De-Humidifier
WHEN MOISTURE IS TORTURE
Simple & Cost effective Drying using Dehumidifiers
The problems related to product drying are typically:
Quality of Drying & Speed of Drying. Normally products are dried
with hot air. However most products which require drying are temperature
sensitive.
Moisture is present in the products as:
- Free moisture in form of surface moisture generated due to
washing or mixing the product with water prior to drying
- Hygroscopic moisture which is held within the product
- Combination of both
Drying operations involve the removal of all moisture to the
required level. Surface moisture (and it is often assumed that it is
only type of moisture present) is conventionally removed by raising the
product temperature by using hot air to vaporize the moisture. However
this can result in product spoilage as many products like cocoa,
gelatin, coffee etc are temperature sensitive and need to be dried at
low temperature.
Proper removal of the hygroscopic moisture depends on the difference
between the relative humidity of the air surrounding the product and of
the product’s equilibrium condition. If the RH of surrounding air
is lower, then the product will give up its hygroscopic moisture to the
drier air to be in equilibrium with its surrounding velocity of the air
over the product have little or no bearing on the drying speed?
Product Drying application are typically:
- Bulk (Batch)drying when material is loaded into
a compartment and entire load is dried as a batch.
- Continuous drying is when the wet material continuously is fed
into the drying room/chamber and it leaves the chamber, dried to the
desired result.
As every material has different physical characteristics, which
determine how it holds or gives up moisture, and published data on their
drying is generally not available, selecting appropriate air-drying
equipment must be done experimentally.
Usually the sudden change in drying rate (at the critical point)
donates where the initial drying via removal of free moisture ends, and
hygroscopic drying takes place over. In other words, the product has
lost its free moisture but is still hygroscopic ally saturated. However
the net effective drying surface and hygroscopic properties cannot be
determined in any other way.
Advantages of Using Dehumidification over other methods
Dehumidification is the most cost effective and easy method to ensure
drying without spoilage as the drying is based on the difference in
vapor pressures of water in the product and the surrounding air. By
physically removing the moisture from air, through the condensation the
evaporative potential of the air is maximized.
- Better quality drying with more uniform drying
- Faster drying rate without the risk of product spoilage
- Reduction in need for drying
- Low power consumption
Environment Drying
Some applications demand reduction of Humidity form the atmosphere of
the Room, Cabin, Hall & Buildings. Certain critical electronic
components, Server Rooms, Laptop, Digital Photocopiers and machinery
behave adversely due to high humidity. During summer the humidity
reduces upto 65% with the help of air conditioning but during the
monsoon and during the winters the solution can be achieved only by
Dehumidification. Typically server rooms if placed in basements are
prone to high humidity. Welding electrodes if stored must be stored in
humidity between 40-50% but if humidity increases it adversely affects
the product quality.
Packing for export shipment needs dehumidification especially in cases
for Leather, Surgical Blades, Ball Bearings, and Food items, Electronics
etc. Due to humidity present in the atmosphere the product packed has
the high content of moisture in the packed shipment. During the transit
period this affects the material and we find mould on leather and
rusting layers on metals.
Even in large offices during rainy season the humidity is required to
be reduced rather than reducing the temperature. But often we use air
conditioning to reduce the humidity whereby reducing the temperature to
a very uncomfortable range and also spending excessively on electricity.
Dehumidification improves air quality and efficiency in commercial area
and also dehumidification helps the asthmatic patents.
Corrosion Problems
Corrosion on any metal starts easily when humidity level increases
above 45%.The material stored to restricted humidity below 45% can be
retained in good condition. The speed of corrosion is faster, when
surface are exposed to pollution air in combination with high relative
humidity. A little water removal form the air saves a lot of money,
material and reputation. Dehumidifiers are an answer to controlling
moisture in packing, warehousing and storage area. There are basically
two types of corrosion :
Inorganic Corrosion: Rusting of metal surfaces.
- Aircrafts/Engines
- Ships/Tanks
- Automotive Parts/Precision Parts/Ball Bearings/Surgical Blades
- Electronic components storage/PCB’s/IC’s
Organic: Mould, mildew, funguses or any bacterial growth.
- Museums/Library/Archives
- Leather
- Cheese
- Audio/Video/Film/Micro Film
Humidity Control in Indoor Swimming Pools: Indoor swimming pools
require a Rh level of 40-60% for building safety, comfort and energy
consumption. Any much variation beyond 40-60% Rh would generate level of
bacteria, viruses, fungi and algae which leads to poor air quality. For
swimmers 50-60%RH is most comfortable. High Relative Humidity are
destructive to building components and mould & mildew can attack
floor, walls,& ceiling coverings. Generally indoor pool air is
maintained appx.1 to 2Deg Cel above the pool water temperature(but not
above threshold of 30Deg C) to reduce the evaporation rate and avoid
chill effect on swimmers.
Areas of where Dehumidification is necessary:
Manufacturing of Honey,
Spices,Noodles,Pasta,Walnut,Mushroom,Chillies,Starch,Dryfruits,Cardboard
Box, Soaps, Tobacco, Wood, Flowers, Ceramic Tiles, Carpet, Medicine,
Surgical Blades, Coffee/Tea Vending Machine Powder ,Pharmaceuticals and
many more. Packing section for all the above items including surgical
blades, electrodes, medicine, Pharmaceuticals units and many more.
Residences, Offices, Basements, server Rooms, Wood seasoning Units, Wood
Storage, Hospitals, Restaurants, Swimming pools, Ice Skating areas,
Cold Rooms, Cold Storage, Printing Units, Powder Coating Plants, Art
Gallery, Painting Booths , PAINTING OF WALLS / FLOORS
etc.
Laser Eye Surgery Rooms
Laser treatment is extremely popular today ,to prevent deterioration in
eye condition and occasionally to cure it.
Moisture Problem: Environmental variables like humidity &
temperature can affect eye surgery results. Research show that eye
surgeries performed in the hottest and most humid months(typically
(April, May June) require more corrective procedures later, when
compared to surgeries done during other months. Uncontrolled humidity in
the laser surgery rooms lead to various problems like:
- Laser strength reduction: Moisture in the air decreases the laser
energy absorbed by the stroma, the thickest layer of tissue in the
cornea.
- Also some patients cornea may become hydrated before the
procedure, making it more difficult for the laser to remove the
tissue.
- Higher the humidity ,lesser the affect of the laser.
A 10% increase in treatment room humidity meant an additional nine
out of 100 patients require an enhancement procedure. To avoid these
problems, the RH inside the eye surgery rooms should be maintained
around 40% Rh at 20Deg Cel.
Chocolates, Chewing Gums, Bubble gums, candies contain a large
percentage of sugar /sugar based ingredients which are hygroscopic in
nature. When humidity increased these products regain Moisture and
become sticky and prone to mould formation. This inhibits the natural
flow as it sticks to the high speed processing and packing machinery and
also to the wrapping material.
Uncontrolled humidity/moisture during the manufacturing & coating
process of confectionary causes
- Change in the structure/dimensions of the film core interface.
- Grainy and irregular coating.
- Increase in residual moisture content and improper adhesion ie:
degradation of coating quality presence of moisture.
- Sugar bloom and change in flavor.
Chocolates need to be stored at 35+5% RH at 25Deg Cel for safe
storage in order to retain its original flavor and aroma.
SO WHAT ARE YOU WAITING FOR HIRE A DE-HUMIDIER FROM AUTOMOTIVE
SOLUTIONS
 |
 |
Facebook
Blog
Google +
