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Effect of covering materials on greenhouse energy consumption and microclimate, and on growth and development of stocks and snapdragons.

机译：覆盖材料对温室能源消耗和微气候以及种群和金鱼草生长发育的影响。

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摘要

The objective of the present study was to provide an extensive energy, microclimatic and agronomic assessment of single glass (GL) and several double anti-fog polyethylene (PE) cladded greenhouses. The effects of thermal screen (TS) and supplementary lighting under four covering materials on energy consumption and plant growth were also studied.;The outside layer of double inflated PE houses was standard PE. For the inside layers, anti-fog 1-year (AF1), anti-fog 3-year (AF3) and anti-fog thermal (AFT) PE films were installed for three identical compartments, respectively. All films were maintained for three years. The single glass cladding was always combined with the use of thermal screen during the night, while thermal screen in the PE houses was deployed two out of four weeks for comparing its effectiveness. There were two light regimes in each compartment: ambient and ambient + supplementary lighting. Supplementary lighting (60 ;From this three year study, we can conclude that the greenhouse covered with double polyethylene with AFT layer was the most effective in terms of energy savings (reduction of 11 to 23% in whole day energy consumption compared to GL + TS). The thermal properties of the greenhouse with an AF3 was similar to or slightly better than GL + TS. AF1 had a greater heat loss coefficient and showed a greater relative decrease in energy consumption due to a thermal screen than other PE cladded houses. This study also showed that the contribution of supplementary lighting to the total greenhouse heating demand is not negligible. The proportion of useful heat supplied by the lamps increased with the temperature difference between inside and outside air (;Among the PE materials, anti-fog 3-year film was the most transparent to PAR. PD in the double plastic houses was 0.2kPa lower than under GL in the winter season. The difference in RH between various anti-fog films was not significant. The use of a thermal screen in a double PE greenhouses caused no significant modification in greenhouse humidity. There was only a slight difference in the growth and development of stocks and snapdragons grown under single glass and double anti-fog PE coverings. (Abstract shortened by UMI.)
机译：本研究的目的是对单个玻璃（GL）和几个双层防雾聚乙烯（PE）覆盖的温室提供广泛的能源，微气候和农艺学评估。还研究了四种覆盖材料下的热屏（TS）和辅助照明对能源消耗和植物生长的影响。双层充气PE房屋的外层是标准PE。对于内层，分别为三个相同的隔室安装了防雾1年（AF1），防雾3年（AF3）和防雾热（AFT）PE膜。所有电影都维持了三年。晚上总是将单个玻璃包层与隔热屏结合使用，而在PE房屋中，隔热屏则每四周部署两次，以比较其有效性。每个隔间中有两种照明方式：环境和环境+辅助照明。辅助照明（60;从这项为期三年的研究中，我们可以得出结论，就节能而言，覆盖有双层聚乙烯并带有AFT层的温室是最有效的（与GL + TS相比，全天能耗减少了11％至23％ ）。AF3温室的热学性能与GL + TS相似或稍好，AF1的热损失系数更大，并且由于采用了热屏蔽技术，与其他PE覆层房屋相比，AF1具有更大的相对能耗降低。研究还表明，辅助照明对温室总供暖需求的贡献不可忽略。随着室内外空气温度的不同，灯具提供的有用热量的比例也随之增加（;在PE材料中，防雾剂3-年膜对PAR最透明，冬季双层塑料屋中的PD比GL下低0.2kPa，各种防雾膜之间的RH差为n。非常重要。在双PE温室中使用热网不会引起温室湿度的明显变化。在单层玻璃和双层防雾PE覆盖层下生长的种群和金鱼草的生长和发育仅有微小差异。 （摘要由UMI缩短。）

著录项

  • 作者

    Zhang, Yun.;

  • 作者单位

    Universite Laval (Canada).;

  • 授予单位 Universite Laval (Canada).;
  • 学科 Agriculture Plant Culture.;Engineering Agricultural.
  • 学位 Ph.D.
  • 年度 1995
  • 页码 141 p.
  • 总页数 141
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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