Combination of forced ventilation and fogging systems for cooling greenhouses
Combination of forced ventilation and fogging systems for cooling greenhouses
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DOI：
10.1016/s1537-5110(02)00216-7
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发表时间：
2003-01-01
影响因子：
5.1
通讯作者：
Shklyar, A
中科院分区：
文献类型：
--
作者：
Arbel, A;Barak, M;Shklyar, A
这项工作的重点是与冷却温室强制通风相结合的雾化系统的操作特性。该冷却系统按照以下方案安装和运行：高压喷嘴，尽可能分布均匀，风机在温室的两端（南北）放置在地面上，屋顶开口和两侧开口（东、西）。结果表明，在夏季中午，温室内的空气温度和相对湿度分别保持在28度和80%。此外，获得的结果显示气候条件的均匀性普遍较高(相同量级的温度测量误差-+/-0（。）5度)，在温室内，在纵向（南北）和垂直方向。与此相反，在温室宽度上（东西方向）存在显著变化，这是风作用的结果；然而，在植物发达的温室或关闭迎风开口的条件下，获得了均匀的条件。必须得出的结论是，为了在温室的整个体积中获得完全均匀的气候条件，最好在四面都安装风扇。这样的安排可能使：在期望范围内的均匀气候条件，即使在夏季；通过减少风的影响，对气候条件进行良好的控制；通过相对简单的控制系统来操作温室；建立大棚单位，从而更好地利用土地面积，大大降低单位面积的结构成本。(C) 2003年西尔索研究所。爱思唯尔科学有限公司版权所有
This work focuses on the operational characterisation of a fogging system in combination with forced ventilation for cooling greenhouses. This cooling system was installed and operated according to the following scheme: high-pressure spray nozzles with the highest possible uniformity of distribution, fans at both ends of the greenhouse (north and south) placed at ground level, roof openings and two side openings (east and west). The results obtained revealed that inside the greenhouse air temperature and relative humidity of 28degreesC and 80%, respectively, were maintained during the summer at midday. Furthermore, the results obtained revealed generally high uniformity of the climatic conditions (the same magnitude of temperature measurements error -+/-0(.)5degreesC), within the greenhouse, in the lengthwise (north-south) and vertical directions. In contrast to that, there was significant variation across the width of the greenhouse (east-west), which arose as a result of wind action; however, under the conditions of a greenhouse with developed plants or with the windward openings closed, uniform conditions were obtained. It must be concluded that in order to obtain completely uniform climatic conditions throughout the volume of the greenhouse, it is desirable to install fans in all four sides. Such an arrangement may make possible: uniform climatic conditions within the desired range, even in the summer months; good control over the climatic conditions through reduction of the influence of the wind; operation of the greenhouse by means of a relatively simple control system; the establishment of greenhouses in large units and, consequently, better exploitation of the land area and significant reduction in the cost per unit area of the structure. (C) 2003 Silsoe Research Institute. All rights reserved Published by Elsevier Science Ltd.