topping cycle

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English

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Noun

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topping cycle (plural topping cycles)

  1. (engineering) The high-temperature power cycle of a combined cycle power plant.
    The very-high-temperature helium turbine, driven directly by the superheated coolant from the fission reactor, serves as the topping cycle for a mercury-vapor turbine powered by the heat given up by the helium; the mercury turbine itself serves as the topping cycle for the steam turbine that takes up most of the space of the turbine hall.