LIQUID COOLERS

Dry coolers are used in many applications in HVAC, in industrial processes, in cogeneration and in refrigeration, when you need to cool a liquid bringing it from a temperature T1 to T2, where T2 is always higher than the ambient temperature. The new series of dry coolers, liquid coolers and oil coolers of HTE are fully customizable according to the needs of the plant. The plant engineer can then count on 6 lines of product [Table], [V-Form], [Drain], [H-Flow], [Jumbo], [X-cross] divided between one and two rows of axial fans, with AC motors or the more efficient EC fans with brushless technology.

The range is so extensive, that it meets the most demanding requirements of thermal capacity, acoustic performance and dimensions, making HTE dry coolers unique for performance, reliability and durability. The dry cooler is designed depending on the customer's requests, to operate different types of fluids: water, solutions of liquid brine with ethylene glycol, propylene gycol, HYCOOL, Freezium but also other types of fluids such as vegetable or synthetic oils, food-liquids or process industry, just to name a few. The dry coolers in "wet"-execution are equipped with an adiabatic device that includes a high-pressure pump and multiple sets of spray atomizers to take advantage of the additional temperature decrease due to the evaporation of water during periods of high outdoor temperature.

The unit can also be equipped with a programmable PLC (optional). Its functions are directly configurable from a Touch screen panel,  7 "(10") size or remotely via MODBUS, PROFIBUS, PROFINET, BACNET. The user then has the ability to display the operating conditions, change the "set point" temperature, find information about scheduled maintenance, check the diagnostics, track listings of alarms; fully compatible for integration into SCADA architectures. Or request multi circuit, surface increased with special hydrophilic fins, pre-painted, copper or subjected to anti-corrosion treatments executions. Special versions with structure and panels made ​​entirely of stainless steel are also available.

DRY COOLERS: ADVANTAGES IN COMPARISON TO EVAPORATIVE TOWERS

• Closed circuit: elimination of water consumption and expensive water-treatments
• No risk of corrosion, clogging, limited fouling
• No emission of steam
• No contamination of air and water
• Wide range of products fully customizable in design and performance
• High flexibility depending on environmental conditions and plant
• Power consumption always proportional to the actual needs
• Low ownership costs
• Adiabatic humidification (Legionella Free) in "wet"-execution (optional)
• Centralized supervision (optional)

Features

Data sheet

Fittings

Generality

Configurations	903 models in catalogue for the WHT1 serie; 774 models in catalogue for the WHT2 serie; Customized solutions; Special materials available; Surface protection treatments; Switchboards and control logics
Coils	Coppers pipes with 10mm, 12mm and 16mm diameter; Aluminium fins with stackered tube geometrie or alligned with diameters between 1,6 mm to 6 mm; In standard configuration getween 2 and 6 rows; Floating side support to allow a better thermal expansion
Structure and cover panels	Standard execution with aluminium cover panels; Fan panels made out of a signle metal sheet; Stainless steel brackets; Stainless steel screws and bolts for every removable element; Self-supporting frame (standard for Jumbo and Magnum, for Table units over 6000 mm coil length)
Ventilation	Fan diameter between 500 and 1.000 mm; 5 power levels for each diameter in standard configuration; AC 400V 3̴~ (3-phase) or 200V 1~ (single phase) motors, both for 50Hz; Upon request 60 Hz, EC-brushless or ATEX versions.

Materials

	Fins	Tubes	Manifolds	Metal sheets
Al - Aluminium
Al-P Prepainted aluminium
Al-H Hydrofillic aluminium
Cu - Copper
Ot - Brass
Hot bath zinc steel
Stainless steel
Legenda	Standard Optional Not available

Treatments

Protecting surface treatment of the exchanger element	Blygold® Electrolitic zinc coating Cataforesis Fin Guard Silver® Epoxy coating
Cover panels	Special paints according to RAL specifications

Fans

All H.T.E. units are equipped with high efficiency multiple wing fans according to the eco-compatible directive UE nr. 327/2011. The electric motors are thermally protected with IP54 protection class, IP55 according to IEC/EN 60529/ DIN 40050. The axial fans with external rotor are of the service-free type, with hermetic bearings according to DIN 6252 with lifetime lubrication, statically and dynamically trimmed according to ISO 1940/1. The windings have different isoltation class, varying between the standarf F class, up to H class for particularly demanding applications. The functionning limits are between -30°C and +60°C for the standard motor configuration. Other motors are available upon request. The three-phase motors are ready for the double connection (star, delta or with switching device). All fans motors are designed to be connected to a tension or a frequency regulation device, to control rotation speed and noise level. There are 5 different performance sizes at disposal, ensuring excellent performances through the combination of installed power, noise level and respect of the declared consumption.
Optional	• Cabled fans ready for the connection on a contact board according to EN 60204-1 rule; • 60Hz versions; • Special voltages; • According to ATEX-regulations; • In pushing or reversible version; • With EC-bruschless electronic modulating motors; • Centrifugal fans; • Regulation systems; • HTE Process Control Manager;
According to the type of ventilator the motor data may vary. Please remark that the energy consumption will vary in function of the air temperature and the load conditions. We reserve ourselves the right to use fans made by different manufacturers. For the corresponding specific electrical data refer yourself to the type of unit or fan model.

Accessories

Hydraulics	• Special hydraulic components (valves, fittings, flanges, rotalock or victaulic connections, compensators, temperature or pressure indicators ....) • Customized hydraulic or refrigerant connections an particular solutions • Multiple circuit executions; • Adiabatic misting system (connected to hydrofillic fins); •PED system with adiabatic panels; • UV sterilizing lamp; • Pump stations with stainless steel rotor and cochlea´s single- or multiple pumps;
Electrics, control and regulation	• Run switches; • Cabling in terminal box (EN 60204-1); • Cabling in switchbox (EN 60204-1); • Motor protection device with thrmal contact; • Triac fan speed regulator; • Frequency control and sinus-filters; • HTE Process Control Manager;
Structural components	• Antivibrtion dampeners; • Customized lifting brackets; •Self-supporting frames in pikled welded stainless steel; • Container installations; • Custom-made skids;

Reference guidelines

97/23/CE PED 2006/42/CE MD 2002/95/CE RoHS Direttiva 2004/108/EC EMC Direttiva 2006/95/CE LVD Direttiva 2009/125/CE Erp EN ISO 13857:2008 EN 60204-1 EN 1048:2000

• DRY. Low sound emission AC or EC fans and unit standard construction (on request wired connection box with terminal plate or wired switchboard)
• ECO. Low sound emission AC or EC fans with fan speed controls (wired in switchboard)
• WET. Low sound emission AC or EC fans with fan speed controls and adiabatic water spray system (wired in switchboard)