Word: thermal
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...Hawaii were delighted with your article on "Cooking with Bagasse," covering our alternative energy activities [Sept. 20]. However, the discussion of ocean thermal energy conversion (OTEC) confuses several separate projects. You note the success of the mini-OTEC facility and then state: "But a larger plant built in 1981 off Kailua-Kona, on Hawaii, was a $50 million failure." The larger plant you refer to was a Federal Government project, which was terminated owing to lack of federal funds. Contrary to your statement, Hawaii has not ordered designs for four new 10-megawatt OTEC plants. Rather, the Federal Government...
...from eight classes survey the school's area, christened Clark City for purposes of the project, and assess the needs through scale drawings and detailed models, complete with wiring, batteries and lights. Says Anton Anderson, 12: "I know all about kilowatts now and B.T.U.s. That's British thermal units." During the past year, pupils in the Clark City classes boosted their reading-skill level by 14 months, compared with the eight-month increase recorded by other students. In turn, the Commonwealth Edison volunteers have learned firsthand about the concerns of their inner-city customers. Says Division Vice President...
...Ocean thermal energy conversion, or OTEC, is decades away from full development, but one OTEC scientist feels that it may one day deliver as much energy from Hawaiian waters alone as the entire U.S. now consumes. OTEC utilizes warm surface waters to heat pressurized ammonia, which vaporizes, expands and propels a power turbine. Then the gaseous ammonia is cooled by subsurface waters, converted back to a liquid and repeats the process all over again. In 1979 a floating mini-OTEC plant generated a net 15 kilowatts per hour, making it the first such plant to produce more energy than...
Post-flight inspections of the thermal protection system, a blanket of 31,000 silica tiles which protects the 122-foot long orbiter from the heat of reentry, revealed only minor damage and no missing tiles, White said. The tiles had been a problem on Columbia's first flight in April, and were a source of many of the delays that set the $10-billion shuttle project more than three years behind schedule...
...gasmen eagerly point out that, nationally, oil is now about twice as costly as gas (though the price differential can vary widely from area to area). In Philadelphia, for example, 1 million British thermal units of heat produced by gas cost $4.56, vs. $7.27 when oil is burned. For an average home consuming 121 million B.T.U.s per year, the annual bill for gas heat will be $552, compared with $880 for oil. But in New York City, gas is only 17% cheaper than...