Thermal analysis of solid deposits on evaporative condensers surface

摘要

The evaporative condensers are components parts of industrial refrigeration equipment. The principal cause of loss of heat transfer in condensers is fouling on the cooling waterside Four types of fouling film can occur - precipitation of hardness salts such as sulfates or earbonales from fiesh water, deposition of suspended solids such as silt or sand, growth of organtsms such as I egionella species, and development of corrosion product films. Note that the first three proeesses affect heat transfer and can promote local corrosion. Corrosion products. on the other hand, have little effect on heat transfer they can however, protect against corrosion and inhibit biological fouling, depending on the metal of the condenser tube. Physico-chemical studies of these deposits are an applied importance because establish the eonditions In which, the rate of these solids formation is minimum and can suggest efficient methods for deposits removal Theoretical importance of these studies consists in the fact that thent delives data for the understanding of solid phase's formation mechanism.