摘要
为了明确土壤新风系统在日光温室中应用的可行性,设置了不同风速(5.8、4.6、3.1m·s^(-1))条件,以监测土壤新风系统进出口空气温湿度及不同管道长度的气流温度,并计算了系统的热特性。结果表明:日光温室内部≥50cm深土壤的温度比较恒定,日变化幅度≤0.3℃。在5.8、4.6、3.1m·s^(-1)的流速下,新风经过系统温度分别提高了7.8~8.9、9.8~11.9、6.3~7.8℃;出口空气湿度分别为42.3%~52.0%、35.4%~40.3%、61.6%~83.6%;进出口焓差分别为7.7~9.4、9.9~12.1、9.3~12.5kJ·kg^(-1);运行时段内吸收土壤的热量分别为23 160、23 492、14 884kJ。土壤新风系统可以显著提升新风温度,出口处新风湿度低于室内空气湿度,具有良好的吸热能力,说明土壤新风系统可以用于冬季日光温室空气环境的调控。
To explore the feasibility of application of buried pipe fresh air system in solar greenhouse,three kinds of different air velocities（5.8,4.6,3.1m·s^（-1））were set up and monitored the air temperature and humidity of inlet and outlet of system,and recorded the temperature in the five points in pipe,and then thermal characteristics of the system were calculated.The results showed that the daily temperature difference was〈0.3℃.Under conditions of 5.8,4.6,3.1m·s^（-1）,the new air temperature increased 7.8-8.9,9.8-11.9,6.3-7.8℃,and air humidity of outlet were 42.3%-52.0%,35.4%-40.3%,61.6%-83.6%,and enthalpy difference of outlet and inlet were 7.7-9.4,9.9-12.1,9.3-12.5kJ·kg^（-1）,and the absorbed heat by the soil were 23 160,23 492,14 884kJ,respectively.Buried pipe fresh air system could significantly increased air temperature,and air humidity of the outlet was lower than indoor humidity,it had well capacity of absorption of heat.It illustrated that buried pipe fresh air system could be used to improve the air conditions in the solar greenhouse in winter.
出处
《北方园艺》
CAS
北大核心
2017年第8期60-64,共5页
Northern Horticulture
基金
山西省科技攻关资助项目(20130311010-2)
山西省重点研发计划一般资助项目(201603D221036-2)
关键词
日光温室
土壤新风系统
通风
solar greenhouse
buried pipe fresh air system
ventilation
