Aviation Shed Dehumidification

7/31/2019 Aviation Shed Dehumidification

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Founded in 1955 by the Swedish inventor Carl Munters. Product areas:

Dehumidification

Evaporative cooling & Humidification

Mist elimination & Water treatment Subsidiaries in more than 30 countries, with approx. 2200

employees.

Representatives and agents in many more countries.


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Munters headquartersMunters companies and officesAgents

Region EuropeRegion AmericasRegion Asia/Australia

(includes Africa,Middle East and Pakistan)


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Certificated ISO9001 since1994

Act in accordance with Agenda 21

Environment in according with ISO14001

and registering in according with EMAS


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Condensation


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Intentionalventilation

Evaporation fromhygroscopicalmaterials

Emission fromcombustion engines

Emission frompeople

Unintentionalventilation

DiffusionEvaporation fromwater surfaces

Fan

H20

Door

Moisture load


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-7-

Corrosion on steel

A process in which a solid, esp ametal, is eaten away and changed bya chemical action, as in the oxidationof iron in the presence of water by anelectrolytic process. A chemicalreaction formula is below :

Fe + 2H2O Fe(OH)2 + 2H+

0 20 40 60 80 100

120

100

80

60

40

20

0

% RH

High humidity

induces corrosion

Corrosion is the gradual destruction of material, usually metal, by chemical reaction

with its environment. In the most common use of the word, this means

electrochemical oxidation of metals in reaction with an oxidant such as oxygen.

Rusting, the formation of iron oxides, is a well-known example of electrochemical

corrosion. This type of damage typically produces oxide(s) or salt(s) of the original

metal. Corrosion can also occur in materials other than metals, such as ceramics or

polymers, although in this context, the term degradation is more common.


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0 20 40 60 80 100

120

100

80

60

40

20

0

1 m Au

% Relative Humidity

No. of corrosion

attacks per cm2

Corrosion on gold plated electronics


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0 50 70 100

50

25

0

3

2

1

0.1

% Relative Humidity

Temperature

C

Growth rate

mm day

Mould Growth

High humidity speeds up mould growth


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Condensation Problems

Due to hot and humid summerenvironment, dew condensation

occurs at floor and wall.

Rapid corrosion due to highhumidity.

Mould and bacteria growth

Reduction of building life


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Corrosion Example

Nato states that all of ammunition storage always have to bemaintained between 50%~60% relative humidity.

The pictures as above show that according to experiment fromGerman air force, one of engines that dehumidifier is not

installed is more corroded than other engines that dehumidifieris installed.


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Corrosion

Missile Corrosion ExamplePatriot Missile


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Principle

1. Process

Air

4.Wet Air

2. Dry Air

3. React Air

1. Process Air- Inside air of shed that should be

dehumidified.

2. Dry Air- Dried air by passing through

desiccant rotor (supply to the shedagain)

3. Reactivation Air- Heated reactivation air collects

moistureabsorbed by desiccant wheel.

4. Wet Air- Leave dehumidifier as wet air


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Outdoor type Dehumidifier

Accident prevention by heat and spark because of installed outside

Optional type (fixed type , mobile type)

Outdoor type IP54 grade

Simple installation and duct work


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Temperature & Humidity data

Army #3 ammunition depot temperature and humidity data(2007))

Humidity

Inside

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100


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Solved condensation


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Muntersdehumidifier

Dry air protection of the engine, avionics and electronicsPrevention of internal corrosion and condensation

Saab Gripen is the first aircraft in the worlddesigned with dry air protection in mind.All vital areas in the aircraft are reachedusing an engineered distribution system

Protection of Fighter Aircraft


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The Swedish Air Force has decided to modify the airframe oftheir C-130 Hercules with a dedicated dry air connector toreduce internal corrosion and improve MTBF of the avionics.

Payback: one year.

Protection of Cabin Aircraft


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Austrailian Blackhawk

Test on German Navy Sea King

Swedish HKP-4 (Rolls-RoyceGnome powered CH-46)

Royal Navy SeaLynx

Protection of Helicopters


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Protection of others


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Some parts that corrosion can happen from high humidity environment

such as Steel Box, Pylon Saddle, Pylon Top, Cable attachment, Land

connection can be protected using dehumidifier. This is for protecting

durability of steel components not only can extend the life but also

increase the stability of the structure.

Purpose of dehumidification


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Protection of Cables

Dehumidifier + Turbo Fan

Protection of reinforcement girder

Dehumidifier + Circulation Fan

Photo


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Protection of Anchorage

Anchorage Duct Line

Photo


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Protection of cables Protection of top area

Photo


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Air Flow : 50 ~ 120 CMHDehumidification Capacity : 0.2 ~ 0.9 kg/h

Applications: Condensation prevention for basement & garage Library and Museum

Condensation prevention for pump room & container

Small Unit (M Series)


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Air Flow : 180 ~ 3000 CMHDehumidification Capacity : 1.3 ~ 19.3 kg/h

Applications: Storage & Ammunition Storage Protection of Boiler (Power Plant) Pharmaceutical (Molding, Powder

process)

Condensation prevention for waste

water treatment plant

Condenser option : Able to use certain spacewhere can not be ducting

Medium Unit (ML Series)


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Air Flow : 2700 ~ 9000 CMHDehumidification Capacity : 22 ~ 57 kg/h

Applications: Large Storage Painting & Blasting process Drying process Manufacturing process

Store of Raw materials (10% RH)

Large Unit (MX Series)


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Ammo. Storage


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Partial DH (Active)-6 / United States

M-1A2 Abrams (courtesy Logis-Tech)

Protection of Tank


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Partial Dehumidification ActiveUnited States

M-1A2 Abrams (courtesy Logis-Tech)

Protection of Tank


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Protection of Ambulance

Folded medical field hospital shelter on 4-ton DAF truckShelter manufacturer: Fokker Special ProductsCustomer: Royal Netherlands Army


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Protection of EMP/RFI protected Shelters and Systems

Protection of the Patriot Phased Array Radar.

M-120 in trolleywith basket forflexible ducts andconnectors

Protection of Ambulance


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Protection of hangar


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Expected Effectiveness

Perfect protection of condensation at shed and storage

Corrosion prevention (maintained proper relative humidity according to NATO

& US regulation)

Cut down MTBF (Mean time between failure)

Reduce failure rate of electronic equipments

Reduce budget and labor

Date post:	05-Apr-2018
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Aviation Shed Dehumidification

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