In recent years, with the rapid development of IT industry, the energy consumption of air conditioning system in telecommunication base stations has increased dramatically. Compared with the traditional vapor compression air conditioning system, the free cooling technology has advantages in relative smaller electricity consumption and remarkable energy-saving. In this paper, the feasibility of using free cooling unit instead of traditional vapor compression air conditioning systems for room cooling in one of base stations is analyzed in Jinan. The results show that, in the testing period, under the condition of automatic temperature control at 4oC, the average EER of the cooling unit can reach about 12.78; with ambient temperature decreasing, the indoor and outdoor temperature difference, cooling unit power output and stage average EER are increased. In addition, through the test data regression, a fitting correlation between the cooling unit power output, indoor and outdoor temperature difference and ambient temperature is also given. The experimental results show the free cooling technology is worthy of promotion in the field of base station energy saving.
NIU Lin
,
WANG Xian-long
,
LI Hua-shan
,
LIAN Yong-wang
,
BU Xian-Biao
,
WANG Ling-Bao
,
TAO Shou-song
. Experiment Study on Free Cooling System with Temperature Decreasing of Communication Base Station in Jinan[J]. Advances in New and Renewable Energy, 2017
, 5(6)
: 484
-488
.
DOI: 10.3969/j.issn.2095-560X.2017.06.011
[1] EBRAHIMI K, JONES G F, FLEISCHER A S. A review of data center cooling technology, operating conditions and the corresponding low-grade waste heat recovery opportunities[J]. Renewable and sustainable energy reviews, 2014, 31: 622-638. DOI: 10.1016/j.rser.2013. 12.007.
[2] C114中国通信网. 中国前9月新增基站68万座 总数已达407.7万[DB/OL]. (2015-10-22). http://tech.hexun.com/2015-10-22/180027874.html.
[3] 钱存存. 华南地区办公建筑IDC机房空调系统优化设计与节能改造方法研究[D]. 重庆: 重庆大学, 2015: 1-6.
[4] ORÓ E, DEPOORTER V, PFLUGRADT N, et al. Overview of direct air free cooling and thermal energy storage potential energy savings in data centres[J]. Applied thermal engineering, 2015, 85: 100-110. DOI: 10.1016/j.applthermaleng.2015.03.001.
[5] ZHANG H N, SHAO S Q, XU H B, et al. Free cooling of data centers: A review[J]. Renewable and sustainable energy reviews, 2014, 35: 171-182. DOI: 10.1016/j.rser.2014.04.017.
[6] NI J C, BAI X L. A review of air conditioning energy performance in data centers[J]. Renewable and sustainable energy reviews, 2017, 67: 625-640. DOI: 10.1016/j.rser.2016.09.050.
[7] GAO T Y, DAVID M, GEER J, et al. Experimental and numerical dynamic investigation of an energy efficient liquid cooled chiller-less data center test facility[J]. Energy and buildings, 2015, 91: 83-96. DOI: 10.1016/ j.enbuild.2015.01.028.
[8] KIM M H, HAM S W, PARK J S, et al. Impact of integrated hot water cooling and desiccant-assisted evaporative cooling systems on energy savings in a data center[J]. Energy, 2014, 78: 384-396. DOI: 10.1016/j. energy.2014.10.023.
[9] FAKHIM B, BEHNIA M, ARMFIELD S W, et al. Cooling solutions in an operational data centre: A case study[J]. Applied thermal engineering, 2011, 31(14/15): 2279-2291. DOI: 10.1016/j.applthermaleng.2011.03.025.
[10] HASSAN S F, ALI M, SAJID A, et al. Free cooling investigation of SEECS data center[J]. Energy procedia, 2015, 75: 1406-1412. DOI: 10.1016/j.egypro.2015.07.233.
[11] MALKÄMAKI T, OVASKA S J. Solar energy and free cooling potential in European data centers[J]. Procedia computer science, 2012, 10: 1004-1009. DOI: 10.1016/j.procs.2012.06.138.
[12] 梁利霞, 刘月琴. 数据中心制冷方案比较分析[J]. 发电与空调, 2012, 33(5): 83-87. DOI: 10.3969/J.ISSN. 2095-3429.2012.05.024.
[13] 马松. 利用自然冷源实现机房物理降温[J]. 通信电源技术, 2014, 33(S): 52-54. DOI: 10.3969/j.issn.1009-3664. 2014.z1.018.
[14] 吕继祥, 王铁军, 赵丽, 等. 基于自然冷却技术应用的数据中心空调节能分析[J]. 制冷学报, 2016, 37(3): 113-118. DOI: 10.3969/j.issn.0253-4339.2016.03.113.
[15] 佛兰克 P. 英克鲁佩勒, 大卫 P. 德维特, 狄奥多尔 L. 伯格曼, 等. 传热和传质基本原理: 第6版[M]. 葛新石, 叶宏, 译. 北京: 化学工业出版社, 2007: 408-442.
