pipenet presentation process & power industry (all)

PIPENETTM - Leading the Way in Fluid Flow Analysis

SUNRISE SYSTEMS LIMITED

Sunrise Business ParkEly RoadWaterbeach Cambridge CB25 9QZUnited Kingdom

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E-mail:[email protected]

Web:www.sunrise-sys.com

SUNRISE SYSTEMS, UK

PIPENET VISION

DETAILED DEMONSTRATION

AND

DISCUSSION OF APPLICATIONS




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PRESENTATION OUTLINE

• Introduction

• Transient Module Detailed Demonstration and Discussion of Applications

• Spray/Sprinkler Module Detailed Demonstration and Discussion of Applications

• Standard Module Detailed Demonstration and Discussion of Applications




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PIPENET VISION

INTRODUCTION




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WHAT IS PIPENET

• Standard Module

• Spray/Sprinkler Module

• Transient Module

Three modules ensure that, no matter how extensive or complex your network,

PIPENET will perform.

PIPENET is a powerful software tool for rapid flow analysis of pipe and duct networks.




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Standard Module• General purpose flow analysis applications. Utility

systems and HVAC systems

Spray/Sprinkler Module• Design of fire protection systems in compliance with

NFPA rules

Transient Module• Dynamic analysis of pipe networks, along with the

calculation of hydraulic transient forces.

THE MODULES OF PIPENET




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• PIPENET has its origins at the University of Cambridge in the 70’s

• Computer Aided Design Centre (AVEVA) bought the rights to PIPENET in 1979

• Sunrise Systems was set up in 1985 to specialise in the further development of PIPENET

• Head Office in Cambridge, UK

HISTORY




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• PIPENET is the industry standard software product in the U.K. and many other parts of the world.

• PIPENET has a key role in improving design optimisation and safety standards in the oil&gas industry

• Over 2000 users world-wide.

• PIPENET has been in industrial use for over 26 years

• User Friendliness is high priority

• PIPENET is constantly being updated and enhanced, putting us at the forefront of pipework and pipeline design technology.

• Technical support is a key aspect of company culture

• SUNRISE SYSTEMS is accredited with ISO 9001.

THE PEDIGREE OF PIPENET




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HOW TO LEARN PIPENET

• Help Manual

• Seminar and Training Course

• Demos Introduction Demo Unique Features & Usage Tips Demos

Standard ModuleSpray/Sprinkler ModuleTransient Module

Training Demos

• PIPENET News




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PIPENET VISION TRANSIENT MODULE

DETAILED DEMONSTRATION AND DISCUSSION OF APPLICATIONS

• Why Using Transient Module

• Transient Module Applications and Examples in Process Industry

• Transient Module Applications and Examples in Power Industry




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Why Using Transient Module

• This section is aimed at raising the profile of using PIPENET TRANSIENT in the minds of

– Managers

– Operators

– Plant owners

– Designers

– Installers




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National Codes and Standards

• Many National Codes and Standards have requirements to design piping systems to take into account the effects of occasional loads such as pressure transients in systems.

• This is not only concerns positive pressures but also negative pressures.

• Full vacuum can occur when there is column separation in a pipeline. This commonly occurs when there is a loss of power or rapid closure of an upstream valve.

• Thin wall ferrous and low stiffness thermoplastic pipe may be subjected to the occurrence of buckling due to vacuum.




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Types of Damage from Surge

• There are two categories of damage that arise from surge events

– Catastrophic failure of the pipeline or equipment

– Fatigue damage to pipelines, equipments and supports




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Catastrophic Failure of the Pipeline or Equipment

• Pipelines have been known to fail catastrophically as a result of surge events. The failure may take the form of a pipe burst or a pipeline collapse from buckling. The consequences could be1. Delay to completion of the project

2. Plant and equipment non availability to the process and thus loss of earnings

3. Environmental damage

4. Personal injury

5. Loss of reputation and branding

6. Loss of future work from the client

7. Damage to other properties, injuries to the public

8. Increased insurance premiums




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Fatigue Damage to Pipelines, Equipments and Supports

• Pipeline1. The derating of pipeline materials occurs because of

the fatigue that occurs. To overcome the potential of fatigue failure increased pipe wall thickness is required to reduce the stress level in the pipe wall.

