Announcements

Job offersmore »




Tweeting Growers

Last commentsmore »

Top 5 - 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

 

 
 
tweet
 
share

email
   
print
 
subscribe

 

Other news in this sector:

1/28/2015 Japan: take a look inside the major new city farm in Osaka
1/27/2015 How far from the canopy do I hang my grow light?
1/26/2015 US (IN): Can aquaponics thrive in the midwest?
1/26/2015 US (WI): Students grow lettuce in hydroponics experiment
1/23/2015 UC Davis gets USDA grant to develop robotic weed controller
1/22/2015 Worker’s compensation and the case for robot ballerinas
1/22/2015 US: Wearable technology is farming of the future
1/21/2015 Greenhouse business and production management with your smartphone
1/20/2015 Canada: Drone technology in agriculture
1/20/2015 Crazy LEDs announce Holographic Series 1 LED Grow light
1/19/2015 More distributors stock Dramm
1/16/2015 EU calls for development of innovative agricultural apps
1/16/2015 Get to know your greenhouse pests with this app
1/16/2015 How to measure dissolved oxygen in your irrigation water
1/15/2015 Watering: selecting the right tool for the job
1/14/2015 Canada: Robotic prototype could automate mushroom sector
1/13/2015 Canada: Acrobat Controls and Verhoef Electric merge to Acrobat Projects
1/13/2015 Clipping 5 hectares of cucumbers with 3 people at 1600 plants/hour
1/13/2015 Daily light integral as a measurement to manage light levels
1/12/2015 First ever working sweet-pepper harvesting robot

 

Leave a comment: (max. 500 characters)

  1. All comments which are not related to the article contents will be removed.
  2. All comments with non-related commercial content, will be removed.
  3. All comments with offensive language, will be removed.




  Display email address

  new code