To meet the challenge of mismatches between power supply and demand,modern buildings must schedule flexible energy loads in order to improve the efficiency of power grids.Furthermore,it is essential to understand the ...To meet the challenge of mismatches between power supply and demand,modern buildings must schedule flexible energy loads in order to improve the efficiency of power grids.Furthermore,it is essential to understand the effectiveness of flexibility management strategies under different climate conditions and extreme weather events.Using both typical and extreme weather data from cities in five major climate zones of China,this study investigates the energy flexibility potential of an office building under three short-term HVAC management strategies in the context of different climates.The results show that the peak load flexibility and overall energy performance of the three short-term strategies were affected by the surrounding climate conditions.The peak load reduction rate of the pre-cooling and zone temperature reset strategies declined linearly as outdoor temperature increased.Under extreme climate conditions,the daily peak-load time was found to be over two hours earlier than under typical conditions,and the intensive solar radiation found in the extreme conditions can weaken the correlation between peak load reduction and outdoor temperature,risking the ability of a building’s HVAC system to maintain a comfortable indoor environment.展开更多
选用活性炭纤维作为电极材料,混合床树脂为离子交换剂,搭建一种无膜电去离子装置,探究树脂层高度、再生电压、再生流量对其性能的影响,并对装置的能耗、稳定性及电极的选择进行分析。结果表明,活性炭纤维电极应用于无膜电去离子装置提...选用活性炭纤维作为电极材料,混合床树脂为离子交换剂,搭建一种无膜电去离子装置,探究树脂层高度、再生电压、再生流量对其性能的影响,并对装置的能耗、稳定性及电极的选择进行分析。结果表明,活性炭纤维电极应用于无膜电去离子装置提升了装置的吸附性能及再生性能,具有显著的优越性且电极性能稳定。无膜电去离子装置在树脂高度5 cm、再生电压250 V、再生体积流量45 m L/min的条件下运行较为适宜。550A-D113的混合离子交换树脂稳定性能良好,多个循环周期内未观察到树脂的颜色变化及阴阳树脂的分层现象,出水水质仍保持良好。经显微镜观察,虽长期使用后树脂表面形态有一定变化,但仍能满足装置运行使用需求。展开更多
基金National Key R&D Program of China of the 13th Five-Year Plan(No.2018YFD1100704)。
文摘To meet the challenge of mismatches between power supply and demand,modern buildings must schedule flexible energy loads in order to improve the efficiency of power grids.Furthermore,it is essential to understand the effectiveness of flexibility management strategies under different climate conditions and extreme weather events.Using both typical and extreme weather data from cities in five major climate zones of China,this study investigates the energy flexibility potential of an office building under three short-term HVAC management strategies in the context of different climates.The results show that the peak load flexibility and overall energy performance of the three short-term strategies were affected by the surrounding climate conditions.The peak load reduction rate of the pre-cooling and zone temperature reset strategies declined linearly as outdoor temperature increased.Under extreme climate conditions,the daily peak-load time was found to be over two hours earlier than under typical conditions,and the intensive solar radiation found in the extreme conditions can weaken the correlation between peak load reduction and outdoor temperature,risking the ability of a building’s HVAC system to maintain a comfortable indoor environment.
文摘选用活性炭纤维作为电极材料,混合床树脂为离子交换剂,搭建一种无膜电去离子装置,探究树脂层高度、再生电压、再生流量对其性能的影响,并对装置的能耗、稳定性及电极的选择进行分析。结果表明,活性炭纤维电极应用于无膜电去离子装置提升了装置的吸附性能及再生性能,具有显著的优越性且电极性能稳定。无膜电去离子装置在树脂高度5 cm、再生电压250 V、再生体积流量45 m L/min的条件下运行较为适宜。550A-D113的混合离子交换树脂稳定性能良好,多个循环周期内未观察到树脂的颜色变化及阴阳树脂的分层现象,出水水质仍保持良好。经显微镜观察,虽长期使用后树脂表面形态有一定变化,但仍能满足装置运行使用需求。
