Effects of greenhouse photovoltaic array shading on Welsh onion growth
Effects of greenhouse photovoltaic array shading on Welsh onion growth
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DOI：
10.1016/j.biosystemseng.2011.12.006
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发表时间：
2012-03-01
影响因子：
5.1
通讯作者：
Noda, Shuji
中科院分区：
文献类型：
--
作者：
Kadowaki, Masayuki;Yano, Akira;Noda, Shuji
利用可再生能源进行温室环境控制，以替代或减少燃料和电力线电力的消耗，是可持续温室作物生产的一个重要目标。本研究旨在应用太阳能光伏阵列为温室环境控制提供电力。光伏阵列安装在一个东西向的单栋温室的南屋顶内，其中大葱（Allium fistulosum L.）是水培的研究了光伏阵列遮光对大葱生长的影响。测试了两种PV阵列形式：直线和棋盘格。对于每种布置，光伏阵列覆盖温室屋顶面积的12.9%。在PV温室旁边，建造了与PV温室具有相同尺寸和取向的对照温室。大葱也在对照温室中栽培。直线排列的PV阵列（PV阵列）在栽培植物的生长期间连续地在特定区域上投射阴影。与对照大棚相比，PV阵列阴影下栽培的大葱鲜重和干重显著降低。棋盘式光伏阵列（PVc阵列）在生长期间间歇性地在PVc温室中投射阴影。因此，光伏阵列遮光对大葱FW和DW积累的抑制作用减弱。PVc阵列产生的电能与PV阵列相当，这是PVc阵列的另一个优点。(C)2012年IAgRE。由爱思唯尔有限公司出版。保留所有权利。
The use of renewable energy for greenhouse environment control to replace or reduce the consumption of fuel and power-line electricity is an important objective for sustainable greenhouse crop production. This study was undertaken to apply a solar photovoltaic (PV) array to supply electricity for greenhouse environment control. The PV array was mounted inside the south roof of an east west oriented single-span greenhouse, in which Welsh onion (Allium fistulosum L.) was cultivated hydroponically. Effects of PV-array shading on the Welsh onion growth were assessed. Two PV-array formations were tested: straight-line and checkerboard. For each arrangement, the PV array covered 12.9% of the greenhouse roof area. Beside the PV greenhouse, a control greenhouse was built with identical dimensions and orientation to those of the PV greenhouse. Welsh onion was cultivated also in the control greenhouse. The straight-line arranged PV-array (PVs array) cast shadows on a specific area of the cultivated plants continuously during the growth period. The fresh weight (FW) and dry-matter weight (DW) of Welsh onion cultivated under the PVs array shadow were significantly less than those of Welsh onion cultivated in the control greenhouse. The checkerboard PV-array (PVc array) cast shadows in the PVc greenhouse intermittently during growth. Consequently, the inhibitory effects of the PV-array shading on the FW and DW accumulations of Welsh onion were diminished. The electrical energy generated by the PVc array was comparable to that of the PVs array, which is another advantage of the PVc array. (C) 2012 IAgrE. Published by Elsevier Ltd. All rights reserved.