Improving fossil power plant efficiency

The opportunity

• Control valves are critical to power plant performance

• Recent studies have shown a 2% to 5% improvement in plant performance by eliminating control valve problems

• Even a 2% improvement in a 1000 MW station translates to a gain of over $3 million every year

Fossil plant - external

Fossil plant - cutaway

Fossil plant - process

Control valves are important

• MW-capacity

• Reliability

• Availability

• Minimum sustainable load• Heat rate - at full load and

at part-load

• Stability of control

• Startup time

• Response to the grid

• Equipment health

• Power quality

• Maintenance

CONTROL VALVES

AFFECT ALL

THESE AREAS

Common valve problems

Pipe vibration

Noise

Poor control

System shutdown

Trim and body wear

Lost production

High maintenance

Downstream pipe erosion

Valve failure is expensive

Visible costs

• Expensive downtime (lost revenue)

• Maintenance cost & time

• Loss in production/capacity

Invisible costs

• Penalty in heat rate/high operating cost

• Longer time for startup

• Lower unit availability

• Collateral damage to other equipment

• Limited flexibility in operation

Applications in fossil power plants

Focus on severe service applications:• Turbine bypass• Main and booster feedpump recirculation• Start-up and main feedwater regulation• Deaerator level control• Sootblower control • Spray water control & desuperheaters• High level heater drains• Auxiliary steam• Start-up system• Venting to atmosphere valve and resistor• Blowdown - continuous & intermittent

Valve hierarchy in fossil power plants

Severe Service

Other control valves

Othervalves

Number of valves (per 600MW plant)

30-35 300+ 1000s

Value of contract (600MW plant)

$3-3.5m $2.5-3m $varies

Severe service = most critical = highest value

IMI Severe Service market position

• Leader in critical turbine bypass systems and other severe service valves for fossil power plants

• Over 100 years worldwide experience in boiler-related equipment

• Trusted partner to major power companies and equipment suppliers

• Market position supported by proactive customer service

Customer comments

Commonwealth Edison (Quad I&II)“6 MW gain was achieved by retrofitting the heater drain valves”

(Engineer)

Taiwan Power Company, Kuosheng 1 & 2“24 Megawatt gain was realized by replacing the main feedpump (MFP) recirculation valves”

(Engineer)

Dominion“We have used CCI valves for years in our Boiler Bypass system and they have performed fantastically. They have saved us a lot of money over the years”

(Director)

Central Nuclear Vandellos“Main feedwater control valves (MFCV) retrofitted with DRAG® technology solved the control problems; a bonus while solving the control problems was a 2 Megawatt savings”

(Engineer)

In summary

• Increasing world energy needs

• Fossil power is critical to meeting electricity demand

• Products and services are critical to plant efficiency

• Leader in critical control valves for power applications