Energy-efficient distribution transformers

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Energy-efficient distribution transformers

• Case study

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Introduction

• Distribution transformers for industrial
  customers
• Case study of a 1600 kVA energy-efficient
• transformer

• Ward Berghmans
• Design Manager Distribution
  Transformers
• PAUWELS TRAFO

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Topics of discussion

• The population of newly installed distribution
  transformers
• The 1600 kVA energy-efficient transformer
• Performance data comparison
• Annual Energy savings
• Financial benefits against purchase price
• Environmental impact
• Conclusion

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1.The population of newly installed
distribution transformers

• Three market segments
• Utilities (EdF, Enel, RWE, )
• Light industry ( OEM, installers)
• Heavy industry ( private, contractors)
• Estimated figures for newly installed
  distribution transformers in Western Europe

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1.The population of newly installed
distribution transformers

• Estimated quantities yr 2000 (3Ø only)

Utilities Light Heavy
pcs 60000 17000 6000
MVA Avg kVA 18000 300 13600 800 9600 1600
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2. The 1600 kVA energy-efficient
transformer

• 2.1 Performance data comparison
• 20 kV / 400 V - 50 Hz avg loading 70

AC AMDT Diff.
Po (W) 1700 390 -1310
Pk (W) 8330 8330 0
Mass(kg) 3600 4800 2200

• Dimensions 40 mm width / -200 mm length
  125 mm in height

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2.2 Annual savings
The annual kWh consumption is obtained by
multiplying the watt rating by 8,76 11475
kWh annual savings 1033 at 0.09 / kWh

Lifetime saving _at_ 25 years gt 287,5 MWh
gt 25825
Remark 30 or 40 years in service is not uncommon
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gt within 12 to 15 of the total life time of a
distribution transformer
2.3 Financial benefits against purchase price
Price premium 3610 Payback period
3610 / 1033 /yr 3.5 years
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2.4 Environmental impact
Efficient use of energy decreases the
greenhouse gas emissions without
sacrificing power output.
CO2 emissions _at_ 0.4 kg CO2 / kWh CO2
reduction 120 Mt
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3. Conclusion
Today the technology is available to reduce
in a substantial way the losses of transformers.
This loss reduction would contribute in the
overall green house cut-back programs
This case study was based upon the 1600 kVA
transformer installed in July 1998 at the Allied
Signal production facility at Waterford (Eire)