IEEE EnergyTech 2012 Conference
Thursday, May 31 2012
DC MICROGRIDS:
A DIRECT ROUTE TO ENERGY
EFFICIENCY
John H. Jahshan, Director of Engineering
Nextek Power Systems
Zero Energy Buildings (ZEB)
Buildings that produce as much energy as they use
What’s likely to change in the approach to design/build?
1. Integrated design and operations planning
2. Site renewable energy strategies get maxed out
3. Energy Storage technology will allow Grid
independence breakthroughs
4. System Intelligence - More control, monitoring,
verification of everything
2030: All new commercial buildings
2040: 50% of commercial building stock
2050: All commercial buildings
Source: EISA 2007,Title 4, Subtitle B, Section 422c
EMerge Alliance Corp - ©2009-2010
SOLUTION:
A simplified AC/DC hybrid coupled power network
ELECTRO-ACTIVE DEVICES
ENERGY SOURCES
DC
Photovoltaic
Coupled
AC/DC Power
Sources
▲
Electronic
Lighting
AV/IT Devices
DC Power
Distribution
Management
AC/DC Site
Generation
DC Wind
Power
DC Campus Fuel
Cells
▼
Wireless
Controls
BACnet
TCP/IP
AC Line Power
HVAC Actuators
Sensor & Controls
Data & Telecom Centers
Security & Safety
OPPORTUNITY:
Up to 30% less energy, 15% less capital, 200% plus more reliable
Source:
EMerge Alliance Corp - ©2009-2010
Too Many Inefficient Power Conversions
“Taking the Long Way Around”
DC / Semiconductor
Based Loads
DC
AC
DC
AC
DC
DC
AC
AC
DC sources
AC
DC
DC
AC
AC
AC
DC
DC storage
AC Grid
Direct Coupling® / DC Microgrid
SIMPLE EFFICIENT DIRECT
DC / Semiconductor
Based Loads
DC
DC AC
DC
DC
DC sources
DC
DC
DC
DC
DC storage
AC Grid
•
•
•
•
•
•
•
Lower Operating Expense
Safer
Higher Efficiency
Fewer Components
More Reliable
Less Real Estate
Reduced Carbon Footprint
Direct Coupling®
DC Microgrid Drivers & Benefits









REDUCED ENERGY COSTS
SECURITY AGAINST HIGHER UTILITY COSTS
MORE EFFICIENT ENERGY USE (10% TO 40%)
MORE RELIABLE SERVICE
SAFER POWER AT 24V
HIGHLY SCALABLE SYSTEM DESIGNS
FLEXIBLE ‘PLUG & PLAY’ COMPONENTS
REDUCED FUTURE RENOVATION COSTS
MEASURED 50% REDUCTION IN
INSTALLATION, MOVES AND CHANGES
BOTTOM LINE…
DO MORE WITH YOUR ENERGY®
Founding & Governing Member of
The EMerge Alliance
®
“An open industry association
developing standards leading to the
rapid adoption of DC power
distribution in commercial buildings”.
The EMerge Alliance
Nextek – Governing Member
®
Governing Members
The EMerge Alliance System
®
24VDC – Class 2 Wiring – Energized Ceiling
Nextek Power Systems Products
Power Servers
• 24V PSM-1600
• 24V PSM-1600 ALT
• 380V PSM-1600
• MPPT
DC Ballasts
• Popular lamp types including T5, T8 & CFL
• High Efficiency
• 24V & 48V styles
• 24V Emergency Ballast
• Dimmable
DC Fans-Nextek Fanworks
• 12/24V DC Powered ceiling fans
• Vari-Cyclone and Vari-Fan styles
• Speed Controller available
Thomas Edison was right!
“I’d put my money on sun and solar
energy. What a source of power! I hope
we don’t have to wait until oil and coal
run out before we tackle that."
~Thomas Edison, 1880’s
Now Let’s Hear From The Rest of the
Panel…
For more information:
John H. Jahshan
John.Jahshan@nextekpower.com
www.nextekpower.com