Marzogh Company has an official consortium with the khaneh Mohandesi Mechanic Co, which holds official representation for Italian, Australian, and Omani companies in the design, supply, production, and direct implementation of cooling systems.
Innovations in Cooling Systems: A Closer Look at GeoClima, its Affiliate ClimaTech, and Eurapo
Cooling systems play a vital role in modern life, ensuring comfort in residential and commercial spaces while preserving food and sensitive equipment. As the demand for energy-efficient solutions grows, innovative technologies in this field become increasingly essential. GeoClima and Eurapo are leading brands in the cooling industry, setting the standard for quality and efficiency.
Since 1994, GeoClima has specialized in designing and developing chillers for air conditioning and refrigeration, with a strong emphasis on quality and environmental sustainability. This commitment has earned the company prestigious international awards and strict quality certifications. Located in Northeast Italy, their factory spans over 5,000 square meters and produces around 500 chillers annually for a global clientele.
In this section, we will review some of their projects and products.
TMA FC
Air cooled chiller with Turbocor centrifugal compressors, axial fans and Free Cooling system for outdoor installation
• Centrifugal compressors
• Dry expansion evaporator (HFO-1234ze)
• AC or EC axial fans both 800 and 910 mm (31 and 36 in)
• Free Cooling
GHA
Air cooled chiller with screw compressors and axial fans for outdoor installation
• Screw compressors
• Dry expansion evaporator
• AC or EC axial fans both 800 mm (31 in)
GHA ES
Air cooled chiller with screw compressors, axial fans and Evaporative System for outdoor installation
• Screw compressors
• Dry expansion evaporator
• AC or EC axial fans 800 mm (31 in)
• Adiabatic system
GHA FC
Air cooled chiller with screw compressors, axial fans and Free Cooling for outdoor installation
• Screw compressors
• Dry expansion evaporator
• AC or EC axial fans both 800 mm (31 in)
• Free Cooling
GHH
Water cooled chiller with screw compressors for indoor installation
• Screw compressors
• Dry expansion evaporator
GSA
Air cooled condensing unit with screw compressors and axial fans for outdoor installation
• Screw compressors
• AC or EC axial fans both 800 mm (31 in)
GSE
Condenserless water chiller with screw compressors to be connected with a remote condenser (RCE) for indoor installation
• Screw compressors
• Dry expansion evaporator
Panels, Paint, Insulation
TW-series casing panels are constructed from double
wall, sandwich type panels. With this configuration,
the insulation is kept out of the air stream and
thus assures better indoor quality, as well as the ease
of cleaning. Panel thickness is 30 ، 50 or 100 mm
based on the unit size, as standard TW 2 – TW 35
comes with 30 mm panel thick, while TW 47 – TW
120 comes with 50 mm panel thick. Upon client
request. TW2 – TW35 units can be manufactured
with 50 mm panel thickness.
For standard panel, the outer skin of the sandwich
panel is zinc galvanized steel sheet metal of 0,75 mm
thickness polyester powder coated (RAL 5012). It complies 360h salt spray testing and UV-light resistant.
The inner skin of the panel are supplied in a zinc galvanized finish of 1,2 mm thickness (class GI90).
Stiffeners inside the panel are provided to enhance
the rigidity and to secure the inside insulation. The
internal insulation for best thermal and acoustical
unit performance from rockwool and having min. 70
kg/m3 density. The insulation confirms to Class A1,European EN 13501-1 standards for fire resistance and is having conductivity lD 0,035 W/m-KJ.
Access Panels And Doors
The access panels and doors of the air handling unit
have exactly the same configuration of the fixed
panels described previously with same variety of
choices.
The access panel type is determined based on the
unit size and the section which to be served.
Five types of access panels and doors can be provided:
A. Screwed panel is fixed with external screws for
easy service access.
