Performance Evaluation of Air-Based Heat Rejection Systems
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.
Year of publication: |
2015
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Authors: | Fugmann, Hannes ; Nienborg, Björn ; Trommler, Gregor ; Dalibard, Antoine ; Schnabel, Lena |
Published in: |
Energies. - MDPI, Open Access Journal, ISSN 1996-1073. - Vol. 8.2015, 2, p. 714-741
|
Publisher: |
MDPI, Open Access Journal |
Subject: | performance evaluation | cooling tower | dry cooler | solar cooling | heat exchanger |
Saved in:
freely available
Extent: | application/pdf text/html |
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Type of publication: | Article |
Classification: | Q - Agricultural and Natural Resource Economics ; Q0 - Agricultural and Natural Resource Economics. General ; Q4 - Energy ; Q40 - Energy. General ; Q41 - Demand and Supply ; Q42 - Alternative Energy Sources ; Q43 - Energy and the Macroeconomy ; q47 ; Q48 - Government Policy ; Q49 - Energy. Other |
Source: |
Persistent link: https://www.econbiz.de/10011127938
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