Recently, Baidu released the "2017-2018 Baidu Corporate Social Responsibility Report", which expounds Baidu's practice and thinking in fulfilling social responsibility in the past two years. Among them, Baidu has achieved remarkable results in energy conservation and environmental protection with its leading technology, which is worthy of reference for the industry. The report mentioned that Baidu has achieved significant energy conservation and emission reduction in self-built buildings, green travel, and construction of green data centers. In 2018, only through the introduction of clean energy, the annual CO2 emission reduction has reached 78,000. Baidu is the green pioneer and leader of China's data centers. It improves power supply efficiency and reduces carbon emissions through measures such as breaking through the traditional structure of electrical systems, deploying the first domestic cabinet servers with built-in lithium batteries, and introducing clean energy.

Data center energy efficiency leads the world, saving 220 million kWh of electricity every year

Energy conservation and emission reduction is not only an urgent task for traditional industries, but also data centers that support emerging industries such as artificial intelligence and cloud computing. According to statistics, as an important infrastructure for the high-tech industry, the power consumption of global data centers accounts for 1.1% to 1.5% of the total global power consumption, which produces a large amount of greenhouse gas emissions, posing huge challenges to resources and the environment. At present, the power usage efficiency (PUE) of data centers in my country is generally high, and there is still a big gap between data centers in the United States.

As a leader in AI and cloud computing in China, Baidu holds more than 400 domestic and foreign technology innovation patents in the field of data centers, and is a green pioneer and leader in data centers in China. Data center, Baidu has been adhering to the concept of green data center, aiming at saving energy and reducing consumption, practice the "data center as a whole, energy saving starting from the source", from the software architecture, IT equipment and infrastructure (electrical systems and the hvac system) a number of green energy-saving technology application innovation, and the AI technology is introduced into data center, intelligent decision-making, intelligent heat dissipation, Significantly save energy and reduce consumption.

According to the just-released 2017-2018 Baidu Corporate Social Responsibility Report, Baidu's cloud computing data center had an average annual PUE of 1.09 in 2018, ranking first in China. According to the Data Center Survey Report 2018 released by Uptime Institute, the PUE of global data centers in 2018 was 1.58. Baidu's performance in data center energy efficiency is well above the international average. In September 2018, the fourth phase of Yangquan Data Center will be put into production, which is expected to reduce power consumption by 220 million KWH and CO2 emissions by 203,000 tons per year. In addition, Baidu also actively introduced clean energy. From 2016 to 2018, it applied for and signed contracts with 81 million KWH of clean energy such as wind power, and reduced 78,000 tons of annual CO2 emissions, equivalent to the annual CO2 absorption of 1.67 million trees.Self-built building ice storage "peak cutting and valley filling" saves 4 million KWH of electricity

In addition to achieving energy conservation and emission reduction in data centers, Baidu's self-built buildings are also benchmarking measures for energy conservation and environmental protection. It is understood that Baidu self-built buildings are using ice storage technology. Each cooling season, through the power load trough the preparation of cold at night in the daytime power during the peak load in preparation for central air conditioning system cooling capacity and cooling, reduce the power peak load of power grid, which can effectively reduce power grid peak valley difference, realizes the power peak "cut", improve the load rate of power grid, and saving the enterprise's actual consumption spending. Through "peak cutting and grain filling", Baidu can save about 4 million kilowatt hours of electricity a year.

Baidu Building also uses the fresh air system to recover part of the cold and heat, to achieve energy-saving effect. The cooling capacity in the fresh air system is recovered in the refrigeration season, saving the electricity consumption of refrigeration by 1.8 million degrees. During the heating season, the heat in the fresh air system is recovered, saving 150,000 cubic meters of natural gas for heating. In addition, Baidu office area a large number of LED energy-saving lamps, compared with ordinary fluorescent lamp, a year to save electricity about 580,000 degrees; Baidu solar collector heat exchange area of 1,178 square meters, provide domestic hot water throughout the year; The second stage of Baidu Science and Technology Park has 3 rainwater collection tanks, and the annual rainwater reuse is about 2400m.

