2. 1 Energy-efficient distribution transformers Case study

3. Rome November 242 Energy-efficient distribution transformers PAUWELS Introduction : 4 Distribution transformers for industrial customers 4 Case study of a 1600 kVA energy-efficient transformer  Ward Berghmans Design Manager Distribution Transformers PAUWELS TRAFO

4. Rome November 243 Energy-efficient distribution transformers PAUWELS Topics of discussion : 1. The population of newly installed distribution transformers 2. The 1600 kVA energy-efficient transformer 1. Performance data comparison 2. Annual Energy savings 3. Financial benefits against purchase price 4. Environmental impact 3. Conclusion

5. Rome November 244 Energy-efficient distribution transformers PAUWELS 1.The population of newly installed distribution transformers : 4 Three market segments  Utilities (EdF, Enel, RWE,… )  Light industry ( OEM, installers)  Heavy industry ( private, contractors) 4 Estimated figures for newly installed distribution transformers in Western Europe

6. Rome November 245 Energy-efficient distribution transformers PAUWELS 1.The population of newly installed distribution transformers : * Estimated quantities yr 2000 (3Ø only) *Utilities Light Heavy # pcs60000170006000 MVA Avg kVA 18000 300 13600 800 9600 1600

7. Rome November 246 Energy-efficient distribution transformers PAUWELS 2. The 1600 kVA energy-efficient transformer: 2.1 Performance data comparison o 20 kV / 400 V - 50 Hz – avg loading 70% AC’AMDTDiff. Po (W) 1700 390 -1310 Pk (W) 8330 +0 Mass(kg) 3600 4800 +2200 o Dimensions : +40 mm width / -200 mm length + 125 mm in height

8. Rome November 247 Energy-efficient distribution transformers PAUWELS The annual kWh consumption is obtained by multiplying the watt rating by 8,76 = 11475 kWh annual savings = 1033 € at 0.09 € / kWh 2.2 Annual savings Lifetime saving @ 25 years => 287,5 MWh => 25825 € Remark : 30 or 40 years in service is not uncommon

9. Rome November 248 Energy-efficient distribution transformers PAUWELS => 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

10. Rome November 249 Energy-efficient distribution transformers PAUWELS Efficient use of energy decreases the greenhouse gas emissions without sacrificing power output. 2.4 Environmental impact CO 2 emissions @ 0.4 kg CO 2 / kWh CO 2 reduction = 120 Mt

11. Rome November 2410 Energy-efficient distribution transformers PAUWELS 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)