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Potential for waste heat utilization of hot‐water‐cooled data centers: A case study

Oltmanns, Johannes ; Sauerwein, David ; Dammel, Frank ; Stephan, Peter ; Kuhn, Christoph (2024)
Potential for waste heat utilization of hot‐water‐cooled data centers: A case study.
In: Energy Science & Engineering, 2020, 8 (5)
doi: 10.26083/tuprints-00016187
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: Potential for waste heat utilization of hot‐water‐cooled data centers: A case study
Language: English
Date: 9 January 2024
Place of Publication: Darmstadt
Year of primary publication: 2020
Place of primary publication: Chichester
Publisher: John Wiley & Sons
Journal or Publication Title: Energy Science & Engineering
Volume of the journal: 8
Issue Number: 5
DOI: 10.26083/tuprints-00016187
Corresponding Links:
Origin: Secondary publication DeepGreen

The electric energy demand of data centers in Germany has grown rapidly from 10.5 TWh/a in 2010 to 13.2 TWh/a in 2017, an average of 25% of which are used to fulfill the data centers' cooling demand. In order to increase its energy efficiency, TU Darmstadt applies a new cooling concept in the next generation of its high‐performance computing data center “Lichtenberg II.” Instead of the current air‐cooled servers with water‐cooled rear doors at 17‐24°C, the new data center will be equipped with direct hot‐water cooling for the high‐performance computer, supplying heat at a temperature of 45°C. The high‐temperature waste heat is used for heating purposes on the university's campus Lichtwiese. For waste heat utilization, two concepts are presented, either integrating the heat in the return line of the district heating network or using it locally in buildings located near the data center. Reductions in CO₂ emission and annuity are generated both by decreased compression cooling demand for the data center and by decreased heat generation due to waste heat utilization. Depending on the scenario, a total of 20%‐50% of the waste heat emitted by the high‐performance computer can be used for heating purposes, while the remaining heat is dissipated efficiently via free cooling without additional energy demand for mechanical chillers. CO₂ emission can be decreased by up to 720 tCO₂/a, representing a reduction of about 4% of the total emission at campus Lichtwiese. TU Darmstadt is currently implementing the waste heat integration into its district heating network and will benefit from this concept starting in 2020.

Uncontrolled Keywords: data center, district heating, high‐performance computer, hot‐water cooling, waste heat utilization
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-161875
Classification DDC: 300 Social sciences > 333.7 Natural resources, energy and environment
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
600 Technology, medicine, applied sciences > 624 Civil engineering and environmental protection engineering
700 Arts and recreation > 720 Architecture
Divisions: 15 Department of Architecture > Fachgruppe F: Gebäudetechnik > Entwerfen und nachhaltiges Bauen
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Exzellenzinitiative > Graduate Schools > Graduate School of Energy Science and Engineering (ESE)
Date Deposited: 09 Jan 2024 12:10
Last Modified: 21 Feb 2024 13:56
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/16187
PPN: 515714100
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