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Performance Evaluation of Air-Based Heat Rejection Systems

Author

Listed:
  • Hannes Fugmann

    (Fraunhofer ISE, Fraunhofer Institute for Solar Energy Systems, Heidenhofstr. 2, 79110 Freiburg, Germany)

  • Björn Nienborg

    (Fraunhofer ISE, Fraunhofer Institute for Solar Energy Systems, Heidenhofstr. 2, 79110 Freiburg, Germany
    These authors contributed equally to this work.)

  • Gregor Trommler

    (ILK Dresden, Institute of Air Handling and Refrigeration, Bertolt-Brecht-Allee 20, 01309 Dresden, Germany
    These authors contributed equally to this work.)

  • Antoine Dalibard

    (Centre of Applied Research Sustainable Energy Technology – zafh.net, Stuttgart University of Applied Sciences, Schellingstr. 24, 70174 Stuttgart, Germany
    These authors contributed equally to this work.)

  • Lena Schnabel

    (Fraunhofer ISE, Fraunhofer Institute for Solar Energy Systems, Heidenhofstr. 2, 79110 Freiburg, Germany)

Abstract

On the basis of the Number of Transfer Units (NTU) method a functional relation between electric power for fans/pumps and effectiveness in dry coolers and wet cooling towers is developed. Based on this relation, a graphical presentation method of monitoring and simulation data of heat rejection units is introduced. The functional relation allows evaluating the thermodynamic performance of differently sized heat rejection units and comparing performance among them. The method is used to evaluate monitoring data of dry coolers of different solar cooling field projects. The novelty of this approach is that performance rating is not limited by a design point or standardized operating conditions of the heat exchanger, but is realizable under flexible conditions.

Suggested Citation

  • Hannes Fugmann & Björn Nienborg & Gregor Trommler & Antoine Dalibard & Lena Schnabel, 2015. "Performance Evaluation of Air-Based Heat Rejection Systems," Energies, MDPI, vol. 8(2), pages 1-28, January.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:2:p:714-741:d:45068
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    Citations

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    Cited by:

    1. Ming Gao & Chang Guo & Chaoqun Ma & Yuetao Shi & Fengzhong Sun, 2017. "Thermal Performance for Wet Cooling Tower with Different Layout Patterns of Fillings under Typical Crosswind Conditions," Energies, MDPI, vol. 10(1), pages 1-8, January.
    2. Björn Nienborg & Marc Mathieu & Alexander Schwärzler & Katharina Conzelmann & Lena Schnabel, 2021. "Model-Based Evaluation of Air-Side Fouling in Closed-Circuit Cooling Towers," Energies, MDPI, vol. 14(3), pages 1-15, January.
    3. Moradi, Ramin & Cioccolanti, Luca & Del Zotto, Luca & Renzi, Massimiliano, 2023. "Comparative sensitivity analysis of micro-scale gas turbine and supercritical CO2 systems with bottoming organic Rankine cycles fed by the biomass gasification for decentralized trigeneration," Energy, Elsevier, vol. 266(C).

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