楼宇内小型数据中心余热回收供暖系统的节能研究
Energy saving research of waste heat recovery heating system forsmall data centers in buildings
摘要：
以存在小型数据中心的典型办公建筑为例,提出了楼宇内小型数据中心余热回收用于所在建筑其他区域供暖的系统。采用TRNSYS进行建模并计算了该系统在整个供暖期的能耗,将其与传统数据中心直膨式空调供冷、燃气锅炉供热的基准系统的能耗、碳排放量和运行费用进行了对比。模拟计算结果表明:余热回收系统采用最大蓄热罐时,相比于基准系统在整个供暖季的节能率约为49.02%,减少CO2排放约29.70%,投资回收期约为4.45 a;若系统中蓄热罐体积减小,需增加辅助热源,该情况下节能率和减碳率分别至少可达32.53%和19.57%,投资回收期最短可至2.79 a。
Abstract：
Taking a typical office building with a small data center as an example, this study proposes a system that utilizes waste heat recovered from the building’s small data center to provide heating for other zones. A TRNSYS model is established to calculate the system’s energy consumption during the entire heating season. The proposed system is compared with a baseline system using direct-expansion air conditioning for data center cooling and gas-fired boilers for heating in terms of energy consumption, carbon emissions, and operational costs. Simulation results show that when using a maximum heat storage tank, the waste heat recovery system achieves approximately 49.02% energy saving, 29.70% CO2 emission reduction, and a payback period of about 4.45 years compared with the baseline system. When reducing heat storage tank volume, an auxiliary heat source needs to be added, in which case the energy saving rate and carbon reduction rate can reach at least 32.53% and 19.57%, respectively, and the investment payback period can be as short as 2.79 years.
Keywords:data center; office building; waste heat recovery; heating; heat pump; energy saving; carbon reduction