Who are we

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ASHRAE 2008
- NB PEI Chapter - PRESENTATION on
HUMIDIFICATION Serge Landry, P ENG, MBA
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Agenda

• Why HUMIDIFY?
• Typical Applications for humidifiers
• Types of humidifiers
• Adiabatic
• Isothermal
• Electrode Type Humidifiers
• Resistance Type Humidifiers
• Gas-Fired Type Humidifiers
• Heat Exchanger Type Humidifiers
• Steam Distributors
• Short absorption manifold
• Humidifier Controls

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WHY HUMIDIFY ???

• Health and Comfort of people
• Provide a Controlled Environment for a process
• Maintain physical Quality/Integrity of Materials
• Eliminate Static Electricity shocks

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Typical Applications
Museum, Gallery, Library
-Protect valuable art works documents,
paintings, sculptures and antiques RH 30-60

• Health and Comfort
• Increase body resistance
• to airborne bacterias
• and viruses
• RH 35-60

-Prevent static electricity shocks RH gt35
Other Applications University, Laboratory,
Hotel, Convention Center, Restaurant,
Pharmaceutical,Textile and Wood Industries,
Retirement homes, etc
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Types of Humidifiers

• Adiabatic Humidifiers (?Q0)
• Drum/Pan Humidifiers (Wet media type)
• Ultrasonic Humidifiers
• Atomizing/Fog Type Humidifiers
• Isothermal Humidifiers (?T0)
• Atmospheric
• Resistance Type Humidifiers
• Electrode Type Humidifiers
• Gas-Fired Type Humidifiers
• Heat Exchanger Type Humidifiers
• Pressurized
• Steam Injection Humidifiers
• Steam to Steam Heat Exchangers

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Humidification Process
Adiabatic Humidification
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Types of Humidifiers

• Adiabatic Humidifiers (?Q0)
• Drum/Pad Humidifiers (Wetted media type)

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Types of Humidifiers

• Adiabatic Humidifiers (?Q0)
• Ultrasonic Humidifiers

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Types of Humidifiers

• Adiabatic Humidifiers (?Q0)
• Atomizing/Fog Type Humidifiers

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Types of Humidifiers

• Adiabatic Humidifiers (?Q0)
• Main Applications
• Source of Free Heat available
• Printing Process, Chemical Process
• Desertic Climate
• Arizona, Texas, Nevada

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Types of Humidifiers

• Adiabatic Humidifiers (?Q0)
• Features
• Highest Capital Cost
• Water Treatment, Compressed Air or High Pressure
  pumps.
• Highest Installation Cost
• Highest Maintenance Cost
• Lowest Operationnal (Energy) Cost
• (only if you have free heat)

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Types of Humidifiers

• Isothermal Humidifiers

• 1. Atmospheric
• Electrode Type
• Resistance Type
• Gas-Fired Type
• Heat Exchanger Type

• 2. Pressurized
• Steam Injection Distributors
• Steam to Steam Heat Exchanger

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Humidification Process
Isothermal Humidification
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Humidification Systems Isothermal/Atmospheric
Steam Generator Electrode Type humidifier
Steam Distributor Single Tube

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Main Applications
• Atmospheric
• When no live steam network available
• Pressurized
• When clean live steam is available.

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Electrode Type Humidifier

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Electrode Type
• Humidifier

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Electrode Type Humidifier
• Will not operate with treated water Softned, DI
  or RO
• Features
• Lowest Capital Cost
• - Low Installation Cost
• Lowest Maintenance Cost
• Operational Cost (depends on electricity cost)

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Resistance Type Humidifier

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Resistance Type Humidifier
• When using treated water (Softened, DI or RO)
• Features
• Medium Capital Cost
• - Low Installation Cost
• Medium Maintenance Cost
• Operational Cost (depends on electricity cost)

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• - Gas-Fired Humidifier

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Gas-Fired Type Humidifier
• For higher humidification loads or when
  electricity is expensive
• Features
• High Capital Cost
• - High Installation Cost
• High Maintenance Cost
• Operational Cost (depends on natural gas cost)

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Heat Exchanger Type Humidifier
• When boiler steam cant be injected directly in
  the Duct/AHU

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• Atmospheric
• Heat Exchanger Type Humidifier
• Used when your live steam is contaminated
• Features
• Low Capital Cost
• - Low Installation Cost
• Medium Maintenance Cost
• Low Operational Cost (depends on steam cost)

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Humidification Systems Isothermal/Pressurized
Steam Generator Clean Steam Boiler
Steam Distributor Short Absorption Manifold -
Pressurized

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Types of Humidifiers

• Isothermal Humidifiers (?T0)
• 2. Pressurized
• Steam Injection
• Humidifiers

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Steam Generators

• Isothermal Humidifiers (?T0)
• 2. Pressurized
• Steam to Steam Heat Exchanger

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Steam Distributors

• Nozzle Type Steam Distributors
• Single Tube Steam Distributors
• Room Distribution Unit
• Short Absorption Manifold

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Steam Distributors

• Nozzle Steam Distributor
• Applications
• Atmospheric only
• Residential applications
• Low capacities

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Steam Distributors

• Nozzle Steam Distributor
• Typical Installation

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Steam Distributors

• Single Tube Distributor
• Applications
• Atmospheric or Pressurized
• Duct
• Low to Medium capacities
• Absorption Distances
• 1 distributor AD 2 m
• 2 distributors AD 1,25 m

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Steam Distributors

• Single Tube Distributor
• Typical Installation

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Steam Distributors

• Room Distribution Unit (RDU)
• Applications
• Atmospheric only
• Room without ducts
• Large open areas
• High Ceiling

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Steam Distributors

• Room Distribution Unit (RDU)
• Typical Installation

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Steam Distributors

• Short Absorption Manifold

• Applications
• Atmospheric or
• Pressurized
• - Duct or AHU
• - Medium to high
• capacities
• - Short absorption
• distanceslt1 m

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Nozzle Type Tube Section
Steam
Moisturized air
Dry air
Airflow
Condensate
Steam
Nozzles
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Installation Atmospheric Application
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Humidification Controls
Humidistats
- Room Humidistat or Duct Humidistat - ON / Off
Signal For small capacities, residential and
comfort applications - Modulating Signal For
larger capacities and when accurate RH level
are required. Standard accuracy is 5 - BMS
BacNet, LonWork, ModBus, etc.. - Some
humidifiers are Internet ready.
Air Flow Switch
- Prevents humidifier operation without air
flowing in the Duct/AHU
High Limit Switch

• Prevents humidifier operation when RH
  level is higher than an adjustable set point,
  usually 85 RH.
• Must be modulating if VAV is used.

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• Questions???

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• Thank You
• for your invitation!