数据中心综合能源系统配置与运行的集成优化

采用清洁高效、环保节能的综合能源系统替代传统供能系统,是实现数据中心绿色可持续发展的有效措施。综合能源系统的设计与运行优化通常被分割成两个阶段进行考虑,而并未实现系统的最优规划。本文基于数据中心全年能耗特点,设计了一种以天然气、太阳能及地热能为能源,集成有机朗肯循环发电系统、吸收式制冷机组、换热器等余热利用设备的综合能源系统。以投资成本、运行成本、碳税成本及太阳能丢弃惩罚成本等在内的综合成本为优化目标,建立了综合能源系统混合整数线性规划模型,对各设备容量以及调度策略进行了集成优化。以某小型数据中心为例进行了案例研究,结果显示：与传统供能方式相比,所构建的综合能源系统费用年值节约率为35.72%,二氧化碳减排率为55.11%,一次能源节约率为39.86%。

Integrated Optimization of Configurations and Operations of Integrated Energy System for Data Center

Adopting the energy-efficient, clean and environmental friendly integrated energy system (IES) in data center to replace conventional separate production system is one of effective alternatives to realize the green and sustainable development of data center. The system configurations and operations of IES are respectively optimized in the traditional methods. According to the characteristics of energy consumption of data center, an IES driven by natural gas, solar energy and geothermal energy is proposed and it integrates organic Rankine cycle power generation, absorption chiller, heat exchangers to improve utilization rate of waste heat. A mixed-integer linear programming model of the IES is developed to optimize the capacities of components and the energy dispatch strategies. The IES comprehensive cost including investment cost, operation cost, carbon tax cost and penalty cost of solar curtailment, is minimized. A case study in small-scale data center is studied, and the results demonstrates that the optimized IES achieves the annual total cost saving rate of 25.72%, carbon dioxide emission reduction rate of 55.11%, and primary energy saving rate of 39.86%.