glen wilson munters airt uk seminar presentation
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Munters Seminar Presentation
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Introuction to Munters
The effects of humidity
Sources of moisture
Methods of dehumidification
Applications overview and case studies
Agenda
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Introduction to Munters
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Munters began trading in 1946 in the UK and incorporated in 1955
World leader in dehumidification and other high end air treatment technologies
3,000+ employees serving customers in more than 30 countries
In-house design services
Full engineering capability
Installation capability to CDM
Full Service support
Headquarters in Stockholm, Sweden
Munters Key Facts
Munters Group has over 300,000 air treatment systems installed worldwide
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A Fast Introduction to Munters Air Treatment
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Over 300,000 successful applications for comfort, process & environmental
protection
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The Effects of Humidity
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Most materials are
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Unaffected bytemperature change
Affected by
moisture change
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Energy consumption
Microbiological growth
Test equipment accuracy
Electrical conductivity
Degradation of buildings and products
Product drying issues
Refrigeration plant efficiencyAesthetic presentation
Chemical reactions
Moisture regain
Effects on People
Condensation Corrosion
Reducedproductivity
Effects of Humidity
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0 10 20 60 70 80 90 10030 40 50
Steel
Non-ferrous metals
Gold plated contacts
Wire insulation
Rubber and elastomers
Mould, mildew, fungus
Effective / EconomicStorage RH%
Relative Humidity
Good protection Some protection Poor protection
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Annual Mean Relative Humidity
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In most places around the world the average relative humidity is over 70%
0
RelativeHumidity
20
40
60
80
100
SanFrancisco
Miami
RiodeJaneiro
Toronto
Dublin
Tokyo
Melbourne
Singapore
Rome
Munich
Amsterdam
Athens
Karachi
Lagos
London
Paris
Stockholm
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UK Average Climate
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Temperature =10CRelative humidity =80% RH
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Sources of Moisture
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Moisture Load Calculations
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Unintendedventilation
Intentional
ventilation
Evaporation of
water
Emission frompeople
Diffusionthrough materials
Evaporationfrom materials Emission from
combustion
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What is Relative Humidity?
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1 kg air
80% RH
6g
10 C30 C
23% RH
1 kg air
6g
% RH is a comparison between: how much moisture is in the air and how much
moisture the air is able to hold.
At 100% RH the air is saturated and water condenses out.
1 kg air
100% RH
6g
6.5 C
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Methods of Dehumidification
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Heating
Desiccant
Dehumidification
0 2010 30 40
6
% RH
-10
2
4
8
10
12
14
16
18
20
405060708090100
Cooling
Methods of controlling humidity
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Psychrometrics
Temperature C
% Relative Humidity
AbsoluteHumidity
Dewpoint
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Ventilation air has to have a lower moisture content to beeffective and is therefore at the mercy of changing
weather conditions
Ventilation
-10 0 2010 30 40
DRY - BULB TEMPERATURE C
2
4
6
8
10
12
14
16
18
20
405060708090
MOISTURECONTENTg/Kg
% RH100
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Absolute humidity unchanged
Lowers relative humidity
Dewpoint unchanged
Expensive in energy terms if comfort control is
not required
Heating
% RH
-10 0 2010 30 40
DRY - BULB TEMPERATURE C
2
4
6
8
10
12
14
16
18
20
405060708090
M
OISTURECONTEN
Tg/Kg
100
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Cooling
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Will lower RH after cold air is re-heated
Will reduce absolute humidity
Efficiency falls significantly below 10C
Wet coils = high maintenance and corrosion
HCFCs
-10 0 2010 30 40
DRY - BULB TEMPERATURE C
2
4
6
8
10
12
14
16
18
20
405060708090
M
OISTURECONTENTg/Kg
% RH100
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Reduces RH
Reduces absolute humidity
Reduces dew-point
Uses lower airflows
Desiccant Dehumidification
-10 0 2010 30 40
DRY - BULB TEMPERATURE C
2
4
6
8
10
12
14
16
18
20
405060708090
M
OISTURECONTEN
Tg/Kg
% RH100
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Desiccant Dehumidification
-10 0 2010 30 40
DRY - BULB TEMPERATURE C
2
4
6
8
10
12
14
16
18
20
405060708090
M
OISTURECONTEN
Tg/Kg
% RH100Continued
System runs dry = longer life
Multiple energy sources can be used
eg. gas, steam, MPHW Not temperature sensitive (+40C to -40C)
Can dry to -40C dewpoint
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Process (humid) air: passes through the drying wheel and leaves as dry air.
