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HYDROGEN GENERATORSGenerators can also make hydrogen using one of two basic technologies: proton-exchange membranes (PEM), and palladium membranes. Hydrogen gas generators are most often used in gas chromatographs and in labs for hydrogenation reactions and engine-emission analysis. PEM systems from Parker produce flows from 90 to 1200 cc/mm of 99.99999% pure hydrogen at pressures from 0 to 100 psig. The Balston H2-500 hydrogen generator uses deionized water and electricity. It produces hydrogen gas through electrolytic dissociation of water via the PEM. The resultant porter-cablepowertoolsvintage hydrogen stream then passes through a palladium membrane for purification. Because of the membrane''s small pore size, only hydrogen and its isotopes penetrate it. A membrane thus keeps the hydrogen gas at a purity level of two orders of magnitude greater than desiccant or silica gel-based systems. new compressor technology introduced during the 2003 International Air-Conditioning, Heating, Refrigerating Exposition (AHR Expo), held last January in Chicago, may have a significant effect on the future of mid-range chillers and rooftop applications in water-cooled, evaporatively cooled, and air-cooled chilled-water and direct-expansion (DX) systems. Designed and optimized to take full advantage of magnetic-bearing technology, the compressor was awarded the first AHR Expo Innovation Award in the energy category, as well as Canada''s Energy Efficiency Award for its potential to reduce utility-generated greenhouse-gas emissions. The compressor is key to a new water-cooled centrifugal-chiller design, with Air-Conditioning and Refrigeration Institute (ARI) tests indicating integrated part-load values (IPLVs) not normally seen with conventional chillers in this tonnage range.

TALK TO GOLFERS about their on-course disputes and one word more than any other peppers the conversation: Gimme."I''m at Old Head in Ireland with my good friend Ryan," says Alan. "It''s the last day of the trip, it''s a perfect morning and we''re having a match. On the front nine somewhere, on a par 3, Ryan is messing up, and it continues on the green. He misses his second putt and has a two-footer left for 5 or something and just rakes it in. ''That''s enough,'' he says. I''m thinking, Well, OK, but I''m not doing too well, either. Sure enough, I miss my putt and we halve the hole. I''m steamed. ''C''mon, mine was good,'' he says. So I go, ''Yeah, OK,'' to be nice, and then skid my drive into the deep, deep rough. He stripes it down the middle. We don''t talk for the rest of the day."