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Finally, an effective and economical solution to Wet Stacking and generator reliability in extreme cold conditions. 

The condition of wet stacking causes a situation where all the fuel is not burned.  The ‘excess’ fuel passes on into the exhaust side of the turbocharger and on into the exhaust system.  The fuel-laden exhaust pipe is therefore a "wet stack".  In diesel generators, it is usually because the diesel engine is running at only a small percentage of its capacity.  The LHG provides the benefit of putting a load on the generator, thus reducing the impact of wet stacking.  Furthermore, in cold-weather environments, the heavy-duty arctic LHG600 keeps the diesel engine at optimal operating temperatures, creating efficiencies and preserving engine life.

It is detectable when there is a black oily deposit around exhaust pipe connections and around the turbocharger. Continuous black exhaust from the stack when under a constant load is also an indication that all the fuel is not being burned.

When unburned fuel is exhausted out of the combustion chamber, it starts to build up in the exhaust side of the engine, resulting in fouled injectors and a buildup of carbon on the exhaust valves, turbo charger and exhaust.

Excessive deposits can result in a loss of engine performance as gases bypass valve seats, exhaust buildup produces back pressure, and deposits on the turbo blades reduces turbo efficiency.

Permanent damage will not be incurred over short periods, but over longer periods, deposits will scar and erode key engine surfaces.

Also, when engines run below the designed operational temperature, the piston rings do not expand sufficiently to adequately seal the space between the pistons and the cylinder walls. This results in unburned fuel and gases escaping into the oil pan and diluting the lubricating properties of the oil, leading to premature engine wear.

Why avoid Wet Stacking?

  • Wet Stacking shortens engine life by many years and before planned replacement.
  • Wet Stacking causes Pollution. Many urban areas restrict the level of smoke emissions wet stacking produces.
  • Wet Stacking diminishes engine power as even before an engine is damaged, deposits will reduce maximum power. A prematurely worn engine will have a lower maximum power than it was designed to develop.
  • Wet Stacking increases maintenance costs. An engine experiencing wet stacking will require considerable more maintenance.

Ventech’s LHG has been proven on generator systems operating as far north as Prudhoe Bay on the Northern Slope of Alaska.  Kits are available for various diesel generator systems, including the Wacker Neuson G-series of diesel generators.

”The Wacker G50 that had the LHG installed on it shows no sign of cold stacking in the exhaust. To the contrary it burned cleaned and looks like a unit that would have been under a decent load. The oil shows no sign of excessive carbon also consistent with keeping the unit under a load thus creating higher ring pressure and exhaust gas temperatures. The unit has run for 1400+ hours in the field and all signs indicate that it did exactly what we hoped…”

- Maurice Vachon, Brice Equipment, Prudhoe Bay, Alaska

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