GLY Series glycol recirculating chillers Dry cooling only via air

If only pure dry cooling with air via free coolers is to be used, then the outside temperature must always be lower than that of the medium to be cooled. With dry cooling, the cooling water temperatures depend on the ambient or outside temperature.

Therefore, a dry cooler is particularly suitable when the medium temperatures are higher than the outside temperature; e.g. between 10 °C and 25 °C. The northern European climate is advantageous for the use of free cooling.

Dry cooling therefore does not incur any additional energy costs, as is the case with compressor cooling.

A very economical and environmentally friendly as well as efficient way of process cooling.

Combining a refrigeration system with a free cooler saves considerable operating and energy costs and reduces CO2 emissions. The temperature stability of the cooling medium thus remains constant during process cooling, costs are reduced and the environment is protected.

With this variant, the refrigeration system is only used temporarily, for example in hot summer months or when the outside temperatures are too high. When temperatures are sufficiently low, the free cooler takes over the re-cooling of the water so that the compressor of the refrigeration system doesn’t have to run as often, which can greatly slash electricity costs.

Hybrid cooling is a combination of dry and evaporative cooling. The hybrid cooler uses evaporative cooling (via water spraying) when outside temperatures are too high to produce the desired cooling temperature. This process is also known as adiabatic cooling (evaporative cooling).

Like the dry coolers or glycol coolers, hybrid coolers are also available in horizontal or vertical design as well as in the V-shape. Learn more about this in the section Hybrid cooler.