As the world's largest Chinese search engine and AI leader, Baidu takes social responsibility as an important dimension in its development with the mission of "making the complex world simpler with technology". Through energy conservation and environmental protection efforts and actions at the level of self-built buildings, green travel and data centers, Baidu explores ways to improve energy efficiency and protect the environment with leading technologies. Its technology and experience in green data center construction and self-built environmentally friendly buildings are worthy of reference for more enterprises. In addition to releasing the report, Baidu also added a feedback platform on its CSR website to accept users' suggestions on CSR in order to improve and enrich relevant practices.

近日，百度发布《2017-2018百度企业社会责任报告》，报告中阐述了过去两年百度在履行社会责任方面的实践和思考，其中百度凭借领先技术在节能环保方面成效卓著，值得业界借鉴。报告提到，百度已在自建楼宇、绿色出行、建设绿色数据中心等方面实现大幅节能减排，在2018年仅通过引入清洁能源，全年CO2减排就已达到7.8万。百度是中国数据中心绿色开创者和引领者，通过电气系统突破传统架构、部署国内首批内置锂电池的整机柜服务器、引入清洁能源能等措施，提高供电效率、减少碳排放。

数据中心能源使用效率领先国际 每年省电2.2亿度

节能减排，不仅是传统产业的紧迫任务，支撑人工智能、云计算等新兴产业的数据中心同样面临这一问题。据统计，作为高科技产业重要基础设施，全球数据中心的耗电量占了全球总耗电量的1.1%~1.5%，产生了大量的温室气体排放，给资源和环境带来巨大挑战。目前我国数据中心的能源使用效率（Power Usage Effectiveness，PUE）普遍较高，与美国数据中心仍有较大差距。

作为中国AI和云计算的领先者，百度在数据中心领域拥有400余项国内外技术创新专利，是中国数据中心绿色开创者和引领者。据悉，百度数据中心一直秉承绿色数据中心理念，以节能降耗为目标，实践了“数据中心是一个整体，节能从源头开始”，从软件架构、IT设备和基础设施（电气系统和暖通系统）方面创新应用多项绿色节能技术，并将AI技术引入数据中心，实现智能决策、智能散热，大幅节能降耗。

刚刚发布的《2017-2018百度企业社会责任报告》显示，百度的云计算数据中心2018年单模组年均PUE达到1.09，位居国内第一。据Uptime Institute发布的《2018数据中心调查报告》，2018年全球数据中心PUE为1.58。百度在数据中心能源使用效率上的成绩远超国际均值。2018年9月阳泉数据中心全部四期投产，预计每年减少电能消耗2.2亿度，减少CO2排放20.3万吨。此外，百度还积极引入清洁能源，2016-2018年累计申报并签约风能等清洁能源8100万度，全年CO2减排7.8万吨，相当于167万棵树一年的CO2吸收量。

自建楼宇冰蓄冷“削峰填谷” 节省电量400万度

除了数据中心实现节能减排，百度的自建楼宇也堪称企业节能环保的标杆举措。据了解，百度自建楼宇均采用冰蓄冷技术。每个制冷季，通过在夜间电力负荷低谷期制备冷量，在白天电力负荷高峰期间用制备的冷量为中央空调系统供冷，减少用电高峰期的电网负荷，可有效的减少电网峰谷差异，实现电力的“削峰填谷”，提高电网的负荷率，并有效节约了企业的实际用电支出。通过“削峰填谷”，百度全年可节省约400万度电量。

百度大厦还通过新风系统中回收部分的冷量和热量，实现节能效果。制冷季回收新风系统中的冷量，节约制冷用电量180万度；供暖季回收新风系统中的热量，节约制热用的天然气量15万立方米；此外，百度办公区大量采用LED节能灯具，相比普通日光灯，一年节约电量约58万度；百度太阳能集热器换热面积共1178平米，全年提供生活热水；百度科技园二期建有雨水收集池3个，全年雨水再利用2400m左右。