Word: heated
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Dates: during 1970-1979
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...industry they regulate to remain as critical as they should be. Certainly the DC-10 was rushed into production in the early 1970s in a successful race to catch up with the TriStar, its main rival. Were corners cut by both the manufacturer and its watchdogs in the heat of competition...
...most common solar devices, accounting for 95% of sales, are the flat, boxlike, conventional thermal units that sit on rooftops. These use the sun's rays to heat water, which in turn heats home water systems. A basic series of units for a one-family home costs about $2,000 and saves only about $40 a year in fuel bills. The promising new frontier is photovoltaics, the direct conversion of sunlight into electricity by using silicon-crystal panels. Though the price of photovoltaic cells has been cut in half since 1975, the cost is still $9 per watt,*equal...
Wood is by far the most promising popular biomass fuel, especially in the thickly forested areas. In northern New England, where energy costs 26% more than the national average, nearly 20% of all homes rely on wood as a primary heating source. Its use has grown sixfold since 1970 because 1) new, all-enclosed wood stoves increase heat efficiency way above that of open fireplaces, and 2) new central-heating furnaces that burn both wood and oil can save up to 200 gal. of oil for each cord (128 cu. ft.) of wood consumed. A New England Congressional Caucus study...
...power of the ocean is obvious to anyone who watches the violence of the sea in a storm. Four forms of seapower could be exploited: currents, tides, waves and heat...
Ocean Thermal Energy Conversion (OTEC) devices, which get power from the 45° F temperature differential that can exist between surface tropical water and the deep, are being studied by both Lockheed and TRW Inc. The idea is to use the warmer water to heat liquid ammonia into gas, which would drive a turbine, and then draw up cold water through long pipes to recool the gas into liquid. Tested as early as the 1930s, the idea has been shown to work, but it has never been very economical. A 10,000-Mw complex, enough for 6.6 million people, would...