Heated Reactivation air: collects the moisture adsorbed by the drying wheel and
leaves as wet air.
Munters Desiccant Wheel Method
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Humidity Control for an Unheated Building
** *
**
**
Heating
Does not remove
Moisture !
Expensive
With heat, the air expands
and can hold more moisture,
Hot air rises!
Cooling Desiccant
DehumidificationPoor performance
below 10CPoor control,
Poor distribution
Removes moistureeven down to
- 40C
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Desiccant vs. Cooling?
Moisture
removal
capacity
Temperature 0C
It is quite common to combine both pre-cooling &
desiccant dehumidification to provide solutions
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Applications Overview
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Effective, accurate and cost-effective control of humidity and temperature forms a critical element ina number of different commercial and industrial applications.
As the inventors of desiccant wheel technology, Munters has unrivalled experience and expertise in
the development of energy efficient solutions for a wide range of challenging applications, including:
Food production, processing and cold storage
Pharmaceutical manufacturing
Data Centres
Storage of archives, paper, defence equipment, etc
Corrosion control in suspension bridgesLithium battery, electronics & semi-conductor manufacturing
Ice rinks and swimming pools
Paint finishing plus much, much more
Customer Applications
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Applications in Detail:Preservation
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Main Customer
Museums
Archives
Libraries and Galleries
Art and artefact storage facilities
Vehicles including classic car storage
Public and Private sector organisations
Defence forces
Shipping and Ferries
The Customer
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Effects of high humidity in Preservation
Inconsistent temperature leads to condensation (particularly in winter)
Shorten the life of photographs, paper, due to fungal and bacterial growth Increased cost of restoration for artwork
Significantly impact on value if damage has occured
Corrosion develops on metals
Bronze develops bronze disease
High humidity can make public areas uncomfortable
Reduce revenue if visitors number (fall due to climate)
High repair and maintenance costs to repair damage to
building fabric
Increased drying times (clothes drying)
Shorten life of cables (bridges)
High energy bills (using heating in storage areas)
Unforseen costs to replace items affected by moisture
damage
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Application areas
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Display
Cases
Controlled Humidity Environments
(CHE)
Public Spaces Ship lay up
Archive
sBridges
Clothes Drying
Film
Museums
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Consistent relative humidity levels year round
No seasonal fluctuations Comfortable climate conditionsHalt corrosion
Prevent mould and fungal growth
Ensure people comfort
Increase life of documents and national treasures Increase paper life from 50 to 200 years Increase life of film/photos from 25 to 1,000 years
Protect buildingsReduce building maintenance
Prevent unnecessary closures for repairs
Reduce labour costs
Reduce heating requirements in storage - SAVE ENERGY
Benefits of Dehumidification
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Solution:
Munters help to maintain consistent humidity controlled
environments in numerous display cabinets, museum spaces, art &
collection stores, including the Mona Lisa at the Louvre
Outcome: Important documents, artwork, artefacts, metals and more are
protected and preserved for generations to come.
There is no requirement to heat storage areas, reducing energy
requirements (in some cases)
Problem:
Museums need to protect valuable items from humidity related
damage. Materials such as paper and canvas will be damagedby mould growth if not properly protected. Metals are highly
susceptible to corrosion if relative humidity exceeds 70% RH.
Museums
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Company Application
Danish State Archives Storage of documents
National Film Archives Film Storage
Mary Rose Trust Display cabinet
Orford Museum Display cabinets
Constantine Art Storage Art Storage
British Library Protection of building
Scottish Film archive Storage protection of films
Royal Yacht Britannia Temporary for repairs
Stena Line Ferries Seasonal lay up (Winter)
Royal Botanic Gardens Seed storage
Royal College of Nursing Archive storage
Royal Mint Coin storage Crown Jewels Vault storage
Clothes Drying Clothes Drying
Carl Von Linne Archives Storage of books and other items
Severn Bridge Preservation of cables
Reference List
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Some of our Global Customers
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Munters Air Treatment
Questions?