Sustainable and efficient
Sustainable and efficient

Subject of refrigerants - ecological and economical

Around ten percent of global consumption of electricity is currently spent on air conditioning - tripling by 2050 is expected. Refrigerants are used, some of which favour the greenhouse effect. Consequently, the EU and other countries are gradually abandoning the use of these refrigerants. Alternative refrigerants place changed requirements on the cunstruction of refrigeration and air conditioning systems. The EU F-Gas Regulation brings with it a considerable cost increase with the "phase down" of established refrigerants and the appearance of new substitutes. Wieland offers a wide range of answers to this challenge for its customers.


With comprehensive know-how and years of experience, Wieland accompanies the trend and has developed technologies that are attractive as standard or individual solutions for plant constructors and the environment: from new alloys for high pressure facilities to the significant reduction of refrigerants in heat exchangers - economical, competitive and ecological. The wide range of applications requires a wide variety of answers.

Technology development for the optimization of tubes and heat exchangers for the different properties of certain refrigerants therefore has two main focuses

  • the optimisation of tubes and heat exchangers for the different properties of certain refrigerants and
  • the construction of components which, due to their compact design, also enable a significant reduction in refrigerant.

New refrigerants are tested in our in-house laboratory to provide a basis for designing tailor-made solutions for lower refrigerant requirements - while maintaining high efficiency. In this context, an overall optimisation of the system design and thus the refrigerant charge quantity, is also sensible and possible in order to offer the most economical and competitive solutions possible:

  • For tube bundle condensers and evaporators
    Precisely tailored finned tube solutions enable energy-efficient heat transfer and a reduction in material requirements, refrigerant and therefore costs. Drop-in solutions for increasing the performance of existing shell-and-tube heat exchangers are also possible. In addition to copper, other materials can also be used to replace standard plain tubes. The in-house software ThermalS for the design of tube bundle heat exchangers makes it possible to compare different tube types and technical solutions.
  • For finned heat exchangers
    With the microgroove technology a maximum of efficiency and compactness can be achieved. The small diameters of the inner finned tubes result in an increased efficiency of the heat exchanger and thus enable a significantly reduced refrigerant charge quantity.
  • For the use of CO2 as refrigerant
    The TÜV-certified product portfolio of K65 copper tubes and the K65 system offer robustness and efficiency for high-pressure applications. In addition to its pressure resistance, simple and proven processing technology such as brazing, the system also offers material savings and outstanding heat transfer properties.
Steffen Rieger

Hello, my name is Steffen Rieger
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