Article(id=1239230400338391091, tenantId=1146029695717560320, journalId=1238823019242635269, issueId=1239230393547804821, articleNumber=null, orderNo=null, doi=10.12465/j.issn.0253-4339.2025.03.113, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1726675200000, receivedDateStr=2024-09-19, revisedDate=1733760000000, revisedDateStr=2024-12-10, acceptedDate=1733846400000, acceptedDateStr=2024-12-11, onlineDate=1773385151226, onlineDateStr=2026-03-13, pubDate=1750003200000, pubDateStr=2025-06-16, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773385151226, onlineIssueDateStr=2026-03-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773385151226, creator=13701087609, updateTime=1773385151226, updator=13701087609, issue=Issue{id=1239230393547804821, tenantId=1146029695717560320, journalId=1238823019242635269, year='2025', volume='46', issue='3', pageStart='1', pageEnd='166', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773385149609, creator=13701087609, updateTime=1773385254705, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1239230834402717933, tenantId=1146029695717560320, journalId=1238823019242635269, issueId=1239230393547804821, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1239230834402717934, tenantId=1146029695717560320, journalId=1238823019242635269, issueId=1239230393547804821, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=113, endPage=122, ext={EN=ArticleExt(id=1239230400548106304, articleId=1239230400338391091, tenantId=1146029695717560320, journalId=1238823019242635269, language=EN, title=Cooling System for Data Centers Based on the Air-Water-Air Principle with Increased Temperature Differential, columnId=null, journalTitle=Journal of Refrigeration, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Improving the energy efficiency of data centers by conserving energy in cooling systems is a priority strategy. In this study, thermal analysis of the prevailing air-water-air cooling system revealed inefficiencies caused by a significant discrepancy in the flow rate between the air and water sides of the server room air conditioning system. To mitigate such discrepancy, a new system architecture with a high-temperature differential on the waterside was proposed. Compared with a conventional system with a small temperature differential, the proposed high-temperature differential cooling system substantially augmented the proportion of natural cooling throughout the year, reduced the energy consumption of pumping fluids, and reduced the total energy consumption of the cooling system by approximately 20%-30%. Although the introduction of a high-temperature differential cooling system requires an increase in the heat exchange area and an increase in the cost of air conditioning for the server room, it concurrently reduces the investment in cooling towers, chillers, circulating pumps, chilled water storage tanks, pipelines, and valves, ultimately reducing the total investment in the cooling system by 15%-25%. Furthermore, the high-temperature differential cooling system facilitates operational adjustments, decouples control from external temperature variations and IT load changes, and minimizes maintenance requirements.
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Xie Xiaoyun, female, associate professor, Building Energy Research Center, Tsinghua University, 86-10-62793591, E-mail:
xiexiaoyun@tsinghua.edu.cn. Research fields: absorption heat pump, evaporative cooling technology, thermal principles.
