夏热冬冷地区办公建筑降低供暖空调能耗的技术路径

Technical route to reduce energy consumption of heating and air conditioning of office buildings in hot summer and cold winter zone

以上海地区某办公建筑为例,基于EnergyPlus能耗模拟,探讨了围护结构性能提升和暖通空调系统优化这2条节能技术路径对夏热冬冷地区办公建筑降低供暖空调全年能耗的有效性。结果表明:围护结构性能提升的节能潜力较小,经济性较差;单纯提高围护结构保温隔热性能并不能保证降低建筑年耗冷量,应综合分析全年供热供冷能耗确定围护结构优化设计参数。暖通空调系统优化的节能潜力较大,经济性较好;与基准方案相比,利用自然冷源降温和行为节能2项技术措施后全年耗冷量、耗热量可分别降低34.59%和23.43%,年供热供冷费可降低29.78%。

Taking an office building in Shanghai as an example,based on energy consumption simulation by EnergyPlus software,the two energy saving technical routes of improving the envelope performance and optimizing the HVAC system are discussed about the effect on reducing the annual energy consumption of heating and air conditioning for office buildings in hot summer and cold winter zone.The results show that the energy saving potential of the performance improvement of the envelope is small,and the economy is poor.Simply improving the heat insulation performance of the envelope does not guarantee the reduction of the annual cooling consumption of the building.A comprehensive analysis of the annual heating and cooling energy consumption should be done to determine the optimal design parameters of the envelope.HVAC system optimization has great energy saving potential and good economy.Compared with the baseline scheme,the annual cooling and heating consumption can be reduced by 34.59% and 23.43%,and the annual cost of heating and cooling can be reduced by 29.78% after using the two technical measures of natural cold source cooling and behavioral energy saving.