Investigation of CRAH bypass for air-cooled data centers using computational fluid dynamics

Vahid Ebrahimpour, Hamza Salih Erden

Araştırma sonucu: ???type-name???Konferans katkısıbilirkişi

5 Atıf (Scopus)

Özet

Computer room air handling (CRAH) bypass (BP) method utilizes fan-equipped perforated tiles to force or induce room air through relatively lower flow resistance than that in CRAH units, as CRAH fans operate at lower speed. Increasing the BP airflow rate reduces the total fan power and increases the chiller power since the CRAH unit needs to provide colder air when a certain fraction of warm room air is allowed to mix with cold CRAH airflow. Simplified airflow network and thermodynamic modeling tools addressed this optimization problem and indicated cooling energy savings potential via CRAH BP method for enclosed aisle (EA) data centers. These tools assume uniform air temperature at the server inlets, even though recent experimental and computational studies indicate temperature non-uniformities at higher fractions of BP flow. This study addresses energy implications of the uniform temperature assumption of the reduced order modeling tools on the cooling energy saving potential of EA data centers by using computational fluid dynamics (CFD) modeling. Moreover, existing literature does not thoroughly investigate the application of CRAH BP in the open aisle (OA) data centers, which requires CFD models to resolve complex airflow patterns due to recirculation of hot air into the cold aisle and leakage of cold air into the hot aisle. This study utilizes CFD to investigate both induced and forced CRAH BP methods in a representative quadrant of a 1MW data center with and without aisle containment.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığı2018 IEEE International Telecommunications Energy Conference, INTELEC 2018 - Proceedings
YayınlayanInstitute of Electrical and Electronics Engineers Inc.
ISBN (Elektronik)9781538653708
DOI'lar
Yayın durumuYayınlandı - 2 Tem 2018
Etkinlik2018 IEEE International Telecommunications Energy Conference, INTELEC 2018 - Torino, Italy
Süre: 7 Eki 201811 Eki 2018

Yayın serisi

AdıINTELEC, International Telecommunications Energy Conference (Proceedings)
Hacim2018-October
ISSN (Basılı)0275-0473

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???event.eventtypes.event.conference???2018 IEEE International Telecommunications Energy Conference, INTELEC 2018
Ülke/BölgeItaly
ŞehirTorino
Periyot7/10/1811/10/18

Bibliyografik not

Publisher Copyright:
© 2018 IEEE.

Finansman

This research is supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK) through Award Number 118M238.

FinansörlerFinansör numarası
TÜBİTAK118M238
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

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