B. Removable access panel with latches and handle.
C. Hinged door with turn bolt.
D. Hinged door with turn-lever.
E. Hinged door with double lever lock.
Roof Cover
For outdoor installations, TW-series air handling
units are equipped with a standard roof cover to protect
the unit from varying climates. The roof cover is
made with slight pitch down from the centerline to the ends on both sides to avoid rain accumulation on the unit top. For best rainwater drainage, the roof cover is extended along the unit perimeter.
Filters
A wide Variety of filter types is available to meet any filtration requirements, including flat filters, low-velocity filters, bag filters, HEPA filters, carbon filters, and other types.
options:
– Carbon filters
– Stainless steel filter frames.
– Differential pressure switch (loose delivery)
– Auto roll filters
– Sand Inertia filters
– For visual indication of the filter conditions, an inclined
manometer for indoor applications can be provided
or alternatively, a Magnahelic manometer can be
provided specially for the outdoor applications.
(loose delivery)
Coils
All coils designed to deliver their respective duties at optimum performance at all design conditions and to meet a wide range of applications and requirements. As a standard, coils are manufactured from seamless copper tubes of 1/2” OD, mechanically expanded into collar continuous corrugated aluminum fins to provide a continuous compression bond over the
entire finned length for maximum heat transfer rates. The standard fin spacing is 2,0 mm; however 3,0; 2,5 and 1,8 mm are available as an option upon the client request or to achieve the determined indoor
conditions. Extensive cleaning is done after manufacturing each coil for optimum system cleanliness and all coils are factory tested at 300 psig air pressure underwater. Due to the huge variety of coil input conditions, the
coils calculation and selection is optimally done
based on a fully wetted coil by selection software
integrated in the unit selection software to match the required conditions. Direct expansion coils are equipped with a properly – sized expansion valve and distributor to ensure equal refrigerant fed to all circuits. The number of circuits is chosen to provide optimum heat transfer and reasonable refrigerant velocity and pressure drop so as not to trap any oil in the coil tubing. Headers and connections for water coils and DX-coils
are made of seamless copper pipes, and inlet and outlet
connections are sealed against unit panels by rubber gaskets as standard wherever coil connections protrude through the casing.
Utilizing the full available unit cross section area, coils
are mounted in the unit casing on noncorrosive slide
rails to allow for easy coil slide in – slide out when required. All water coils are fitted with plugged drain and vent tapping to facilitate draining and venting.
Options
– 304/316L Stainless steel coils casing
– On staked coils, intermediate drain pans can be
fitted to provide drainage of condensate on the
upper coil block.
– Copper tube – copper fins coil
– Pre-coated fins coil epoxy
– 5/8’’ tube diameter – coils
– Coated coils Heresite; Bly-Gold
Drain Pan
In order to remove the condensate, droped-out during
dehumidification, the drain pan is supplied under the cooling coil, cover the entire coil section. The drain pan, as standard, is made from stainless steel, material code 304L. For best drainage, drainage connection given from one side of AHU (left or right). For AHU’s of size TW 47 – TW120 the drainage connection, due to the big size of coils could be provided from both sides. The drain pan outer surface is insulated by (1/8″-thick) closed cell foam insulation to prevent condensation.
Options:
– Intermediate drain pan for small Units
– 316L Stainless steel pain
Fans
1- Centrifugal Fans
The standard used fans in TW-series are high performance
Double Width Double Inlet (DWDI) centrifugal
fans, optimally engineered for HVAC application, with
high quality, and fully tested performance in accordance with DIN 24166 accuracy class 1, ISO 5801,
BS 848-Part1 and AMCA 210 standards. All fans are optimally selected for best performance and sound characteristics based on maximum fan efficiency.
The impellers can have forward curved, backward
inclined or airfoil profile blades depending on the
customer requirement and the system static pressure.
The impeller is galvanized finished for forward curve
blade, glass reinforced polymid or welded heavy
gauge steel painted with epoxy for backward and airfoil
blade. All fans are statically and dynamically
balanced for stable non surging operation.
