摘要: |
为研发适用于日光温室简易相变储热装置,本文提出一种基于硬脂酸丁酯相变材料的多管(PVC)阵列储热结构,改造新疆吐鲁番的一个既有日光温室,实验研究改造后的日光温室热环境。结果表明:相同光照时间(冬季光照6 h)条件下,黑表面储热装置的蓄热量比白表面大66.7%;对比三种直径PVC管材硬脂酸丁酯蓄热体,直径75 mm最为适合。与传统日光温室对照,采用多管阵列储热的日光温室的夜间平均温度提高1.2 ℃以上,硬脂酸丁酯的单位实际蓄热量可达163 kJ/kg(包含显热)。本文多管阵列储热结构具有造价低、安全可靠、简单易行等特点,可在日光温室规模化应用。 |
关键词: 日光温室 相变蓄热 多管阵列 硬脂酸丁酯 应用 |
DOI: |
投稿时间:2022-04-29 修订日期:2022-07-29
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基金项目:周远院士工作站(SZ20211166)专项经费资助。 |
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Application of a Multi Tube Array Phase Change Thermal Energy Storage Device in Solar Greenhouses |
Li Weizhao1,2, Zhang Chong1, Wei Juan1, Yang Luwei1,2, Sheng Wei3, Pan Hongmin4
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(1.Technical Institute of Physics and Chemistry, Chinese Academy of Sciences;2.School of Future Technology, University of Chinese Academy of Sciences;3.College of Mechanical and Power Engineering, Henan Polytechnic University;4.Shandong Institute of Commerce and Technology) |
Abstract: |
This study proposed a multi-tube (polyvinyl chloride, PVC) array thermal energy storage structure based on butyl stearate phase change material, aiming to develop a simple and low-cost thermal energy storage device for solar greenhouses. The thermal environment of a greenhouse with a multi-tube array thermal energy storage device was studied through a series of experiments. The results indicated that the heat storage capacity of the device with a black surface was 66.7% higher than that with a white surface under similar irradiation conditions. Compared to devices with diameters of 50 mm and 110 mm, the discharging performance was the best when using a 75 mm PVC pipe containing butyl stearate. Moreover, in contrast to traditional solar greenhouses, the nighttime average temperature of the solar greenhouse with the multi-tube array thermal energy storage device was higher by more than 1.2 ℃, and the in-situ thermal energy storage capacity of the unit with butyl stearate reached 163 kJ/kg (including sensible heat). Therefore, multi-tube array thermal energy storage devices, which are economical, safe, and simple, can be widely applied in solar greenhouses. |
Key words: solar greenhouse phase-change thermal energy storage multi-tube array butyl stearate application |