MAN Engines

The new MAN E3872 gas engine

MAN E3872 gas engine

44.0 % efficiency and 735 kW power from just 12 cylinder displacement

MAN Engines is significantly extending its power range for stationary gas engines upwards. At the same time, we are staying true to our high power density philosophy. The result is the new E3872 series with its impressive power of 735 kWmech from just 12 cylinders.The effective mechanical efficiency achieved by the natural gas version at 50 Hz is equally spectacular: a striking 44.0 %.

The new MAN E3872 stationary gas engine

Optimum performance from just 12 cylinders.

  • The new MAN E3872 stationary gas engine design has a bore of 138 mm and a stroke of 165 mm.
  • With 29.6 litres of displacement and just 12 cylinders, it achieves a maximum power of 735 kWmech.
  • The effective mechanical efficiency of the natural gas version at 50 Hz is an impressive 44.0 %.
  • As a result, the 4-stroke petrol gas engine is designed for power and heat generation.
  • There is a wide range of applications: From the agricultural and municipal sectors, hotels and hospitals, to industrial plants.

KEY NEW FEATURES OF THE MAN E3872 STATIONARY GAS ENGINE

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Highly efficient single turbocharger

Highly efficient single turbocharger

By fine-tuning the inlet and outlet guide vane units (diffuser and nozzle ring), the turbocharger can be operated at the compressor and turbine’s exact optimum efficiency. This reduces the charge cycle work.

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M18 prechamber spark plugs

M18 prechamber spark plugs

They are specially adapted for the combustion chamber. In the newly designed combustion chamber, ignition of the gas now occurs at several locations. This has a positive impact by accelerating combustion. In addition, there are further improvements to combustion stability during low-NOx operation.

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Camshaft with Atkinson cycle

Camshaft with Atkinson cycle

Rather unusual for stationary engines, but with a major positive impact on efficiency

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Steel pistons

Steel pistons

With their trough-like geometry, they help to accelerate combustion and thus increase efficiency.

/
Highly efficient single turbocharger

Highly efficient single turbocharger

By fine-tuning the inlet and outlet guide vane units (diffuser and nozzle ring), the turbocharger can be operated at the compressor and turbine’s exact optimum efficiency. This reduces the charge cycle work.

/
M18 prechamber spark plugs

M18 prechamber spark plugs

They are specially adapted for the combustion chamber. In the newly designed combustion chamber, ignition of the gas now occurs at several locations. This has a positive impact by accelerating combustion. In addition, there are further improvements to combustion stability during low-NOx operation.

/
Camshaft with Atkinson cycle

Camshaft with Atkinson cycle

Rather unusual for stationary engines, but with a major positive impact on efficiency

/
Steel pistons

Steel pistons

With their trough-like geometry, they help to accelerate combustion and thus increase efficiency.

MAN E3872
Hydraulic valve lash adjuster

Hydraulic valve lash adjuster using the example of the MAN D2676

As an additional customer benefit, MAN Engines equips the E3872 with a hydraulic valve lash adjuster (HVA). This makes regular checking and adjustment of the valve train unnecessary. Machine operators will benefit from the elimination of routine maintenance intervals and the resulting costs.

Operation with natural gas with NOx emissions = 250 mg/Nm³ (5 ref. vol. % O2)

Fuel   Natural gas
Frequency   50 Hz
Arrangement/number of cylinders   V12
Bore mm 138
Stroke mm 165
Displacement l 29.6
Effective rated power kWmech 735
Nominal speed rpm 1,500 (50 Hz)
Mean effective pressure bar 19.9
Exhaust status NOx
(with 5 % residual oxygen)
mg/Nm3 250
Effective mechanical efficiency
(at NOx =250 mg/Nm3; 5 % O2)
% 44.0
Engine length mm 1760
Engine width mm 1245
Engine height mm 1410
Weight (dry) kg 2160

Last updated: 28/10/2021

A version for markets requiring speeds of 1,800 rpm (60 Hz) is also planned. As part of the process of converting our stationary natural gas engine range to “hydrogen readiness”, the new MAN E3872 will be designed to accommodate a hydrogen (H2) admixture when operated with natural gas.

To press release “Hydrogen Readiness”

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