2. Pipeline accessories may fail to fatigue damage. These include leaking gaskets, valve body, seal or gasket failure, instrument failure or pipe support failure.

• Equipments

Damage to equipment may mean that a process is offline whilst replacement equipment is installed. The on-costs can be many times the primary price of the equipment alone.




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• Equipments (cont.)– Pumps1. Pumps can suffer damage to the seals, bearings, impeller,

shaft and casing from surge events.

2. In today’s world of high speed small frame pumps the relatively small nozzles are particularly vulnerable if the piping is not correctly supported or isolated.

3. Seals are damaged as a negative pressure may lift the seal face and allow solids to enter. This will lead to wear and consequential leaks.

4. Cast iron bodied pumps can fail because of the stress reversals in a fatigue situation. Cast iron is particularly weak in tension.

5. A surge event may create vortexing that results in loss of prime to a pump system.




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• Equipments (cont.)– Valves1. Valves can be damaged by fatigue such their seats will allow fluid to

pass and thus not isolate as designed. Gland seals are likely to leak requiring the retightening of the gland or complete re packing.

2. Control valves may be susceptible to loss of control during a surge event.

3. Control valves have parts that are more likely to be damaged. Such items as positioners or other electronic components are vulnerable.

4. Check valve seats may be damaged and thus leak. This results in a waste of energy in duty/standby pump arrangements as fluid is recirculated. Shafts and pins have been known to fail due to fatigue.

5. There have also been incidents of the flaps in a dual flap check valve failing completely and lodging is some other process equipment causing blockages.

6. Air release/ vacuum valves usually have small components or floats that can be damaged by pressures in excess of design or severe vibration resulting from surges.




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• Equipments (cont.)– Valves7. Relief valves may discharge as a result of a surge event. If this

occurs frequently the seat may fail from fatigue.

8. If the valve is buried it becomes a major exercise to replace.

• Pipe Supports1. The vibration resulting from a series of surge events can

cause the pipe support to damage the external surface of the pipe material and result in a leak.

2. Pipe supports secured to concrete or steel structures can fail at the fasteners as a result of fatigue.

3. Concentrated masses such as valves may be excited by surge events and cause damage to the piping material.




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Consequences of Fatigue Damage

• Emergency call out resources• Alternate supply lines• Increased maintenance costs• Increased investment in maintenance resources• Complaints procedures• Standby equipment• Increased level of spares holding• Possible special freight arrangements for remote

sites• Increased insurance premiums• OH&S and industrial relations problems

(Occupational Safety and Health)




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Significant Devices in a System that Contribute to Surge

• Pumps– A parameter used in the surge analysis of a pump

system is the moment of inertia (MOI) of the pump, fluid and motor rotating elements.

• Check Valves– The type of check valve used has a great bearing on

the pressure transients that can occur in a system.

• Air/Vacuum Release Valves– The air/vacuum release valves used on pipelines

come in many forms of complexity.




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Photos of Damage on a Pipeline System from Customer




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Why Don’t Engineers Undertake Surge Analysis?

• You may well ask why engineers don’t carry out a water hammer analysis. Could it be that:– There is difficulty in undertaking the calculations using

the graphical techniques of yesteryear or modern software of today?

– You don’t have the software and these specialist tools are not easy to obtain funding approval for in a large company? Employ a specialist who does!

– It is not understood whether it is an art or a science? Need to increase your knowledge?

– Fear of the unknown and you were not taught the subject at university?

– Failures don’t appear to be frequent, but consider that most events are buried in confidentiality agreements following litigation.




