ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 19
Recent Posts
fuse rejectors
by NORCAL. 03/29/17 01:44 AM
Old decora style outlets
by NORCAL. 03/29/17 01:41 AM
NFPA stuff
by gfretwell. 03/28/17 08:08 PM
Anyone hiring inspectors?
by HotLine1. 03/27/17 08:03 AM
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,865 Are you busy
166,747 Re: Forum
160,870 Need opinion
Who's Online Now
0 registered members (), 82 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#206759 - 08/08/12 04:28 PM Daylight harvesting - a new old idea?  
Albert  Offline
Member
Joined: Aug 2006
Posts: 76
Falls Church, VA
I assumed that daylight harvesting was a relatively new technique, originating in recent concerns about the environment, sustainability, etc.

So I was surprised to see the following item on p. 32 of the June-July 1935 issue of “National Radio News”, a publication of the former National Radio Institute home-study school:

“In Wallach Bros. Store, Fifth Avenue, New York, illumination is kept constant by photoelectric tubes. Regardless of fluctuations in daylight, the interior of the store is always well lighted. These tubes automatically function to turn off and on enough lamps so that a constant degree of illumination is maintained”.


Work Gear for Electricians and the Trades

#206760 - 08/08/12 05:44 PM Re: Daylight harvesting - a new old idea? [Re: Albert]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,060
Estero,Fl,usa
If you look at the old factories you will see big skylight windows in the roof. This is not a new idea. Electric light is the new idea.

There are also some very old technologies for collecting and storing heat. This was done a lot in the desert where it is hot in the day and cool at night


Greg Fretwell

#206761 - 08/08/12 06:46 PM Re: Daylight harvesting - a new old idea? [Re: Albert]  
mbhydro  Offline
Member
Joined: Feb 2003
Posts: 347
Winnipeg MB Canada
I read somewhere that some of the big box chains are now putting in skylights to reduce their day time lighting costs in conjunction with their energy management systems.


#206762 - 08/08/12 09:59 PM Re: Daylight harvesting - a new old idea? [Re: Albert]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,803
Brick, NJ USA
A Walmart has skylights and daylight sensor control, it was done 3+ yrs ago. A few warehouses have installed some type of light tube for daytime 'free' lighting. A recent office reno installed one (1) light tube that has a 2x2 troffer look. That caught my attention when I turned the light switch 'off' and it remained lit. IMHO, a neat look, but what if the person prefers a 'dark' office for computer work? It could not be shut off in daylight!


John

#206763 - 08/09/12 10:32 AM Re: Daylight harvesting - a new old idea? [Re: Albert]  
jdevlin  Offline
Member
Joined: Aug 2002
Posts: 402
welland ontario canada
Install a blind. Then it could be shut off if needed.


#206764 - 08/09/12 10:48 AM Re: Daylight harvesting - a new old idea? [Re: Albert]  
ghost307  Offline
Member
Joined: May 2005
Posts: 900
Chicago Illinois USA
There is an possible alternative to installing blinds on the skylight.
When I was in college, the campus newspaper ran a parody issue that included an ad for the new GE "dark-bulb".
Designed for use in photographic darkrooms it sucked up all the light in a room whenever it was switched on.
smile


Ghost307

#206765 - 08/09/12 11:24 AM Re: Daylight harvesting - a new old idea? [Re: Albert]  
Albert  Offline
Member
Joined: Aug 2006
Posts: 76
Falls Church, VA
Here's the Brazilian version - and it's installed by the power company for "low revenue customers"!
http://www.youtube.com/watch?v=mZrVlV-5TdQ


#206767 - 08/09/12 02:32 PM Re: Daylight harvesting - a new old idea? [Re: Albert]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,803
Brick, NJ USA
You guys are funny....LOL


John

#206768 - 08/09/12 03:20 PM Re: Daylight harvesting - a new old idea? [Re: Albert]  
ghost307  Offline
Member
Joined: May 2005
Posts: 900
Chicago Illinois USA
The plastic bottle of water is a very clever and imaginative way of making a 'deck prism'.

What's a deck prism?
Even wonder how they lit the areas below decks in the wooden sailing ships when they didn't want to risk a fire??

http://glassian.org/Prism/Deck/Charles_W_Morgan/index.html

Just because people lived a couple hundred years in the past doesn't mean that they weren't smart.
smile


Ghost307

#206773 - 08/10/12 01:09 AM Re: Daylight harvesting - a new old idea? [Re: ghost307]  
noderaser  Offline
Member
Joined: Mar 2007
Posts: 404
Portland, Oregon, United State...
Originally Posted by ghost307
Just because people lived a couple hundred years in the past doesn't mean that they weren't smart.
smile


Just because someone lives in the present, doesn't mean they are smart.



Member Spotlight
mersadrad
mersadrad
Montreal, Quebec, Canada
Posts: 28
Joined: March 2011
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.020s Queries: 15 (0.003s) Memory: 0.8094 MB (Peak: 0.9891 MB) Zlib enabled. Server Time: 2017-03-30 14:40:32 UTC