EWK-A - Vistech Cooling Systems

Closed Circuit Adiabatic Water Coolers, Legionella Free

Close-circuit-adiabatic-water-coolers-Legionella-free443244

EWK-A-730-Horizontal tfg45g43

General Features

FGRP casing and Cu-Al heat exchanger
EC fans with high efficiency
Water treatment not necessary
Aerosol free
Two full automatic working options

Documentation

DOWNLOAD Assembling and Operation Manual
DOWNLOAD Product Catalogue
DOWNLOAD Sound Levels

Configuration

Model	* Dissip. (kW)	Dry Weight (kg)	Service Weight (kg)	Fan Power (kW)	Length (mm)	Width (mm)	Height (mm)	Dim. Drawing	Plane DWG	Technical Features
EWK-A 730/3	263	1461	1710	2 x 4.1	3860	2070	2523	Open	Download	[-]
EWK-A 730/4	298	1661	1949	2 x 4.1	3860	2070	2523	Open	Download	[-]
EWK-A 1040/3	392	2192	2559	3 x 4.1	5460	2070	2523	Open	Download	[-]
EWK-A 1040/4	449	2492	2917	3 x 4.1	5460	2070	2523	Open	Download	[-]
EWK-A 1350/3	525	2922	3419	4 x 4.1	7060	2070	2523	Open	Download	[-]
EWK-A 1350/4	596	3322	3897	4 x 4.1	7060	2070	2523	Open	Download	[-]
EWK-A 1670/3	655	3652	4280	5 x 4.1	8660	2070	2523	Open	Download	[-]
EWK-A 1670/4	745	4153	4878	5 x 4.1	8660	2070	2523	Open	Download	[-]
EWK-A 1980/3	782	4383	5117	6 x 4.1	10260	2070	2523	Open	Download	[-]
EWK-A 1980/4	897	4983	5833	6 x 4.1	10260	2070	2523	Open	Download	[-]
EWK-A 2290/3	915	5113	5977	7 x 4.1	11860	2070	2523	Open	Download	[-]
EWK-A 2290/4	1046	5814	6814	7 x 4.1	11860	2070	2523	Open	Download	[-]
* Heat rejection at the following conditions: Tin: 35,0 ºC, Tout: 30,0 ºC, Twb: 24,0 ºC

Additional Equipment

Coated fan
Master control
Temperature sensor control

Working Principles

More Cooling Towers

Open Circuit

Compact open cooling towers pre assembled at factory

EWK

Open Circuit

Compact Open Cooling Towers Pre-Assembled At Factory

- Compact Polyester Casing
- Plastic Internals for complete corrosion resistance
- Low Energy Consumption
- Easy Maintenance
- Broad Range (From 4 to 500 m^3/h)
- Modular Design
- Film flow and Splash Packings
- DOWNLOAD Assembly and Operation Manual
- DOWNLOAD Product Catalogue
- DOWNLOAD Sound Levels
- DOWNLOAD Nozzel Pressure Drop
1. Sound Attenuator.
2. Access ladder & Hand rail to the fan motor.
3. Vibration Switch.
4. Winter Pack (Thermostat & immersion heater)
5. Water treatment systems (Dosing, bleed)
6. Variable speed drives. Control panels
Evaporative cooling towers are the most energy efficient means of cooling water. Hot process water or condenser water from a chiller enters the distribution system at the top of the cooling tower and falls by gravity in counter-flow to the air being drawn or forced through the cooling tower by the fan. As the air passes the water a small proportion is evaporated cooling the remaining water which is collected in the cooling tower sump. The cooled water is then returned to the process or chiller.
The difference between the required cold water temperature and the wet bulb temperature (called the approach temperature), is significant in determining the size of the tower. The smaller the approach the larger the required heat exchange surface. The approach temperature must be at least 3-4 °C.
The heat exchange surface known as packing provides close contact between the air and water in open towers. High efficiency film packings provide a large surface area over which the cooling water is spread increasing the evaporative cooling effect. Splash packings can be selected for applications where the water quality is poor.

