cooling water system€¦ · 11. march 2010. slide 4. intention of the examination. situation: •...
TRANSCRIPT
08. March 2010
C. Briele, J. Mönkemöller, D.Nalliah,S. Stillberg, J. Wahle
Dr. M. Oertel, Prof. Dr. A. Schlenkhoff
Hydraulic Engineering SectionCivil Engineering Departement
Bergische University of WuppertalGERMANY
Cooling Water Systemin a gas and steam turbine power plant
Slide 211. March 2010
Contents
• Introduction• General informations about the power plant in Hannover• Situation, problem, aim• Hydraulic model• Types of vortexes• Laboratory tests and results• Summary
Contents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 311. March 2010
Located:• Hannover, Germany• River called Ihme
History: • Carbon power plant (1960–1990)• Steam power plant (1990–1999)• Now gas and steam turbine power plant
Power:• operating 3.000 hours per year• 10.000 MWh => energy for 4000 households
per year Hannover
Wuppertal
Map of GermanyThe powerplant next to the river Ihme
General informations about the gas-steam power plantContents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 411. March 2010
Intention of the examination
Situation:• The power plant gets enlarged: more cooling water needed second pump (SCWP) for each pump sump
• Optimal: one pump sump for each pump cannot be realized The pumps cannot be placed in-line
because of an obstacle
Problem: • pumps are sensible towards air-pulling
Aim:find out the circumstances, under which the pumps can operate reliable is it possible to have two pumps in one pump sump in general lowest water level
SCWP
obstacle
PCWP
SCWP
Pump sump
Secondary cooling water pump
Contents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 511. March 2010
Hydraulic Model
Pump Sump:
• made of plexiglas• scale up 1:10• Flow: Q = 12 l/s
Hydraulic model
Contents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 611. March 2010
Laboratory Tests
Nr. flow rate PCWP flow rate SCWP Comment
1 9000 m3/h out of business to identify critical water-level
2 out of business 2000 m3/h to identify critical water-level
3 7200 m3/h 1800 m3/h to identify critical water-level
4 variable 1800 m3/h to identify maximum flow rate of PCWP
Contents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 711. March 2010
Survey, which types of vortexes can be found
Types of vortexes HECKER (1987)
Contents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 811. March 2010
Survey, which types of vortexes can be foundContents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 911. March 2010
Survey, which types of vortexes can be foundContents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 1011. March 2010
Example ResultsContents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 1111. March 2010
New configuration of SCWP in-line
Intention:
Reduction of turbulent flow structures within the chamber, leading to a better vortex situation.
PCWP SCWP
Pump sump
Contents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 1211. March 2010
Result comparisonsContents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary
Slide 1311. March 2010
Thank you for your attention!
Hydraulic Engineering SectionBergische University of Wuppertal
Fon: +49 202 439 4195Fax: +49 202 439 4196
Summary
• Hydraulic model of cooling water system has beenbuilt in the hydraulic laboratory
• Analyzing various boundary conditions• Detection of air vortexes and critical flow conditions• in-line configuration shows better flow characteristics concerning vortexes and critical water levels
Contents
General informations
Situation, problem, aim
Hydraulic model
Types of vortexes
Laboratory testsand results
Summary