Generator labyrinth air intake

What is a diesel generator air intake & exhaust system?

The diesel generator air intake and exhaust system (DGAIES) provides the diesel engine with combustion air from the outside. The combustion air passes through a filter and silencer before being compressed by a turbocharger and cooled by the coolant system before entering the individual cylinders for combustion.

How should a generator be ventilated?

Preferably, the source of ventilation air should be as low as possible and the air should flow over the entire generator set, thereby cooling the alternator, engine block, and radiator (for sets with unit-mounted radiators) to remove the after-cooler and jacket-water heat.

Does a generator intake need cool air?

It is important to note that cooling air is needed for more than just the engine; the generator intake also requires cool clean air. The most effective way to do this is to provide a ventilation air source low to the ground at the rear of the package.

What size air intake opening should be?

Opening ‘A’ should be sized to maintain air velocity through the openings below 610 m/min (2000 ft/min). The engine room must have openings for air to enter. The intake air opening should be located forward of, and, if convenient, at a lower elevation, than the discharge.

How to calculate dilution at the intake?

Once htop is defined and is calculated, dilution at the intake is calculated from When plume height is less than the height of intakes, active obstacles, and recirculation zones (i.e., hplume htop), then = 0 and dilution should be calculated using Equation (23).

How can outdoor air intakes improve indoor air quality?

For more information, see ASHRAE’s (2003) Risk Management Guidance for Health, Safety, and Environmental Security under Extraordinary Incidents. Carefully placed outdoor air intakes can reduce stack height requirements and help maintain acceptable indoor air quality.