LAR Process Analysers QuickTOC purity - Cooling and Emergency Cooling

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34 User Manual QuickTOC

purity

ATEX 2 04E3920

3 Product

3.6 Components of the Explosion Protection LAR | PROCESS ANALYSERS AG

3.6.2 Cooling and Emergency Cooling

The analyser is equipped with a heatpipe (3) in order to keep the inner temperature of the casing within

acceptable limits for the control logic - despite the high temperature of the furnace. Deflectors (4) within

the heatpipe transport the hot air out of the casing. The heatpipe is filled with a liquid and uses the phy-

sical effect of of evaporation and condensation. These two processes generate a high output of enegry.

The liquid evaporates on the hot side of the heatpipe, and condensates on the cool side. Thanks to ca-

pillary force, the condensation then returns to the hotter area in the heatpipe.

The correct functioning of the heatpipe is guaranteed by two ventilators (1, 5). The ventilator (1) is loca-

ted in the explosive area. This ventilator is set up for temperature class T3 or T4, and allows for conti-

nuous operation and has protection class IP55.

Fig. 19: Cooling Principle

Fig. 20: Heatpipe, outside view with mounted upper venilator (Example)