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数据中心冷却系统节能是提高数据中心能效的主要方式。通过对常见的风-水-风冷却系统进行热学分析,发现机房空调的风侧与水侧存在极大的流量不匹配损失,因此提出水侧大温差系统形式。相比于小温差方案,大温差冷却系统可大幅增加全年自然冷却比例,降低输配能耗,冷却系统总能耗可减少约20%~30%。水侧大温差方案会增加机房空调的传热面积和成本,但冷却塔、制冷机、循环水泵、蓄冷罐、管路和阀门的投资均会降低,冷却系统总投资能够降低15%~25%。大温差冷却系统可以简化运行调节,全年无需调节阀门,使室外温度变化和IT负载变化调控方式解耦,减少运维工作量。
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2012.), articleTitle=Research on cooling technology for high yield thermal density data room, refAbstract=null)], funds=[Fund(id=1239230427194519686, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, awardId=2022YFC3802403, language=EN, fundingSource=National Key R&D Prgram of China(2022YFC3802403), fundOrder=null, country=null), Fund(id=1239230427265822856, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, awardId=2022YFC3802403, language=CN, fundingSource=国家重点研发计划(2022YFC3802403), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1239230420827567069, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, xref=null, ext=[AuthorCompanyExt(id=1239230420835955677, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, companyId=1239230420827567069, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Building Energy Research Center, Tsinghua University, Beijing, 100084, China), AuthorCompanyExt(id=1239230420840149982, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, companyId=1239230420827567069, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=清华大学建筑节能研究中心 北京 100084)])], figs=[ArticleFig(id=1239230424015237180, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.1, caption=
Principle of air-water-air cooling system, figureFileSmall=hKEpu1DfgwesjXvVUlvkAw==, figureFileBig=V/Etq5RE1cgCe79MDH2SBQ==, tableContent=null), ArticleFig(id=1239230424120094785, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图1, caption=
风-水-风冷却系统原理E蒸发器;C冷凝器;P板式换热器。
, figureFileSmall=hKEpu1DfgwesjXvVUlvkAw==, figureFileBig=V/Etq5RE1cgCe79MDH2SBQ==, tableContent=null), ArticleFig(id=1239230424338198606, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.2, caption=
Heat transfer process and T-Q diagram of counterflow heat exchanger, figureFileSmall=ayLG/XHvSUBHUygc6bK90g==, figureFileBig=fX2eGwaqHe3nemG3tsW6Dw==, tableContent=null), ArticleFig(id=1239230424480804945, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图2, caption=
逆流换热器换热过程和T-Q图, figureFileSmall=ayLG/XHvSUBHUygc6bK90g==, figureFileBig=fX2eGwaqHe3nemG3tsW6Dw==, tableContent=null), ArticleFig(id=1239230424581468244, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.3, caption=
T-Q diagram of the hot and cold mixing process, figureFileSmall=xHgTuTjsISgysD96bv/CCg==, figureFileBig=5FYQ09HeymjbYXBLg/jFeA==, tableContent=null), ArticleFig(id=1239230424686325849, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图3, caption=
冷热掺混过程T-Q图, figureFileSmall=xHgTuTjsISgysD96bv/CCg==, figureFileBig=5FYQ09HeymjbYXBLg/jFeA==, tableContent=null), ArticleFig(id=1239230424786989148, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.4, caption=
T-Q diagram of cooling systems with small and large temperature differences, figureFileSmall=rGd0p7NYmq8JOfut8SkyWA==, figureFileBig=+buWss/kzyvxiELtnXyKGw==, tableContent=null), ArticleFig(id=1239230424875069534, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图4, caption=
小温差和大温差冷却系统T-Q图Q1自然冷却冷量;Q2机械制冷量;W制冷机功耗。
, figureFileSmall=rGd0p7NYmq8JOfut8SkyWA==, figureFileBig=+buWss/kzyvxiELtnXyKGw==, tableContent=null), ArticleFig(id=1239230424958955620, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.5, caption=
T-Q diagram of heat transfer process between cooling water and chilled water during hybrid cooling mode, figureFileSmall=AmfXKnhrPhF59UHWbsYH1Q==, figureFileBig=kux3SSeJvLattjeciZN8Cw==, tableContent=null), ArticleFig(id=1239230425030258789, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图5, caption=
