An air handler, or
air handling unit (often abbreviated to AHU), is a device used to
regulate and circulate air as part of a heating, ventilating, and
air-conditioning (HVAC) system. An air handler is usually a large
metal box containing a blower, heating or cooling elements, filter
racks or chambers, sound attenuators, and dampers. Air handlers
usually connect to a ductwork ventilation system that distributes the
conditioned air through the offshore unit and returns it to the AHU.
Sometimes AHUs discharge (supply) and admit (return) air directly to
and from the space served without ductwork. Small air handlers, for
local use, are called terminal units, and may only include an air
filter, coil, and blower; these simple terminal units are called
blower coils or fan coil units. A larger air handler that conditions
100% outside air, and no re-circulated air, is known as a makeup air
unit (MAU). An air handler designed for outdoor use, typically on
roofs, is known as a packaged unit (PU) or rooftop unit (RTU).
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Research Report of Offshore Air Handling Units Market :
Of note is the fact
that waste heat powered air handlers are growing in prominence. Some
of the factors that contribute to this are the growing focus on solar
power as a cost effective renewable energy source which is benefiting
demand for solar ventilation units, and the phase-out of fluorocarbon
based refrigerants by all governments worldwide to curb the damage
caused to the ozone layer. Some of the minor but notable factors are
the implementation of the Kyoto Protocol to tackle climate change,
rising energy prices, interest in energy conservation and the robust
demand from developing countries. Although there are a lot of growth
drivers cost is the primary constraint on the widespread adoption of
air handling systems. Moreover, the low thermal efficiency of
single-effect handlers has made them non-competitive with readily
available free waste heat. Furthermore, air handlers require greater
pump energy and larger cooling tower capacity than electric chillers
due to the larger volume of water. Opportunity in this industry is
widespread due to the availability of low cost units from some
manufacturers and the fact that heat from waste can be utilized in an
efficient manner.
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The offshore air
handling industry is diversified and can be divided on the basis of
energy supply as direct-fired or indirect-fired. They can also be
divided based on effect as: (a) Single Effect where the transfer of
fluids is through the four major components of the handling machine -
evaporator, absorber, generator and condenser; (b) Double Effect
which differs from the single-effect chiller in that there are two
condensers and two generators to allow for more refrigerant boil-off
from the absorbent solution; and (c) Triple Effect handlers that are
under development, as the next step in the evolution of the Heating,
Ventilation and Air-Conditioning (HVAC) technology.
The Asia-Pacific
region is currently the largest and the fastest growing market for
air handling units with leading demand coming from developing
countries such as India, China and countries in the Malay
Archipelago. Soaring temperatures in the U.S. and Mexico are
contributing to the demand in the North American region. European
countries such as Italy, Spain, U.K., France and Russia have been the
leading countries where demand is high. Change in government
regulations as well as availability of energy generated from waste
are being seen as the demand factors in the Rest of the World, mostly
Latin America.
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The front-runners in
the production of offshore air handling systems are: Broad Air
Conditioning Co., Ltd., Carrier Corporation, Century Corporation, EAW
Energieanlagenbau GmbH, Hitachi Appliances Inc., Johnson Controls, LG
Air Conditioning (Shandong) Co., Ltd., Robur Corporation, Thermax
Inc., Trane Inc., and Yazaki Energy Systems Inc.
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