For many grower , glass has traditionally been the default pick . Yet , with today ’s petrol prices , growers are looking for alternatives to reduce heat losses within the greenhouse . " Energy rescue embark on at this full stop , " say Jelle Boeters from Filclair Nederland BV . Research done on behalf of the company show that using transparency can reduce energy demand by up to 28 % . " Foil is view as get a downcast light-colored transmittal than glass . However , the construction of a transparency greenhouse is much slimmer , so more Inner Light reach the canopy . "
" Greenhouses are amazing sunshine collectors , but as soon as there is no radiation , the accumulate rut is exhausted very cursorily . We ’ve seen enhancer greenhouses having better insulant , thus limiting heat loss , but we wanted to know precisely how much that would be and from what distributor point on it would be interesting for growers . "
So , the Hortinergy software was used to liken a glassful nursery with a enhancer greenhouse . That computer programme simulates the indoor clime and energy use of goods and services of a greenhouse projection . The thermal coefficient of the material , as to the international average of greenhouses , were used . Four types of greenhouses were compared : single glass without a cover , individual Methedrine with one screen , double inflated leaf without a screen , and double inflated folio with one screen . With all this selective information , the caloric Energy Department needs for the greenhouse were calculated over a complete tomato cycle , from December 1st till October 31st .
The last issue speak for themselves . The Hortinergy simulation express how the single glass greenhouse without a screen would use 381 kWh / m2 per class to ignite the greenhouse at 20 grade Celsius during the day and 16 degrees Celsius during the nighttime . With a screen , this number would go down to 290 kWh / m2 . A double - amplify leaf greenhouse would necessitate only 252 kWh / m2 to reach the same temperature levels throughout the year . Adding a projection screen to it would leave in an energy indigence of 207 kWh / m2 .
Thermal Energy needs for several configuration in Nantes for heatingat 20 ° hundred solar day /16 ° C night ( kWh / m²/month)
Light transmission"Glass is also the standard choice for growers as the unclouded transmittal of glass is high than foil , " Jelle extend . " This is true : if you compare two greenhouses with the same shape and structure , the double plastic screening would let through less light . However , since foil weighs less than glass , the complete structure is much slender with the same load . " liken a Venlo 2x4 nursery with the Filclair AERO+ material body , which has a much humiliated ridge than the competition in the Hortinergy software evidence , there ’s 17 % more light measure on the craw in the AERO+ substructure . " A thinner glasshouse structure imply less shadow liken to the larger structures of glass greenhouses . "
Daily mol reaching canopy for several contour in Nantes(mol / m²/jour)
Replacing foilThe foil on the greenhouses necessitate to be replaced every three years . " This is also why some agriculturist prefer looking glass greenhouses : they do n’t need the hassle of change the enhancer . Others though prefer it , as they always keep an eye on the latest foil technical school in the mart . By using double foil and a especial patented complex body part , our greenhouse is more airtight and insect - proof than our competitors . With the double - layer installation , agriculturalist can also prefer many configurations base on their pauperization for a diffuse and clear layer . Or they can prefer for a cool down foil to disperse the light so that the temperature goes down during the summer . Also , coatings can be applied to foil greenhouses .
Additional spreadoutOver the last calendar month , the company has consider growers in regions traditionally occupy with glass greenhouses look for foil options . " Norway , for example , " Jelle says . " In the yesteryear , foil glasshouse were regarded as only suitable for southern regions , but the current foil structure are more similar to glass complex body part . " Also , the initial investment in our structure is more good . " But that ’s not where you ’ll retrieve the greatest benefits , " Jelle concludes . " That truly is the 25 percent lower heating need . "
With the accelerator toll of the past , these telephone number were also relevant , but with the gas prices of today , it can be the difference between lose money , breaking even , or cause a profit . At the end of the day , it ’s the ROI that counts . "
For more information : Jelle BoetersFilclairTel . : +31 623 141 992Email:[email protected][email protected]www.filclair.com
© FloralDaily.com/Arlette Sijmonsma
