1 | Building Technologies Program eere.energy.gov The Parker Ranch installation in Hawaii 

# BUILDING TECHNOLOGIES PROGRAM

Distribution Transformers

Energy Conservation Program Christopher Bolduc on behalf of

U.S. Department of Energy

Energy Efficiency & Renewable Energy



## November 3, 20112 | Building Technologies Program eere.energy.gov 

# Draft Life

**- Cycle Cost, Payback Period and National Impacts Analysis** 

**Results for Medium Voltage Liquid**

**- Immersed Transformers** 

Prepared for the Medium Voltage Distribution Transformers Negotiated

Rulemaking Working Group

November 2, 2011

**Contents**

• Life

- Cycle Cost Results for Design Lines 1 – 5

• Payback Period Results for Design Lines 1 – 5

• Materials Selection Results for Design Lines 1 – 5

• National Impacts Results by Efficiency Level for Equipment Classes 1 and 2

• Proposed Trial Standard Levels and Mapping of TSLs to ELs



# • National Impacts Results by Trial Standard Level for Equipment Classes 1 and 2 

# Contents3 | Building Technologies Program eere.energy.gov 

# Design Line 1 LCC Results

Efficiency Level

1 2 3 4 5 6

Efficiency (%) 99.16% 99.22% 99.25% 99.31% 99.42% 99.50%

Transformers with Net Increase in LCC (%) 43.10% 0.00% 0.00% 1.00% 3.10% 26.40%

Transformers with No Impact on LCC (%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%

Transformers with Net LCC Savings (%) 56.90% 100.00% 100.00% 99.00% 96.90% 73.60%

Mean LCC Savings ($) 199 1140 1140 1039 1285 734

Median LCC Savings ($) 43 1140 1140 1038 1199 541

- 1000

- 500 0 500 1000 1500 2000 2500 3000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6Average LCC Savings ($)

Efficiency Level Design Line 1 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average4 | Building Technologies Program eere.energy.gov 

# Design Line 2 LCC Results

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.00% 99.07% 99.11% 99.18% 99.31% 99.41% 99.46%

Transformers with Net LCC Cost (%) 7.63% 17.15% 23.99% 25.79% 35.02% 55.77% 69.39%

Transformers with No Change in LCC (%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%

Transformers with Net LCC Benefit (%) 92.37% 82.85% 76.01% 74.21% 64.98% 44.23% 30.61%

Mean LCC Savings ($) 506 256 83 48

- 103

- 364

- 578

Median LCC Savings ($) 568 552 489 454 218

- 87

- 331

- 3500 - 3000 - 2500 - 2000 - 1500 - 1000

- 500 0 500 1000 1500

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)

Efficiency Level Design Line 2 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average5 | Building Technologies Program eere.energy.gov 

# Design Line 3 LCC Results

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.48% 99.51% 99.54% 99.57% 99.61% 99.69% 99.73%

Transformers with Net Increase in LCC (%) 6.35% 4.00% 1.09% 0.97% 1.42% 3.29% 10.97%

Transformers with No Impact on LCC (%) 1.38% 1.13% 0.02% 0.02% 0.00% 0.00% 0.00%

Transformers with Net LCC Savings (%) 92.27% 94.87% 98.89% 99.01% 98.58% 96.71% 89.03%

Mean LCC Savings ($) 5238 6919 8090 8636 9870 10613 8031

Median LCC Savings ($) 4921 7334 8404 8903 10095 10228 7012

- 5000 0 5000 10000 15000 20000 25000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)

Efficiency Level Design Line 3 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average6 | Building Technologies Program eere.energy.gov 

# Design Line 4 LCC Results

Efficiency Level

1 2 3 4 5 6 7

Efficiency (%) 99.16% 99.22% 99.25% 99.31% 99.42% 99.50% 99.60%

Transformers with Net LCC Cost (%) 0.07% 0.04% 0.04% 0.04% 0.13% 0.99% 11.74%

Transformers with No Change in LCC (%) 0.92% 0.95% 0.95% 0.95% 0.23% 0.00% 0.00%

Transformers with Net LCC Benefit (%) 99.01% 99.01% 99.01% 99.01% 99.64% 99.01% 82.99%

Mean LCC Savings ($) 1544 5171.2 5171.2 5178.6 5210.2 4824 2869

Median LCC Savings ($) 1249 5243.4 5243.4 5252.2 5279.0 4711 2586

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average LCC Savings ($)

Efficiency Level Design Line 4 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average7 | Building Technologies Program eere.energy.gov 

