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WATER-COOLED DEVICES
Special requirements for open and half-open cooling systems:
Requirement Description
Impurities Mechanical impurities in half-open cooling systems can be counteracted when ap-
propriatewaterltersareused.
Salt concentration The salt content can increase through evaporation at half-open systems. Thus the
water is more corrosive. Adding of fresh water and removing of process water
works against.
Algae and myxobacte-
ria
Algae and myxobacteria can arise caused by increased water temperature and
contactwithatmosphericoxygen.Thealgaeandmyxobacteriaclogtheltersand
obstructthewater-ow.Biocidecontainingadditivescanavoidthis.Especiallyat
longer OFF periods of the cooling circuit preventive maintenance is necessary.
Organic materials The contamination with organic materials must be kept as small as possible, be-
cause separate slime can be caused by this
Table 40: Special requirements for open and half-open cooling systems for water coolers:
Damages at the unit which are caused by clogged, corroded heat sinks or other
obvious operating errors, leads to the loss of the warranty claims.
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