From: Robert Berman [mailto:bermaneconomics@gmail.com]

Sent: Thursday, October 06, 2011 8:17 AM

To: Brian Coffey

Cc: Alex Hofmann; Andrew Delaski; Aris Marantan; Art Rosenfeld; Bob Saint; Bruce Smith; Caitlin

Johnson; Carlos Gaytan; Caskey, John; Charlie Drexler; Charlie Stevens; Chris Bolduc; Clark Silcox;

Creevy, Jim; Dan Cohen; Daniel Young; Eric Pete rson; Freeman, Jeremiah; Gary Fernstrom; Greg

Coulter; Greg Rosenquist; Hirsch, Bruce R; James Lass; Jennifer Tiedeman; Jerry Corkran; Jerry Hodge;

Jerry Schoen; Joanna Mauer; John Cymbalsky; John Rossetti; Katie Coughlin; Ken Winder; Mahesh P.

Sampat; Matt Miller; Matthew Nardotti; Meg Waltner; Meyers, Aaron; Michael Hyland; Michael Rivest;

Millure, Dave; Phil Harter; Phil Hopkinson; Polinski, Raymond; Puesh Kumar; Richard Parker; Rick

Anderson; Rob Greeson; Robert Berman; Robert va n Buskirk; Robin Roy; Ryan, Paul; Scott Beck;

Simmons, Chuck; Steve Nadel; Steve Rosenstock; Tim Ballo; Tom Eckman; Wes Patterson; Zhimei Luo

Subject: Re: Engineering Data Exchange



### Good Morning Brian,

The most significant design details missing from the spreadsheet are the A & B factors for the

least-cost design of each CSL/dEL/TSL and the no-loa d or core losses and the load or coil losses.

I recommend that the latter be s hown at 75C and that the temperat ure rise also be shown as 75C

rather than 65C. Showing the weight of the core assembly, radiator size and weight and

insulation would also be helpful. The A & B fact ors are the best measure of the costs we are

trying to avoid (not consid ering environmental or social costs) by setting a

particular CSL/dEL/TSL as a MEPS.

Finally, it's not clear why we ar e sill looking at core steel grade below M3 for liquid-filled. My

understanding is that M3 is the lowest grade that can reasonably be used under current standards.



### Regards,

Robert A. Berman, Principal

Berman Economics

www.BermanEconomics.com

1915 Grand Court

Vienna, VA 22182

703

‐ 281

‐ 0490

703

‐ 655

‐ 8398 (cell)

BermanEconomics@gmail.com

On Oct 4, 2011, at 4:10 PM, Brian Coffey wrote:

MV Committee Members,Several of the group have proposed that DOE facilitate a bidirectional exchange of engineering data.

Attached is one kind of template that could be used to compare the ways in which different parties can

achieve certain efficiency levels. DOE would populate the spreadsheet with detailed design information

for the least cost transformers able to achieve the draft efficiency le ve ls using different steels.

Data provided to DOE could then be compared to the DOE designs and differences explained. Because

this data would likely be considered confidential, Navigant is willing to enter into nondisclosure

agreements with any party submitting such data. This process would first be us ed to verify the

engineering analysis of the current representative units and could be expanded to analyze scaling

relationships.

We welcome comments and specific suggestions of how this process could be implemented.

Best,

Brian Coffey

______________________________________________________________ Brian Coffey | Senior Consultant | Energy | Navigant Consulting, Inc.

1801 K Street NW | Suite 500 | Washington, DC 20006

+1.202.481.7521 Office

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### <Engineering Validation Template

‐ 2011 10 04.xlsx>