摘要
针对湿帘风机温室试验对通过湿帘后空气温度测量困难的问题,设计屏蔽送风式、屏蔽非送风式和非屏蔽式3种测量方法,通过试验对3种测量方式的准确性及误差因素进行分析。结果表明:屏蔽非送风式的测量结果受湿帘液滴附着影响较小,测量结果准确可靠;屏蔽送风式测量值较真实值小,误差范围为0.1～3.2℃;非屏蔽式测量方式容易受到外界环境因素的影响,误差范围-2.7～3.9℃,波动范围较大。
During the operation of pad and fan system for greenhouse cooling,fog wafts appeared inside the greenhouse.If the fog adheres to a sensing part of a thermometer,measurement of air temperature through pad will decrease and cause errors.The study was conducted by three measurement methods which were non-aspirated thermocouple with shelter,aspirated psychrometer and bare thermocouple without the shelter.It was found that the result of the non-aspirated thermocouple with shelter provided the most accurate measurement values;the measurement result of the aspirated psychrometer was lower than the actual temperature and the error rang was 0.1-3.2 ℃;the measurement of the bare thermocouple was affected by environmental factors easily and the error rang was-2.7-3.9 ℃.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2011年第1期113-117,共5页
Journal of China Agricultural University
基金
国家科技支撑计划课题(2008BADA6B01)
沈阳市科技计划项目(1081198-3-00)
国家自然科学基金项目(31000921)
关键词
温室
湿帘风机
温度
测量方法
greenhouse
pad and fan cooling system
temperature
measurement method
