Announcements

Job offersmore »

Tweeting Growers

Top 5 - yesterday

  • No news has been published yesterday.

Top 5 - last week

Top 5 - last month

Exchange ratesmore »




System can make greenhouse energy self sufficient for 90%:

Solar system uses Fresnel lenses to heat greenhouse

Using a special lens to magnify the light in order to harness the sun's energy, Sika Energy's system has the potential to cover up to 90 percent of a greenhouse's heating needs. The Fresnel lenses, which concentrate energy from the sun into a focal point, heat water inside a pipe to a high temperature. The heated water is then transferred to a reservoir tank that growers can use to heat the greenhouse during the day and throughout the night.



 

“The system can heat water up to 90 degrees Celsius,” said Sika Energy's Cees Kattenberg. That temperature can be achieved because of the type of lenses Sika uses. In early trials, Kattenberg explained, more typical lenses were used, but they were bulky, expensive and couldn't generate enough heat to justify their drawbacks. They turned to Fresnel lenses, which are lighter and generate more power because they concentrate the sun's rays into a single point.



“The lenses we use are basically magnifying glasses,” said Kattenberg. “They burn in a line.” Further boosting the energy captured from the sun, the lenses rotate from East to West, following the path of the sun, and the pipes full of water on which the lenses are mounted rise and fall with the position of the sun in the sky. Kattenberg noted that they continue to run trials with the system, and an upcoming project has given them the opportunity to experiment with new features.

“We're working on a project that will have a bay that's over 100 meters long, and it will have nine lenses,” said Kattenberg. It will be Sika's first commercial project, and it will be installed in a bedding plant nursery. Future trials will include lenses that are twice as large that have the potential to heat the water in the system up to 180 degrees Celsius.


Cees Kattenberg at the 2013 OFA Short Course in Columbus, OH.

Kattenberg touted the cost-efficient nature of the system, noting that the cost to set up the system is a fraction of that of other solar energy systems. The lower investment for a big energy payoff is what makes the system so attractive. “The good thing about the system is that it works anywhere there's sun, even when it's cold out,” said Kattenberg. “As long as the sun shines, we can get energy.”

For more information:
Sika Energy USA
Cees Kattenberg
Dutch American Greenhouse Builders LLC
4653 North County Road 45
Owatonna, MN 55060 USA
dutcham@dutch-am.com
http://www.sika-energy.com/gb/index.html

 

Publication date: 7/26/2013
Author: Boy de Nijs
Copyright: www.hortidaily.com

 


 

Other news in this sector:

3/27/2017 This sensor lets the sun manage your lights
3/23/2017 New Dutch project launched to tackle leaching of nutrients and pesticides
3/20/2017 CAN (BC): Ag ministry rewards innovations
3/17/2017 EU facilitates Dutch-Serbian knowledge transfer
3/17/2017 "Sensors will change the job of the grower"
3/15/2017 Would you let your plants control your light?
3/15/2017 US: Public and private sectors specialize in different ag research areas
3/14/2017 UK: Drone technology flying high at Cereals
3/13/2017 Learn the latest about lighting
3/9/2017 Japanese-Israeli partnership on reclaimed water use
3/9/2017 Dutch growers trial new Plessey LED grow lights
3/7/2017 US (OH): Researchers create rubber from tomato peels
3/6/2017 Indian consultant helps growers through innovation
3/6/2017 New Agrible app makes drones easy
3/3/2017 Syngenta expands digital agriculture capability
3/2/2017 ‘Internet of things’ to create big data for irrigated agriculture
3/1/2017 Aqua-Hort announces new agent for Holland and Belgium
3/1/2017 US (IL): Farm Market iD launches new data delivery tool
2/27/2017 Bees learn to play golf
2/24/2017 US: Horticulture researchers explore tech innovations