DRY COOLING SYSTEM FOR POWERPLANTS

摘要

An indirect dry cooling system suitable for steam condensing applications in a power plant Rankine cycle in one embodiment includes an air cooled condenser having a plurality of interconnected modular cooling cells. Each cell comprises a blower and tube bundle assemblies each including inlet headers, outlet headers, and plurality of tubes extending between the headers. In one embodiment, the tube bundle assemblies may be shop fabricated as a unit to form an A-frame or V-frame cell construction The tubes may be finned. Steam circulating in a closed flow loop on the tube side from a steam turbine is cooled in each cell by ambient air blown through the tube bundles, thereby forming liquid condensate. The condensate is collected and returned to the Rankine cycle for reheating to form steam to drive the turbine.

主权项

1. A dry cooling system for condensing steam, the system comprising:
a steam turbine fluidly coupled to a Rankine cycle flow loop circulating a heat transfer medium; an air cooled heat exchanger fluidly coupled to the Rankine cycle flow loop and arranged to receive exhaust steam from a steam turbine; the air cooled heat exchanger comprising a plurality of fluidly interconnected cooling cells each comprising:
a pair of first and second inlet headers fluidly coupled to the Rankine cycle flow loop;a pair of first and second outlet headers fluidly coupled to the Rankine cycle flow loop;a first tube bundle comprising a plurality of tubes fluidly coupled between the first inlet and outlet headers;a second tube bundle angularly oriented to the first tube bundle and comprising a plurality of tubes fluidly coupled between the second inlet and outlet headers; andan air blower arranged to direct ambient cooling air through the first and second tube bundles; wherein exhaust steam from the steam turbine is bifurcated and flows to each of the first and second inlet headers, through the first and second tube bundles wherein the steam is condensed forming condensate, the condensate being collected in the first and second outlet headers and then flows back to the Rankine cycle flow loop.