Steam Trap Survey at a Power Plant: TRAPChecker + SDT270

Importance of Steam Trap Testing

Паровые ловушки (steam traps) — критичный узел любой паровой системы. Для обходного контроля на ТЭЦ применяют режим TRAPChecker на SDT270 или SDT340 — см. также направление «Пар и конденсат» в каталоге SDT. Неработающие ловушки приводят к:

Открытые (failed open)

• Потерю live steam
• Потерю конденсата
• Increased boiler load
• Wasted energy

Закрытые (failed closed)

• "Water hammer" — гидроудары
• Reduced heat transfer
• Equipment damage
• Production issues

Audit Results

Scope

ТЭЦ с 3 котлами и 200+ steam traps

Equipment Used

• TRAPChecker — специализированный detector
• SDT270 — для documentation
• Temperature probe для verification

Testing Methodology

1. Ultrasound Testing

• Contact sensor на trap
• Listening для characteristic sounds:
  • ✅ Working: intermittent clicking
  • ❌ Failed open: continuous steam flow
  • ❌ Failed closed: silence

2. Temperature Verification

• Inlet vs outlet temperature
• ΔT indicates trap condition
• Confirms ultrasound findings

3. Documentation

• Each trap tagged and logged
• Before/after measurements
• Photos и notes

Findings

Condition	Count	Percentage	Loss/Year
Working Properly	142	71%	—
Failed Open	38	19%	$95,000
Failed Closed	12	6%	Risk damage
Unknown	8	4%	—

Total Annual Loss: $95,000

Cost Analysis

Failed Open Traps (38)

Average steam loss:

• Small traps: 10 kg/hr
• Medium traps: 25 kg/hr
• Large traps: 50 kg/hr

Economic impact:

• Steam cost: $25/1,000 kg
• Average loss per trap: $2,500/year
• Total: $95,000/year

ROI Calculation

Item	Cost
TRAPChecker	$3,500
SDT270	$8,000
Training	$2,000
Total Investment	$13,500
Annual Savings	$95,000
Payback Period	<2 months

Recommendations

Immediate Actions

1. Replace all 38 failed open traps
2. Repair 12 failed closed traps
3. Investigate 8 unknown traps

Ongoing Program

1. Quarterly testing of all traps
2. Annual training for maintenance team
3. Database tracking for each trap
4. Replacement schedule based on condition

Best Practices

• Test each trap quarterly
• Document findings
• Set alarm levels
• Plan preventive replacements

Additional Benefits

Beyond Energy Savings

1. Improved process — consistent steam quality
2. Extended equipment life — reduced water hammer
3. Safety — fewer emergency repairs
4. Environmental — reduced carbon footprint

Carbon Reduction

• Steam production: 0.2 kg CO2/kg steam
• Saved steam: 1,520,000 kg/year
• CO2 reduction: 304 tons/year

Implementation Timeline

Phase 1: Immediate (Week 1)

• Test all traps
• Document findings
• Identify failures

Phase 2: Repair (Weeks 2-4)

• Replace failed traps
• Verify operation
• Update database

Phase 3: Program (Month 2+)

• Quarterly testing schedule
• Training refreshers
• Continuous improvement

Conclusion

Steam trap testing с TRAPChecker и SDT270 provides:

• Quick payback (<2 months)
• Significant energy savings ($95K/year)
• Reduced downtime
• Extended equipment life
• Environmental benefits

Recommended для любой facility со steam systems.