摘要
位于中高纬度地区的温室,都难以避免冬季夜间相对湿度过高、温度较低的问题。本研究以中国日光温室为研究对象,提出了一种将窄槽式集热器与固体除湿剂相结合的温室热湿调控系统。通过光学模拟和几何计算,当窄槽式集热器的放置倾角为30?时,能够在北纬40°的北京冬季,为窄槽式集热器提供80%以上的光线接收率。该系统在冬季夜间,将温室内相对湿度从94.2%的高湿区间降低到81.3%的作物正常生长区间,室内平均温度上升1.2℃。白天脱附阶段,窄槽式集热器的最高出口温度为136℃,平均集热效率为0.62。该系统结合太阳能中温集热技术与可再生的固体除湿剂,将冬季日光温室内的空气环境调整到了作物生长的适宜区间。
Greenhouses located in middle and high latitudes are difficult to avoid the problem of high relative humidity and low temperature at night in winter.In this study,a greenhouse heat and humidity control system combining narrow trough collector and solid desiccant was proposed for a Chinese solar greenhouse.Through optical simulation and geometric relationship analysis,the narrow trough collector placed at an angle of 30°can provide more than 80%of light reception efficiency for the narrow trough collector in winter in Beijing at 40°N latitude.The system was able to regulate the nighttime relative humidity of the greenhouse from a high humidity range of94.2%to a normal crop growth range of 81.3%in winter,with an average relative humidity decrease of 12.9%and an average indoor temperature increase of 1.2℃.The maximum outlet temperature of the narrow trough collector during the daytime desiccation stage was 136℃,and the average collector efficiency was 0.62.The system combined solar medium temperature collector technology with recyclable solid desiccant to control the air environment in the greenhouse in winter to a crop growth suitable zone.
作者
陈辛格
伍纲
冯朝卿
姬亚宁
马前磊
程瑞锋
CHEN Xinge;WU Gang;FENG Chaoqing;JI Yaning;MA Qianlei;CHENG Ruifeng(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agriculture Sciences,Beijing 100081,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2024年第4期962-969,共8页
Journal of Engineering Thermophysics
基金
国家重点研发计划战略性科技创新合作专项(No.2020YFE0203600)
国家自然科学基金(No.51806244,No.51766013)
内蒙古科技重大专项(No.2021ZD0030)
2022年度自治区直属高校基本科研业务费项目(No.JY20220396)。
关键词
窄槽式集热器
太阳能
温室
固体除湿剂
narrow trough collector
solar energy
greenhouse
solid desiccant
