Abstract
Increasingly the market offers new and used equipment spray booths with cross-recuperators. An attempt is made here to model the heat recovery efficiency decrease in spray booths and a preliminary theoretical analysis is presented. The heat recovery reduction is due to overspray particles deposited within the extraction ducts and heat exchanger walls. The average filtration efficiency degree of the paint stop filters is 93–97%. Filters do not provide complete cleaning of the air from the overspray particles and the growing sediment layer on the recuperator walls is a good thermal insulator. Studies of the deposit layer formation intensity and its thermal conductivity are ongoing.
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