To understand what color is "best", one needs to understand what effect(s) a blanket has on a pool.
First, a blanket prevents heat loss through evaporation. All covers are equal at that task. Secondly, a blanket prevents heat loss through insulation (this effect only works at night, when the pool water is warmer than the surrounding air). For this, again color doesn't matter, though covers with embedded air bubbles are more effective.
Finally, a cover can add to heat production via sunlight. Here is where color matters. A black cover absorbs more sunlight at the cover itself, making it much hotter. A clear cover lets more through to the pool itself, letting the water absorb the sun's radiation.
So which is more effective? Depends on whether you want "fast" heating or "highest temperature". The black cover will heat a cold pool faster...but will reach a lower overall temperature. This is because the high temperature gradient at the cover itself means increased heat loss due to surface radiation. The clear cover works somewhat slower...but ultimately will reach a higher temperature.
Colors such as blue lie midway between these two effects.
But in the final analysis, the differences between colors are fairly minor. A dark cover will, though, breakdown faster, as its greater absorption breaks down the plastic faster.
Black - Blue-dark - Blue-light - Clear, with Black being most effective, in that order.
But the differences between black and the other types are not very great, so many people make their choice based on other factors:
- appearance (some people don't like the look of a black pool cover)
- cost (some retailers charge different prices)
- availability (some retailers only stock certain colors).
I would say that Blue is probably the most common.
For an opposing viewpoint: During the day, solar energy from the sun heats the pool. You see all sorts of claims from cover manufacturers that their blanket "heat" the pool. This is false. All blankets block some of the solar energy coming from the sun. So which one blocks it the least? According to an unbiased government report I read, clear covers block 5-15% of the sun, while colored ones block 20-40%. So it's clear that clear is the way to go (sorry about the pun). The question then becomes, should I uncover my pool during the day when it is not in use? It depends. On calm, humid days, take it off for maximum heating. On dry, windy days, the evaporation loss out weighs the cover loss, so leave it on. Always leave it on on cloudy days and at night.
Over all I would say black, although any dark color would work, because dark colors absorb more energy unlike light colors that repel. It's kind of like wearing dark clothes in the winter and light clothes in the summer.
Use a clear cover to heat your pool. Use a black cover if you live someplace very hot and you need to cool your pool. A clear cover permits the maximum light in a pool while minimizing the evaporation. A black cover reduces the light that can heat your pool.
The US Department of Energy has a very good page devoted to the subject. They say that the purpose of the pool cover is to permit light into the pool (thus heating) and reduce evaporation.
Black on topside, silver underneath.
Very little I bought a solar blanket & it worked very well. Pool actually got too warm 90 degrees.
Solar water heating is generally more cost effective than an electrical water heater. Though solar water heaters usually have a higher initial investment if commercially purchased.
Active Solar Heating and Passive solar Heating.
ther best colour for a solar panel is black because it will exsob the heat faster
black because black takes in light and creates heat better than any other color.
how can the sun can produce heating directly in solar?
they get their energy from the sun
Solar heaters are useful for heating water with natural energy, thus saving electricity. The question is can effective solar heaters be made for less cost than using the electricity.
With a gas heater or solar or both and/or a solar cover or blanket. But I am assuming that you mean an above ground pool ~ then use the latter (solar blanket) .
The most effective frequencies for heating are in the infra-red part of the spectrum
solar heating is nothing new to the human race.The first solar heating facility was manufactured in 1952.
passive solar-heating system, and active solar-heating system are two types of heating system.. =D By: Wilfred Castro.
Solar Heating is when the sun's radiation or U.V. rays hit the solar panel and will start to heat up the thing that you want!
Direct heating of solar-designed homes, solar water-heating, and electricalenergy from solar 'photovoltaic' cells, is all directly from the sun.
On, it does not stop the sun from heating the water, it holds the heat in though. ( evaporation cools it quickly and the cover prevents this )
the solar heating system saves energy
Yes, a solar powered portable heating system can be used.
Yes, you can. The water still circulates into the skimmer and out of the outlet. Most circulation occurs below the surface so the blanket doesn't affect it. You may find that filtration is slightly less effective because the blanket stops surface debris from reaching the skimmer.
Remove the vinyl cover when using a solar blanket to warm the water. If the vinyl cover is used at the same time as the solar blanket, the vinyl cover absorbs most of the heat and then transfers the heat into the air or water between the vinyl cover and the solar blanket. Then the heat transfers to the solar blanket and then, finally, into the water. When this happens, a lot of heat remains in the vinyl cover and air/water between the two covers instead of getting into the water. It is preferable to have the heat absorbed by the solar cover and then transfer directly into the water. Hope this helps... Too much redundancy in pool covers.
passive solar heating system
passive solar heating systems
John Shewchun has written: 'Solar energy and the Canadian mining sector' -- subject(s): Mines and mineral resources, Solar energy 'An evaluation of the prospects of solar electricity and heating for Ontario' -- subject(s): Heating, Solar energy, Solar energy industries, Solar heating, Solar power plants
his solar powerd blanket