室内气流组织对光伏窗热电性能影响的实验研究
发布时间：2018-11-05 20:50
【摘要】：我国建筑能耗约占社会总能耗的33%,其中由外窗传热引起的建筑空调采暖能耗占建筑总能耗的25%~40%左右。因此,外窗节能已成为我国节能减排、打造绿色建筑的关键环节之一。太阳能作为一种可再生能源,以其储量大、无污染、高性能而倍受青睐,太阳能利用也成为了人们研究的重点。太阳能光伏窗作为光伏建筑一体化的重要应用形式,在利用光电效应发电的同时,能够在很大程度上减少透过外窗的太阳辐射得热,被认为是实现外窗主动节能的有效途径之一。光伏窗的热电性能受建筑内外部环境影响,目前对建筑外环境影响的研究较多,但对于建筑内环境影响的研究,包括室内气流组织对光伏窗性能影响的研究却未见有发表。因此,本文从建筑内环境影响的角度出发,在太原地区建立了光伏窗热电性能实验平台。本文通过实验对比研究了夏季混合送风系统与分层空调系统下,室内气流温度和送风速度对非晶硅半透明单层光伏窗热电性能的影响;此外,本文对冬季非晶硅半透明双层光伏窗在分层空调系统下的热电性能进行测试研究,并对不同工况下的建筑内环境热舒适性进行了对比分析。本文得出的主要结论如下:(1)夏季工况下,随着室内气流温度的降低,光伏窗发电性能逐渐提高,但经光伏窗传入室内的热量也逐渐增加。当室内温度由26℃降至20℃时,混合送风系统下光伏窗的直流输出功率提高了6.7%,得热量增加了14.5%;而分层空调系统下光伏窗的直流输出功率提高了2.3%,得热量增加了17.2%。(2)提高送风速度有利于改善光伏窗的发电性能,但相对室内气流温度,送风速度对光伏窗发电性能的影响较小。当送风速度由2m/s增大到3m/s时,混合送风系统下光伏窗的直流输出功率提高了2.1%;分层空调系统下光伏窗的直流输出功率提高了1.2%。送风速度对光伏窗得热的影响较为复杂,实验条件下,随着送风速度的提高,光伏窗得热呈现先增加后减少的变化趋势。当空调系统的送风速度为2.6m/s时,光伏窗得热最多。(3)与混合送风系统相比,在相同空调能耗的前提下,分层空调系统更有利于提高光伏窗的热电性能。当室内气流温度为20℃,空调送风速度为3m/s时,与混合送风相比,分层空调系统下光伏窗的内表面温度下降了20.3%,发电性能提高10.5%,而得热量则减少37.4%。(4)夏季制冷工况下,当混合送风系统室内气流温度为22℃和24℃时,房间工作区(0.1m≤z≤1.1m)基本能够满足热舒适性要求;但受限于实验条件,工作区人体头部高度位置(z=1.1m)存在由于较高送风速度所导致的明显吹风感。分层空调系统由于气流组织的特点,在夏季制冷和冬季制热工况下人体脚部高度都存在送风速度偏高的现象,且由于热羽流的作用,房间内工作区人体头脚高度的空气温差都超过了2℃,可能引起热舒适问题,在设计时应予以注意。
[Abstract]:The building energy consumption in our country accounts for about 33% of the total energy consumption of the society, among which the heating energy consumption of building air conditioning caused by the heat transfer of the outer window accounts for 25% or 40% of the total energy consumption of the building. Therefore, energy-saving outside window has become one of the key links of energy saving and emission reduction in China. Solar energy, as a kind of renewable energy, is favored for its large reserves, pollution-free and high performance. Solar energy utilization has also become the focus of research. Solar photovoltaic window, as an important application form of photovoltaic building integration, can greatly reduce the solar radiation through the outer window while generating electricity by using photovoltaic effect. It is considered to be one of the effective ways to realize the active energy saving of outer window. The thermal and electrical performance of photovoltaic windows is affected by the internal and external environment of the building. At present, there are many studies on the external environmental impact of the building, but the research on the impact of the indoor airflow on the performance of the photovoltaic window has not been published. Therefore, a photovoltaic window thermoelectric performance experimental platform is established in Taiyuan area from the view of the environmental impact of the building. In this paper, the effects of indoor air temperature and air velocity on the thermoelectric performance of amorphous silicon semitransparent single-layer photovoltaic windows in summer mixed air supply system and stratified air conditioning system are studied. In addition, the thermoelectric performance of amorphous silicon semi-transparent double-layer photovoltaic window in winter is tested and studied in this paper, and the thermal comfort of building environment under different working conditions is compared and analyzed. The main conclusions obtained in this paper are as follows: (1) under summer conditions, with the decrease of indoor air temperature, the performance of photovoltaic window power generation is gradually improved, but the heat transmitted through the photovoltaic window also increases gradually. When the indoor temperature is reduced from 26 鈩，
本文编号：2313417
[Abstract]:The building energy consumption in our country accounts for about 33% of the total energy consumption of the society, among which the heating energy consumption of building air conditioning caused by the heat transfer of the outer window accounts for 25% or 40% of the total energy consumption of the building. Therefore, energy-saving outside window has become one of the key links of energy saving and emission reduction in China. Solar energy, as a kind of renewable energy, is favored for its large reserves, pollution-free and high performance. Solar energy utilization has also become the focus of research. Solar photovoltaic window, as an important application form of photovoltaic building integration, can greatly reduce the solar radiation through the outer window while generating electricity by using photovoltaic effect. It is considered to be one of the effective ways to realize the active energy saving of outer window. The thermal and electrical performance of photovoltaic windows is affected by the internal and external environment of the building. At present, there are many studies on the external environmental impact of the building, but the research on the impact of the indoor airflow on the performance of the photovoltaic window has not been published. Therefore, a photovoltaic window thermoelectric performance experimental platform is established in Taiyuan area from the view of the environmental impact of the building. In this paper, the effects of indoor air temperature and air velocity on the thermoelectric performance of amorphous silicon semitransparent single-layer photovoltaic windows in summer mixed air supply system and stratified air conditioning system are studied. In addition, the thermoelectric performance of amorphous silicon semi-transparent double-layer photovoltaic window in winter is tested and studied in this paper, and the thermal comfort of building environment under different working conditions is compared and analyzed. The main conclusions obtained in this paper are as follows: (1) under summer conditions, with the decrease of indoor air temperature, the performance of photovoltaic window power generation is gradually improved, but the heat transmitted through the photovoltaic window also increases gradually. When the indoor temperature is reduced from 26 鈩，
本文编号：2313417
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