Diesel particulate filter (DPF) is one of the most effective techniques for the purification of diesel particulate matter (PM). With micro wood fiber as DPF filter material

it has the advantages of high filtration efficiency

low exhaust back pressure and large dust content

but it can not continuous operate under high temperature of 300~400 ℃ and must work with cooling device. In this paper

based on the air cooling design calculation model

the influence of inner diameter

pipe distance

fin height and fin distance on the cooling performance is analyzed to design the tube fin type cooler

which is appropriate to the Lister Petter AA1 diesel engine. Furthermore

the efficiency of the cooling design has been proved by the cooling performance test set up in this research. The results show that the fin tube cooler has good cooling efficiency that the temperature of the exhaust gas can be decreased 220 ℃ and lower)

while the cooler pressure drop is always below 14 kPa.