天津地区某高层办公楼能耗模拟与节能潜力分析

建筑能耗中供暖空调能耗所占比例约为55%,是实现建筑节能的关键。采用DeST-c模拟了天津地区某新建高层(20层)办公楼能耗,将模拟结果与传统负荷计算结果进行了对比,同时分析了空调系统的风系统和水系统分别采用排风热回收和变流量技术后的节能潜力。对比分析表明与传统负荷计算方法相比,能耗模拟软件计算的全年累计冷热负荷值分别减少43.0%和31.0%,全年累计冷热负荷指标仅为传统负荷计算值的21.0%和26.0%。风系统采用排风热回收技术后,冷水机组总容量从1 800 kW降到为1 500 kW,全年制冷能耗节省5.3万kW·h;水系统采用变流量水系统技术后,理论上每年节省2.5万kW·h能耗。采用排风热回收和变流量两项节能措施后,空调系统总能耗降低约8%,节能效果明显。

Energy Consumption Simulation and Energy-Saving Potential Analysis for a High-Rise Office Building in Tianjin

The heating and air conditioning energy consumption is the key to building energy efficiency as accounts for 50％ to 60％ of building energy consumption.This paper presents a numerical energy consumption for new high-rise (20-story) office building in Tianjin with DeST-c, and the simulation results are compared with the traditional load calculation results.At the same time, the energy-saving potential analysis of air-conditioning system after using the heat recovery air system and variable flow water system is given.Compared with traditional load calculation results, the total energy consumption of simulation result reduced by 43.0％ and 31.0％, and heating and cooling load indicator reduced by 26.0％ and 21.0％ respectively.The total capacity of chillers reduced from 1800kW to 1500kW after using heat recovery technology and related energy saving for chillers is about 53 thousand kW·h per year.After using variable flow water system, about 25 thousand kW·h energy for water pump was saved per year.Total energy consumption of air-conditioning system reduced by 8.0％ after using the heat recovery air system and variable flow water system, therefore the energy saving effect is obvious.