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TRANSIENT MODULE APPLICATIONSIN PROCESS INDUSTRY

• Transient Analysis of Pipelines

• Firewater Systems

• Water Injection Systems

• Cooling Water Systems

• Loading and Unloading Systems

• Generating Loads for Pipe Stress Analysis




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TRANSIENT MODULE APPLICATIONSURGE ANALYSIS OF A LARGE COOLING WATER

SYSTEMNANHAI PETROCHEMICAL PLANT, CHINA




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KEY POINTS

• One of the Biggest Petrochemical Plants• Main Header Is 2.0 M Diameter• Plant Has 4 Systems in Parallel• Cooling Water System Uses GRP• Open System With Cooling Tower• Slow Valve Closure Necessary – 240 Sec• Severe Oscillations After Valve

• Valve Closure Scenario• Pump Trip Scenario




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OBJECTIVES

• Reduce Oscillations To Less Than 1 Bar

• Keep Pressure Surge to Less Than 8 Barg

• Optimise Valve Closure Time




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• Downstream pressure with 240 sec closure




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• Downstream pressure with 40 sec closure




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• Pressure Range with 240 Sec Valve Closure




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• Pressure Range with 60 Sec Valve Closure




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CONCLUSIONS

• Pressure Range Is Below 1 Bar

• Maximum Pressure Is Below 8 Barg

• 240 Sec Valve Closure Time Is Necessary




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TRANSIENT MODULE APPLICATION OFFSHORE FIREWATER SYSTEM

NOWROOZ OFFSHORE PLATFORM COMPLEX, IRAN




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KEY POINTS

• Operator Is Shell, In Offshore Iran

• Two Sister Platform Complexes – Soroosh (3 Platforms) And Nowrooz (2 Platforms)

• The Firewater Ringmain Is Made Of GRP Pipes

• Pressure Controlled Deluge Valves Were Used

• Bridge Connection Between The Platforms. (So There Is Large Volume)




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OBJECTIVES

• To calculate the maximum pressure surges and check if they are within the limit – deluge valve closure, deluge valve opening and pump trip

• Check the need for vacuum breakers, their position and sizes

• Check stability of the control valve

• Calculate hydraulic transient forces for pipe stress analysis, and positioning pipe supports.




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POINTS OF SPECIAL INTEREST

• Elevation Changes in Offshore Platforms often cause large pressure surges due to cavity formation. Vacuum breakers are used to eliminate them.

• In this system, the large capacity of the bridge connection between the platforms combined with the elasticity of GRP material was instrumental in reducing the pressure surge. GRP is generally thought to be bad for pressure surge but in this case it was good.




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TRANSIENT MODULE APPLICATION SUBSEA PIPELINE SYSTEM – ARABIAN GULF

ZADCO, ABU DHABI




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ZADCO, ABU DHABI

KEY POINTS

• 35 Km Pipeline Transporting Oil From Platform To Tank Farm

• Two Specific Problems– Pipeline Is 25 Years Old And Is Corroded– Water Cut In Oil Is High – Less Compressible –

High Pressure Surge

• Feasibility Analysis Of Leak Detection System




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ZADCO, ABU DHABI

OBJECTIVES

• Determine The Valve Closure Time For Maximum Pressure Of Closed Head Pressure Of Pump Plus 5 Barg

• Determine The Volume Of Oil Leakage With And Without Leak Detection System




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ZADCO, ABU DHABI

• VALVE CLOSURE TIME OF 60 SEC




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ZADCO, ABU DHABI

VALVE CLOSURE TIME – 600 SEC LINEAR




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ZADCO, ABU DHABI

VALVE CLOSURE TIME – 600 SEC QUADRATIC




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ZADCO, ABU DHABI




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ZADCO, ABU DHABI

CONCLUSION

The shut off valve must be closed no faster than 600 sec in quadratic mode




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TRANSIENT MODULE APPLICATION JETTY LOADING SYSTEM

ENGINEERING COMPANY, KOREA




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KEY POINTS

• 5700 M Pipeline From Refinery to Ship

• Carrying Lube Oil

• Maximum Pressure Is Limited to 15 Barg

• Environmental Considerations Are Crucial

• Planned Shut Down As Well As Emergency Shut Down Need to Considered




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OBJECTIVES

• To reduce the maximum pressure to 15 barg.• Consider alternative strategies for reducing the

pressure surge.• Determine the best position for the surge relief device• Calculate the forces on the expansion loop• Optimise the size of surge relief valve




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ALTERNATIVE STRATEGIES

• Two Stage Valve Closure

• Use Surge Relief Valve

• Use Accumulator




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25 Sec Linear Valve Closure




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USE OF SURGE RELIEF VALVE

Pipeline

Shut of f valve

ERC valve

Jetty

Petrochemical plant

Tanker(Closes)

(Remains open)

