Dehumidifiers

Air is a mixture of moisture and air. Hence this moisture needed to be removed from the air by changing the temperature and humidity through a medium. The process in which the moisture is removed from the air is called Dehumidification process. This functionality could be achieved by using Appidi Dehumidifiers.

Dehumidifier shall be Honeycomb Desiccant type and the patented refined technology which goes into manufacturing of Desiccant Rotors is most reliable and energy efficient. As a result our rotors will regenerate to its optimum level with only 120 Deg C.

In several cases our Dehumidifiers are working with only low pressure steam of 3.2 Kg / Cm2 without adding any backup heaters. Our Dehumidifiers are so efficient that they maintain as low as 12% Relative Humidity with only 85 Deg C regeneration temperatures in favorable weather seasons.

The basic Dehumidifier model starts from 360 CFM. This basic model is used for achieving the desired conditions. Depending on the requirement the larger models would be recommended for achieving the desired conditions.

The basic model can consist of pre filter, Desiccant Rotor and Process fan in the supply section and heat retardant filter, heaters/ steam coil and Reactivation fan on the re generation section.

Engineered Dehumidifiers will be available in various combinations like Dehumidifier with complete AHU, Pre cooling coil and after cooling coil sections and required filtration, process fan of desired static pressure. By pass arrangement for the return air, desiccant rotor etc. Our Desiccant rotors are integrated with silica gel metal silicates by special manufacturing process which has a capability of high moisture removal.

The Dehumidifiers range starts from 360 CFM and extend up to 25,000 CFM in single unit. Many applications require specially selected Dehumidifiers to achieve the desired conditions.

Applications:

Pharmaceutical Manufacturing labs
Food processing units
Ship building
Hygroscopic product storage
Coffee & Tea Industry
Seed storage rooms
Sugar packing areas and warehouses
Aircraft Maintenance Centers
Cold store rooms
Defence labs
Heritage structures, art galleries and museums
Manufacturing facilities of computers and electronic components
Power stations, precision and chemical plants
Humidity control is essential prior to painting of internal surfaces in large construction, bridges, warehouses, tunnels, wind mill towers etc.
Fruit Drying
Chocolate Storage
Fertilizer bagging area
Rubber creel room
Leather storage
General laboratories (instruments)
Engine testing rooms and many other applications

Technical Data for Dehumidifier
Dehumidifier Model	CCR-150	CCR-250	CCR-350
Dehumidifier CFM	1000 CFM	1500 CFM	2000 CFM
100% Electrical Heaters Consumption KW	15	22.5	30
Optional 100% Steam Consumption Kgs/Hr	32.65	47.58	63.44
Process Motor Capacity	1 HP	2 HP	3 HP
Reactivation Motor Capacity	0.5 HP	1.5 HP	2 HP
Process Air Inlet flange Size mm	605 X 300	745 X 400	945 X 450
Optional Precooling coil size	As per fresh air CFM	As per fresh air CFM	As per fresh air CFM
Optional Steam coil size	12.5" X 12" X 4 Row	12.5" X 16" X 4 Row	15" X 16" X 4 Row
Dimensions Approx.	1680 L X 825 W X 1490 H mm	1980 L X 950 W X 1630 H	1915 L X 1050 W X 1500 H
Weight	300 Kgs	1915 L X 1050 W X 1500 H	600 Kgs

Note: All the above quantities are subject to change as per the customer's requirementments and conditions only.

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Engineered Dehumidifiers with AHUs

Keeping Customer’s ever changing requirements in mind, Appidi Technologies launched combined unit of Engineered Dehumidifier to control Temperature, Relative Humidity and Filtration.

The air handling units are integrating pieces of equipment consisting of fans, cooling coils, heating coils, air controls dampers, filters. The purpose of this equipment is to collect and mix air from the Desiccant Rotor with that returning air from the building space. The air mixture is then cooled / heated, after which it is discharged to the building space. The Centrifugal / SISW / Plug fans pulls air from the occupied / process areas of the building through return air ducts. Return air partially goes to the Dehumidifier along with fresh air and the balance air is directly by passed to the post cooling coil section of the ENG. Dehumidifier. Thus mixture of air from Dehumidifier rotor and the return air is called the process air.

