HITEMA makes sure its customers' business is constantly up and running, thereby helping to increase their competitive advantage.
Base frame, structure, panneling
The base frame is made of heavy gauge electrowelded tubular steel sections throughout, treated with a hardwearing exterior quality protective finish.
Package water chiller ECF.630/CS STT.DPA.LN
Package water chiller ECS.545/CS STT
The sheet steel structure, which features the same passivation treatment and painting schedule as the base frame, is joined to the base by means of an electrowelding process.
The panelling is made of steel and finished with the same protective treatment.
Modularity
Facility to connect several units in parallel, also using modular chillers made by different manufacturers.
Package
free-cooling chillers consume less
power
-
good for the
environmental benefits
Offering
exceptional performance levels in terms of efficiency,
the units in the new series are able to exploit low
ambient airtemperature conditions whenever available –
all year round. The new range, which extends the
existing line of air conditioning units, has been
specifically engineered to provide the exceptional
reliability demanded in civil, technology and industrial
application.
The 3D module is complete and the 2D drawings are produced automatically for production.
Although the maximum saving in energy is obtained during continuous operation of the systems for 24
hours/day, chillers equipped with
free-cooling allow very substantial power consumption savings even with short periods of
operation, while also guaranteeing longer life expectancy and reduced maintenance requirements when compared to conventional
chillers.
The operating methods utilized guarantee energy savings typically in excess of 40% with respect to conventional
units.
Free cooling "No Glycol"
New system called "no glycol" is suitable for all applications where using of ethylene glycol or anti-freeze solutions is not allowed.
Careful design of the hydraulic circuit combines with the over-sized of heat exchanger and optimization of operation logic closely coordinated by a dedicated software, allow you to raise the maximum energy savings and lifetime of the machine.
Compressors
Types of primary makes of chiller compressors normally utilized in
mono, tandem or trio configuration, featuring high efficiency to ensure very competitive COP
values.
Screw compressor
Semi-hermetic screw compressor equipped as standard with four capacity steps. The electric motors feature part-winding start technology
or star delta open transition or star delta closed
transition and are protected from overheating by means of thermistors embedded in the stator
winding. The screw compressors are automatically
partialised in step o in a continuous way,
following the thermal load variation.
Hermetic reciprocating compressor cooled by liquid refrigerant on the suction side and protected by thermal overload and overcurrent relays.
Hermetic scroll compressor operating with very high efficiency levels and low electrical power consumption.
Scroll compressors in TRIO configuration
Scroll compressors in TANDEM configuration
Optional acoustic boxes available for compressor's and or pumps, low noise version
Microprocessor control
system
A microprocessor controls all unit functions and allows
any adjustment to be made. By means of the
microprocessor the self-point values and functioning
parameters can be entered directly. Supply water
temperature tolerance +/-
0,2°C.
This type of
microprocessor can control up to four compressors. It is
equipped with an acoustic and visual alarm, push buttons
for the various functions, continuous control of the
system and a data saving system in the case of a power
cut. The set-point values can be set and shown on the
display.
Main electric board thermo-regulated
Networking
Hitema avails itself of electronical control system to
monitor performance of its chillers.
All
the models are provided with Carel last version control pCO3 and
Modbus® protocol.
Adding a card as option to Carel control, it’s allowed
interfacing with Modbus®, BACnet™
e LonWorks®.
- Option card RS485 for Modbus® protocol;
- Option card LON for LonWorks® protocol;
- Option card pCONET for BACnet™ MS/TP
protocol;
- Option card pCOWEB for BACnet™ Ethernet™
protocol.
Electric boardECF.840/CSST.DPA.RV
Waterproof
test
Chiller with air cooled condenser managed by Electronically Commutated fans (EC-fans)
Plate core type cooling condensers with mechanically expanded copper tubes in an aluminium finned core (pre-painted on request) with swirl profile to increase turbulence and hence heat exchange efficiency, complete with subcooling function.
The
condenser section can be equipped with
electronically Commutated fans (EC-fans) for
further energy saving.
Fan test
Inverter for compressors
The big need to decrease energetic consumptions has driven to use inverter to control fans, pumps and compressors velocity.
All chillers with screw compressors can have on request inverter control (VFD) to change rotation velocity of compressor and then also cooling power, keeping compressor efficiency at good values compared to other ways of control of partial load.
