In the present work, a new model for predicting the pressure drop of dust loaded medium performance air filters is proposed by introducing the collection efficiency raising factor, λ , the pressure drop raising factor, β , and the pressure drop raising exponent, γ , and the applicability of the model is experimentally investigated. As a result, it is found that, i) the pressure drop raising exponent γ is about 1.3, the value of which is common for all the filtration conditions studied in the present work, ii) there exists a strong correlation between λ and β , and therefore it is possible to predict the time dependency of pressure drop from that of collection efficiency or
vice versa.
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