# Design Line 5 LCC Results

**Efficiency Level**

**1 2**  **3 4**  **5 6** 

Efficiency (%) 99.48% 99.51% 99.54% 99.57% 99.61% 99.69%

Transformers with Net Increase in LCC (%) 5.72% 2.47% 2.82% 3.20% 4.90% 26.79%

Transformers with No Impact on LCC (%) 0.14% 0.09% 0.00% 0.00% 0.00% 0.00%

Transformers with Net LCC Savings (%) 94.14% 97.44% 97.18% 96.80% 95.10% 73.21%

Mean LCC Savings ($) 16522 18773 19266 19841 18784 8613

Median LCC Savings ($) 17123 19279 19736 20284 19406 8141

- 20000 - 10000 0 10000 20000 30000 40000

EL 1 EL 2 EL 3 EL 4 EL 5 EL 6Average LCC Savings ($)

Efficiency Level Design Line 5 Average LCC Savings

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average8 | Building Technologies Program eere.energy.gov 

# Design Line 1 PBP Results

Efficiency Level

1 2 3 4 5 6

Mean Payback (Years) 32.6 7.5 7.5 9.9 11.8 20.5

Median Payback (Years) 21.3 7.2 7.2 9.5 11.4 19.3

Transformers having Well Defined Payback (%) 90.30% 100.00% 100.00% 100.00% 100.00% 100.00%

Transformers having Undefined Payback (%) 9.70% 0.00% 0.00% 0.00% 0.00% 0.00%

Mean Incremental First Cost ($) 2,225 2,262 2,262 2,336 2,411 2,604

Mean Operating Cost Savings ($) 198 151 151 149 127 122

0 20 40 60 80 100 120

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6Average Payback Period (years)

Efficiency Level Design Line1 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%9 | Building Technologies Program eere.energy.gov 

# Design Line 2 PBP Results

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 9.2 17.3 22.6 24.5 29.4 34.7 38.4

Median Payback (Years) 5.3 7.3 9.7 12.3 19.5 26.1 30.8

Transformers having Well Defined Payback (%) 98.91% 99.75% 99.35% 99.56% 99.35% 99.48% 99.63%

Transformers having Undefined Payback (%) 1.09% 0.25% 0.65% 0.44% 0.65% 0.52% 0.37%

Mean Incremental First Cost ($) 1,758 2,101 2,272 2,355 2,518 2,678 2,473

Mean Operating Cost Savings ($) 97 92 90 85 76 72 68

0 20 40 60 80 100 120

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)

Efficiency Level Design Line 2 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95%10 | Building Technologies Program eere.energy.gov 

# Design Line 3 PBP Results

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 4.8 4.1 4.9 5.0 6.0 10.2 16.9

Median Payback (Years) 2.7 2.5 3.7 3.9 4.8 8.4 14.4

Transformers having Well Defined Payback (%) 95.18% 97.65% 99.98% 99.98% 100.00% 99.92% 99.67%

Transformers having Undefined Payback (%) 4.82% 2.35% 0.02% 0.02% 0.00% 0.08% 0.33%

Mean Incremental First Cost ($) 4,249 4,247 4,367 4,389 4,515 4,984 5,677

Mean Operating Cost Savings ($) 1,026 949 880 854 782 657 602

0 2 4 6 8 10 12 14 16 18 20

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)

Efficiency Level Design Line 3 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average11 | Building Technologies Program eere.energy.gov 

# Design Line 4 PBP Results

Efficiency Level

1 2 3 4 5 6 7

Mean Payback (Years) 2.3 3.6 3.6 3.6 4.2 8.9 17.4

Median Payback (Years) 2.2 3.4 3.4 3.4 3.8 8.3 16.5

Transformers having Well Defined Payback (%) 98.99% 98.99% 98.99% 99.01% 99.75% 99.89% 94.71%

Transformers having Undefined Payback (%) 1.01% 1.01% 1.01% 0.99% 0.25% 0.11% 0.02%

Mean Incremental First Cost ($) 4,034 4,177 4,177 4,176 4,223 4,580 4,707

Mean Operating Cost Savings ($) 553 375 375 374 367 323 278

0 2 4 6 8 10 12 14

CSL 1 CSL 2 CSL 3 CSL 4 CSL 5 CSL 6 CSL 7Average Payback Period (years)

Efficiency Level Design Line 4 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average12 | Building Technologies Program eere.energy.gov 

# Design Line 5 PBP Results

**Efficiency Level**

**1 2**  **3 4**  **5 6** 

Mean Payback (Years) 5.8 4.9 7.2 8.0 11.2 22.9

Median Payback (Years) 3.4 3.5 5.4 6.2 8.8 19.9

Transformers having Well Defined Payback (%) 97.14% 99.04% 99.91% 99.78% 99.62% 100.00%

Transformers having Undefined Payback (%) 2.86% 0.96% 0.09% 0.22% 0.38% 0.00%

Mean Incremental First Cost ($) 8,549 8,603 8,857 9,015 9,492 9,828

Mean Operating Cost Savings ($) 2,568 2,463 2,357 2,282 2,163 1,709

0 5 10 15 20 25 30 35 40 45

EL 1 EL 2 EL 3 EL 4 EL 5 EL 6Average Payback Period (years)