The use of inverter involves important advantages:
Starting of compressors with low absorption of current
Energy saving during machine operation
Control more efficient of outlet cooling water temperature
In the picture below is shown an energy comparison between compressor control with slide valve and with inverter. It is important to note how decreasing load and velocity of revolution the inverter control allows a lower absorption that is near between 15% and 20%.
Package water chillers available with scroll compressors
The compact size of the units makes for more efficient use of available space, with reduced footprints minimizing the installation surface area
required.
Package water chiller models ECA.001 ÷ ECA.280/CS STT.SN
Package water chiller models ECRB 230-1250
Refrigerant circuit modularity
Total cooling capacity is generated by several compressors rather than relying on a single large size unit. This solution makes it possible to divide the total capacity into a series of steps and use reliable and economical standard components, thereby achieving clear manufacturing and functional benefits.
Vary cooling capacity, double recirculating internal pump and double processing pump managed with inverter.
Laser application
Perfect temperature control is achieved through the use of compressors with continuous capacity control combined with a system of hot gas injection to the evaporator. This solution, combined with our 316 AISI hydraulic unit, is ideal for cooling of "aggressive" industrial processes in which the temperature differential must be maintained at ≤1°C.
Dual refrigerant circuit evaporator
Self-cleaning coaxial type with high turbulence swirl profile
(ECA-ESE.001÷085)
Direct expansion type of innovative water/gas design, constructed of heavy gauge copper pipes, immersed in the storage tank, thermally insulated and crossed by reverse-flows of gas-water that make it possible to achieve maximum effective heat exchange, zero thermal dispersion, operation of the compressor with low compression ratio with a consequent high efficiency coefficient.
Shell and tube type (ECA.095÷1250)
Very rugged construction, designed to withstand vibration and corrosion. The "U" type geometry of the tube core guarantees very high absorption of mechanical stress. The tube core can be removed for inspection or maintenance purposes. The shell is insulated with extra-thick anti-condensation matting in closed cell material.
Brazed plate type (on request ECA-ESE.002÷180)
Made of 316 AISI stainless steel with extra-thick anti-condensation matting in closed cell material.
Package water chiller ESE.038/SS B-ES RV.PH with plate evaporator and recirculating and processing high pressure pump (15 bar)
Refrigerant circuit
The refrigerant circuits feature a mono compressor, bi-compressor, or trio compressor in tandem configuration with welds executed using silver alloy weld material. Refrigerant circuit components:
Expansion capillary tube (001 ÷ 004);
Mechanical or electronic lamination valve (005 ÷ 1250);
Shut-off valves (optional);
Filter/filters drier;
Liquid and moisture indicator;
Muffler;
Desuperheaters or recovery condensers to produce hot water (opt.);
Safety pressure switches on high pressure (005÷1250) and low pressure sides (022÷1250);
Pressure connections for charging and discharging refrigerant fluid;
Clearly visible dual scale pressure gauges (opt);
Refrigerating circuit with with
plate de-superheater
Condenser treatments
Condenser coil protective guard;
Electrical panel ventilation (opt.);
Pre-painted condenser coils (opt.);
Built-in free cooling coils (ECF);
Heating pump (ECH);
Check valve (opt.);
Cycle inversion valve (opt.);
Phase advancing condensers (opt.).
Package heating pumps
Complete hydraulic circuit
The flexibility of the hydraulic circuit configuration greatly facilitates the installation and commissioning of Hitema
units. The flow of fluid to the evaporator is generated by means of one or more pump units that are connected
alternately.
The hydraulic circuit includes:
Storage tank in carbon steel (Fe 360)
or stainless steel (316 AISI)
Relief valve from model ECA.022
Clearly visible water pressure gauge from model ECA.002
Evaporator protection flow switch
Automatic air separator
Automatic filling unit with clearly visible pressure gauge
(opt.)
Manual by-pass from model ECA.002
Automatic by-pass (opt.)
One-way valve (opt.)
Antifreeze heater (opt.)
Discharge valve
Shut-off valve (opt.)
Pumps
management with inverter
Supporting Customers
all over the WORLD
Hitema's guarantee of quality and reliability is underpinned by the use of the very latest technology supported by constant research and products that are manufactured in accordance with very stringent standards.
Customer Support can be reached easily worldwide. Hitema
is always able to provide correct and fast answers and
an immediate support. Our daily contact with our
Customers gives us a the real feedback which permit us
the constant improvement of our Hitema's
performance.
