CAJ | 학술논문

不同天气(晴天和阴天)和开窗比例条件下,对屋顶全开启型 Venlo 式温室(温室 A)白天室内、外光合有效辐射量子通量密度(PAR)进行测试。以屋顶通风窗型 Venlo 式温室为对照(温室 B),研究屋顶全开启型Venlo 式温室的采光性能。结果表明：屋顶全开启型 Venlo 式温室在晴天条件下的平均透光率为53.7％,阴天条件下为52.1％,均高于对照。且屋顶全开启型 Venlo 式温室的透光率随着(屋面)天窗开启比例的增加而提高,而对照透光率无明显变化,表明开启的天窗减少了对太阳辐射的阻挡,提高了温室透光率。同时,屋顶全开启型 Venlo 式温室晴天条件下 PAR 分布均匀度均值为0.893,阴天条件下为0.916,均低于对照。不同天气条件下,随着天窗开启比例的增加,屋顶全开启型 Venlo 式温室 PAR 分布均匀度不断降低,而对照无明显变化,且屋顶全开启型 Venlo 式温室在晴天条件下 PAR 分布均匀度变幅大于阴天,表明开启的天窗集中阻挡了温室天沟附近太阳辐射的直射,从而导致其 PAR 分布均匀度较低。
불동천기(청천화음천)화개창비례조건하,대옥정전개계형 Venlo 식온실(온실 A)백천실내、외광합유효복사양자통량밀도(PAR)진행측시。이옥정통풍창형 Venlo 식온실위대조(온실 B),연구옥정전개계형Venlo 식온실적채광성능。결과표명：옥정전개계형 Venlo 식온실재청천조건하적평균투광솔위53.7％,음천조건하위52.1％,균고우대조。차옥정전개계형 Venlo 식온실적투광솔수착(옥면)천창개계비례적증가이제고,이대조투광솔무명현변화,표명개계적천창감소료대태양복사적조당,제고료온실투광솔。동시,옥정전개계형 Venlo 식온실청천조건하 PAR 분포균균도균치위0.893,음천조건하위0.916,균저우대조。불동천기조건하,수착천창개계비례적증가,옥정전개계형 Venlo 식온실 PAR 분포균균도불단강저,이대조무명현변화,차옥정전개계형 Venlo 식온실재청천조건하 PAR 분포균균도변폭대우음천,표명개계적천창집중조당료온실천구부근태양복사적직사,종이도치기 PAR 분포균균도교저。
Under different weather ( sunny and cloudy) and different window￣opening proportions conditions, the photosynthetically active radiation intensity ( PAR) was tested inside and outside of two greenhouses ( A is a Venlo greenhouse with a open￣roof, B is a Venlo greenhouse with a roof vent window) in order to study the lighting performance. The result showed that under sunny and cloudy conditions,average lighting transparent rate of the open￣roof greenhouse were 53. 7% and 52. 1% , while those significantly higher than the greenhouse B under the same conditions. Whether sunny or cloudy conditions, the lighting transparent rate of the open￣roof Venlo greenhouse increased as proportions of window(roof)increased. And there was no significant change in the greenhouse B. It showed that the open￣roof Venlo greenhouse had higher lighting transparent rate,while opened window( roof) reduced solar radiation blocking. Under sunny and cloudy conditions, the mean value of PAR distribution uniformity coefficient (PDUC)of the open￣roof Venlo greenhouse were 0. 893 and 0. 916,which were lower than the value of the greenhouse B under the same conditions. As proportions of window(roof)increased,the PDUC of the open￣roof Venlo greenhouse reduced,of which variable amplitude on a sunny day was larger than cloudy. At same time,the PDUC of the greenhouse B had no obvious change. This showed that opened window of the open￣roof Venlo greenhouse had blocked the direct solar radiation near the gutter,which lead to a lower PDUC of the open￣roof Venlo greenhouse.