某办公大楼的冰蓄冷及变风量空调设计

结合某办公大楼工程概况,介绍了该工程的冰蓄冷系统设计,讨论了变风量空调系统设计中的内外区划分、房间分隔、新风、噪声、末端装置选择等问题,并提出一些参考建议,从而确保办公楼空调设计的完备性和实用性。     

Use of visual CO2 feedback as a retrofit solution for improving classroom air quality

Carbon dioxide (CO₂) sensors that provide a visual indication were installed in classrooms during normal school operation. During 2‐week periods, teachers and students were instructed to open the windows in response to the visual CO₂ feedback in 1 week and open them, as they would normally do, without visual feedback, in the other week. In the heating season, two pairs of classrooms were monitored, one pair naturally and the other pair mechanically ventilated. In the cooling season, two pairs of naturally ventilated classrooms were monitored, one pair with split cooling in operation and the other pair with no cooling. Classrooms were matched by grade. Providing visual CO₂ feedback reduced CO₂ levels, as more windows were opened in this condition. This increased energy use for heating and reduced the cooling requirement in summertime. Split cooling reduced the frequency of window opening only when no visual CO₂ feedback was present.