A localized cooling system for a solar greenhouse and a cooling method based on it
A solar greenhouse and lifting system technology, applied in the field of solar greenhouse local cooling system, can solve the problems of inconsistent development direction of solar greenhouse facilities modernization, reduce land utilization rate, etc.
Inactive Publication Date: 2016-06-29
CHINA AGRI UNIV
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Problems solved by technology
The high temperature in the solar greenhouse in summer is not conducive to the growth of crops, which leads to the idleness of the solar greenhouse in summer and reduces the land utilization rate, which is seriously inconsistent with the modern development direction of solar greenhouse facilities
Method used
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Embodiment
[0104] In the solar greenhouse of the Shangzhuang Experimental Base of China Agricultural University, a set of "local cooling system for solar greenhouse" was installed. The solar greenhouse is 60m long from east to west, with a span of 8.0m, a ridge height of 4.0m, a rear wall height of 2.8m, a rear wall thickness of 0.67m, and a horizontal projection length of 1.5m on the rear roof. It adopts a steel truss structure with a truss spacing of 1m. Tomatoes are planted in the solar greenhouse. , A total of 40 ridges, ridge width 0.5m, spacing between ridges 1.0m.
[0105] (1) System design and installation
[0106] Determine the parameters of the wet curtain air cooler and the size of each pipe according to the cooling requirements: take the average outdoor temperature of 30°C and the relative humidity of 58%, so that the air temperature around the plants is 26°C and the relative humidity is 85%. According to the formula Q×ρ×Δh×1000 / 3600=300×s, the total ventilation volume is about 1...
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The invention belongs to the field of greenhouse environment facilities and particularly relates to a solar greenhouse local cooling system and a cooling method based thereon. The system comprises an air cooler, a pipeline system and a lifting system; the air cooler is mounted on the outer side of a rear wall of a greenhouse, and the pipeline system and the lifting system are arranged in the solar greenhouse; a main pipeline of the pipeline system is connected to an air outlet of the air cooler, and a plurality of horizontal branch pipelines of the pipeline system are connected to the main pipeline through vertical telescopic pipes; the lifting system drives the horizontal branch pipelines to lift vertically; the horizontal branch pipelines are provided with air ports. When greenhouse internal proper temperature cannot maintained through the normal ventilation, the air cooler and pipeline parameters are determined according to the cooling requirements; the air cooler operates, the heights of the horizontal branch pipelines are adjusted according to those of plants, and the optimal cooling effect is maintained. The system has the advantages that plant canopy upper local environmental temperature can be decreased effectively, the temperature gradient is small, the energy consumption is small, and the production time of the greenhouse in summer can be prolonged.
Description
Technical field [0001] The invention belongs to the field of greenhouse environmental facilities, and specifically relates to a solar greenhouse local cooling system and a cooling method based thereon. Background technique [0002] As the main body of my country's facility agriculture industry, the solar greenhouse industry has become the most profitable industry in the agricultural planting industry in recent years. The solar greenhouse industry has made efforts to solve the long-term problem of the off-season supply of vegetables in winter in northern my country, increase farmers' income, save energy, promote the adjustment of agricultural industry structure, promote related industries, develop employment placement, and avoid environmental pollution caused by greenhouse heating. Important contribution. [0003] The solar greenhouse has the obvious advantages of energy saving and environmental protection, and can make full use of idle land and labor in winter. The high temperatur...
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IPC IPC(8): A01G9/26
CPCA01G9/24Y02A40/25
Inventor 宋卫堂赵淑梅郑建锋李世平马双双孙雪
Owner CHINA AGRI UNIV