2- Plug Fans
Most of the energy consumed by an air handling unit
is the electricity used to run the fan motor, whilst only
a small percentage of the energy goes to heat generation, so high fan efficiency means power saving,
this is why the plug fans which are high fan efficiency
significantly reduces the consumption of electricity, and therefore the operation cost. Direct Drive simplicity converts to less operating expenses also as there are no fan shafts, bearing, belts or guards to maintain.
Noise emission level of air handling units is also one
of the most important environmental factors which
we fine tuned our product to reduce it, the choice of
using plug fan will be ideal to achieve this goal. Plug fans are extremely quiet Efficiency and
quiet operation make an exceptional combination for your air handlingunit.
Blower Motors
Fan motors are totally enclosed, fan cooled (TEFC) squirrel cage type with class “F“ insulation at 40 °C ambient temperature and continuous duty. Motors are of IP55 and protect the motor from dust and water, it is mounted on an adjustable slide so that the
belt tension can be easily adjusted. With a voltage tolerance 10% and frequency tolerance 5 %, motor can operate in an ambient -16 to
+40 °C according to IEC60034-1 standard. For motor sizing the mechanical losses incurred in
transmitting the load from motor shaft to the fan shaft are taken into consideration along with a reasonable safety factor.
Options:
– Explosion Proof motors
– Two speed motors
– Stand by motors
– VFD for motor
Standard motors are fitted with six terminals, and a
terminal connection and wiring diagrams are shown
in the motor terminal box.
Drives
Transmission of power from the motor to the fan is
provided by means of a set of pulleys and matching
V-belts. The pulleys are taper locked to the fan and
motor shaft. TW-series air handling units are equipped
with the optimized pulleys and belts, which are
sized and pre-installed by factory. Optimal selection
of drives and proper installation will ensure that the
fan restart at the required designed speed and at
same time help to optimize fan and motor bearing life.
Vibration Eliminator
In order to reduce the transmission of noise and
vibration, the complete fan motor sub-base assembly
is mounted on set of anti-vibration mounts.
As standard for TW2- TW35, the fan assembly is a
common base frame entirely isolated from the unit by
rubber in shear while as standard in units TW47 –
TW120, the frame isolated by 1” deflection open type
spring isolators.
Options:
– TW2- TW35 quipped with the 1” deflection springs.
Reference
multi COMPACT
Hygiene Compact Unit, Type KWHC
Application
The compact unit is ready for installation and designed for operation theatres, hygienic areas, intensive cares
and other applications, where hygiene climate is required according to DIN 1946/4 standard
Design
Frame design made of galvanized hollow sheet-steel
profiles and corner connections made of plastic. Inside
of unit made of galvanized steel, sealed and insulated
with mineral wool. Outside of the panels coated in RAL shade 5012.
Electrical and control section consisting of
– Digital control system for temperature and humidity,
controller for humidifier, speed controller for supply and exhaust fans, as well as filter diff. pressure switches.
Options:
Versions without return/exhaust air sections or without heat recovery system but including external aircooled condenser as well as external humidifier in the duct system on request!
Outside and supply air section consisting of
– Filter section with filter cassette G4
– Heat recovery section with Cu/Al heat exchanger
– Cooling section with Cu/Al heat exchanger as direct
evaporator with eliminator
– Heating section with Cu/Al heat exchanger, frost protection
thermostat and control valve
– Fan section with single inlet radial fan with backwardcurved
blades, without casing, incl. speed controlled
motor and air volume measurement
– Humidifier section with electrical steam
humidifier
– Filter section with filter cassette F8
Return and exhaust air section consisting
of
– Filter section with filter cassette G4
– Heat recovery section with Cu/Al heat
exchanger
– Condenser section with Cu/Al heat
exchanger
– Fan section with single inlet radial fan
with backward curved blades, without
casing, incl. speed controlled motor and
air volume measurement
Mechanical section consisting of
– Compressor in Scroll-design for refrigerant
R407C or R134a, including all
necessary refrigeration accessories and
safety devices
– Controls for heat recovery system with
pump, expansion tank, pressure gauge
and safety valve
Hospital Equipment
Hygiene HVAC Solution (ÖNORM H6020 and DIN 1946-4)
Low-turbulence, homogene displacement air flow –
clean air LAM; series OPL…
The ventilation system OPL generates as stable
low-turbulence displacement air flow (“laminar
flow“) in the area of the operation slab. By this
system contamination with room-air is prevented. A
variant in design is Octaeder-/round form.
