Caterpillar: Confidential Green Caterpillar’s Large Power Systems Solutions for Diverse Requirements David Frohberg Chief Engineer Caterpillar, Inc April 12, 2018
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Caterpillar: Confidential Green
Caterpillar’s Large Power SystemsSolutions for Diverse Requirements
David FrohbergChief EngineerCaterpillar, IncApril 12, 2018
Caterpillar: Confidential Green
Why Consider Natural Gas Standby/Load Management Power?
• Resiliency• Sustainability• Reduced Costs• Flexibility/Independence
Caterpillar: Confidential Green
Caterpillar: Confidential Green
Utility Demand Response with Increased Usage of Renewables
Caterpillar: Confidential Green
• Natural gas…plentiful, clean burning, lower CO2impact
• No on site storage of diesel fuel
• Emission compliance with little or no aftertreatment
Sustainability
5
Caterpillar: Confidential Green
• Gas CapEx is typically 1.5 – 2X of emergency diesel
• Gas CapEx similar to non-emergency use diesel
Diesel vs Gas CapEx
Diesel Gas Diesel Gas
Emergency Use Non-Emergency Use
CA
P E
X (
$)
CA
P E
X (
$)6
Caterpillar: Confidential Green
• Fewer maintenance intervals with gas
• Gas fuel consumption better than diesel
• Fuel cost in favor of natural gas
Lower OpEx with Natural Gas
Assumptions
Diesel: $2.50/gal
Gas: $4/MMBTU
$ / k
W-h
r
0
0,05
0,1
0,15
0,2
0,25
Diesel Gas
Operational Expense
Fuel O&M
7
Caterpillar: Confidential Green
UTILITYLife Safety
CBATS
Legally Required
Standby
Optional Standby
Systems
≤10Equipment Protecting
People Leaving a Building
Equipment Aiding Rescue Workers
& Mandatory Building Functions
Does Not Protect People,
Protects Business
NFPA 110 Level 1 Type 10
NFPA 110 Level 1 Type 60
Natural Gas for Standby
CBATS
CBATS
Without PowerSeconds
Unregulated Time
≤60Without Power
Seconds
Without Power
8
Caterpillar: Confidential Green
Gas Genset Built for Fast Starting
Eng Op State
Eng Spd
Nominal Startup Time to 1800rpm = 6.5s
0.4s to start crank
2.1s to crank
4.0s to accelerate
9
Gas Genset Starting Video
Caterpillar: Confidential Green
Gas Genset Built For Transient Performance
250,0
300,0
350,0
400,0
450,0
500,0
550,0
0 5 10 15 20 25 30 35 40 45 50
Vol
tage
(V
)
Time (sec)
Diesel vs Traditional Gas vs Standby Gas Volt. Recovery – 75% Load Step
Traditional Gas
Gas Standby
Diesel Standby38% Dip33% Dip
28% Dip
10
Caterpillar: Confidential Green
• Select best thermodynamic cycle
• Design focus on speed acceleration
• Fast start fuel system and air fuel ratio control
• Transient air fuel ratio control
Gas Genset Built For Transient Performance
11
Caterpillar: Confidential Green
Energy Independence – Caterpillar Microgrid Solutions
12
Caterpillar: Confidential Green13
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