智能百叶对照明与空调能耗影响的研究

Influence of Automated Venetians on Lighting and Air-Conditioning Energy Consumption

本文以北京市某高校1间教室的1扇南向外窗的智能百叶为研究对象,采用现场测试与模拟计算的方法,针对晴天与多云天2种典型天气状况,在分析百叶倾角与室内得热量、室内照度的关系的基础上,研究智能百叶的调节对照明与空调能耗的影响。测试结果表明:1)当测试房间有直射光线进入时,室内得热量增加很明显;2)当测试房间无阳光直射进入时,室内得热量随百叶角度的减小而减少;3)进深1 m处直射光对照度的影响较大,但直射光对进深2 m以外的照度影响较小;4)有直射光时,照度在进深方向上的分布很不均匀,而没有直射光时,照度分布较均匀;5)没有直射光的时候,某些角度下照度也能满足要求。模拟计算结果表明:合理调节智能百叶后,多云天时节能率最高可达57.7%,晴天时节能率最高可达63.5%。百叶倾角为120°时,空调能耗与照明能耗之和相对于百叶全开时低60%。

This paper has studied one classroom＇s south window with automobile blinds in a university located in Beijing.Field measurement and simulation calculation have been applied and two typical weather conditions,which is sunny and cloudy day are considered.The measurement results are showed below：1） The indoor solar heat gain is increased significantly when existing direct solar radiation penetration.2） The indoor solar heat gain decreased along with the slat angle decreased when direct solar radiation do not enter the testing room.3） The direct sunlight has more influence on illuminance at 1 m depth while has less influence on illuminance at 2m depth away.4） The distribution of indoor illuminance is nonuniform when direct sunlight enters the room,and the penetrated diffuse solar radiation contributes to the uniform distribution of indoor illuminance.5） The illuminance requirement can be met with blinds set in some slat angle.The simulation calculation result shows that the maximum overall energy savings in cloudy day and sunny day are 57.7％ and 63.5％ respectively as the blinds are properly adjusted.The overall energy consumptions of cooling and lighting under the venetian slat angle of 120°can be reduced by about 60％ comparing with the fully opened blind case.