HITEMA makes sure its customers' business is constantly up and running, thereby helping to increase their competitive advantage.
Package water chiller
ECS.545/CS STT
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.
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.
Package water chiller
ECF.630/CS STT.DPA.LN
Modularity
Facility to connect several units in parallel, also using modular chillers made by different manufacturers.
Scaled - down design
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 ECA.001 ÷
095/CHP
Complete of free-cooling ECF and ECFS series
Package water chiller complete of free-cooling ECF.840/CS
ST.DPA.RV
Offering exceptional performance levels in terms of efficiency, the units in the new series are able to exploit low ambient air temperature 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 industrial application. 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.
Freecooling control exploits the temperature of the outside air to assist in the cooling of the utility water. This function uses a heat exchanger, through which a special valve deviates a certain quantity of return water from the system. The favourable outside air temperature conditions thus cool the water prior to its return, and the activation of the cooling devices is therefore delayed.
Freecooling is envisaged for air/water units in internal
freecooling mode, that is, with the
freecooling coil housed inside the unit near the condenser coil/coils, with which it shares the control of the condenser fan/fans.
EAT
= air temperature sensor for freecooling
TFC = Freecooling water temperature sensor
VFC = 3-ways freecooling valves
Activation of the freecooling function
The freecooling function is based on the relationship that compares the temperature measured by the outside temperature probe, the temperature measured by the temperature probe located al the
freecooling coil inlet, and the set
freecooling delta.
Outside temp. < Freecooling IN temp. – Freecooling delta
If this condition is true, the freecooling function will be enabled, by activating/deactivating the dedicated devices.
With electronic control pCO2 there are 4 temperature probes:
3 ways valve inlet;
evaporator inlet (outlet free cooling coil)
evaporator outlet (anti freeze);
external air (suction side of free cooling coil).
3 way valves can be choosen or modulating kind (0-100% of opening) or ON-OFF (all open or all closed in free cooling). Fans in
freecooling can be regulate between the minimum and maximum speed.Simultaneously compressors and
freecooling working is possible (in this case fans are regulate on the basis of condensing pressure).
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.
Chiller compressor
Types of primary makes of chiller compressors normally utilized in mono, tandem or trio configuration, featuring high efficiency to ensure very competitive COP values. 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. Semi-hermetic screw compressor equipped as standard with four capacity steps. The electric motors feature part-winding start technology and are protected from overheating by means of thermistors embedded in the stator winding.
Dual refrigerant circuit evaporator Self-cleaning coaxial type with high turbulence swirl profile (ECA.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÷840)
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.002÷180)
Made of 316 AISI stainless steel with extra-thick anti-condensation matting in closed cell material.
Package water chiller ECA.045/SS B-ES.PH with plate evaporator and recirculating and processing high pressure pump (15 bar)
Copper/copper air condenser (optional)
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.
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 ÷ 840)
Shut-off valves (optional)
Filter/filters drier
Liquid and moisture indicator
Muffler
Desuperheaters or recovery condensers to produce hot water (opt.)
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.
∆t ≤ 1°C
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.
Hydraulic unit in stainlesssteel with double pump
The hydraulic circuit includes:
Hydrulic unit in stainless steel with one pump
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.)
Semigraphics
user interface
Electric
panel ECF.840/CSST.DPA.RV
Hitema's microprocessor control systems perform real-time surveillance and prevention strategies. All the main functions of Hitema units are protected against
anomalous or potentially harmful
operating conditions. This safeguard
simplifies troubleshooting operations
and minimizes maintenance times.
Electric
board ECF.840/CSST.DPA.RV
Electric
board ECFS.180/CS STT.DPAT.
Environmental compatibility
The maximum sensitivity to environmental protection is one of the hallmark values of
Hitema's corporate ethos. That's why Hitema combines its primary goal of delivering efficient and reliable systems with the policy of using eco-friendly HFC refrigerants, which offer the following benefits:
Zero impact on the ozone layer (ODP = 0.00)
Limited contribution to greenhouse effect
High thermal efficiency
Easy control and maintenance
Quality guarantee 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.
Package water chiller
