Bison 4DW91-29D - Air Inlet and Exhaust System

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③ Generally, the ideal temperature difference between the inlet and outlet of the water tank is within
6-10℃. The wind velocity is 6-10m/s. The speed of fan blade rim must not exceed 90m/s. The effective
cooling air volume required by the diesel engines at power station is 1.1-1.4 m3/min•kW. And the area
of the water tank facing the wind is 0.35-0.40/m2/100Kw.
The specific radiation area of water tank is 0.35-0.50m2/Kw.
7.Air inlet and exhaust system of diesel engine
Selection of air inlet and exhaust system is one of the most important factor affecting the engine power
and its service life.
(1) Air filter. Choose correct air filter according to the working environment of the diesel engine. For
engines operating indoors or in regions with less dust, paper air filter without centrifugal rough filter can
be used. It is recommended to use dry air filter with centrifugal rough filter in dusty area.
The flow rate of air filter and the diameter of the connecting air pipe should be selected according to the
air inlet flow rate specified in the specification data of diesel engine. At rated power, the air inlet
resistance of the new air filter must be less than 2.5kPa.
The rated flow rate of air filter used in each engine model is listed in the table below.
Model Rated flow rate of air filter(m
3
/h) Original resistance (kPa)
4DW81
4DW91
4DW92
4DW93
4DX21
4DX22
4DX23
≥240
≥240
≥240
≥240
≥240
≥350
≥350
≤2.5
≤2.5
≤2.5
≤2.5
≤2.5
≤2.5
≤2.5
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