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文章以维持温室最冷月夜间温度12℃以上为目标,研究比较了太阳能加热系统和传统加热系统对温室温度的调节原理和调节效果。太阳能加热系统的热交换器为光管散热器,分为两组,分别悬挂在空中和埋设在地下,用于温室的空气加温和地面的蓄热加温。白天,悬挂在空中的热交换器吸收温室多余能量,通过埋在地下的热交换器将其储存在地下;夜间,储存在地下的热能通过热交换器重新释放出来加热温室空气。传统加热系统的热源为一台15kW的锅炉。实验结果表明:太阳能加热系统在12月至次年1月的最冷几天中供热量不能满足温室作物的需求,但在其它时间,相比传统加热系统更有利于温室环境的调节。因为这种加热系统不仅可用于夜间加热,而且还能避免白天温室内过高温度影响植物生长。这套太阳能加热系统每年能为温室提供360kWh/m2的热量,可节省大量的化石燃料。如果突尼斯国内1400公顷温室全部采用这种加热系统,每年可节约化石燃料5×109kWh。
The article aims to maintain the temperature of the coldest month in the greenhouse at 12 ℃ and above, and studies and compares the regulation principle and regulation effect of the solar heating system and the traditional heating system on the greenhouse temperature. The heat exchanger of the solar heating system is a light pipe radiator, which is divided into two groups, which are respectively suspended in the air and buried in the ground for warming the air in the greenhouse and the heat storage on the ground. During the day, the heat exchanger suspended in the air absorbs the excess energy in the greenhouse and is stored underground by a heat exchanger buried in the ground. At night, the heat stored underground is re-released by the heat exchanger to heat the greenhouse air. The heat source of a traditional heating system is a 15kW boiler. The experimental results show that the solar heating system can not meet the demand of greenhouse crops in the coldest days from December to January of the next few days, but at other times, it is more conducive to the regulation of greenhouse environment than the traditional heating system. Because this heating system can not only be used for heating at night, but also to avoid excessive temperature in the greenhouse during the growth of plants. This solar heating system provides 360kWh / m2 of heat per year for the greenhouse, saving a lot of fossil fuel. If all of Tunisia’s 1,400-hectare greenhouses are equipped with this heating system, it will save 5 × 109 kWh of fossil fuel per year.