Mar 21, 2008 12:15 pm
Re: This is BOUND to catch on!3
Mar 21, 2008 4:59 pm
Yes….but we know how backward we can be at times.
I thought it was a good idea, and also thought about the heating side of it.
Re: This is BOUND to catch on!8
Dec 04, 2008 7:34 pm
any one thought of the plumbing cost to connect every window to a water supply??? economically it'll be not feasible.
Yeah…..but how many people do you know that would even do this?
Re: This is BOUND to catch on!9
Jan 07, 2009 1:57 pm
Would it even work properly i wonder. Have you ever touched your car window and thought "damn thats hot!" (usually its not) but whilst your driving with the window up it still seems to burn your arm. I think its the rays that actually connect with a dense object (say a concrete slab) that converts the radiation energy to heat energy. For example, space is a cold vacuum, yet the suns rays still warm the earth.
Sorry, my logic may be a little off whack, am i wrong?
Re: This is BOUND to catch on!10
Jan 07, 2009 2:09 pm
yeah i think its wrong. Sorry.
Water is known to be able to absorb large amounts of energy for every 1 degree that is increases in temp. Thats why you use water in your car radiator, and not something like oil or air.
The water would such the heat out of the glass before it goes inside.
Concrete ect is very good at storing heat etc.
Re: This is BOUND to catch on!11
Jan 07, 2009 2:28 pm
Radiant energy is what heats up the planet. That's why space is cold. But there's so much there that you would be sun burnt in seconds without a space suit as there is nothing to absorb the rays like the Earth's atmosphere. The radiant energy would still get through these windows, just as it gets through double glazed windows, but the amount reduces.
When radiant heat strikes an opaque object, a certain amount is absorbed (heating up the object), a certain amount is re-emitted and a certain amount is reflected, and this changes for colours, material types, surface types, etc. Eg. Light coloured roofs are better than dark as lighter roofs reflects more, which means less is absorbed and re-emitted into your roof space.
With transparent objects, a certain amount of radiant heat also travels though the medium, as well as being absorbed, re-emitted and reflected. Double glazing works by stopping the conduction of heat from outside the windows, and the only heat going to the next pane is the radiant heat that travels through and the re-emitted radiant heat. The absorbed and reflected heat do not make it through, which means there is less radiant heat striking the second window than the first.
The similar concept is here for the water cooled – except the water between the panes also absorbs some heat like the initial window pane, meaning less makes it to the final window pane. And the problem with the outside heat and absorbed heat conducting through the window is reduced as the water is flowing and gets cooled down so only small amounts are conducted.
I hope that makes sense.
Re: This is BOUND to catch on!12
Jan 07, 2009 2:35 pm
Oh and forgot to add - concrete absorbs heat well but takes ages to release it. That release time can be a negative. Such as in certain parts of Australia with roof tiles and colourbond roofs where it gets hot. The roof tiles can withstand heating up a little longer, but if it stays hot enough for long enough, the roof will heat up to a very similar temperature to the colourbond roof, and at night when it's cool, the colourbond roof can allow the heat the leave the roof space faster than the tiles, so the house can start cooling down much faster. So in hotter areas, colourbond is preferable, but obviously not in places where it's always cold.
Re: This is BOUND to catch on!13
Jan 07, 2009 3:22 pm
Plain old clear water won't trap heat passing through glass... and even if you could trap heat, you still have to dissipate it somehow. That could be by throwing away the water and using fresh or by cooling the water - and that's back to square 1 as you would need a substantial cooling device which sucks power - you may as well cool the space in the home.
I did once think about using coloured liquid which does hold infra red heat - and you could change the colour of your windows at will. Blue, red, yellow? I don't like tinted windows as it's a permanent change you have to live with...
Re: This is BOUND to catch on!14
Jan 07, 2009 3:28 pm
They probably do either chuck out the water or cool it.... But it has got a high specific heat capacity so it might not need it that often. I was actually thinking about costs of running the pump for the water too - I wonder how much electricity that would use going all the time..... It's not an environmentally friendly solution...... It would work, but it's much better just to design a house correctly. Then fans and opening windows at night would be enough 95% of the time like at the house I'm in at the moment. No need for air con!
Re: This is BOUND to catch on!15
Jan 08, 2009 11:49 am
Okay ive done a little research and it seems that this is quite a contraversial topic as it starts to touch on parts of "the theory of relativity"
From what i sussed out from these science forums is that the clear liquid or glass will absorb small amounts of heat from the photons (light rays) and much more light energy will still pass through.
If you were to dramatically increase the amount of heat energy then the light shining through your window would be reduced.
From this we can deduce that the water between the panes would have to be coloured darker to capture more photons and convert them into a heat energy. you can then refrigerate this water and transfer the heat away from the window. In essence you have a cooled tinted window that would be effective in cooling your house.
It seems to me that its probably better to just tint your windows and save on the power bill, or even better, tint your windows with a mirror tint and reflect all those photons back out.
The only heat energy that cold water will absorb is the heat that the glass atoms and water atoms have actually converted from radiated energy (which is fairly small as still so much of that energy is still in the form of light)
Light energy that is not converted to heat energy will not be influenced by conduction heat transfer, hence cold water has no influence over light energy.
Therefore this clear (untinted) water-window will not have a large cooling impact . Fhew!
Re: This is BOUND to catch on!16
May 15, 2009 3:52 pm
I doubt that this is a feasible solution looking at the electricity costs and cooling the water somehwereelse. A triple glazing with a second air gap should have agreat effect as well.
In regard to tinted glass it's worth mentioning that more heat is absobed by it and if only in a single glazed unit you will end up with more heat being released to the inside.
I don;t think it's feasible for residential and we would require more information about energy consumption to evaluate for commercial buildings.
Re: This is BOUND to catch on!17
Jun 08, 2009 8:28 pm
My concern is when there is no water in the gap there would be watermarks inside the window with no way of cleaning them so if you drained the water for winter it would look terrible. and also you would need a massive filtration system with dionized water and uv to kill bacteria because if alge or calcium deposits built up inside the window once again you wouldn't be able to clean them. the cost of running said filtration would surpass the cost of running an aircon flatout.
Sign in or Join to reply to this Topic