湖南西部地区太阳能诱导室内通风研究及优化
发布时间：2019-03-28 18:49
【摘要】：我国湖南西部属于夏热冬冷地区,昼夜温差较高,夏季白天室内温度较高,当地居民以前由于生活条件和居住条件较差,室内很少采用空调降温。近年来,随着生活水平的提高以及在国家优惠政策“农村危房改造工程”的扶持下,越来越多的家庭住进了新房。为了改善室内夏季温度较高的问题,采用空调来改善室内环境舒适度的家庭逐渐增多,空调能耗也在急剧上升。为了降低空调能耗,研究一种适合湖南西部地区既节能又能改善室内热环境的技术是非常有意义的。本文通过对湖南西部地区气候条件和建筑特点的研究,提出了利用太阳能诱导室内通风技术,在房屋改造的同时考虑室内通风,从而达到既节能又能改善室内热环境的目的。本文主要进行了下列几项研究工作并得出如下结论:(1)对湖南西部地区室外气候和太阳辐射强度进行了测量,得到了湖南西部地区太阳辐射强度、室外温度月平均值和日变化数据。同时还选择了一座典型建筑并对其室内温度进行实地测量,得出夏季约34%的时间每日室外最高温度超过33℃;室内温度约30%的时间超过了30℃。(2)利用CFD技术对上述典型建筑内的室内温度场和流场进行模拟,得出房屋改造前,室内流速几乎为零;室内的温度除进出口温度略有降低外其余地方几乎没有改变;模拟温度结果比实测结果高0.4℃左右;(3)在上述研究的基础上设计了倾斜式集热屋面、倾斜式集热通道、倾斜式太阳能烟囱三种不同太阳能诱导通风设计方案。通过对三种设计方案的模拟得到以下结论:1)在太阳能诱导作用下,室内热环境改善效果较为明显。本文设计的倾斜式集热屋面、倾斜式集热通道及倾斜式太阳能烟囱三种方案的室内通风效果均比房屋改造前有所改善。在太阳能诱导作用下,设计方案的室内气流速度提高了0.1至0.25m/s,室内空气温度降低了约0.5至2℃;2)由于地窖的空气温度比室外进风的温度低,在进口分别考虑引入地窖空气和室外进风时,室内热环境的改善效果不同。引入地窖空气时的室内通风效果与室外进风时相比,室内气流速度高0.05~0.2m/s,室内温度低1~2℃,与室外进风时比较引入地窖风时室内改善效果较好;3)通过对倾斜式集热屋面、倾斜式集热通道、倾斜式太阳能烟囱三种设计方案进行对比分析选出了最优方案二,即倾斜式集热通道。在太阳能诱导作用下,倾斜式集热通道的室内气流速度可达0.2~0.3m/s,室内温度可降低2~3℃。
[Abstract]:The western part of Hunan province belongs to hot summer and cold winter, the temperature difference between day and night is higher, and the indoor temperature is higher during the summer. Because of the poor living conditions and living conditions, the indoor air conditioning is seldom used to cool the temperature. In recent years, with the improvement of the living standard and the support of the national preferential policy "Rural dilapidated Housing renovation Project", more and more families live in new houses. In order to improve the indoor temperature in summer, the number of households using air conditioning to improve the comfort of indoor environment is increasing gradually, and the energy consumption of air conditioning is also increasing sharply. In order to reduce the energy consumption of air conditioning, it is of great significance to study a technology which is suitable for the west of Hunan province to save energy and improve the indoor thermal environment. Based on the study of climate conditions and building characteristics in the western part of Hunan Province, this paper puts forward the use of solar energy-induced indoor ventilation technology and the consideration of indoor ventilation at the same time as the renovation of houses, so as to achieve the purpose of saving energy and improving the indoor thermal environment. The main work of this paper is as follows: (1) the outdoor climate and solar radiation intensity in the western part of Hunan Province are measured and the solar radiation intensity in the western part of Hunan Province is obtained. Outdoor temperature monthly average and daily variation data. At the same time, a typical building was selected and its indoor temperature was measured in the field. It was concluded that the highest outdoor temperature in summer was over 33 鈩，
本文编号：2449138
[Abstract]:The western part of Hunan province belongs to hot summer and cold winter, the temperature difference between day and night is higher, and the indoor temperature is higher during the summer. Because of the poor living conditions and living conditions, the indoor air conditioning is seldom used to cool the temperature. In recent years, with the improvement of the living standard and the support of the national preferential policy "Rural dilapidated Housing renovation Project", more and more families live in new houses. In order to improve the indoor temperature in summer, the number of households using air conditioning to improve the comfort of indoor environment is increasing gradually, and the energy consumption of air conditioning is also increasing sharply. In order to reduce the energy consumption of air conditioning, it is of great significance to study a technology which is suitable for the west of Hunan province to save energy and improve the indoor thermal environment. Based on the study of climate conditions and building characteristics in the western part of Hunan Province, this paper puts forward the use of solar energy-induced indoor ventilation technology and the consideration of indoor ventilation at the same time as the renovation of houses, so as to achieve the purpose of saving energy and improving the indoor thermal environment. The main work of this paper is as follows: (1) the outdoor climate and solar radiation intensity in the western part of Hunan Province are measured and the solar radiation intensity in the western part of Hunan Province is obtained. Outdoor temperature monthly average and daily variation data. At the same time, a typical building was selected and its indoor temperature was measured in the field. It was concluded that the highest outdoor temperature in summer was over 33 鈩，
本文编号：2449138
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