Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
EVAP TECH - CENTRAL AIR CONDITION PRE COOLING 5
INTRODUCTION:
The EVAP-TECH evaporative media have been designed to provide adiabatic cooling and
humidification for high performance applications such as evaporative coolers, air handling units and
data center cooling. These applications require the highest possible performance with minimal
maintenance and must comply with high hygiene standards.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1 The media are made of non-organic aluminum Hydro Chill fins with an anticorrosion coating. The
Hydro Chill fin technology is a combination between a special fin structure and thin water-retaining
coating, designed to keep pressure drop at minimum while delivering evaporation efficiencies that
exceed 90%.
Its modular design offers customers
the necessary flexibility to
accommodate for different airflow
capacities as required in their
product portfolios while
maintaining the individual
component performance
characteristics. On top of this, the
permanent antibacterial and
antimicrobial coating reduces
microbial activity with 99.99%
during its entire lifetime.
COOLING PRINCIPLE:
Direct evaporative cooling is a natural cooling
method that cools and humidifies the
airstream. During the cooling season hot intake
(outdoor) air flows through the soaked EVAP-
TECH TECH media and is cooled down by the
adiabatic evaporation process whereby the
energy to evaporate the water comes from the
air itself. The cool and saturated supply air
approached the wet-bulb temperature and can
be provided to the indoor environment or used
for other purposes.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1 FEATURES:
• Marine grade aluminum finned sheets with anticorrosion coating.
• Hydrophilic and hygroscopic water-retaining coating.
• Permanent antibacterial coating.
• Fully modular and self-supporting frame.
• Integrated non-organic water distribution and collection tray.
• Self-cleaning properties due to vertical fin structure.
EVAP TECH reduce air conditioner load by cooling the air that surrounds air conditioner
condensers.
HOW IT WORKS:
EVAP TECH boosts the effectiveness of air
conditioners by reducing the effective
temperature of the air surrounding the
outdoor section of the unit. Because the air
temperature is lowered, the condensing
section can release more heat to the outside
and the refrigerant cycle can work more
effectively. Evaporative cooling relies on
the principle that water molecules absorb
the heat of evaporation causing the
surrounding airstream to cool.
It also relies on the principle that the
cooler air has more capacity to absorb heat.
It works best in hot, dry climates.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1 EVAP TECH works on
the same principle as
traditional direct
evaporative coolers,
sometimes called
swamp coolers.
However, pre coolers
do not add humidity to
the air within the
conditioned space like
evaporative coolers do.
This is because the
evaporative effect is
utilized on the outside
section of the air
conditioner to boost its
effectiveness, not
within a system that
delivers air directly
into the space.
Systems that utilize
both technologies are also available. Two stage, or direct/indirect coolers use an air-to-water heat
exchanger / pre cooler which reduces the incoming air temperature without raising the relative
humidity, then puts the incoming air through a direct evaporation stage, further reducing its
temperature.
HOW IT SAVES ENERGY:
In hot, dry conditions, evaporative pre-coolers of this type can reduce the cooling cost by 24%. It is
easy to imagine that an air conditioner will not need to run as long when the condensing section is
transferring heat more effectively. This measure works extremely well during the hottest
temperatures and so has the potential to save peak demand.
EVAPORATIVE CONDENSER PRE-COOLING UNITS:
EVAP-COOL TECH evaporative pre-cooling systems increase the efficiency and capacity of chiller
groups and dry refrigerants, offering a COP 35% increase in effectiveness. They are economical and
environmentally friendly.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
The condenser air inlet of the air-cooled chillers is cooled by EVAPTECH units with a very low cost.
Easily-to-install on all types of condensers, the evaporative cooling pads are kept moist by simple water
circulation. The air is pulled through the pads and then through the condensers by the existing fans
of the condenser. The wet pads cool the air to wet bulb temperature, which becomes cooler before
entering the condenser.
Using the air cooled in this manner, the condenser works much more effectively enabling the increase
of the cooling performance
and the decrease in the
energy consumption of the
chiller. The break-down risks
decrease, the system and the
condenser lifetime increased
together with the global
working performance of the
system.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
Air cooling sample
table
WHY EVAP TECH?