Surge Relief Valve




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SURGE RELIEF VALVE, CV = 200 (M3/HR, BAR)




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SURGE RELIEF VALVE, CV = 100 (M3/HR, BAR)




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SURGE RELIEF VALVE, CV = 25 (M3/Hr, BAR)




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SURGE RELIEF VALVE, CV = 10 (M3/Hr, BAR)




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POSITIONING OF SURGE RELIEF VALVE, CV = 100 (M3/Hr, BAR)

Pipeline

Shut off valve

ERC valve

Jetty

Petrochemical plant

Tanker(Closes)

(Remains open)

Surge Relief Valve




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POSITIONING OF SURGE RELIEF VALVE, CV = 100 (M3/Hr, BAR)




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TWO STAGE VALVE CLOSURE – NO SURGE RELIEF VALVE

Pipeline

Shut off valve

ERC valve

Jetty

Petrochemical plant

Tanker(Closes)

(Remains open)




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TWO STAGE VALVE CLOSURE – SLOW SECOND STAGE




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TWO STAGE VALVE CLOSURE – FAST SECOND STAGE




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SINGLE STAGE VALVE CLOSURE – WITH ACCUMULATOR

Pipeline

Shut off valve

ERC valve

Jetty

Petrochemical plant

Tanker(Closes)

(Remains open)




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Diameter = 1.0 m, height = 15 m




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Diameter = 0.5 m, height = 10 m




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FORCE CALCULATION AT AN EXPANSION LOOP

PipelineShut off valve

ERC valve

Jetty

Petrochemical plant

Tanker(Closes)

(Remains open)

EXPANSION LOOP

2000M

10M

100M

10M




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FORCE CALCULATION AT AN EXPANSION LOOP




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TRANSIENT MODULE APPLICATION RAS LAFFAN COMMON COOLING WATER SYSTEM

QATAR PETROLEUM




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QATAR PETROLEUM

KEY POINTS 1• Most complex cooling water system ever

designed• Made of GRP material• Main header size in Phase 1 of the project was

3.5 m diameter• Main header size in Phase 2 of the project was

4.5 m diameter• The system has 9 variable speed pumps with

pressure control (7 lead, 2 stand by)• The system (Phase 1) has 190 vacuum

breakers




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QATAR PETROLEUM

KEY POINTS 2• Each pump had a capacity of some 48,000

m3/hr, making a total of 336,000 m3/hr• There were flow control valves in the system• The allowable working pressure had a very

narrow range.– Minimum pressure = -0.3 barg

– Maximum pressure = 6.0 barg

• The system has two receiving basins to stop air flowing back into the system if the pumps tripped

• PIPENET was specified for the project by Qatar Petroleum.




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QATAR PETROLEUM

OBJECTIVES

• To size the receiving basins• To select the vacuum breakers and ensure their

adequacy• To check the stability of the control systems• The users were plants operated by other

companies. It was necessary to guarantee availability of water.

• Optimise the control systems in order to minimise power consumption

• Safe operation under pump trip and valve closure events.




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TRANSIENT MODULE APPLICATION RAS LAFFAN COMMON COOLING WATER SYSTEM, QP

ZOOMED VIEW 1




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ZOOMED VIEW 2




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TRANSIENT MODULE APPLICATIONFIREWATER RINGMAIN SYSTEM TRANSIENT ANALYSIS

EASTERN BECHTEL CO. LTD.




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EASTERN BECHTEL CO. LTD.ZOOMED VIEW 1




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EASTERN BECHTEL CO. LTD.ZOOMED VIEW 2




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EASTERN BECHTEL CO. LTD.