Applications:

Pharmaceutical Manufacturing labs
Food processing units
Ship building
Hygroscopic product storage
Coffee & Tea Industry
Seed storage rooms
Sugar packing areas and warehouses
Aircraft Maintenance Centers
Cold store rooms
Defence labs
Heritage structures, art galleries and museums
Manufacturing facilities of computers and electronic components
Power stations, precision and chemical plants
Humidity control is essential prior to painting of internal surfaces in large construction, bridges, warehouses, tunnels, wind mill towers etc.
Fruit Drying
Chocolate Storage
Fertilizer bagging area
Rubber creel room
Leather storage
General laboratories (instruments)
Engine testing rooms and many other applications

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Energy Recovery Systems

Air to air principle of energy transfer:

Appidi Energy Recovery Units (ERU) heat recovery is a plate or rotary type air-to-air heat exchange designed to provide maximum energy efficiency in ventilated systems where heated or cooled air is let out and outdoor air is let in. In applications where ventilation is required or recycling of the same air is not allowed, energy recovery wheels or plate heat exchangers are used to recover the energy from exhaust air. This reduces the initial investment in HVAC equipment and minimises operating costs.

Since HVAC equipment is typically the largest source of energy consumption in commercial buildings, ERU investments are economically justified for outdoor air makeup. In new HVAC installations ERUs also allow ventilated systems to be sized with smaller compressors, lowering initial costs of the HVAC package.

Principle advantages:

Reduce CO₂ emissions
Sensible use of fossil energy carriers
Protects nature for future generation
Improves indoor air quality
Improves employee functional efficiency

Rotary heat exchanger:

For ventilation systems:
The highest form of thermal energy recovery system in air handling systems is the rotary heat exchanger. There is no other system of energy recovery that can deliver high efficiencies with high air volumes in limited room spaces.

Principle:
The rotor which is constructed like a honey comb rotates non-stop between the streams of cold air and hot air. The rotor is cooled up to 80% of the cooling and humidity contained in the air. Then the cooling is transferred to the hot supply air coming from ambient to the rooms.

Rotor types:

Condensation rotors
Primarily used for sensible energy recovery

Enthalpy rotors:

This kind of rotor has hygroscopic surface, which is supports the transfer of moisture.

Sorption rotors:

Rotors of this type have a high hygroscopic coating which allows high sensible and latent efficiencies year round.
Epoxy coated rotors In order to increase corrosion resistance; rotary heat exchangers are also coiled out of epoxy-coated aluminium foil.

Rotary Heat Exchangers:

Paint booth rotor

It is quite impossible to imagine today's large sized paint booths in the automotive industry without heat recovery systems. The economic benefits are indisputable.

Paint application systems are in constant use, maintenance intervals are growing and this requires heat recovery systems with high standards of operational safety.

Applications:

Pharmaceutical labs
Hospitality industry
Schools
Software parks
All comfort air conditioning zones require good indoor air quality

Counter flow plate heat exchangers

Give energy savings of up to 90% and higher in cases of condensation
Machine finished real counter flow heat exchangers with channelled airflow guides made from sea water resistance aluminium to achieve higher efficiencies over the entire volumetric spectrum.

Applications:

Air-conditioning units, controlled accommodation ventilation, warmth recovery in winter and cooling recovery in summer.

Functional principle:

The two air streams are conducted past each other along thin parallel aluminium plates according to the counter flow principle. Up to 90% of the heat in the exhaust air is transferred to the ingoing air, without any smells or humidity being exchanged.

Advantages:

Distribution of airflow though definite channelled guides, thus ensuring high performances by simultaneous low pressure losses over the entire volumetric spectrum.
Eight sizes available to cover volumes from 50-2000 m3/h for one unit
Application of seawater resistant aluminium
Precise machine manufacturing
Precision engineering with totally smooth outer surfaces to ensure optimum sealing and perfect matching to the A/C systems
No use of screws, bolts or drivers
Long life span
Resistant to frost damage
Sealing between plates is done through adhesive diffusion of the sealing substance, thus making the system extremely hygienic. No bacterial growth is possible

Cross flow Plate Heat Exchangers

The plate heat exchanger consists of a plate stack composed of advantageously circular grooved plates, welded together. The clearances between the plates form flow ducts for flows of a heat-supplying medium and a heat-receiving medium. The plates are provided with holes which form inlet and outlet channels for the flows of the heat transfer media. At least one of the holes on the plates is located substantially in the centre of the plate.

The plate heat exchanger operates on the cross flow principle. When the plate heat exchanger is provided with a partly opened mantle which connects the end plates together, and the central channel is provided with a partly opened pipe to control the flows, the plate heat exchanger is made to function both on the counter flow principle and the forward flow principle.

The outside air and the inside air are completely separate from each other.