Heater humidifiers
Immerse heater humidification is becoming increasingly
required in work specifications where:
- Humidity must be controlled precisely (museums, laboratories, clean rooms);
- Water quality is not constant or is problematic (for example, aboard ships);
- Periodical maintenance needs to be minimised (using demineralised water).
Immerse heater humidifiers, unlike immerse electrode units,
can operate on demineralised water, as they do not exploit the electrical
conductivity of the water.
Periodical maintenance can therefore be greatly reduced, due
to the minimum formation of lime scale.
Weighing against this, the resistive elements must always be
completely immersed in the water, to avoid overheating, unlikely the situation
with electrodes, in which the water level is adjusted to modulate the
flow-rate of steam.
The operation of an immense heater humidifier then requires
water level sensors to ensure complete immersion of the electrodes, as well as
components (solid state relays) that adjust the amount of heat transferred to
the water so as to precisely modulate steam flow-rate.
These characteristics make the heater units more complex than
their counterparts with electrodes, yet independent of the characteristics of
the water and with much more precise modulation of the flow-rate. In addition,
as heater humidifiers are intrinsically subject to overheating, the quality of
design and the presence of safety systems are essential to ensure reliable
service over time.
The Carel solution in the market segment offers the maximum
in constructional quality and performance, meaning excellent reliability over
time and extreme precision of control for the more critical applications.
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