日光温室夏季降温措施的试验研究初报

Primary Report of the Experimental Research on Cooling Measures in Solar Greenhouse During Summer

针对日光温室的夏季降温需要 ,分别对自然通风、自然通风 +遮阳网系统、自然通风 +微喷降温系统、自然通风 +遮阳网 +微喷降温系统四种措施进行对比试验 ,分析了这 4种措施对室内的气温、相对湿度和地温的影响。结果表明 ,自然通风 +遮阳网系统下温室内的气温最多降低 2 .2℃ ,白天平均降低 1.4℃ ,室内地温平均降低3.8℃ ,最多可降低 4.5℃ ;自然通风 +微喷降温系统下温室内气温最多降低 3.2℃ ,平均降低 2 .4℃ ,地温最多降低2 .0℃ ,平均降低 0 .9℃ ;在自然通风情况下联合运用遮阳网和微喷降温系统室内气温最多降低 5 .4℃ ,平均降低4.4℃ ,与室外气温相比 ,最多高 1.9℃ ,平均仅高 0 .7℃ ,基本接近室外气温。而在自然通风条件下 ,室内的气温比室外气温最多高 7.2℃ ,平均高 5 .1℃。可见 ,自然通风 +遮阳网

In view of the need of cooling in solar greenhouse during summer, the contrast experiments of four kinds of cooling measures of natural ventilation, sun shading net under natural ventilation, micro spray irrigation cooling system under natural ventilation, and joint use of sun shading net and micro spray irrigation cooling system under natural ventilation were carried out respectively. The effects of the four kinds of cooling measures on air temperature, relative humidity, soil temperature at 10 cm in depth in greenhouse were measured and discussed. The results show that air temperature decreased 2.2℃ at most and 1.6℃ on an average, soil temperature at 10 cm in depth decreased 3.8℃ on an average of daytime and decreased 4.5℃ at most in greenhouse under the sun shading net and natural ventilation condition. The air temperature decreased 3.2℃ at most and decreased 2.4℃ on an average, soil temperature at 10 cm in depth decreased 2.0℃ at most and decreased 0.9℃ on an average in greenhouse with the micro spray irrigation cooling system and natural ventilation condition. The air temperature decreased 5.4℃ at most and 4.4℃ on an average in greenhouse with the joint use of sun shading net and micro spray irrigation cooling temperature system under natural ventilation condition. The air temperature inside the greenhouse was 1.9℃ higher at most, but only 0.7℃ higher on an average than that outside the greenhouse, approaching the air temperature outside greenhouse basically. The air temperature inside the greenhouse under natural ventilation condition was 7.2℃ higher at most and 5.1℃ higher on an average than that outside the greenhouse. It is clear that the cooling measure of the joint use of sun shading net and micro spray irrigation cooling system under natural ventilation cooling temperature is the optimum.