多冷源冷却系统结合光伏与余热回收在数据中心的性能研究

Abstract The establishment of multi-energy cooperative integrated energy system can help data centers achieve sustainable development. This paper proposes a hybrid energy system for data centers, which includes three subsystems: the multi-cooling sources (water-side economizers and ground water) cooling system, the Building Integrated Photovoltaics system (BIPVS) and the waste heat recovery system. Through the coupling of heat and electricity in these subsystems, the proposed hybrid energy system can operate efficiently and low-carbon. A simulation analysis is conducted at a case data center in Nanchang to evaluate the system’s performance in cooling, heating, overall energy efficiency, and economy, by comparing the hybrid energy system with the existing system and isolated energy system. The results indicate that the Coefficient of Performance (COP) of the chiller in hybrid system increases by 0.4 to 2.55 compared to isolated energy system, while the COP of the heat pump increases by 1.4 to 2.1 during heating season. Compared to existing system and isolated system, the hybrid energy system demonstrates potential energy savings of 72.98 % and 21.3 %, respectively, and reduces carbon emissions by 68.34 % and 19.52 %. The dynamic payback period for hybrid energy system is 2.87 years compared to existing system, and 3.54 years compared to isolated system.