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:

5/22/2015 Philips' 2025 Plan: Improving health of 3 billion people
5/21/2015 Japan robot can pick strawberry fields forever for farmer
5/21/2015 Crop Farming 2030: The Reinvention of the Sector
5/20/2015 RAM introduces new processor cards
5/19/2015 US: Green Sense Farms enters Asian partnership
5/19/2015 China's largest PV greenhouse project goes online
5/18/2015 FarmedHere using Illumitex grow lights to feed Chicago
5/15/2015 New Zealand: Philips survey shows misperceptions about LED lighting
5/14/2015 Wageningen UR improving the use of screens in gerbera cultivation
5/14/2015 Video: How Demers Greenhouse is heated during Quebec's harsh winters
5/13/2015 Agworld developing Apple Watch App
5/12/2015 Looking for opportunities for multilayer cultivation research? Here is BrightBox
5/11/2015 Chinese ag tech to boost Tanzania farming
5/8/2015 Chinese private investors enter the greenhouse industry
5/8/2015 Could robots become an industry norm?
5/8/2015 Large scale agriculture can learn from greenhouse automation
5/7/2015 Cityblooms installs soliculture’s new breed of solar panels
5/5/2015 Direct insight into the status of your crop?
5/4/2015 CAAS: A closer look at the efficiency of China's immense greenhouse industry
4/20/2015 PARSource launches PowerPar, powered by Illumitex

 

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