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日光温室主动蓄热后墙传热CFD模拟及性能试验
  • ISSN号:1002-6819
  • 期刊名称:《农业工程学报》
  • 时间:0
  • 分类:S625.4[农业科学—园艺学] S625.1[农业科学—园艺学]
  • 作者机构:[1]西北农林科技大学园艺学院,杨凌712100
  • 相关基金:中国博士后基金项目(2014M562458);适合西北非耕地园艺作物栽培的温室结构与建造技术研究与产业化示范(201203002);博士科研项目联合资助(20120124)
中文摘要:

中国的日光温室实现了高效的能量利用,在中国北方地区的冬季农业生产中发挥了巨大的作用。但在实践生产中日光温室存在巨大的能量不平衡,给北方冬季的农业生产造成很大的损失,同时也限制了日光温室的高效应用。为了实现了日光温室对太阳能的高效利用,该文提出了一种能够将白天富裕能量进行有效存储的主动蓄热后墙日光温室。该文对主动蓄热后墙日光温室的室内温度和通风蓄热风道蓄热特性进行理论分析和试验,并与传统9 m跨的被动蓄热日光温室进行了对比分析。试验结果表明,主动蓄热后墙日光温室的温度指标有了较明显提高。在晴天和多云采光天气条件下,主动蓄热后墙日光温室室内的温度较9 m跨被动蓄热日光温室均有较大幅度的增加,在晴天夜间保温时段(16:00~次日09:00),主动蓄热后墙日光温室温度提高最小为1.8℃,最大为2.8℃,平均提高2.2℃;在多云天夜间保温时段(16:00~次日09:00),主动蓄热后墙日光温室温度提高最小为1.6℃,最大为4.2℃,平均提高2.2℃。该文利用CFD数值模拟对温室蓄热后墙的20℃等值面进行了分析,分析结果表明在定常条件下,通风主动蓄热的高效范围在10 m以内,有效长度在20 m以内。通过该试验,结合温室建筑的实践构造要求,确定的蓄热风道合理长度为20 m。

英文摘要:

Efficient utilization of solar energy is one of the important topics of structural optimization design of solar-greenhouse. And it is significant to the applied researches in this field and particularly to greenhouse energy conservation. Chinese solar greenhouse achieved high efficiency of energy expenditure in the practice. Solar greenhouse played a huge role in the agriculture production particularly in winter in northern China. However, solar greenhouse basically has two major problems. One problem is energy imbalance in the indoor greenhouse between daytime and nighttime. Solar greenhouse has to be ventilated due to the high indoor temperature in the daytime. And it has to be heated at night to protect vegetable from frost damage. According to statistical analysis, the losses to agricultural production brought by freezing injury are almost the sum losses by other stress. At the same time it also limits the efficient utilization of solar greenhouse. This paper introduces new types of solar-greenhouses. The innovation structure is the active energy-storage solar-greenhouse which can active storage heat during the daytime. Theoretical analysis was carried out on the indoor temperature and the regenerative properties of soil-air heat transfer of the active energy-storage solar-greenhouse in this paper. Comparing with the 9m-span normal solar-greenhouse with fixed back-wall, the active energy-storage solar-greenhouse has higher indoor temperature and temperature indicators have improved greatly. Under such experiment condition the active energy-storage solar-greenhouse is more efficient in utilization of solar energy and raising temperature. The indoor temperature in the greenhouse with active thermal storage technology has a great enhancement comparing with the normal type at clear and cloudy day. The mean indoor temperature increased by 1.8 to 2.8℃ in the active thermal-storage back wall solar-greenhouse within Nocturnal period (16:00-09:00) on Jan 15, 2014 (clear day). The average mean indoor temp

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期刊信息
  • 《农业工程学报》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学技术协会
  • 主办单位:中国农业工程学会
  • 主编:朱明
  • 地址:北京朝阳区麦子店街41号
  • 邮编:100125
  • 邮箱:tcsae@tcsae.org
  • 电话:010-59197076 59197077 59197078
  • 国际标准刊号:ISSN:1002-6819
  • 国内统一刊号:ISSN:11-2047/S
  • 邮发代号:18-57
  • 获奖情况:
  • 百种中国杰出学术期刊,中国精品科技期刊,中国科协精品科技期刊工程项目期刊,RCCSE中国权威学术期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘(网络版),英国农业与生物科学研究中心文摘,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),英国食品科技文摘,中国北大核心期刊(2000版)
  • 被引量:93231