Word: thermally
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...solar professional; he installs solar heating systems in houses. Jim spoke to us in the technical language of solar contracting. He spoke of structural attachment points, insulated thermal blinds, weather surfaces, triple glazed window systems, release temperature, mean-radiant temperature, stick-framing, R-factors, maintenance-free super-insulated maximum-efficiency collectors, and unstratified heat...
...went into the basement and saw a 2000-gallon water drum that Jim had made out of copper. Water heats in the solar panels up on the roof, and flows down to this thermal bank. An industrial computer listens to thermometers throughout the house and controls a pump which sends hot water to cool places. The water flows through a rubber tube under the strips of metal that Jim called "radiant." The water warms the radiant, and the radiant warms the room...
...with us again; he had done the solar work here as well. By this point I had had about enough lecturing on solar power for one day. There was the same copper tank in the basement and the same talk about thermal efficiency, floor radiant and sweat equity...
...begin to dictate different, and quickly contradictory, solutions. Very thick mirrors resist physical deformation extremely well, but because they retain so much heat, they tend to generate shimmering currents in the cold night air that play havoc with astronomers' observations. Very thin mirrors, on the other hand, have ideal thermal properties but a daunting physical handicap: as the telescope pans across the sky, a thin mirror will bend and wobble as if made of rubber...
...underlying structure. Arrayed in a striking hexagonal pattern, the ribs form an airy honeycomb that confers on the mirror the structural strength of solid glass at one-fifth the weight. Because the hexagonal cells are hollow, air can be circulated through them to keep the mirror in constant thermal balance...