KEY POINTS• Liquefied Natural Gas Plant (LNG)• GASCO, Abu Dhabi• Mixture of Carbon steel, Lined/Unlined and

GRP• Complicated bypass valve arrangement• Pump Startup with no system running• Pump startup with the largest system

running• Pump trip




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EASTERN BECHTEL CO. LTD.Monitor Valve Closing Case




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TRANSIENT MODULE APPLICATIONS IN POWER INDUSTRY

• Turbine Trip/Main Steam System & Re-heat

Systems (Hot & Cold)

• Safety Valve, Pressure Relief Valve Operation

• Pumps in Cooling System Switch or Trip

• Feed Water Pumps Switch or Trip

• HP/LP Bypass System Operation

• Load Change of Boiler Fuel Oil System

• Cooling Water System Valve Closure

• Fire Protection System Operation




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EXAMPLES OF DAMAGE DUE TOWATER/STEAM HAMMER

IN POWER INDUSTRY

• Pipe Rupture

This generally happens at flange connections

• Structure Damage at Pipe Supports

Safety Valve Operating, Turbine Trips and HP/LP Bypass System Operation

• Damage to Pump Impeller and Valve Unit

Cooling Water Systems

• Unstable Operating Conditions

Boiler fuel oil system

• Vibration and Noise




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HOW TO ALLEVIATE WATER/STEAM HAMMER

• Correct Valve Size – neither too big nor too small

• Longer Operating Time – Valve Closure

• Suitable Valve Characteristic Curve – Avoid Ball

Valve

• Surge Protection Devices

Check Valve

Vacuum Breaker Valve

Accumulator

Surge Tank




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TRANSIENT MODULE APPLICATION600 MW SUPERCRITICAL UNIT MAIN STEAM SYSTEM, CHINA

Boiler

HP Turbine

HP Bypass




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TRANSIENT MODULE APPLICATION600 MW SUPERCRITICAL UNIT

HOT REHEATING SYSTEM, CHINA

Boiler

MP Turbine

Condenser




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TRANSIENT MODULE APPLICATION900 MW SUPERCRITICAL UNIT

HOT REHEATING SYSTEM, CHINA

Boiler

HP Turbine




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TRANSIENT MODULE APPLICATION TURBINE TRIP

KEY POINTS

• 600~900 MW Supercritical Unit

• P91 Dn300/420 Main Steam Pipes in 600 MW Unit

• P91 Dn800 Hot Reheat Pipes in 900 MW Unit

• Quick Valve Closure Necessary – 0.15~0.20 Sec

• Severe Dynamic Forces Are Produced After Valves Close

• Dampers Are Used to Stand Hydraulic Transient Forces




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OBJECTIVES

• Estimate Dynamic Forces Caused by Valve Quick Closure.

• Calculation Results Can Be Used by Stress Analysis Software, such as Caesar II, to Evaluate Safety of System.

• Protect Turbine, Boiler, HP/LP Bypass Valves, Pipes, etc.

• Optimize Supports and Dampers.




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CONCLUSIONS

• Maximum Dynamic Force in A 40 m Dn400 Straight Pipe Can Reach Up to 290 KN in 600MW Supercritical Main Stream System.

• Maximum Dynamic Force in A 30 m Dn800 Straight Pipe Can Reach Up to 90 KN in 900MW Supercritical Hot Reheat System.




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TRANSIENT MODULE APPLICATION300 MW SUBCRITICAL UNIT FUEL OIL SYSTEM, CHINA




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TRANSIENT MODULE APPLICATION FUEL OIL SYSTEM

KEY POINTS

• 300 MW Subcritical Boiler with 3X4 Oil Guns.

• Oil Guns Are Operated Group by Group without Regulation.

• Oil Guns Will Lose Pressure and Fuel During Pump Switch or New Oil Guns Are Put into Use.

• Oil Guns May Extinguish If Oil Pressure Drop Below The Allowed Minimum Level.

• Minimum Allowed Pressure Before Oil Guns Is 10 Barg .




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OBJECTIVES

• Valid the Start-up Procedure of Oil Guns.

• Avoid Oil Guns Extinguishing and Protect Boiler.

• Optimize Accumulators to Stabilize Oil Pressure.

• Optimize Control System.




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Scenario 1: Open Four Oil Guns Simultaneously




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Scenario 1: Open Oil Guns

CONDITIONS

• Bottom (A Level) Oil Guns Are Opened.

• Top (C Level) Oil Guns Are Closed.

• Middle (B Level) Oil Guns Are Opened Simultaneously in 3 Seconds.

• Return Oil Is Controlled at 25 Bar Using A PID Controller.




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Scenario 1: Open Oil Guns (1B - 4B) in 0.3s

Oil pressure recovery time is about 20 secondsOil return control valve changes position from 61.5% to 39.5%.




