Pan Humidifiers
A pan humidifier consists of a water tank (pan), heating coils, a fan, and a fan motor (see Figure 11-5). The heating coils are installed in
the water tank. Heat is supplied to the pan heating coils either by low-pressure steam or forced hot water where a water temperature of 200°F or higher is maintained.
The pan humidifier is completely automatic; the water level in the tank is controlled by means of a float control. When the relative humidity drops below the setting on the humidistat, the fan blows air over the surface of the heated water in the tank. The air picks up moisture as it travels over the surface of the water and is blown into the space to be humidified. When the humidistat is satisfied, the fan is shut off.
Related posts:
Steam and Hot-Water Space Heating Boilers:Pressure Controllers
Sizing Residential Heating and Air Conditioning Systems:Outside Design Temperature
Central Plants:Chillers
Single Zone Air Handlers and Unitary Equipment:Rooftop Units
Gas Engines:Stirling Cycle
Air-Conditioning:The Comfort Chart and Cooling Load Estimate Form
Three-Dimensional Flows in Axial Turbomachines:Free-vortex turbine stage
Properties and Property Relations:Real Gases
Example: Heating Problems