Heating and cooling
They account for almost 30 percent of a building's energy use. By transferring heat between the building and the earth using a system that circulates heat-absorbing liquid through underground wells, a building can reduce energy usage. A combined heat-and-power plant, fueled by natural gas, operates at up to 90 percent efficiency and supplies the power that the solar panels cannot.
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On a recent prowl through Tokyo's electronic alleyways, our tech guru was drawn to six stylish products. None is available in the U.S., but that may just be a matter of time. (more) |