Efficiency Level Design Line 5 Average Payback Period

Average; Median; Box 25%

- 75%; Whisker 5%

- 95% median

average13 | Building Technologies Program eere.energy.gov 

# Core Materials Selection

Materials Efficiency Level

Basecase 1 2 3 4 5 6

M12

M6

M5 0.0%

M4

M3 100.0% 85.0% 0.0% 0.0%

M2 0.0% 0.0% 0.0% 0.0%

H0

ZDMH 4.6% 0.0% 0.0%

SA1 0.0% 10.4% 100.0% 100.0% 100.0% 100.0% 100.0% Materials Efficiency Level

Basecase 1 2 3 4 5 6 7

M12

M6

M5 0.0%

M4 0.0%

M3 0.0% 0.0%

M2 91.5% 0.0%

H0

ZDMH 0.0% 0.0% 0.0%

SA1 8.5% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 

# Design Line 1 Design Line 2 

# • These results represent the fraction of each core material sampled

in the LCC simulation.

• NULL (blank) values indicate the were no designs available for a

given core material and efficiency level14 | Building Technologies Program eere.energy.gov 

# Core Materials Selection (cont)

Materials Efficiency Level

Basecase 1 2 3 4 5 6 7

M12

M6

M5 0.0%

M4 0.0% 0.0%

M3 88.3% 0.0% 0.0% 0.0%

M2 0.0% 0.0% 0.0% 0.0%

H0

ZDMH 19.3% 0.0% 0.0%

SA1 11.8% 80.7% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%



# Design Line 3

Materials Efficiency Level

Basecase 1 2 3 4 5 6 7

M12

M6

M5 0.0%

M4

M3 91.7% 0.0% 0.0%

M2 7.3% 0.0% 0.0% 0.0%

H0

ZDMH 91.2% 0.0% 0.0% 0.0%

SA1 1.0% 8.8% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%



# Design Line 415 | Building Technologies Program eere.energy.gov 

# Core Material Selection (cont)

Design Line 5

Materials Efficiency Level

Basecase 1 2 3 4 5 6

M12

M6

M5

M4 0.0% 0.0%

M3 24.8% 0.0% 0.0%

M2 64.7% 0.0% 0.0%

H0

ZDMH 3.9% 0.0% 0.0%

SA1 10.6% 96.1% 100.0% 100.0% 100.0% 100.0% 100.0%16 | Building Technologies Program eere.energy.gov 

# National Impacts Summary Results for

MV Liquid

- immersed, by Efficiency Level

Efficiency Level

**1 2**  **3 4**  **5 6**  **7**

Cumulative Source Savings 2044 (Quads ) 0.74 1.21 1.38 1.59 1.96 2.35 2.48

Net Present Value (B 2010$) 3% Discount Rate 5.39 6.23 7.00 9.04 7.26 -0.11 -4.16

7% Discount Rate 0.81 -0.15 -0.37 -0.05 -2.35 -7.56 -10.09 

## Summary Results by Efficiency Level for Liquid

- immersed Transformers

Efficiency Level

Base case 1 2 3 4 5 6 7

Shipments (Billion KVA) 1.95 1.95 1.94 1.94 1.94 1.93 1.92 1.9117 | Building Technologies Program eere.energy.gov 

# Summary Results by EL for Equipment Class 1 

# National Impacts Results for MV

Liquid

- immersed, by Efficiency Level

Summary Results 

# by EL for Equipment Class 2 Efficiency Level

Base 1 2 3 4 5 6 7

Transformer Shipments 2015

- 2044 (Billion KVA) 0.80 0.80 0.79 0.79 0.79 0.79 0.79 0.78

Equipment Cost ($Billions) 44.80

- 3.65

- 8.42

- 10.52

- 12.17

- 19.43

- 25.72

- 29.13

Operating Cost (Savings in TSLs) ($Billions) 41.30 6.55 10.35 11.43 13.31 17.54 19.67 20.78

Cumulative Source Savings 2044 (Quads) 0.45 0.70 0.76 0.87 1.12 1.24 1.31

Net Present Value at 3% Discount Rate ($Billions) 2.89 1.93 0.92 1.14

- 1.89

- 6.05

- 8.35

Net Present Value at 7% Discount Rate ($Billions) 0.25

- 0.97

- 1.74

- 2.04

- 4.54

- 7.16

- 8.57

Efficiency Level

Base 1 2 3 4 5 6 7

Transformer Shipments 2015

- 2044 (Billion KVA) 1.15 1.15 1.15 1.15 1.15 1.15 1.13 1.13

Equipment Cost ($Billions) 20.04

- 1.65

- 3.22

- 3.13

- 2.79

- 3.53

- 11.14

- 13.90

Operating Cost (Savings in TSLs) ($Billions) 35.90 4.15 7.52 9.21 10.69 12.67 17.08 18.09

