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本文对地下热交换系统在我国保护地蔬菜生产中的应用进行了研究。在北京郊区塑料大棚中进行的贮能加温试验表明,地下热交换系统能有效地贮存太阳能并用于夜间加温,因而使塑料大棚在不用燃料的情况下在夜间维持10℃左右的棚内外温差,同时也使棚内地温得到相应提高。采用地下热交换系统的塑料大棚在春季能比普通大棚提早20～30天达到适于喜温蔬菜定植的小气候条件,若进一步改进、完善以后,可望将喜温蔬菜的春季定植期比普通大棚提前一个月左右。本文还在实验资料的基础上,提出了地下热交换系统的数学模型。
In this paper, the application of underground heat exchange system in vegetable production in protected areas was studied. The energy storage warming test conducted in the plastic greenhouse in the suburbs of Beijing shows that the underground heat exchange system can effectively store solar energy and is used for heating at night, so that the plastic greenhouse can maintain a temperature difference between inside and outside of the greenhouse of about 10 ° C at night without using fuel , But also to raise the ground temperature in the shed accordingly. In the spring, the plastic greenhouse with the underground heat exchange system can reach the microclimate conditions suitable for the thermophilic vegetable colonization 20 to 30 days earlier than the ordinary greenhouses. If further improvement and perfection, the spring planting period of the thermophilic vegetables can be expected to be larger than that of ordinary greenhouses About a month in advance. Based on the experimental data, this paper also presents the mathematical model of underground heat exchange system.