Electrical Energy Producing Greenhouse Shading System with a Semi-Transparent Photovoltaic Blind Based on Micro-Spherical Solar Cells
Electrical Energy Producing Greenhouse Shading System with a Semi-Transparent Photovoltaic Blind Based on Micro-Spherical Solar Cells
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DOI：
10.3390/en11071681
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发表时间：
2018-06
期刊：
影响因子：
3.2
通讯作者：
Zhi Li;A. Yano;M. Cossu;H. Yoshioka;Ichirou Kita;Y. Ibaraki
中科院分区：
文献类型：
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作者：
Zhi Li;A. Yano;M. Cossu;H. Yoshioka;Ichirou Kita;Y. Ibaraki
不断增长的人口和有限的耕地面积危及世界范围内充足和多样化的粮食供应。温室栽培使植物生产高度集约化，从而能够生产大量新鲜蔬菜和水果。温室栽培的显著效益得益于对作物环境的巧妙管理，以及化石燃料和电网供电的辅助。为了减少对传统能源的依赖，各种研究对可再生能源的开发用于温室环境管理进行了探讨。其中，太阳能光伏（PV）技术有望为温室电器提供电能，用于小气候控制。本研究提出了一种基于微球形太阳能电池技术，由半透明光伏组件作为盲叶组成的百叶遮阳系统，实现温室遮阳和发电并作。根据太阳辐照度的变化，PV遮光罩的倾斜度由PV遮光罩本身产生的电能驱动的直流（DC）电机自动改变。在5个月的测试期间，PV盲器连续运行，没有中断。此外，光伏盲器在测试期间产生了2125 kJ的多余电能用于盲器系统运行。在目前的实验条件下计算出的年剩余能量为7.8 kWh m−2 year−1，这表明在温室屋顶上应用PV遮阳板可以在减少燃料和电网供电的情况下控制日光水平和温室内的电器操作，特别是在高日照地区。
An increasing population and limited arable land area endanger sufficient and variegated food supplies worldwide. Greenhouse cultivation enables highly intensive plant production and thereby enables the production of abundant fresh vegetables and fruits. The salient benefits of greenhouse cultivation are supported by ingenious management of crop environments, assisted by fossil fuel and grid electricity supplies. To reduce dependence on traditional energy resources, various studies have investigated exploitation of renewable energies for greenhouse environment management. Among them, solar photovoltaic (PV) technologies are anticipated to feed electrical energy to greenhouse appliances for microclimate control. This study proposes a venetian-blind-type shading system consisting of semi-transparent PV modules as blind blades based on micro-spherical solar cell technology to achieve greenhouse shading and electricity production concurrently. In response to the solar irradiance level, the PV blind inclination was altered automatically using a direct current (DC) motor driven by electrical energy generated by the PV blind itself. The PV blind was operated continuously during a five-month test period without outage. Moreover, the PV blind generated surplus electrical energy of 2125 kJ for blind system operations during the test period. The annual surplus energy calculated under the present experimental condition was 7.8 kWh m −2 year −1 , suggesting that application of the PV blind to a greenhouse roof enables sunlight level control and electrical appliance operations in the greenhouse with a diminished fuel and grid electricity supply, particularly in high-insolation regions.