benson® test rig - siemens energy ag
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www.siemens.com/powerplants
Benson® test rig
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Tried, tested and trustedThe Benson test rig is installed in an accredited laboratory in Erlangen, Germany. In operation since 1975, its main purpose is to investigate topics associated with the opera-tion and further development of Benson steam generators and heat recovery steam generators. Intensive research and development is especially being conducted in the field
of heat transfer, pressure drop and flow stability of two phase flows in evaporator tubes. This has led to the estab-lishment of the world’s largest database on heat transfer and pressure drop in evaporator tubes. Moreover, the test results help developing and validating the Benson design software.
Benson test rig
Ministry of Electricity and Energy, Egypt
Equipment of three combined cycle power plants
24 vertical triple-pressure Benson heat-recovery steam generators
Part of the megaproject designed to increase electricity generation in Egypt by 50 percent
Highly efficient and flexible combined cycle operation
Spray condenser
Test section
Trickle cooler
Main cooler
Reduction valve
Circulation pump
Piston pump
Pressurizer
Feedwater tank
Preh
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Technical data
System pressure 330 bar
Temperature 600° C
Mass flow 4 kg / s
Heat capacity 2,000 kW
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The test facility mainly comprises a water supply system, the object to be tested, a thermal pressurizer and a cooling system. If large mass flows are required for certain investi-gations, the test rig can be operated in recirculation mode. The thermal pressurizer is a unique feature of the Benson test rig and keeps the pressure in the system extremely sta-ble. This is a necessary precondition for reliable steady-state heat transfer measurements in the pressure range close to the critical pressure.
The physical phenomena and theoretical basis for the dynamic stability of two-phase flows have been investi-gated, understood and documented in the context of the Benson license. A test stand with tubes configured in paral-lel was installed in the Benson laboratory in Erlangen in 2014 for further investigation of the phenomenon. This
setup enables the reproducible generation and observation of dynamic instabilities in vertically configured heated tubes with a geometry typical for Benson evaporators under labo-ratory conditions for the first time in the world. The tests are currently being evaluated to further validate the pro-grams for dynamic stability simulation available at Siemens.
Database for heat transfer and pressure drop in evaporator tubes
SOFTWARE APPLICATION
DEFOS
Fired steam generator
Thermodynamic performance
STADE Pressure drop in single tubes
STADENET Flow distribution in thermohydraulic networks
WATHUN Detailed heat transfer analysis
DYNASTAB Dynamic flow stability
WATHAN Membrane wall strength
KRAWALHRSG
Thermodynamic & thermohydraulic analysis
DYNAPLANT Dynamic flow stability
DYNAPLANTBoth
Benson-specific control concepts
WATSEF Water/steam separator efficiency
Tube geometry
Heating
vertical
Tube orientation inclined
horizontal
Numbers of mesurements (07 / 2017)
Smooth
> 307,000
Rifled
> 285,000
uniform one side uniform one side Typical test parameters:
Pressure 25≤p≤280bar Heatflux 0≤q≤950kW/m2
Massflux30≤m≤2,500kg/(sm2) Tubeinnerdiameter8≤d≤50mm
Benson software
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Trademarks mention ed in this document are the property of Siemens AG, its affiliates or their respective owners.
Subject to change without prior notice. The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should there-f ore be specified in the contract.
www.siemens.com / powerplants
Published by
Siemens AG Power and Gas Division Freyeslebenstrasse 1 91058 Erlangen, Germany
For more information, please contact our Customer Support Center:
Phone +49 / (0)180 / 524 70 00 Fax +49 / (0)180 / 524 24 71 (Charges depending on provider)
E-mail: [email protected]
Dispo 05400 BR 10170.0 Article No: PGES-B10050-00-7600
Printed in Germany