摘要
为研究聚苯乙烯型砖复合墙的保温蓄热特性,对聚苯乙烯型砖复合墙日光温室的室内外气温,后墙表面太阳辐射照度及其内部温度进行了测试分析。聚苯乙烯型砖复合墙由24 cm填充混凝土聚苯乙烯型砖、45 cm填土和5 cm混凝土板复合而成。测试结果表明,聚苯乙烯型砖复合墙内表面温度在阴天和晴天保温被闭合期间分别较室内气温高(2.5±0.2)℃和(5.4±1.4)℃。该墙体在阴天和晴天的放热区域分别为17 cm和30 cm,低于填土与混凝土板的厚度。填充混凝土聚苯乙烯型砖的热阻达到了2.93 m2 K/W,是当地日光温室后墙低限热阻的2倍。该结果表明聚苯乙烯型砖复合墙填土厚度及聚苯乙烯型砖热阻可满足墙体放热及保温的需求。另外,模拟结果表明,在同等室内外气温和墙体内表面太阳辐射的条件下,聚苯乙烯型砖复合墙在晴天和阴天保温被闭合期间的内表面温度与黏土砖夹心墙(24 cm黏土砖+10 cm聚苯板+24 cm黏土砖)相近。因此,聚苯乙烯型砖复合墙体保温蓄热性能良好,可用于取代黏土砖夹心墙。
In this study, a polystyrene-brick composite wall, which is composited with the polystyrene-brick filled with concrete, soil and concrete board, was developed to be the north wall of the Chinese solar greenhouse（hereafter referred to as＂solar greenhouse＂）. The purpose of this study is to investigate the heat insulation and storage performances of the polystyrene-brick composite wall and to analyze the feasibility of substituting for the clay-brick sandwich wall. The tested solar greenhouse was located in Yongqing county, Langfang city, Hebei province（116°35′ E, 39°18′ N）. It was 80 m long and10 m wide. The north wall was the polystyrene-brick composite wall composited with 24 cm polystyrene-brick filled with concrete, 45 cm soil and 5 cm concrete board in the direction from exterior to interior. The polystyrene-brick, which was made with polystyrene, was 24 cm wide with a 12 cm-wide cavity. The test period was from Dec. 20, 2013 to Jan. 30, 2014. During the period, the tested solar greenhouse was used to growing zucchini and employed drop irrigation. The heat insulation sheet was rolled up and down at 8：00 and 16：30, respectively. The wind vent would be open if the indoor air temperature was high during daytime. The indoor and outdoor air temperatures, solar irradiating on the inner surface of the wall, the inner surface temperature and soil temperature in the wall were measured. The data collected in a typical cloudy day（from Dec. 25, 2013,8：00 to Dec. 26, 2013, 8：00） and a typical sunny day（from Dec. 28, 2013 8：00 to Dec. 29, 2013, 8：00） were used to analyze the heat performances of the polystyrene-brick wall. Then, the inner surface temperature of a clay-brick sandwich wall, which was composited with 24 cm clay-brick, 10 cm polystyrene board and 24 cm clay-brick, was simulated with one-dimension differential model to analyze the feasibility of substituting for the clay-brick sandwich wall. During the period when the solar greenhouse was covered with heat insulation sheet,
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2016年第1期200-205,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
863计划资助课题(2013AA102407-3)
公益性行业(农业)科研专项(201203002)
关键词
温室
温度
蓄热
日光温室
聚苯乙烯型砖
复合墙
保温蓄热
greenhouses
temperature
heat storage
solar greenhouse
polystyrene-brick
composite wall
heat insulation and storage
