This must surely be the most interesting time (in my lifetime) to be designing and developing buildings. The new technologies that are zooming forward are truly changing the world of the built environment – and very much for the better.
Take, for instance, power sources, distribution and consumption. Some of the technologies we’re exploring today, I hadn’t even imagined 5 to 10 years ago. As to sources, solar generation of electricity is with us today in a big way – not only solar panels (the cost of which continues to go down) on the top of office buildings, but in large arrays being built by utilities and incorporated into our power grids.
Along with solar power (only available during sunlight hours) storage for non-sunlit times is advancing. When I first incorporated solar panels on the roof of a house I built in San Francisco in 2001, I wanted to have a battery back-up. This consisted of a rack of 12-volt car batteries – expensive and high-maintenance. There were no Tesla Power Walls in 2001 nor other more efficient and less expensive storage systems. Today there are several, with others being designed and coming to market every day, reducing cost, increasing efficiency and improving maintenance. The only good thing then was that photovoltaic panels generated 12-volt DC current and that’s what batteries liked. I still needed an inverter to power the lighting in my home to inefficient incandescent lamps and, although a little more efficient, fluorescent lamps.
Today, the world is being lighted increasingly by LED (light-emitting diode) amps, with much longer lamp lives and much reduced power consumption. And color technologies with LEDs have improved greatly, with many of them being manufactured today to allow tuning to exactly the color temperature that you desire or continuously tunable to follow the circadian cycle of daylight. Very effective for healing in hospitals and for higher productivity and health in office spaces. Take a look at recent writings on biophilia to understand why that is important.
By the way, I should also mention that LEDs operate best on 12-volt DC current. It just so happens that 12-volt DC is what flows through your computer cables to recharge your computer and your cellphone. And, guess what, no conduit or electrical inspections required. I’m working with one company that offers complete lighting and control solutions based on 12-volt DC power, which we’re evaluating incorporating into our project here in Reno. This same company has done street lightning between two towns in South America that are 21 kilometers apart. The system is off-grid. All the power comes from solar panels mounted every so often along the route. Powers is stored in a battery system by day to be used to illuminate the route at night. By the way, Wi-Fi is flowing through these lines as well.
Now, let’s return to power. New technologies are available to deliver 12-volt DC power from a clear glass window. We’re building several structures that have due east, south and west exposures in a bright sunlight city. We and the companies we’re talking to are also exploring electro-chromic and photo-chromic (which is used in glasses that automatically turn into sunglasses when sunlight hits them) coatings. If we can put all the pieces together, we’ll have a glazing system that will generate 12-volt DC power to LED lights, requiring neither an inverter or a transformer at the lamp end. We’ll have glass that will turn into sun shading either electrically or automatically, so I’ll actually be able to look at the views outside my windows without drawing curtains, blinds or shades.
Are you beginning to see why I’m so excited about being a designer/developer today?