The Electrical Contractor Network

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

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
230 or 345 kV transmission lines?
by Vlado
Yesterday at 09:33 AM
breaker meltdown
by crselectric
Yesterday at 12:42 AM
Electrical mast flashing product
by ThomasWinfrey
09/22/16 12:14 AM
What estimating software do you recommend?
by sparky
09/21/16 07:20 PM
"Dry Run" Inspection goes awry
by HotLine1
09/20/16 07:39 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
HotLine1 15
sparky 9
gfretwell 9
sparky66wv 8
Vlado 6
Who's Online
0 registered (), 246 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#206759 - 08/08/12 01:28 PM Daylight harvesting - a new old idea?
Albert Offline
Member

Registered: 08/16/06
Posts: 76
Loc: 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”.

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#206760 - 08/08/12 02:44 PM Re: Daylight harvesting - a new old idea? [Re: Albert]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: 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

Top
#206761 - 08/08/12 03:46 PM Re: Daylight harvesting - a new old idea? [Re: Albert]
mbhydro Offline
Member

Registered: 02/21/03
Posts: 340
Loc: 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.

Top
#206762 - 08/08/12 06:59 PM Re: Daylight harvesting - a new old idea? [Re: Albert]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6785
Loc: 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

Top
#206763 - 08/09/12 07:32 AM Re: Daylight harvesting - a new old idea? [Re: Albert]
jdevlin Offline
Member

Registered: 08/07/02
Posts: 402
Loc: welland ontario canada
Install a blind. Then it could be shut off if needed.

Top
#206764 - 08/09/12 07:48 AM Re: Daylight harvesting - a new old idea? [Re: Albert]
ghost307 Offline
Member

Registered: 05/09/05
Posts: 876
Loc: 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

Top
#206765 - 08/09/12 08:24 AM Re: Daylight harvesting - a new old idea? [Re: Albert]
Albert Offline
Member

Registered: 08/16/06
Posts: 76
Loc: 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

Top
#206767 - 08/09/12 11:32 AM Re: Daylight harvesting - a new old idea? [Re: Albert]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6785
Loc: Brick, NJ USA
You guys are funny....LOL
_________________________
John

Top
#206768 - 08/09/12 12:20 PM Re: Daylight harvesting - a new old idea? [Re: Albert]
ghost307 Offline
Member

Registered: 05/09/05
Posts: 876
Loc: 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

Top
#206773 - 08/09/12 10:09 PM Re: Daylight harvesting - a new old idea? [Re: ghost307]
noderaser Offline
Member

Registered: 03/01/07
Posts: 405
Loc: 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.
_________________________
http://www.hsiprodsvcs.com/

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals