Effects of Different North-wall Structures on Thermal Insulation Properties of  Solar Greenhouses(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effects of Different North-wall Structures on Thermal Insulation Properties of  Solar Greenhouses

Author(s):: SHI Yu; ZHANG Yi; LI Shu; LI Meilan; HOU Leiping; (College of Horticulture，Shanxi Agricultural University，Taigu，Shanxi 030801)

Keywords:: north-wall; solar greenhouse; compound structure; thermal insulation properties

Abstract:: Optimizing the wall structure and exerting its performance of heat preservation to greatest extent，is significant to improve the technologies in solar greenhouse crop production.Three solar greenhouses with different north wall structures，including brick-loess wall (a layer of 50 cm loesses between two 24 cm bricks)，brick-cinder wall (a layer of 50 cm cinders between two 24 cm bricks) and brick-polystyrene wall (the inner 37 cm bricks and the outer 10 cm polystyrene boards)，were used as research subjects in this study.The change rules of the indoor air temperature，the heat transfer capacity and the inner surface temperature of north-wall were analyzed under typical weather days.And the spatial and temporal distribution features of temperatures in different north walls were also investigated.Differences of thermal insulating properties of the three solar greenhouses were preliminary evaluated.The results showed that the brick-polystyrene north-wall had the better instantaneous heat absorption and dissipation capacities，while its heat-storage and discharge persistence was poor.Moreover，the brick-loess north wall had the better instantaneous heat absorption and continuous thermal insulating integrated properties.Overall，the solar greenhouse with brick-loess north wall had more extensive spreading values in Jinzhong area.

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Last Update: 2017-05-02