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1971 - SMOG SMASHER. Plumes of warm, moist air - rising from this laboratory model of a proposed new cooling tower - are being studied by General Electric Research and Development Center engineers as a means of ventilating the smog-laden skies over the nation's large cities. The GE studies show that a massive plume - rising slowly from the 600 foot wide mouth of a low silhouette cooling tower - would pass through atmospheric inversions, a condition that occurs when a layer of warm pins down a layer of cool air. The latter, if trapped over an urban area, becomes increasingly polluted and smog-laden. In addition to ventilating the air over metropolitan areas, the cooling tower also would perform its basic function - permitting electric power stations to discharge thermal exhaust thousands of feet into the atmosphere - effectively and acceptably. GE Engineer Dale H. Brown is shown working with a model of the proposed 60-foot-high structure in an environmental chamber in which heat lamps are used to create a man-made inversion layer. During inversions, plumes from conventional cooling towers usually reach an altitude of only a few hundred feet

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Addition Altitude Basic Becomes Conventional Cooling Create Discharge Effectively Environmental Exhaust Function Increasingly Lamps Latter Layer Man-made Massive Means Moist Occurs Permitting Pins Plume Plumes Polluted Proposed Reach Slowly Smasher Smog Studied Studies Thermal Trapped Usually Ventilating

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