V.3 Polydome Concept Overview schedule since a large degree of uncertainty remains in the exact technological outfitting of the system and the associated costs. However, we believe that it should fall at least within this range. What we were able to estimate with relative accuracy are the greenhouse yields, from which we generated a range of annual earnings. The graph above represents both the high and low (pre-cost) earnings scenarios, which diverge significantly. The actual performance of the system is likely to fall somewhere in between the two extremes. The high annual earnings, which assume a direct sales model, result in an estimated earnings of around 4 million euros per year. The low annual earnings scenario, which uses more modest, preretail prices, generates around 1,5 million euros per year. Notably, even though costs are not subtracted in these calculations, these earnings compare favorably with the production of more traditional crops, such as tomatoes. A hectare of tomatoes producing at 60 kg per square meter and selling at an auction price of 0,72 cents yields 734.400 euros. It is important to note that the hydroponic plants module is still by far the most profitable in this system. Eliminating that module results in an earnings of around 600.000 per year for the remainder of the greenhouse, though then of course, extra space would be freed up for additional productivity. Our final conclusion is that, though there is quite a bit of uncertainty in these calculations, a reasonable case is presented for the profitability of a Polydome greenhouse. The central ideas behind the Polydome economic strategy: temporal and spatial stacking and the capture of multiple high value markets, do seem to produce an economic advantage in the model. Ascertaining the exact costs is something that needs to be done with greater precision once an actual design is made. 42 Pagina 41

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