along and were able to do useful things themselves, as well as to talk to mainframes and to other PCs. Now, of course, everything talks to everything else — our computers with a billion other computers, as well as with our televisions, phones, and, soon, our cars, refrigerators, and wristwatches — and can do so wirelessly.
Energy systems are developing along similar lines. Most of us still live in systems where a central "mainframe" power plant feeds energy to "dumb" terminals — our homes and businesses. Increasingly, some homes and businesses are becoming smarter, as we install solar and other renewable systems to generate power, selling excess energy back to the grid. In the not-too-distant future, major appliances like refrigerators and heating and air conditioning systems will be "talking" to the electric grid, making adjustments or perhaps powering up or down during the course of the day in response to shifting energy demands and rates. Our plug-in electric vehicles and hybrids will store electricity in their increasingly more powerful batteries, and will sell extra power back to the grid when needed. We'll be able to make energy transactions from our vehicles, PCs, PDAs, and cell phones. And much of this will take place wirelessly.
All of these activities require switches, routers, microprocessors, and software — the essential ingredients of computing networks and the Internet — meaning that companies like IBM, Intel, Cisco, and Microsoft will be increasingly in the energy business.
So, where do buildings come in? Consider that electric utilities maintain "peaker plants" — power plants that are turned on during times of high "peak" demand for electricity. In many cases, peaker plants are older, dirties plants that have been replaced by cleaner, more efficient ones, but kept around "just in case" electricity demands require that they be turned on; some peaker plants are used for only a few hours a year. Suffice to say, peaker plants are subobtimal — imagine keeping an old gas-guzzler in your garage and keeping insurance paid up for a vehicle to be used just a few days a year when relatives are in town — and are often the subject of citizen opposition — whether to build new ones or keep old ones operating.