Counterflow Cooling Towers – With a Counterflow Cooling Tower, the warm process water is sprayed under pressure onto the fill media.

Because of the way the water enters the counterflow cooling towers, it isn’t possible to use the flow of gravity. The air is pushed upwards vertically, so it is “counter” to the water flow which is flowing vertically down. The pipes and nozzles within the distribution system must be carefully positioned to ensure airflow goes unrestricted. The air and water flows are effectively opposite to each other. Hence the name of the design.

The air enters the counterflow cooling tower underneath the fill media and is taken up in a vertical fashion. It is pushed or sucked by the fan at the top of the tower. The process water sprayed from near the top of the tower flows downwards into the fill, but opposite to the air flow. The cooled water collects in a basin at the bottom of the tower. As with a crossflow design tower the air is discharged from the top of the tower. Similarly, it’s the interaction of the water and air flow that causes evaporation and achieve the cooling effect needed.

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Full Turnkey Solutions

Aqua’s aim is to build a life-long relationship with our customers. Becoming essentially a “one stop shop” for all your temperature control requirements, for now and the future. The three divisions of our business – Sales, Hire & Service – enable us to help clients every step of the way.

Our USP is our ability to offer clients a complete turnkey solution. We’ll work with you from initial site visit and system design to installation and commissioning. Our services include:

  • Free design consultancy, including AutoCAD drawings, 3D modelling and energy calculations
  • Mechanical and electrical installation – encompassing civil works, offloading & positioning, pipework installation, mains power and cabling, all CDM compliance, full project management and delivery
  • Aftersales support – including preventive maintenance plans to maximise product lifespan and efficiency

Our business is built on our core values of technical excellence, care, integrity and a “can do” attitude. We train all our people to be specialists in what they do – innovative engineers dedicated to providing practical, effective and efficient solutions supported by second-to-none customer service.

Case Study

Aqua Link Up With Arthur McKay

Aqua Group’s latest cooling tower installation centred around a 3.4 MW project for the comfort cooling system at Lloyds Bank in Halifax. The Lloyds Banking Group commissioned Arthur McKay Building Services with an initial design criteria. That specified inlet and outlet temperatures of 37°C and 27°C respectively, a 293.8m³/h flow rate, and a wet bulb temperature of 20°C.

In response, Aqua supplied and installed a 3.4 MW cooling system. Comprising four stainless steel SPX Marley cooling towers. Aqua Group is the approved UK distributor for the Marley range and the system was designed to incorporate spare capacity to allow maintenance to be carried out. The system’s overall capacity is in excess of 130%, so even with one tower out of operation the remaining three will still provide 98.4% capacity. The towers, from Marley’s NC range, have been supplied in stainless steel to increase the versatility and life-span of the installation. “The NC model combines high capacity with high efficiency and a smaller profile, making it the ideal choice for larger applications”, explains Peter Fowles, Aqua’s Projects Engineer.

The need for the spray system makes the design’s heat transfer properties more effective. This is because the water is broken up within the spray. Equally, the distribution system makes the counterflow cooling towers less likely to freeze in low ambient. That said, when compared to crossflow towers, the counterflow cooling tower is noisier. Due to the water flow and the spraying effect, plus there are associated costs with operating the required pumps. Maintenance can also be more complicated than with a crossflow variant.

Other benefits of the counterflow design include smaller footprints. This is more suitable if space is limited, these designs also tend to be shorter so more compact overall. Overall performance is helped by the fact that the driest air meets the coldest water.

Advantages Of Cooling Towers

  • Closed loop cooling
  • Reduced water treatment costs
  • Reduced corrosion in cooling water system
  • Plug and play system
  • Controls for ancillaries, such as pumps, heaters etc., can be incorporated in our panels
  • Low noise levels, low input powers
  • Inverter control or EC fans are available across all units
  • Range of materials available offering extended life in varying environments
  • Modern, safe alternative to cooling towers, offering reduced running and maintenance costs

Free Site Survey

If you have a requirement for a cooling tower but would like help in navigating the different designs and benefits and limitations of each then why not give the Aqua team a call today? We can help you ascertain exactly which type is required for your specific application and guide you towards the most cost effective and efficient solution. We’ll also happily come to site and give you free technical advice. As well as all the help you need with production selection.

You May Also Want To Consider

GRP Cooling Towers

Adiabatic Coolers

Crossflow Towers





counterflow cooling towers


Why Call Aqua?

Established in 2001, Aqua Group are a market leading force in the design and supply of innovative temperature control solutions. Our team has a vast product knowledge base and years of application experience and is focused on finding the most energy efficient and price competitive solution for your specific business needs.

Whether you’re an end user looking for a bespoke cooling system design or a trade customer trying to source a single chiller unit, our specialist engineers are on hand to help. Aqua Group’s core values – Technical Excellence, Can-do Attitude, Integrity and Care – are at the heart of everything we do, and we always strive to achieve the highest level of customer service experience.

For help with product selection and technical advice call our sales team today on 0333 004 4433.