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Flowrate at bottom oil guns decreases about 4.1%Minimum pressure at bottom oil guns is 21.7 bar.




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Flowrate at middle oil guns increases to 1750 kg/hrMinimum pressure at middle oil guns is 20.75 bar.




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Scenario 2: Oil Pump Switch




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CONDITIONS

• All Oil Guns Are Opened.

• Return Oil Is Controlled at 25 Bar Using A PID Controller.

• Oil Pump A Trip in 4 Seconds.

• Oil Pump B Start-up Automatically When The Pressure in Supply Line Is Below 25 Barg.




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Oil pressure recovery time is about 15 secondsMinimum pressure at oil return line is 10.5 barg.




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Minimum flowrate at middle oil guns decreases to 1100 kg/hr.Minimum pressure at middle oil guns decreases to 8.5 barg.




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Minimum pressure at supply drops to 13 barg.




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Scenario 3: Accumulator Installed On Supply Line




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Scenario 3: Accumulator Installed on Supply Line

CONDITIONS

• Same as Scenario 2 but A 280L Accumulator Is Installed on Supply Line.




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Scenario 3: Accumulator Installed on Supply Line

Minimum flowrate at middle oil guns decreases to 1600 kg/hr.Minimum pressure at middle oil guns decreases to 18.0 barg.




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CONCLUSIONS

• Open Oil Guns by The Group of Four Won’t Cause Any Problem to The Fuel Oil System. The Supply Pressure of The Oil Guns Is Above 20 barg.

• Pump Trip and Switch Is A Very Dangerous Case. The Supply Pressure of The Oil Guns May Drop Down to 8.5 barg, Which Is Lower Than The Allowed Minimum Pressure 10 barg.

• Accumulator Can Stabilize Oil Pressure Efficiently.




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PIPENET VISIONSPRAY/SPRINKLER

MODULE

DETAILED DEMONSTRATION

AND

DISCUSSION OF APPLICATIONS




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SPRAY/SPRINKLER MODULE APPLICATIONS

• Deluge systems

• Firewater ring mains

• Foam solution systems

• Sprinkler systems




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SPRAY/SPRINKLER MODULE APPLICATION TERMINAL FIREWATER RINGMAIN SYSTEM

M W KELLOGG, UNITED KINGDOM




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SPRAY/SPRINKLER MODULE APPLICATION TERMINAL FIREWATER RINGMAIN SYSTEM ZOOMED

VIEW




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SPRAY/SPRINKLER MODULE APPLICATIONAIRPORT HANGAR DELUGE SYSTEM

SINGAPORE INTERNATIONAL AIRPORT

891 PIPES730 NOZZLES




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SPRAY/SPRINKLER MODULE APPLICATIONAIRPORT HANGAR FIREWATER SYSTEM

ZOOMED VIEW




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SPRAY/SPRINKLER MODULE APPLICATIONOFFSHORE PLATFORM COMPLEX FIREWATER

SYSTEMDANF PLATFORMS, DENMARK




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SYSTEMDANF PLATFORMS, DENMARK

• Gas Platform Complex In Danish North Sea

• Seven Platforms

• Connected By Bridge Connections

• Complete System in One Simulation

• Input by ISC in Denmark




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SYSTEMZOOMED VIEW




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PIPENET VISION STANDARD MODULE

DETAILED DEMONSTRATION AND DISCUSSION OF APPLICATIONS

• Standard Module Applications and Examples in Process Industry

• Standard Module Applications and Examples in Power Industry




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STANDARD MODULE APPLICATIONS IN PROCESS INDUSTRY


• Steam Distribution Systems

• Ventilation Systems

• Compressed Air Systems

• Seawater Systems

• Closed Loop Systems




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STANDARD MODULE APPLICATIONREFINERY STEAM DISTRIBUTION SYSTEM

RELIANCE INDUSTRIES, INDIA




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KEY POINTS• Jamnagar refinery is one of the biggest

refineries in the world• The larger pipes are more than 1 m

diameter• Calculations done by Bechtel UK• Extension to an existing system• There are several inputs and outputs• The medium is superheated steam