Closed Circuit

EWK I

EWK-I

Closed Circuit

Closed Circuit Cooling Towers With External Stainless Steel Heat Exchanger

- FGRP Casing and stainless steel plate heat exchanger
- Direct driven fan motor (no pulleys and belts)
- Total corrosion resistance
- Easy cleaning
- Easy installation
- DOWNLOAD Assembly and Operation Manual
- DOWNLOAD Product Catalogue
- DOWNLOAD Sound Levels
- DOWNLOAD Nozzel Pressure Drop
1. Sound Attenuator.
2. Access ladder & Hand rail to the fan motor.
3. Vibration Switch.
4. Electric water control level in the Basin .
5. Winter Pack (Thermostat & immersion heater)
6. Variable speed drives, control cabinets.
7. Water treatment systems (Dosing, bleed)
The fluid to be cooled (usually water) flows through the water passages of the stainless steel plate heat exchanger without coming into direct contact with the external air, preventing dirt or pollution from entering the primary water circuit. The heat is transmitted from the fluid through the wall of the heat exchanger plates to the cooling water from the tower, which is being continuously circulated through the heat exchanger.
The fan at the top of the tower draws air through the tower in counter-flow to the water, thereby evaporating a small amount of the re-circulating secondary circuit water. The evaporative process causes cooling of the remaining water and the heat is released to atmosphere,. The remaining water is re-circulated by the spray water pump from the basin to the spray nozzles. A small quantity of heat is transmitted by sensible heat transfer to the external air, in a similar manner to an air cooler.

Closed Circuit

EWK C

EWK-C

Closed Circuit

Closed Circuit Cooling Towers With Internal Galvanised Steel Coil.

- Low sound level
- Low height
- No vibration transmission
- FRP Casing, reduced maintenance and total corrosion protection
- Plastic internals
- DOWNLOAD Assembly and Operation Manual
- DOWNLOAD Sound Levels
1. Sound Attenuator.
2. Access ladder & Hand rail to the fan motor.
3. Vibration Switch.
4. Electric water control level in the Basin .
5. Winter Pack (Thermostat & immersion heater)
6. Variable speed drives.
7. Water treatment systems
Evaporative cooling towers are the most energy efficient means of cooling water. Hot process water or condenser water from a chiller enters the distribution system at the top of the cooling tower and falls by gravity in counter-flow to the air being drawn or forced through the cooling tower by the fan. As the air passes the water a small proportion is evaporated cooling the remaining water which is collected in the cooling tower sump. The cooled water is then returned to the process or chiller.
The difference between the required cold water temperature and the wet bulb temperature (called the approach temperature), is significant in determining the size of the tower. The smaller the approach the larger the required heat exchange surface. The approach temperature must be at least 3-4 °C.
The heat exchange surface known as packing provides close contact between the air and water in open towers. High efficiency film packings provide a large surface area over which the cooling water is spread increasing the evaporative cooling effect. Splash packings can be selected for applications where the water quality is poor.

Evaporative Condenser

EWK E

EWK-E

Evaporative Condenser

Evaporative Condensers For Refrigerant Gases.

- Corrosion free
- Reliable operation
- Direct coupled. No belts and pulleys
- Low energy consumption
- HCS coil (High Conductivity System)
- DOWNLOAD Assembly and Operation Manual
- DOWNLOAD Product Catalogue
- DOWNLOAD Sound Levels
1. Sound Attenuator.
2. Access ladder & Hand rail to the fan motor.
3. Vibration Switch.
4. Electric water control level in the Basin .
5. Winter Pack (Thermostat & immersion heater)
6. Variable speed drives
7. Water treatment systems
The refrigerant gas is circulated through the coil whilst the secondary circuit water is sprayed over the external surfaces of the tubes. At the same time, the fan induces airflow through the coil evaporating a small part of water. The process of evaporation causes heat to be extracted from the gas through the wall of the coil tube. This evaporation is owed to the heat obtained from the gas in the heat exchanger, thereby cooling and condensing the gas itself.
EWK evaporative condensers are feature high performance coilsand completely corrosion resistant FRP casingspolyester . The aerodymanic design of the condenser top casings ensures low energy consumption. The tower design and construction facilitates easy maintenance. The condenser coil can also be easily removed for replacement or descaling should water conditions necessitate this.

