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Daylight harvesting - a new old idea? #206759 08/08/12 03:28 PM
Joined: Aug 2006
Posts: 81
A
Albert Offline OP
Member
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”.

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Re: Daylight harvesting - a new old idea? [Re: Albert] #206760 08/08/12 04:44 PM
Joined: Jul 2004
Posts: 9,571
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gfretwell Online Content
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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
Re: Daylight harvesting - a new old idea? [Re: Albert] #206761 08/08/12 05:46 PM
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Posts: 361
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mbhydro Offline
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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.

Re: Daylight harvesting - a new old idea? [Re: Albert] #206762 08/08/12 08:59 PM
Joined: Apr 2002
Posts: 7,235
HotLine1 Offline
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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
Re: Daylight harvesting - a new old idea? [Re: Albert] #206763 08/09/12 09:32 AM
Joined: Aug 2002
Posts: 402
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jdevlin Offline
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Install a blind. Then it could be shut off if needed.

Re: Daylight harvesting - a new old idea? [Re: Albert] #206764 08/09/12 09:48 AM
Joined: May 2005
Posts: 984
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ghost307 Offline
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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
Re: Daylight harvesting - a new old idea? [Re: Albert] #206765 08/09/12 10:24 AM
Joined: Aug 2006
Posts: 81
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Albert Offline OP
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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

Re: Daylight harvesting - a new old idea? [Re: Albert] #206767 08/09/12 01:32 PM
Joined: Apr 2002
Posts: 7,235
HotLine1 Offline
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You guys are funny....LOL


John
Re: Daylight harvesting - a new old idea? [Re: Albert] #206768 08/09/12 02:20 PM
Joined: May 2005
Posts: 984
G
ghost307 Offline
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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
Re: Daylight harvesting - a new old idea? [Re: ghost307] #206773 08/10/12 12:09 AM
Joined: Mar 2007
Posts: 404
noderaser Offline
Member
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.


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