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Environment & sustainability

Sustainability, environmental and climate protection have been an essential part of our company's philosophy for many years. Our high-quality products are therefore ecologically sensibly aligned with a long service life and low power consumption. We also implement system solutions for heat recovery and exhaust use with our customers when possible.

Our target is constant improvement of the ratio of useful energy to energy consumption for our refrigeration solutions. Our process visualisation and energy monitoring enable customers to continually optimise their operations.

Our large heat pumps work with natural heat sources and make an important contribution to reducing the primary power demand. Another important process that we drive actively is consistent substitution of chemical by natural refrigerants.

Natural refrigerants have many advantages

Natural refrigerants are available without limitation, cost-efficient and can be used in nearly any refrigeration application today. Natural refrigerants also have a very low greenhouse potential as compared to synthetic refrigerants (GWP). Another great benefit when using natural refrigerants is their high energy efficiency. You as a company can profit doubly – by cost savings and environmental protection.

Natural refrigerants

Carbon dioxide (CO2, R744)

Under ecological and safety-technical aspects, CO2 is a perfect refrigerant for use in chillers. It is non-toxic, not flammable, chemically inert and has no ozone depletion potential (ODP = 0). When used as refrigerant in closed circuits, it has a negligible greenhouse potential (GWP = 1). CO2 also has a high volumetric cold output.

Ammonia (NH3, R717)

Ammonia is one of the best-known natural refrigerants and has been used in industrial cooling plants for more than 100 years. The refrigerant is colourless under atmospheric pressure. Its pungent smell is noticeable. Ammonia has no ozone-depletion potential (ODP = 0) and no direct greenhouse effect (GWP = 0). Contribution to the indirect greenhouse effect is also low as compared to other refrigerants due to the high energy efficiency. This natural refrigerant is flame-retardant and only partially flammable.

Hydrocarbons: Propane (C3H8, R290), propylene (C3H6, R1270)

Hydrocarbons, such as propane and propene (propylene) are pressure-liquefied colour- and nearly odourless gases that have no ozone-depletion potential (ODP = 0) and no direct greenhouse effect (GWP = 3) to speak of. With their outstanding thermodynamic properties, hydrocarbons are particularly energy-saving refrigerants. Hydrocarbons are flammable – the connected safety devices lead to near-zero refrigerant losses.

More information / downloads

•   Chiller with natural refrigerants (Propane/propylene-chiller, Ammonia-chiller)