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OBJECTIVES

• Check Line Sizes and Velocities

• Ensure that Minimum Pressure Conditions at Users are Met

• Sizing of Deaeration Let Down Control Valve

• Impact of the Extension to the Existing System




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ZOOMED VIEW 1




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ZOOMED VIEW 2




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ZOOMED VIEW OF RESULTS 1




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ZOOMED VIEW OF RESULTS 2

Pressure along path shown in red




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STANDARD MODULE APPLICATIONPLANT COOLING WATER SYSTEM

QATAR PETROLEUM




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QATAR PETROLEUM

KEY POINTS

• Made of GRP material• Main header size in Phase 1 of the project

was 3.5 m diameter• Main header size in Phase 2 of the project

was 4.5 m diameter• 9 pumps – 7 lead and 2 standby• Each pump had a capacity of some

48,000m3/hr, making a total of 336,000 m3/hr




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QATAR PETROLEUM

OBJECTIVES

• To size the pipes• To select the pumps and ensure their

adequacy under different conditions• To check control systems requirements• The users were plants operated by other

companies. Guarantee availability of water• Optimise the control systems in order to

minimise power consumption




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STANDARD MODULE APPLICATIONPLANT COOLING WATER SYSTEM, QP

ZOOMED VIEW 1




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ZOOMED VIEW 2




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ZOOMED VIEW OF RESULTS




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STANDARD MODULE APPLICATIONBRITISH NUCLEAR FUELS

EXTRACT VENTILATION SYSTEM




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EXTRACT VENTILATION SYSTEM WITH LEAK

25 mm HoleLeak




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KEY FEATURES

• Extract Ventilation System

• Manufacturing Plant for Fuel Elements for Nuclear Power Plant

• Machining Workshop

• Each Machine Individually Ventilated

• Rectangular and Circular Ducts




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OBJECTIVES

• Maintain sufficient negative pressure at machines

• Maintain sufficient flow rate at the machines

• Predict the effect of a leak

• Effect of change in fan speed




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NATURAL CONVECTION VENTILATION SYSTEM




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NATURAL CONVECTION VENTILATION SYSTEMZOOMED VIEW




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STANDARD MODULE APPLICATIONS IN POWER INDUSTRY

• Main/Reheat Steam System

• Condensate/Feed Water Systems


• Steam Distribution Systems

• Fuel Oil System

• Ventilation Systems

• Compressed Air Systems




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STANDARD MODULE APPLICATIONS IN POWER INDUSTRY

• Pipe Sizing

• Pump Optimize

• Pressure Drop Calculation

• Flow Distribution Calculation




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STANDARD MODULE APPLICATION 600 MW SUPERCRITICAL UNIT FEED WATER SYSTEM, CHINA




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STANDARD MODULE APPLICATION FEED WATER SYSTEM

KEY POINTS

• 600 MW Supercritical Unit.

• Dn300/450 Feed Water Pipes.

• 3x50% Feed Water Pump Units.

• Three High Pressure Heat Exchanger.

• Big Heat Exchanger Bypass System.




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STANDARD MODULE APPLICATION FEED WATER SYSTEM

OBJECTIVES

• Select Pipe Size and Calculate Flow Velocity.

• Optimize Pump Head and Capacity.

• Valid Minimum Bypass System.

• Calculate NPSH at Pump Inlet.




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STANDARD MODULE APPLICATION FEED WATER SYSTEMRESULTS 1: FLOWRATE




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STANDARD MODULE APPLICATION FEED WATER SYSTEMRESULTS 2: PRESSURE




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STANDARD MODULE APPLICATION FEED WATER SYSTEMRESULTS 3: VELOCITY




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DIFFERENCES BETWEEN PIPENET AND TWO-PHASE FLOW PROGRAMS

ITEM PIPENET TWO-PHASE FLOW

Thermodynamics Simple Complex

Network Complex Simple

Main Systems Utility systems, firewater systems, surge analysis

Two-phase flow pipelines, process lines

Main applications Steady state (Design), Transient state (Analysis)

Steady State

Priority 1 Fast input of complex networks

Good thermodynamics

Priority 2 Fast calculations and reliable results

Reliable results

pipenet presentation process & power industry (all)

Documents

fluid flow

airvacuum

valve closure

pipe stress

surge relief

transient

transient

stage valve