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A rotary booster driven free-cooling unit using ambient cold was proposed for small and medium sized data center free cooling. The influences of heat exchanging area, refrigerant charging quality and condenser fan frequency on cooling capacity, rotary booster power and energy efficiency ratio (EER) were studied experimentally under different working conditions. Results indicated both the cooling capacity and EER increase with the refrigerant charging quality. With the increase of indoor and outdoor temperature difference ?t, the rotary booster power reduced to about 0.6 kW while the temperature difference was 25?. And the EER was improved by appropriately reducing the frequency of the condenser fan. When the refrigerant charging quality was 5 kg and condenser fan frequency was 30Hz, the cooling capacity of free-cooling unit with dual heat exchangers was 20.2 kW and the EER was 18.4 when the indoor and outdoor temperature difference was 25?.
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Détails
- Titre original : Thermal performance of a rotary booster driven free-cooling unit for data center.
- Identifiant de la fiche : 30026008
- Langues : Anglais
- Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Date d'édition : 24/08/2019
- DOI : http://dx.doi.org/10.18462/iir.icr.2019.0594
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