EWK

  • AXIAL VENTILATION
  • OPEN CIRCUIT

Open circuit Cooling Tower, pre-assembled from the factory

  • Broad Range: From 4 to 500 m3/h
  • Modular design
  • Laminar and dripping fillings
  • Casing made of fiberglass-reinforced polyester
  • Corrosion free
  • German engineering
  • Materials highly resistant to all aggressive conditions, as well as to extreme temperatures
  • Low energy consumption
  • Pre-assembled at the factory / Easy to install
  • Standard Fill materials in Polypropylene with anti-legionella treatment (SANIPACKING®) – DOWNLOAD

EWK Smart Option

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1

VARIABLE SPEED DRIVES (VSD)
VSD´s adjusts the rotation speed of the fan motors according to the parameters set on the control panel. This device integrates the control software with PID algorithms, which optimize energy consumption and recommend preventive maintenance. The VSD is able to monitor the following useful information about the motor:

– Motor rotation speed.
– Current through the motor coils.
– Voltage.
– Real electric consumption, etc.

2

PRIMARY CIRCUIT PUMPING CONTROL
Regulation of the primary circuit pumping according to the process parameters.

3

WATER MAKE-UP FLOWMETER
This device records the amount of make-up water that is fed into the cooling tower.

4

PACK FOULING MONITORING
The “Smart Cooling Tower” can detect the accumulation of dirt, lime scale, biological film, etc. within the packing. The control panel monitors the level of fouling and can advise when the pack needs to be cleaned or replaced. This avoids any loss of thermal performance due to fouling.

5

OIL / MOTOR TEMPERATURE PROBE
This sensor measures vibrations in the fan/motor set in real time. If abnormal vibration is detected it can send an alarm signal or even stop the fan. This way we will prevent damage to the fan.

6

WATER LEVEL CONTROL
This sensor is located in the water basin and constantly monitors the water level and compares it against the set high and low level parameters. The sensor will send high and low level alarms to the control panel should the water level fall out of the set parameters, preventing the sump from draining down or overflowing. Additionally, in the event of a low level alarm the control panel will switch off the electric heater so as not to damage the casing. When the level is normal the equipment works with no restriction.

7

VIBRATION SENSOR
This sensor measures vibrations in the fan/motor set in real time. If abnormal vibration is detected it can send an alarm signal or even stop the fan. This way we will prevent damage to the fan.

8

PRESSURE PROBES

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ELECTRIC HEATER
This heating element is designed to heat the water in the area closest to the cooling tower discharge, thus ensuring that the pumps are not starved of water upon start up. Thanks to this device, the water in the sump is prevented from freezing avoiding damage to hydraulic elements. The control panel can set the maximum and minimum temperature and the required hysteresis in the sump.

10

CONECTIVITY
Using a Modbus TCP/IP (two way) communication system, full remote access of the ”Smart Cooling Tower” is possible anywhere in the world using a PC or smart device. This system allows full monitoring of the towers functionality and ensures that any alarms are received and actioned by key personnel on or off site.

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VARIABLE SPEED DRIVES (VSD)

12

INLET TEMPERATURE PROBES

13

INLET TEMPERATURE PROBES
Inlet temperatures are constantly monitored using built in temperature probes. The control panel uses the temperatures obtained to optimize the tower functionality and control using the VSD

14

VIBRATION SENSOR / TEMPERATURE PROBE

15

TEMPERATURE AND HUMIDITY PROBE (STHE)

16

ELECTRIC HEATER

17

PRESSURE PROBES
PRIMARY: Allows accurate monitoring of the process water flow rate.

18

CONTROL PANEL
The control panel oversees and monitors the autonomous management of the ”Smart Cooling Tower”, based on the set parameters and the information gathered from the various probes installed. The main component is a PLC that integrates algorithms PID to optimize the power consumption of the fan motors and circulating pumps motors, according to the set-point values introduced. Please note that the circulating pumps are only available on our closed-circuit tower range.

The control panel comes as standard with a 7” touch screen, allowing full operational control of the ”Smart Cooling Tower”. As an optional extra the screen size can be increased to 10”.

19

TEMPERATURE AND HUMIDITY PROBE (STHE)
The Temperature and Humidity sensor monitors the outdoor conditions around the cooling tower, making it possible to remotely appraise the performance of the ”Smart Cooling Tower”, based on the design criteria.

20

SCHEDULING CONTROL
Using the ”Smart Towers” scheduling capabilities to only run the tower during set periods of the day, reduces energy consumption over a 24hr period. As a result, less energy is used and lower noise levels are observed during off peak hours when there is less demand for heat rejection.

21

TEMPERATURE PROBE IN THE BASIN
It is installed at the sump to monitor the cold-water temperature. This probe controls the operation of the electric heater in the sump.

Working Principles

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/litre. The cold water produced is returned into the process to re-iniciate the cycle. The equipment with this evaporative refrigeration principle are very important for energy efficiency.

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.

Additional equipment

  • PRFV with SANIPACKING® treatment casing
  • Access ladder & Hand rail to the fan motor
  • Access door in Polypropylene
  • Vibration switch for ventilation equipment
  • Electric motor frequency converters
  • PTC sensor for the motor
  • Exhaust silencer
  • Low noise fan
  • Sensors for the level of water in the basin.
  • Winter pack (Thermostat & Immersion heater) to protect from low temperatures
  • Water treatment dosing system
  • Attenuators of noise from the drops in the basin

Technical Features

Model *Dissipation
kw		 Empty weight
kg		 Service weight
kg		 Fan power
kw		 Long
mm		 Wide
mm		 High
mm		 Dim. Drawing Plan DWG
EWK 036/06 46 51 115 0.37 720 615 1745 seleccionar seleccionar
EWK 064/09 100 126 235 0.55 999,5 832 2225 seleccionar seleccionar
EWK 144/09 220 218 490 2.2 1395 1269 2925 seleccionar seleccionar
EWK 225/09 350 355 876 3.0 1690 1557 3100 seleccionar seleccionar
EWK 324/09 503 466 1103 4.0 1971 1850 3425 seleccionar seleccionar
EWK 441/09 696 633 1595 5.5 2330 2150 3459 seleccionar seleccionar
EWK 680/09 1080 1016 3347 7.5 3395 2381 4550 seleccionar seleccionar
EWK 900/09 1320 1131 3917 11.0 4415 2093 4485 seleccionar seleccionar
EWK 930/09 1512 1390 4578 11.0 4235 2381 4690 seleccionar seleccionar
EWK 1260/09 1955 1940 6516 15.0 4285 3395 4770 seleccionar seleccionar
EWK 1800/09 2735 2609 10134 22.0 4605 4300 4805 seleccionar seleccionar

* Heat rejection at the following conditions: Tin: 35,0 ºC, Tout: 30,0 ºC, Twb: 24,0 ºC

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