摘要
为了深入研究大棚通风对大棚内温、湿度影响,基于能量与物质平衡原理建立了大棚内部温、湿度预测模型,对大棚内部温、湿度进行预测模拟,并以试验观测数据对模型进行了检验。结果表明,模拟晴天天窗开度50%(处理1)与100%(处理2)时,大棚温度预测值和实测值决定系数分别为0.98、0.99,相对湿度预测值和实测值决定系数为0.9,模型能较好的预测棚内温、湿度;大通风面积对大棚内温、湿度影响大于小通风面积,通风面积对大棚内温度影响比相对湿度影响明显。研究结果可为通风条件下塑料大棚温、湿度环境控制研究及南方塑料大棚生产管理提供参考依据。
To study the effects of ventilation on air temperature and relative humidity in the plastic greenhouse, a model for forecasting the greenhouse air temperature and relative humidity was established on the basis of the energy and mass balanee theory. Experiments were carried out to collect data to validate the model. The results showed that the simulated air temperature and relative humidity inside a plastic greenhouse agreed well with the measured data. The coefficients of determination （R^2） between the simulated and measured air temperature in the plastic greenhouse were respectively 0.98 and 0.99 under treatment 1 with ventilation window of 50% and treatment 2 with ventilation window of 100%, and R^2 between the simulated and measured relative humidity was 0.99. The larger area of ventilation was, the faster the air temperature and the relative humidity dropped. Ventilation area had a more obvious impact on cooling than on dehumidify. Consequently, the model could provide a scientific basis for the control of air temperature and relative humidity and production and management in southern in plastic greenhouse under ventilation conditions.
出处
《灌溉排水学报》
CSCD
北大核心
2013年第2期10-14,共5页
Journal of Irrigation and Drainage
基金
国家自然科学基金项目(50979077)
关键词
塑料大棚
自然通风
温度
相对湿度
plastic greenhouse
natural ventilation
air temperature
relative humidity
