Generators operate on gas with variety of methane levels.
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Press Release Summary:
Driven by electronically controlled, lean-burn gas reciprocating engines, Cat® G3500E Series natural gas-fueled generator sets operate on Miller Combustion Cycle. They deliver mechanical efficiency up to 44.5% due to camshaft and turbocharger design. Models G3516E and G3520E are 16- and 20-cylinder units operating at 50 Hz/1,500 rpm and 60 Hz/1,200 rpm respectively. Both incorporate ADEM(TM) III digital microprocessor control and air/fuel ratio control.
Original Press Release:
Caterpillar Introduces New World Class Natural Gas Generator Sets that Operate on Gas with Wide Variety of Methane Levels
Peoria, IL - The new Cat® G3500E Series of advanced natural gas-fueled generator sets from Caterpillar Inc. is designed for maximum efficiency in extended-duty distributed generation and combined heat and power (CHP) applications.
The E-Series power generation units are driven by Cat electronically controlled, lean-burn gas reciprocating engines. Operating on the Miller Combustion Cycle, they deliver extremely high mechanical efficiency - up to 44.5 percent - with flexibility to operate on pipeline natural gas with a wide range of methane numbers at no sacrifice of efficiency or performance. The first units in the E-Series are:
16-cylinder G3516E, operating at 50 Hz/1,500 rpm and rated at 1600 kW and 43.5 percent mechanical efficiency without water pumps.
20-cylinder G3520E, operating at 60 Hz/1,200 rpm and rated at 1600 kW and 43.5 percent mechanical efficiency with water pumps.
The 50 Hz model has standard NOx emissions of 500 mg/Nm3 (TA Luft) or 250 mg/Nm3 (1/2 TA Luft). The 60 Hz models have standard NOx emissions of 1.0 or 0.5 g/bhp-hr.
"The G3500E Series generator sets are designed specifically for applications in which low long-term operating cost is the key driver of return on investment," says Michael A. Devine, gas product marketing manager with the Electric Power Group of Caterpillar Inc. "Those include continuous-duty or high-annual-hours CHP and distributed generation service."
Engines in the G3500E Series use an advanced camshaft and turbocharger design to achieve high mechanical efficiency. The units are built on heavy-duty diesel-based platforms and are designed to operate reliably and efficiently with minimal operator attention. They feature an open combustion chamber design and a low-pressure fuel system (0.5 to 5 psi/ 10 to 35 kPa). Other key attributes include:
ADEM(TM) III digital microprocessor control, which automatically and precisely regulates ignition, engine governing and air/fuel ratio for optimum fuel economy and stringent NOx control.
A technologically advanced air/fuel ratio control that monitors charge air density and maintains NOx within tight tolerances under all ambient and load conditions and is immune to changes in air temperature and humidity.
Individual-cylinder detonation sensing and timing control.
A prechamber-type spark plug design for extended service life without adjustment.
For more information about Cat generator sets or to find a Caterpillar® dealer in your area, call Caterpillar at (800) 321-7332, visit www.cat-electricpower.com or email cat_power@cat.com.
About Caterpillar Inc.
For more than 75 years, Caterpillar Inc. has been building the world's infrastructure and, in partnership with its worldwide dealer network, is driving positive and sustainable change on every continent. With 2003 sales and revenues of $22.76 billion, Caterpillar is a technology leader and the world's leading manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. More information is available at www.cat.com.
