NDLI: Tube Failure During Startup in a Steam Surface Condenser Installed in a Combined Cycle Plant Operating in Cold Climate

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Nadig, Ranga
Copyright Year	2004
Abstract	Combined cycle plants in cold climates experience low circulating water inlet temperatures during winter months. Low circulating water inlet temperatures combined with partial bypass steam flow to the condenser results in extremely low condenser pressures and high steam velocities. Improper design, control & operation of desuperheating valve and improper drainage of bypass header lines can lead to pockets of wet steam in the bypass steam. High steam velocities combined with wet steam pockets of varying quality can cause flow-induced vibration and tube failures. This paper examines the performance of a condenser in bypass mode for varying condenser pressures, bypass steam flow rates, support plate spacing, and moisture pockets with varying quality. Actual and critical steam velocities are calculated. Condenser operating points prone to flow-induced vibration and associated tube failures are predicted. Recommendations on safeguards to eliminate flow induced vibration and resulting tube failures are discussed.
Sponsorship	Power Division
Starting Page	1
Ending Page	5
Page Count	5
File Format	PDF
ISBN	0791841626
DOI	10.1115/POWER2004-52001
Conference Proceedings	ASME 2004 Power Conference
Language	English
Publisher Date	2004-03-30
Publisher Place	Baltimore, Maryland, USA
Access Restriction	Subscribed
Subject Keyword	Water Climate Temperature Condensers (steam plant) Valves Flow (dynamics) Cold climates Design Drainage Flow-induced vibrations Steam Combined cycle power stations Failure
Content Type	Text
Resource Type	Article

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