过渡季时冷却水和冷冻水换热T-Q图, figureFileSmall=AmfXKnhrPhF59UHWbsYH1Q==, figureFileBig=kux3SSeJvLattjeciZN8Cw==, tableContent=null), ArticleFig(id=1239230425122533481, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.6, caption=
Variation of entransy loss with the number of stages of chillers, figureFileSmall=0d33i08zS23D86y8SuG75g==, figureFileBig=wOmYMgRxkg+KuFvvKiGPmw==, tableContent=null), ArticleFig(id=1239230425189642349, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图6, caption=
制冷机
耗散随制冷机级数的变化, figureFileSmall=0d33i08zS23D86y8SuG75g==, figureFileBig=wOmYMgRxkg+KuFvvKiGPmw==, tableContent=null), ArticleFig(id=1239230425269334129, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.7, caption=
Principle for two types of multi-stage chillers in series, figureFileSmall=wSMPMfbXLUTUPb2vyLbVQg==, figureFileBig=/8SjNJe4hlHsokenWR39hg==, tableContent=null), ArticleFig(id=1239230425336442997, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图7, caption=
多级制冷机串联形式原理E蒸发器;C冷凝器;P板式换热器。
, figureFileSmall=wSMPMfbXLUTUPb2vyLbVQg==, figureFileBig=/8SjNJe4hlHsokenWR39hg==, tableContent=null), ArticleFig(id=1239230425411940471, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Fig.8, caption=
Investment distribution of equipment in cooling systems, figureFileSmall=5mPTSG6qp2N6jgc7M/pvmg==, figureFileBig=ct27TCUF4QygY/POQY7bGg==, tableContent=null), ArticleFig(id=1239230425483243642, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=图8, caption=
冷却系统各部分设备的投资分布, figureFileSmall=5mPTSG6qp2N6jgc7M/pvmg==, figureFileBig=ct27TCUF4QygY/POQY7bGg==, tableContent=null), ArticleFig(id=1239230425562935423, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=EN, label=Tab.1, caption=
Comparison of cooling performance between large and small temperature difference, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 冷冻水供、回水温度/℃ | 城市 | PUE因子 | CLF | 全年自然冷却比例 | 最热时机械制冷比例 | 大温差与小温差方案初投资之比 |
|---|
| 空调 | 冷却水泵 | 冷冻水泵 | 冷却塔 | 制冷机 |
|---|
| 小温差 | 20、26 | 上海 | 0.055 67 | 0.019 28 | 0.018 51 | 0.012 92 | 0.027 13 | 0.133 51 | 70.6% | 100% | — |
| 北京 | 0.05567 | 0.018 98 | 0.018 51 | 0.010 25 | 0.012 45 | 86 0.115 | 85.16% | 100% | — |
| 灵丘 | 0.055 67 | 0.018 82 | 0.018 51 | 0.008 20 | 0.001 80 | 0.103 00 | 97.38% | 87.35% | — |
| 大温差 | 20、32 | 上海 | 0.055 67 | 0.009 44 | 0.009 26 | 0.00676 | 0.015 13 | 26 0.096 | 84.39% | 83.97% | 86.51% |
| 北京 | 0.055 67 | 0.009 38 | 0.009 26 | 0.005 77 | 0.006 89 | 0.086 90 | 92.75% | 77.76% | 85.31% |
| 灵丘 | 0.055 67 | 0.009 33 | 0.00926 | 0.004 47 | 0.000 63 | 0.079 34 | 99.31% | 39.1% | 77.87% |
), ArticleFig(id=1239230427043524738, tenantId=1146029695717560320, journalId=1238823019242635269, articleId=1239230400338391091, language=CN, label=表1, caption=
大温差方案与小温差方案冷却性能对比, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 冷冻水供、回水温度/℃ | 城市 | PUE因子 | CLF | 全年自然冷却比例 | 最热时机械制冷比例 | 大温差与小温差方案初投资之比 |
|---|
| 空调 | 冷却水泵 | 冷冻水泵 | 冷却塔 | 制冷机 |
|---|
| 小温差 | 20、26 | 上海 | 0.055 67 | 0.019 28 | 0.018 51 | 0.012 92 | 0.027 13 | 0.133 51 | 70.6% | 100% | — |
| 北京 | 0.05567 | 0.018 98 | 0.018 51 | 0.010 25 | 0.012 45 | 86 0.115 | 85.16% | 100% | — |
| 灵丘 | 0.055 67 | 0.018 82 | 0.018 51 | 0.008 20 | 0.001 80 | 0.103 00 | 97.38% | 87.35% | — |
| 大温差 | 20、32 | 上海 | 0.055 67 | 0.009 44 | 0.009 26 | 0.00676 | 0.015 13 | 26 0.096 | 84.39% | 83.97% | 86.51% |
| 北京 | 0.055 67 | 0.009 38 | 0.009 26 | 0.005 77 | 0.006 89 | 0.086 90 | 92.75% | 77.76% | 85.31% |
| 灵丘 | 0.055 67 | 0.009 33 | 0.00926 | 0.004 47 | 0.000 63 | 0.079 34 | 99.31% | 39.1% | 77.87% |
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