SAMSON SOLUTIONS Energy and Power (Critical Applications)

Transcription

1 SAMSON SOLUTIONS Energy and Power (Critical Applications) Speakers: Ing. Gianluigi Rossi Ing. Stefano Salvadori Managing Director - SAMSON Italy Head of Sales and Project Department - SAMSON Italy

2 MARKET DEMANDS & MAIN TECHNICAL REQUIREMENTS Energy and Power Plants requires stable and long terms reliable operations. SAMSON provides process solutions which aim to achieve and grant specific process requirements including but not limited to the following Control System: Compressor ANTISURGE Valve. Steam Turbine BY-PASS Valve. Turbo Expander BY-PASS Valve. Emergency SHUT-DOWN Valve. TRIP Valve on Gas Turbine and Steam Generator. Combined CONTROL and SHUT-DOWN Valves.

3 ANTISURGE VALVE PROCESS REQUIREMENTS: Anti-Surge protection is provided by a control valve that opens allowing gas from the compressor outlet to re-circulate to the inlet. Compressor surge happens when the downstream flow demand changes and doesn t match the current compressor operating point. The flow control system will change the driver (turbine or motor) speed if possible to adjust to the new flow rate, but the speed of the large rotating mass (driver + compressor) often can't be changed quickly enough to match the change in operating point. When the compressor speed and corresponding design flow rate don't match the actual system demand, flow reversal can occur in the compressor. Without outside intervention the flow reversal cycle will continue placing seals and other internal parts under great stress. Thus complete compressor failure is possible.

4 STEAM TURBINE BY PASS PROCESS REQUIREMENT: The turbine bypass system is a basic component of power plant, that has evolved over the years to increase operational flexibility and plant life, protecting its components during transient operation. The turbine bypass system enables independent activity of the steam generator and turbine during start-up, load rejection, shutdown and variable pressure operation. This autonomous operation reduces start-up and reloading times and increases overall plant availability, efficiency and lifetime. One of the main issue is to get fast and reliable operations and responds from the plant. Start up: Valve bypass recirculates steam until the turbine reaches correct temperature No Boiler Trip after load rejections: Steam produced by boiler exceed the amount demanded by the turbine. Fast acting turbine by-pass to absorb and recirculate excess flow saving steam dumped to atmosphere.

5 ANTISURGE VALVE MAIN FEATURES: GLOBE VALVE Reinforced, Balanced and Perforated Plug. FLUID: Gas Mixture

6 Temperature [ C] GLOBE VALVE FOR TURBO EXPANDER Organic Rankine Cycle is a thermodynamic cycle based on the Rankine classic cycle using an organic working fluid Cyclo-Pentane as working fluid. ORC cycle T-S diagram T dew T bubble T min p T max p Cyclo-Pentane C5H10 characteristics: Heaters Expander Recuperator Condenser Pump Regenerator Pre-heater Condenser Pum p Entropy [kj/(kg C)] Superheater Vaporizer Expansion Regenerator -1 Boiling point Freezing point Molecular Weight Auto-ignition point 49.3 C -94 C C (Max C5 temp below auto-ignition point) Appearance: clear, colorless liquid No corrosion risk on plant equipment

7 GLOBE VALVE FOR TURBO EXPANDER TURBO-EXPANDER MAIN FEATURES: BY-PASS PRESSURE GLOBE VALVE Special Trim including: Diffuser Plates Dump Tube Fluid: Cyclo-Pentane To control turbine gas flow rate on ORC System.

8 EXECUTED PROJECTS (SAMSON GROUP) TRIP VALVE FOR GAS TURBINE SHUT-DOWN VALVE FOR EMERGENCY ANTISURGE CONTROL VALVE COMBINED CONTROL AND SHUT-DOWN BUTTERFLY VALVE

9 TRIP VALVE MAIN FEATURES: BUTTERFLY VALVES TRIPLE OFF-SET FLUID: NITROGEN PROCESS REQUIREMENT: To avoid damage on gas turbine and generator, closing time must be less then 0,7 Sec. Flow must be stopped immediately to avoid increase of speed / frequency of the generator.

10 EMERGENCY SHUT DOWN VALVE MAIN FEATURES: BUTTERFLY VALVES TRIPLE OFF-SET FLUID: Natural Gas PROCESS REQUIREMENT: The SHUT DOWN Valve, (also referred to as SDV or Emergency Shutdown Valve, ESV, ESD, or ESDV) is an actuated valve designed to stop the flow of a hazardous fluid upon the detection of a dangerous event. Closing Time: 0,7 Sec. from open to close

11 TRIP VALVE MAIN FEATURES: BUTTERFLY VALVES TRIPLE OFF-SET FLUID: Natural Gas PROCESS REQUIREMENT: Trip (either Throttling) Control Valve is necessary when we want to control Compressor Suction Flow. Valves must have good controllability, low Hysteresis and high response step control. Dynamic parameters must be respected.

12 COMBINED CONTROL AND SHUT DOWN VALVES MAIN FEATURES: 2 x BUTTERFLY VALVES TRIPLE OFF-SET FLUID: Steam PROCESS REQUIREMENT: BUTTERFLY Valve for steam control to turbine combined with a shut down valve to stop flow and to avoid electric generator overspeed. Closing Time: 0,3 Sec. from open to close

13 SMART IN FLOW CONTROL. Thank you for your attention! SAMSON SRL Via Figino Pero (MI) - Italy Phone: Fax: info@samson.it - Internet: Speakers: Ing. Gianluigi Rossi Ing. Stefano Salvadori Managing Director SAMSON Italy Head of Sales and Project Department