Many applications, for example in process cooling, call for efficient refrigeration capacity even in winter and transitional periods. If ambient temperatures drop below the refrigeration supply temperature, it is possible to utilise a process of heat transfer between the ambient air and chilled water. This process, referred to as free cooling, lowers the demand for power – and increases your energy efficiency.
We at ENGIE Refrigeration are one of the few manufacturers to cover all versions of free cooling. Whether external, integrated, or with a thermosiphon function.
Free cooling can only work if the ambient temperature lies below the cold water temperature. The advantage of this process is that you do not need to run the refrigeration system’s compressors. This increases your energy efficiency as an operating company and also saves you money. Accordingly, it is especially suitable for applications with a chilled water intake temperature of around 13°C.
To make sure that the chosen solution always provides the ideal balance between free cooling capacity, investment costs and system dimensions, our portfolio includes various system solutions for free cooling. They all have one thing in common: they come from the range of air-cooled QUANTUM chillers, and are integrated mechanically, hydraulically and in terms of control systems.
The QUANTUM chiller’s PLC automatically switches from compressor mode to free cooling mode and back according to the operating conditions. Combined operation is also possible. With this intelligent regulation, you are always on the safe side when it comes to maximum energy efficiency and reducing operating costs
If an integrated free cooling module is suitable for you, you will benefit from the following advantages:
In case of the integrated free cooling module, additional water-air heat exchangers are installed in the condenser modules. Flow through the sandwich structure with free cooling module and the condenser is produced by the same fan.
External free cooling modules offer operating companies the following advantages:
The external free cooling module is placed onto the chiller’s base frame and integrated hydraulically.
The thermosiphon function differs from the integrated and external versions. It offers operating companies the following advantages:
Two motor-driven ball cocks bridge the compressor and the expansion valve in the refrigerant circuit to allow the refrigerant to circulate freely. The low ambient temperature causes the refrigerant to condense in the condenser. From there it flows into the evaporator, where it absorbs heat and evaporates.
free cooling modules are deployed with our ultra- efficient QUANTUM Air. In addition to the many advantages of a free cooling system, you will of course also benefit from our powerful air-cooled series. See for yourself:
Learn more about our QUANTUM Air