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How renewables and greenhouses are teaming up to grow fruits and vegetables


With its shoreline buffeted by the chilly waters of the North Sea, it is maybe counterintuitive to consider the Netherlands as a spot that cultivates massive quantities of tomatoes, peppers and cucumbers.

Thanks largely to its widespread adoption of greenhouse know-how, nonetheless, it does. The sight of those buildings, with their glass and aluminum glinting within the solar, is a standard one throughout the nation.

“Greenhouses are just as Dutch as wooden shoes, as tulips,” Marc Middeldorp, supervisor for design and engineering at Van Der Hoeven, a agency that makes a speciality of horticultural developments, instructed CNBC’s Sustainable Energy. “It’s a cliché, but it’s true,” he added.

Greenhouses – which have been utilized by gardeners for a lot of tons of of years – present an enclosed, managed atmosphere to grow issues equivalent to fruits and vegetables. The Royal Horticultural Society has additionally described them as being “invaluable for creating a protected growing environment for tender plants and seedlings.”

Founded in 1953, Van Der Hoeven is concerned in schemes that use greenhouse know-how to produce fruits and vegetables. Referencing variables equivalent to temperature, humidity and ranges of pests and bugs, Middeldorp defined {that a} greenhouse enabled customers to “fully control the climate inside.” Nevertheless, making a system the place situations are excellent could be fairly an power intensive course of.

“There is a demand, definitely, for clients to build sustainable greenhouses with efficient use of energy and to reduce as much as possible the use of fresh water, electricity,” he added. “And that’s where our challenge lies at the moment.”

This drive for sustainable greenhouses is an ambition shared by Dutch authorities. From this yr, in accordance to the federal government, all new greenhouses may have to be local weather impartial.

This purpose, it says, could be met by means of the usage of all the things from measures designed to save mild, to solar energy and what it describes as “geothermal applications.”

One firm that has developed sustainable tech for the greenhouse sector is Solho.

Headquartered within the Dutch metropolis of Delft, the corporate’s Solar Powered Horticultural Off-grid Unit, or SPRHOUT, combines solar energy with thermal power storage.

“It uses solar energy as an input to generate all the energy flows required to operate the greenhouse farm: heating, cooling and electricity,” Adriano Desideri, Solho’s CEO and co-founder, mentioned.

Desideri defined photo voltaic panels have been used to warmth water. “We store it in our thermal storage which we call the TESMOD,” he added.

“And then from here, we harvest this thermal energy: either for heating, or for cooling through a thermal chiller, or for electricity through a power unit.”

“In this way, we end up with a system that uses only the sun to generate all the energy streams required to operate the greenhouse farms.”

Olivier Dubois is senior pure sources officer on the Food and Agriculture Organization of the United Nations and co-ordinates its program on power.

Speaking to CNBC, he described the “greenhouse model” as “part of a series of farming systems which try to optimize the use of land and produce the maximum… food on a small amount of land.”

“Which is great, because it’s part of the whole need to be very efficient in the way we use resources,” he added.

“The problem is you need to also look at the other inputs and resources needed to produce the food. So, if you’re in a place where you don’t have a lot of water, you need to think twice before promoting that kind of model.”

Dubois went on to cite vertical farming as a technique of rising that sought to maximize the usage of each land and water however cautioned that “sophisticated systems” couldn’t “produce everything.”

“In particular, they cannot produce staple crops like cereals, they cannot produce trees that produce fruits and they cannot produce oil crops,” he famous. “So you need, also, the other systems, that use land, to complement these systems.”



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