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Affordable alternative to closed systems

机译：经济实惠的封闭系统替代方案

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摘要

Semi-closed greenhouses are a hot issue because of the energy savings they can achieve. However, semi-closed greenhouses require many technical adaptations and are very expensive. In many countries, they are not feasible because building aquifers is impossible. Dutch consultancy Climeco devised a simple alternative which will save almost the same amount of gas for a lower investment. Semi-closed greenhouse concepts have proved that energy consumption in greenhouse horticulture can be drastically reduced. However, to make production cost-effective the yields must also rise considerably. At the moment, growers are failing to sufficiently reach this increase in practice - the 20% rise necessary to compensate for the investment is only rarely achieved.The main obstacle appears to be fully utilising the advantages of the cooling capacity in the summer. And different cultivation methods have to be used. There is plenty of interest in the concept of semi-closed greenhouses, but in many regions outside the Netherlands it is impossible to build aquifers due to the local soil conditions. Consequently, semi-closed greenhouses are only within reach for a limited group of growers, who also have to be willing to make substantial investments.
机译：半封闭式温室由于可以节省能源而成为一个热门问题。然而，半封闭式温室需要许多技术改造并且非常昂贵。在许多国家，这是不可行的，因为不可能建造含水层。荷兰咨询公司Climeco设计了一种简单的替代方案，它将节省几乎相同量的天然气，从而降低了投资。半封闭式温室概念已经证明，可以大大减少温室园艺中的能源消耗。但是，为了使生产具有成本效益，产量也必须大大提高。目前，种植者在实践中未能充分实现这一增长-很少能补偿投资所需的20％增长。主要障碍似乎是在夏天充分利用制冷能力的优势。并且必须使用不同的栽培方法。半封闭式温室的概念引起了很多兴趣，但是在荷兰以外的许多地区，由于当地的土壤条件，不可能建造蓄水层。因此，半封闭式温室仅在少数种植者可及的范围内，他们也必须愿意进行大量投资。

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