Optimizing air supply volume compared to the conventional ceiling
Laminar-flow displacement air flow with integrated
exhaust unity – clean air MAX; series OPLF…
A system for operating theatres with high special
demands of hygiene and germ poverty. A stable
“laminar“-air flow protect the OT-area for a downstream
laminare air flow around the OT-table, team
and patient. Fresh air will be mixed with OT-return
air and conditioned in a separated air handling unit.
The return air is sucked from the OT through grilles.
Low-turbulence displacement air flow with displacement
area – clean air JET; series OPS…
The ceiling with supporting air stream generates a
stable, low turbulence and draught-free displacement
air flow. The stabilizing action of the supporting
streams attains a wide active area, mostly with
downwards movement of supply air and safety
covers the operating slab, the operating team and
the instrument carrier.
Turbulent mixed-airing –
clean air HYG; series HA…
A air distribution-system, which operates according
to low-turbulence induction principle. Designed for
Hyg.-rooms with low-limited room-height or special
roofing, in which no other Hyg.-suspent ceiling airdistribution
system can be used. The hygienic-outlet
can be used for OT-assosiated-adjoining rooms,
as well.
HEPA-filter ceiling and wall diffuser –
clean air SUP; series SFD…
These systems are designed for particle free and
and low-germ air distribution into clean-/hyg.
areas. They are equipped with HEPA-filter class
H13 or H14. For air distribution perforated, anemostat
or twist diffuser can be provided.
Exhaust air fluff-separator –
clean air EXH; series OPFA…
By use of the OT linen and clothes fluffs are generated.
This is critical and of hygienic consideration
in OT-rooms and the connected air conditioning
systems. By use of of fluff-grilles, with removeable
stainless steel mesh, contamination of fluffs in
exhaust and supply air will be avoid.
Foodstuff & Industial Equipment
High quality air conditioning units for special industry application
The units are user specifically designed and produced.
Cooling and conditioning units
for food stuff industry
Cooling units for pastries and sweets
Conditioning units for pastries
Water tempering units for pastries and sweets
– casing made of stainless steel
– integrated refrigeration unit
– integrated control unit
High precision air conditioning units
for clean rooms
– casing double skinned outside coated, inside of
stainless steel
– fan section with speed controlled motor and air
volume control system
– integrated refrigeration section with heat recovery
sytem
– steam humidifier
– control section with micro procssor controller
– high temperature and humidity constancy
Cooling units in production lines
for candy industry
– frame made of stainless steel
– belt driven fan section with motor
– cooling section with drop separator and drain pan
– heating section
– integrated titanium plate heat exchanger
– armature group mounted
Grand Air Handling Units System GTW
Robust solutions for extreme requirements
A balanced range of units with 6 different sizes for air volumes of 80.000 – 250.000 m3/h, offers you a individual selection for each demand.
Air Handling Units of series GTW can be used,
where other modular standard units do not find an engagement because of ther big sizes. AHU´s of GTW series shall be dlivered in knocked-down conditions, whereby the assembling will taken place at site. The unit configuration will be as per request and regarding to thermal transmittance classes, as well as sound technical requirements and under consideration of transportation an installation.
The basic of series of GTW is of modular construction using heavy duty galvanized hollow steel profile
structure. The panels are double skinned made from galvanized sheet metal with a thickness of 63 mm.
filled with noninflammable mineral wool accordingclass
A1, as per EN 13501-1.
The units are useable for indoor as well as outdoor
installation. For outdoor installation the units will
have a weather protection roof (trapeze sheet
design).