Open Circuit

EWK D

EWK-D

Open Circuit

Low Noise And Low Profile Centrifugal Cooling Towers

- Low sound level
- Low height
- No vibration transmission
- FRP Casing, for low maintenance and total corrosion resistance
- Plastic internals for complete corrosion resistance
- Modular design
- Integrated frame support
- Epoxy coated fans
- DOWNLOAD Assembly and Operation Manual
- DOWNLOAD Product Catalogue
- DOWNLOAD Sound Levels
- DOWNLOAD Nozzel Pressure Drop
1. Sound attenuators for air inlet and outlet.
2. Winter Pack (Thermostat & immersion heater)
3. Variable speed drives
4. Dosing systems for water treatment
Evaporative cooling towers are the most energy efficient means of cooling water. Hot process water or condenser water from a chiller enters the distribution system at the top of the cooling tower and falls by gravity in counter-flow to the air being drawn or forced through the cooling tower by the fan. As the air passes the water a small proportion is evaporated cooling the remaining water which is collected in the cooling tower sump. The cooled water is then returned to the process or chiller.
The difference between the required cold water temperature and the wet bulb temperature (called the approach temperature), is significant in determining the size of the tower. The smaller the approach the larger the required heat exchange surface. The approach temperature must be at least 3-4 °C.
The heat exchange surface known as packing provides close contact between the air and water in open towers. High efficiency film packings provide a large surface area over which the cooling water is spread increasing the evaporative cooling effect.

Open Circuit

EWK DC

EWK-DC

Open Circuit

Closed Circuit Cooling Towers With Internal Galvanised Steel Coil.

- Low sound level
- Low height
- No vibration transmission
- FRP Casing, free of maintenance and corrosion
- Fully assembled in our factory
- Integrated frame support
- CoilSulzer H.C.S (High Conductivity System)
- Modular construction
- Epoxy coated fans
- DOWNLOAD Assembly and Operation Manual
- DOWNLOAD Sound Levels
1. Sound attenuators for air inlet and outlet.
2. Electric water control level in the Basin.
3. Winter Pack (Thermostat & immersion heater).
4. Variable speed drives.
5. Water treatment dosing systems
6. Switch level control
The fluid to be cooled (usually water or glycol water) flows through the tubes of the coil without coming into direct contact with the external air, preventing dirt or pollution from entering the primary water circuit. The heat – from the fluid is conducted through the tube walls to the water, which is sprayed over the coil.
The fan at the base of the tower forces air in counterflow to the water, causing a small proportion of the spray water to be evaporated. The evaporative process cools the remaining water causing heat from the coil surface to be transferred from the spray water to the atmospheric air passing through the tower. The remaining water is re-circulated by the spray water pump from the basin to the spray nozzles. (Secondary circuits). A small quantity of heat is also transmitted by sensible heat exchange to the atmospheric air in a similar manner to an air cooler.

Open Circuit

EWB

EWB

Open Circuit

Open Cooling Towers For Big Volumes And Assembled On Site.

- Modular design
- Corrosion free
- Industrial applications
- Easy maintenance
- Big capacity (500 – 10.000 m3/h)
- DOWNLOAD Assembly and Operation Manual
- DOWNLOAD Product Catalogue
- DOWNLOAD Sound Levels
- DOWNLOAD Nozel Pressure Drop
1. Sound Attenuator.
2. Access ladder & Hand rail to the fan motor.
3. Vibration Switch.
4. Frequency converter
5. Basin in FGRP
Cooling towers bring a cold and dry air mass in counter-flow to hot water that comes from an industrial or air conditioning process. Part of this water evaporates, cooling the rest. The necessary heat for this is approx.597 Kcal/liter. The cold water produced is returned into the process to re-initiate the cycle. The equipment with this evaporative refrigeration principle are very important for energy efficiency in industrial processes.
The difference between the required cold water temperature and the wet bulb temperature (called cooling limit distance), is significant to determine the size of the tower. The smaller the cooling distance is, the bigger the interchanging surface is needed. The limit distance must be of at least 3-4º C.
In open cooling towers there is a close contact water-air, which is bigger thanks to the fill packings, that provide a big surface of exchange, improving performance and evaporation. There are different kinds of fill packing for different water quality.

Closed Circuit

Close-circuit-adiabatic-water-coolers-Legionella-free443244

EWK-A

Closed Circuit

Closed Circuit Adiabatic Water Coolers, Legionella Free

- FGRP casing and Cu-Al heat exchanger
- EC fans with high efficiency
- Water treatment not necessary
- Aerosol free
- Two full automatic working options
- DOWNLOAD Assembling and Operation Manual
- DOWNLOAD Product Catalogue
- DOWNLOAD Sound Levels
1. Coated fan
2. Master control
3. Temperature sensor control