基于光伏光热的地下空间太阳能烟囱效应影响因素研究

发布时间：2018-05-25 00:14

本文选题：太阳能 + 传热　；参考：《农业工程学报》2017年18期

【摘要】：提出了将太阳能烟囱效应与太阳能光伏光热(PV/T)技术相结合来强化地下空间通风的技术措施。为研究该通风模式的影响因素,基于质量和热量平衡理论,建立了风井通风性能的数学模型,分析了换热器管排数、风井高度、热水水温和流速对通风性能的影响。结果表明:风井内换热器存在最大有效管排,管间距为0.032、0.038、0.047 m时换热器的最大有效管排数分别为9、13、18,在有效管排数范围内,随着管排数的增加风井出口温度升高,通风量先增大后减小;空气质量流量随着风井高度增加、热水温度升高明显增大,随着热水流速增大而缓慢增大;风井出口空气温度随着风井高度增加而降低,随着热水温度升高、流速增大而升高。最后,通过拟合得到计算风井空气质量流量的经验公式。
[Abstract]:Combining solar chimney effect with solar photovoltaic PV / T technology to enhance ventilation in underground space is put forward. In order to study the influencing factors of the ventilation model, based on the theory of mass and heat balance, the mathematical model of ventilation performance of air well is established, and the influence of tube discharge of heat exchanger, height of air well, temperature of hot water and velocity of water on ventilation performance is analyzed. The results show that the maximum effective tube row exists in the air well heat exchanger, and the maximum effective tube row number of the heat exchanger is respectively 9 ~ 13 ~ 18 when the tube spacing is 0.032 ~ 0.038 ~ 0.047 m, and the outlet temperature of the air well increases with the increase of the pipe discharge number. The air mass flow rate increases obviously with the height of the air well, and increases slowly with the increase of the velocity of the hot water, and the air temperature at the outlet of the air well decreases with the increase of the height of the air well. With the increase of hot water temperature, the velocity of water increases. Finally, the empirical formula for calculating air mass flow in air well is obtained by fitting.
【作者单位】：西南交通大学机械工程学院;
【基金】：建筑环境与能源高效利用四川省青年科技创新研究团队项目(2015TD0015) 国家自然科学基金面上项目(51678488)
【分类号】：TK519;TU962

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