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Nachhaltigkeitsanalyse einer zweistufigen adiabaten Kühlung

Translated title of the contribution: Sustainability analysis of a two-stage adiabatic cooling system
  • Yannick Dambaur

    Research output: Types of ThesesMaster's Thesis / Diploma Thesis

    2 Downloads (Pure)

    Abstract

    This master's thesis examines the sustainability of two-stage adiabatic cooling as a potential
    alternative to conventional compression refrigeration machines for air conditioning
    in industrial buildings. The aim is a holistic evaluation of ecological and economic aspects.
    A particular focus is placed on CO2 emissions, electricity and water consumption
    and the resulting operating costs. Furthermore, an estimation of the CO2 emissions generated
    during production and the inclusion of investment costs enables a holistic comparison
    between the technologies.

    The two-stage adiabatic cooling is a combination of indirect and direct evaporative cooling.
    As a result, the system completely dispenses with refrigerants and energy-intensive
    compressors. However, the performance achieved depends on the prevailing climatic conditions
    and may be below the specific requirements at times. Methodologically, the analysis
    is based on a site-specific simulation. Three different locations are considered in order
    to enable a differentiated view of performance under different climatic conditions.

    The results show that two-stage adiabatic cooling is a sustainable and economical alternative
    to conventional compression chillers under the right climatic conditions. At locations
    with climatic conditions such as Linz, two stage adiabatic cooling provides usable
    supply air temperatures with lower CO2 emissions and operating costs than a comparable
    compression chiller. It can be operated particularly efficiently in dry environments, such
    as in Thessaloniki. Here, both the operating costs and the CO2 emissions are significantly
    lower than with a comparable compression chiller. However, due to the dependence of
    the supply air temperatures on the outside air temperatures, there are a high number of
    hours per year at these locations in which the target temperatures are not reached. In
    Thessaloniki, this affects 24% of operating hours. Hybrid systems are already being used
    to remedy this weakness of two-stage adiabatic cooling. These have a significantly
    smaller compression chiller installed in order to be able to provide additional cooling if
    required.
    Translated title of the contributionSustainability analysis of a two-stage adiabatic cooling system
    Original languageGerman (Austria)
    Supervisors/Advisors
    • Angerbauer, Albert, Supervisor
    Publication statusPublished - 30 Jun 2025

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