Cumulative Source Savings 2044 (Quads) 0.29 0.51 0.62 0.71 0.84 1.11 1.18

Net Present Value at 3% Discount Rate ($Billions) 2.49 4.30 6.08 7.90 9.15 5.94 4.19

Net Present Value at 7% Discount Rate ($Billions) 0.55 0.82 1.37 1.99 2.19

- 0.41

- 1.5218 | Building Technologies Program eere.energy.gov 

### Equipment Class (EC) 1 **EC 2**

**DL1 DL2**  **DL3 DL4**  **DL5**

**TSL1** EL 5 EL 1 EL 6 EL 5 EL 4

**TSL2** EL 6 EL 4 EL 7 EL 7 EL 6

**TSL3** EL 4 EL 3 EL 3 EL 2 EL 3

**TSL4** EL 3 EL 1 EL 3 EL 2 EL 2

**TSL5** EL 4 EL 3 EL 4 EL 3 EL 4

**TSL6** EL 6 EL 7 EL 7 EL 7 EL 6 

# Proposed Trial Standard Levels

and Mapping of TSLs to ELs

The following draft Trial Standard Levels are presented for discussion.

Draft Trial Standard Levels (TSLs) Description

1. Minimum LCC / Max NPV

2. Max Energy Savings with positive (or near zero) NPV at 3% discount rate

3. 30% Reduction in Operating Costs

4. Materials constraint ( greatest LCC Savings with M3 steel available as a

design option )

5. Materials constraint plus (gap

- fill between TSL 4 and TSL 6)

6. Maximum Technology19 | Building Technologies Program eere.energy.gov 

# National Impacts Results for MV Liquid

immersed, by Trial Standard Level

**Trial Standard Level**

**1 2**  **3 4**  **5 6** 

Cumulative Source Savings 2044 (Quads ) 1.43 2.06 1.40 1.27 1.50 2.48

Net Present Value (B 2010$) 3% Discount Rate 11.94

- 1.698 6.71 13.22 7.92

- 4.16

7% Discount Rate 2.00

- 7.30

- 0.569 3.27

- 0.302

- 10.09 

### Summary Results by TSL for Liquid

- immersed Transformers

Trial Standard Level

Base case 1 2 3 4 5 6

Shipments (Billion KVA) 1.95 1.94 1.91 1.94 1.95 1.94 1.91



# Draft Trial Standard Levels (TSLs) Description

1. Minimum LCC / Max NPV

2. Max Energy Savings with positive (or near zero) NPV at 3% discount

rate

3. 30% Reduction in Operating Costs

4. Materials constraint (greatest LCC Savings with M3 steel available as

a design option)

5. Materials constraint plus (gap

- fill between TSL 4 and TSL 6)

6. Maximum Technology20 | Building Technologies Program eere.energy.gov 

# Summary Results by TSL for Equipment Class 1 

# National Impacts Results for MV Liquid

immersed, by Trial Standard Level

Summary Results by TSL for Equipment Class 2 Trial Standard Level

Base 1 2 3 4 5 6

Transformer Shipments 2015

- 2044 (Billion KVA) 0.80 0.80 0.79 0.79 0.80 0.79 0.78

Equipment Cost ($Billions) 44.80

- 5.76

- 16.47

- 11.04

- 3.70

- 12.41

- 29.13

Operating Cost (Savings in TSLs) ($Billions) 41.30 11.28 15.47 11.67 9.43 11.09 20.78

Cumulative Source Savings 2044 (Quads) 0.75 0.99 0.78 0.65 0.74 1.31

Net Present Value at 3% Discount Rate ($Billions) 5.51

- 1.00 0.63 5.73

- 1.32

- 8.35

Net Present Value at 7% Discount Rate ($Billions) 0.65

- 3.63

- 1.94 1.17

- 2.82

- 8.57

Trial Standard Level

Base 1 2 3 4 5 6

Transformer Shipments 2015

- 2044 (Billion KVA) 1.15 1.15 1.12 1.15 1.15 1.15 1.13

Equipment Cost ($Billions) 20.04

- 3.68

- 17.10

- 3.13

- 1.70

- 2.19

- 13.90

Operating Cost (Savings in TSLs) ($Billions) 35.90 10.11 16.40 9.21 9.19 11.44 18.09

Cumulative Source Savings 2044 (Quads) 0.68 1.07 0.62 0.62 0.76 1.18

Net Present Value at 3% Discount Rate ($Billions) 6.43

- 0.70 6.08 7.49 9.25 4.19

Net Present Value at 7% Discount Rate ($Billions) 1.35

- 3.67 1.37 2.10 2.52

- 1.52