Westinghouse Electric Corporation

David L Ayers

Michael C Skriba

Terry Wright

Dale White

Allan E Hribar

Mark R Hogan

For removal of the contaminant deposits from a surface such as a tube sheet of a vertical tube heat exchanger, as in a nuclear steam generator, having plural spaced heat exchange tubes connected to the tube sheet, a lance is radially moved along the tube sheet between parallel rows of tubes. The lance carries a nozzle for ejecting a stream of high pressure cleaning fluid toward the sludge deposits, the nozzle acting cyclically to sweep the stream throughout a range of directions centered about the nozzle axis. The nozzle may include diverting streams for deflecting the cleaning fluid stream, with the diverting streams either being generated by a fluidic oscillator or being fed back from the outlet portion of the nozzle. Alternatively, pivoting vane means may be provided in the nozzle to divert the cleaning fluid stream.

Method and apparatus for providing oscillating contaminant-removal stream

Fluid-to-air heat exchanger apparatus which maximizes heat dissipation capacity for a given base size, while reducing operating sound level. The components of the heat exchanger are vertically located in a vertically elongated housing, with the tube core and fans centrally disposed therein. Sound attenuating muffler sections are disposed above and below the tube core and fans, with the air entering and leaving the housing adjacent to the bottom and top portions thereof, respectively.

Heat exchanger for cooling electrical power apparatus

A mechanical refrigeration system is arranged to function as a heat pump for the purpose of drying material, such as shelled corn for example, with ambient air being first passed through the refrigerant condenser to be heated, then passed through the material to be dried, and then passed through the refrigerant evaporator and discharged back to atmosphere.

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West Lafayette, IN, United States of America

David L Ayers