The table below illustrates the savings for Air
cooled condensers using and not using the Pre Cool
Tech unit. The energy used by the Chiller is
decreased by 19 % and the cooling capacity is
increased by 11% as a result of an 11°C decrease in
inlet air.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
The condenser effectiveness increases on average by 2% with every 1.8°C decrease of air inlet
temperature achieved by the pre-cooling pads.
ADVANTAGES OF EVAP TECH:
• Dry-kept air-cooled condenser.
• No scale formation in air cooled condenser surface.
• Does not affect the condenser’s manufacturer warranty.
• Optimal water usage. • Continuous work of the system, on-off periods free.
• Temperature fluctuations free system
• High evaporation effectiveness (up to 96 %)
• Minimum energy functionality
• Low pressure water used for the system
• Minimum electric consumption is (0.5 kw pump)
• Small circulation pump is the only accessory, no electrical and
complicated devices
• Clean condenser prevents pressure loss
• Optimal efficiency increase methodology
• Problem free functioning and easy to install
• Manageable and economic automation system
• Very low maintenance cost
• Long Life for the air-cooled chiller and condenser
• The system can be installed on new equipment or as a retrofit resulting in savings or efficiency.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
HOW EVAP TECH WORKS:
The efficiency of any A/C system is dependent on the temperature difference between the air being
supplied to the system and the output temperature of the air which is used to cool the area being
cooled. This output temperature is dependent on the efficiency of the chiller system and decreases as
the outdoor ambient temperature rises. EVAP TECH system cools the intake air temperature of the
air cooling the condensing coil of the A/C system thereby reducing this difference and increasing the
efficiency of the system.
COST SAVINGS:
In the heat of summer this can reduce the peak electrical
consumption of the A/C system by more than 50%. This
system has been successfully used for many years for
energy conservation and was pioneered in Australia and
the USA. Because the efficiency and output of evaporative
cooling increase when the temperatures increases, the
system eliminates any operating peaks, removing the
requirement for additional expenditure on increasing
generating capacities to satisfy peak demand conditions.
PRE COOLING PERFORMANCE:
The Pre Cooling system improves the efficiency of A/C and Chiller performance by over 15%.
Boosting performance at the same inlet temperature.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
EVAP-TECH TECH EFFICIENCY
By reducing the intake air temperature with Pre-Cooling, improved operating efficiency is achieved
which provides lower operating costs, increased cooling capacity, extended equipment life, and
increased profits.
LOWER CAPITAL COST:
The Pre-Cooling system pre cools the air to allow the same level of cooling to be achieved with a
smaller capacity chiller. This means initial capital outlay is drastically reduced along with the on-
going operating costs.
EXTEND LIFE CYCLES:
An A/C system using Pre-Cooling operates in a far cooler and cleaner environment than normal,
reducing the load on the system giving the equipment a longer life span, higher productivity with less
maintenance needed.
EVAP-TECH TECH COMPONENTS:
The EVAP-KOOL TECH pad is a modular "plug and play" highly efficient direct evaporative cooling
pad including an aluminum frame with integrated water distribution for use in compact direct
evaporative cooling and humidification systems. Its modular design offers customers the necessary
flexibility to accommodate for different airflow capacities as required in their product portfolios while
maintaining the individual component performance characteristics.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
The evaporative media is based upon our unique and
patented water retaining finned aluminum sheet
designed for maximum evaporation. At an air
velocity of 2 m/s, we reach a saturation efficiency of
90% with an air pressure drop of only 44 Pa.
The EVAP TECH can be applied in air handling
units for both the air humidification and for
adiabatic cooling. It can also be applied as a droplet
eliminator in combination with a high-pressure
spray system for air humidification.
The EVAP TECH is also very suitable for
applications to pre-cool the air for a condenser coil in
a traditional air conditioner.
Another interesting application is to use the
EVAPTECH to adiabatically cool the air before a
condenser coil in a traditional air conditioning
system, giving the following important benefits:
• Energy savings of up to 30%
• Lower compressor peak loads.
• Increased chiller lifetime.
• Lower fan speed => lower noise level.
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
Office 2201, Building 1260, Road 2421, Block 324, Al Fateh, Manama, Kingdom of Bahrain BAH: +973 33559973 www.howdajbh.com CR No.: 128929-1
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