Seeking help with issues regarding evaporative condensers

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Our factory has an evaporative condenser used to cool alcohol vapor into a liquid. The evaporative condenser is equipped with fans and water nozzles. The length of each condensation tube is 2.5 meters, with a diameter of 25 mm; there are a total of 168 such tubes. The total heat dissipation area of these condensation tubes is 33 square meters. The tubes are fitted with fins, whose diameter is 80 mm and the spacing between them is 10 mm. Each tube has 250 fins. So, 1. What is the effective heat dissipation area of this evaporative condenser in square meters? 2. How effective is the heat dissipation of fins? What is the equivalent cooling area? After use for some time, due to the viscous dust present in the air, this dust adheres to the condensation tubes and fins under the action of the fan, forming a thick layer that is difficult to remove and thus affecting the condensation efficiency. What percentage of the efficiency of a new condenser is there at this point? Can the fins still be useful? If an evaporative condenser with no fins on its condensation tubes is used, and the total heat dissipation area of those tubes is 80 square units, then under the same conditions, which of the two evaporative condensers will perform better?