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## Energy and economic assessment of major free cooling retrofits for data centers in Turkey

#### OZAN GÖZCÜ [1] , HAMZA SALİH ERDEN [2]

Mechanical cooling is responsible for a significant fraction of the energy consumption of data centers (DCs). Free cooling systems take advantage of ambient conditions to reduce the need for compressor-based cooling. This study utilizes thermodynamic models of major free cooling systems such as the direct air-side economizer (ASE), indirect air-side economizer (IASE), indirect evaporative cooler (IEC), and indirect water-side economizer (WSE) integrated with the existing cooling infrastructure of a typical 1 MW IT load DC. Proposed models utilize hourly weather data of various cities in Turkey to compute annual energy consumption and cost-saving potentials of each free cooling method with respect to the baseline DC with both open aisle (OA) and enclosed aisle (EA). Results confirm the energy-saving potential by IEC leading to less than 10 % of annual chiller hours across Turkey and less than 1 % in half of the ten cities studied, especially in EA DCs. However, despite greater energy-saving potential, IEC has more extended payback periods of 1.5 to 3.7 years due to the high capital investment compared with those of ASE and WSE with less than 1.4 years.
Data centers, Turkey, free cooling, economizer, thermodynamic modeling, cooling infrastructure
Journal Section Articles Author: OZAN GÖZCÜ Author: HAMZA SALİH ERDEN Publication Date : June 1, 2019
 Bibtex @ { tbtkelektrik577572, journal = {Turkish Journal of Electrical Engineering and Computer Science}, issn = {1300-0632}, eissn = {1303-6203}, address = {}, publisher = {TUBITAK}, year = {2019}, volume = {27}, pages = {2097 - 2212}, doi = {}, title = {Energy and economic assessment of major free cooling retrofits for data centers in Turkey}, key = {cite}, author = {GÖZCÜ, OZAN and ERDEN, HAMZA SALİH} } APA GÖZCÜ, O , ERDEN, H . (2019). Energy and economic assessment of major free cooling retrofits for data centers in Turkey. Turkish Journal of Electrical Engineering and Computer Science , 27 (3) , 2097-2212 . Retrieved from https://dergipark.org.tr/en/pub/tbtkelektrik/issue/45742/577572 MLA GÖZCÜ, O , ERDEN, H . "Energy and economic assessment of major free cooling retrofits for data centers in Turkey". Turkish Journal of Electrical Engineering and Computer Science 27 (2019 ): 2097-2212 Chicago GÖZCÜ, O , ERDEN, H . "Energy and economic assessment of major free cooling retrofits for data centers in Turkey". Turkish Journal of Electrical Engineering and Computer Science 27 (2019 ): 2097-2212 RIS TY - JOUR T1 - Energy and economic assessment of major free cooling retrofits for data centers in Turkey AU - OZAN GÖZCÜ , HAMZA SALİH ERDEN Y1 - 2019 PY - 2019 N1 - DO - T2 - Turkish Journal of Electrical Engineering and Computer Science JF - Journal JO - JOR SP - 2097 EP - 2212 VL - 27 IS - 3 SN - 1300-0632-1303-6203 M3 - UR - Y2 - 2019 ER - EndNote %0 Turkish Journal of Electrical Engineering and Computer Science Energy and economic assessment of major free cooling retrofits for data centers in Turkey %A OZAN GÖZCÜ , HAMZA SALİH ERDEN %T Energy and economic assessment of major free cooling retrofits for data centers in Turkey %D 2019 %J Turkish Journal of Electrical Engineering and Computer Science %P 1300-0632-1303-6203 %V 27 %N 3 %R %U ISNAD GÖZCÜ, OZAN , ERDEN, HAMZA SALİH . "Energy and economic assessment of major free cooling retrofits for data centers in Turkey". Turkish Journal of Electrical Engineering and Computer Science 27 / 3 (June 2019): 2097-2212 . AMA GÖZCÜ O , ERDEN H . Energy and economic assessment of major free cooling retrofits for data centers in Turkey. Turkish Journal of Electrical Engineering and Computer Science. 2019; 27(3): 2097-2212. Vancouver GÖZCÜ O , ERDEN H . Energy and economic assessment of major free cooling retrofits for data centers in Turkey. Turkish Journal of Electrical Engineering and Computer Science. 2019; 27(3): 2212-2097.