| 摘要 |
<p>A power plant system utilizing a zoned or multipressure condenser or cooling tower whose different zones are air-cooled in a dry manner. The zoned condenser may condense motive cycle fluid by passing it directly through air-cooled heat exchange conduits or by passing a dense fluid through an intermediate, zoned condenser where it boils as it absorbs heat from the cycle fluid and then through the aforementioned zoned, cooling tower. A separate coolant circuit is used between each intermediate condenser zone and the cooling tower. Each intermediate condenser zone is maintained at a predetermined pressure by the coolant flowing through one of the coolant circuits and transporting heat therewith from the intermediate condenser to air flowing through the dry cooling tower. To obtain different boiling and condensing temperatures in the coolant circuits different coolants or different coolant pressures must be utilized therein. The coolant circuits are preferably arranged in the dry cooling tower in series airflow relation in the order or increasing coolant circuit temperature along the direction of normal cooling air flow. Zoned, multi-pressure condensers increase efficiency of the power plant system while the use of such dense, boiling coolant can decrease the surface area required in the intermediate condenser and cooling tower and reduce the amount of coolant that must be circulated therebetween.</p> |
