Unlimited Power, Flexible Fuel Sources.

S3000 Stationary Dual Fuel SystemDrilling & Fracturing Applications

• annual fuel savings of 20% ‐ 45%

• operation on conditioned well‐head, pipeline, LNG or CNG

• natural gas sources

• peak diesel displacement up to 75%

• average diesel displacement between 40%‐ 55%

• no limit on horsepower

• compliance to EPA emission standards

• safe & non‐invasive technology

• ability to transition to 100% diesel fuel anytime

APG Diesel Dual Fuel Systems Provide

May 2014

Turbocharged Natural Gas® Dual Fuel Systems

Introduction to S3000 Flanged Gas Train SystemsTurbocharged Natural Gas® Dual Fuel Systems

BackgroundThe American Power Group (APG) Dual Fuel system is a patented aftermarket upgrade system which seamlessly meters natural gas into the induction system of a diesel engine.

S3000 Dual Fuel configuration does not change any of the OEM diesel engine components. APG’s Electronic Control Unit (ECU) monitors many base engine functions within the OEM engine system such as coolant temp, exhaust gas temp, load/manifold absolute pressure, etc., either through serial communication [the Controller Area Network (CAN) system (“read only”)] and/or through APG installed sensors.

The Dual Fuel controller will not allow natural gas to flow unless the base engine parameters are within normal operating range, therefore “cold” engine start‐up is on 100% diesel fuel. The conventional diesel engine governor controller acts to reduce diesel fuel flow as natural gas is introduced to maintain requested engine speed/load.

APG’s system is non‐invasive to the OEM diesel engine and takes a read only position to the OEM CanBus network. If for any reason, the engine parameters are not within standard operating range, as programmed in the APG ECM, the APG Mixed‐Fuel system turns off the NG flow and returns the engine back to 100% diesel fuel operation.

APG Gas TrainFrom the fuel source, the APG Dual Fuel system gas train is comprised of a gas filter, zero governor regulator, dual solenoid shut off valve, variable fuel metering valve and induction gas mixer upstream of the diesel engine turbocharger and intake manifold.

APG Control SystemAPG’s ECU monitors all engine parameters through the CAN access or installed sensors and operates the natural gas fuel control valve and variable fuel metering valve for seamless operation. Operational information is available through a Remote Display Unit (RDU).

Operational Fuel CostDepending on the natural gas fuel source, we expect an average range of 40% ‐ 55% displacement, with peak displacement up to 75%, allowing end users to see a significant reduction in fuel costs.

Detroit‐based powertrain engineers designed and tested APG’s patented 3rd generation Turbocharged Natural Gas® Dual Fuel Technology

• Transitioned from hard‐wired sensors to digital read‐only engine controller• Incorporated a wider‐range variable fuel‐metering system• New air mixer to improve methane‐enriched air thru turbocharger• Extensive software mapping of natural gas for power & emissions• Applicable for all 4‐cycle diesel engine models‐ no limit on horsepower

Oil & Gas IndustryDrilling & Fracturing Applications

S3000 Dual Fuel Upgrades: Tested and Compliant to EPA Emission Standards

CUR

REN

T

OEM Model Tier Gas Source

Cat3508

3512C3512CHD

3516

C-15C-18C-27C-32

C-175

II Well-head & Pipeline Quality Gas

MTU 12V400016V400020V4000

II Well-head & Pipeline Quality Gas

Detroit Diesel Series 60 II & III Well-head & Pipeline Quality Gas

PEN

DIN

G

Cat C-11C-13

II

MTU 12V2000 16V200018V2000

II

Cummins QSK45QSK50

II

Oil Rig Generator (740 kW each)Estimated Run Hours / Year 3,000 hoursDiesel OnlyEstimated Diesel Consumption 53.5 gallons / hourAnnual Diesel Consumption 160,500 gallonsAnnual Cost @ $3.00 / gallon $481,500 / year

Dual Fuel @ 55%Annual Diesel Consumption 77,642 gallonsAnnual Cost @ $3.00 / gallon $232,926 / yearGas: 40/ccf per hour x 3,000 hrs 120,000 ccfAnnual Cost @ $0.30 ccf* $36,000 / year

Total Annual Dual Fuel Costs Per Unit $268,926/year

Estimated Annual Savings Per Unit $212,574 (44%)Total Savings (3 gensets per rig) $637,722Incremental Payback < 3 months*Treated well-head methane

Benefits Robust system: Wider range of dual fuel operation – high uptime Flexibility to operate diesel engines on 100% diesel if natural gas is not available

Customer references available upon request

Contact American Power Group Ed Wolf ph 1.515.395.1360 ewolf@americanpowergroupinc.com www.americanpowergroupinc.com

Customer Payback ModelTurbocharged Natural Gas® Dual Fuel Systems