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Solar powered air conditioning

Solar powered air conditioning

(Music playing) (Narrator) Over 50 percent of the
greenhouse gas emissions you produce in your home are generated by heating,
air conditioning and hot water. In other words keeping
your home warm in winter, cool in
summer with nice hot water on tap is emitting
2.5 to 5 tonnes of greenhouse gas
emissions each year. It also contributes a
hefty amount to your electricity bill, between
50 to 60 percent. CSIRO has invented a new solar
air conditioning system for Australian homes.
This technology solution will reduce Australia’s emissions,
reduce your energy bills and reduce our demand
for electricity and gas. If every home in
Australia installed our solar cooling technology
it would be the equivalent of saving
15 mega tonnes of CO2 or taking 3.5 million
cars off the road. CSIRO’s solar air conditioning
is an innovative three in one technology that provides hot
water, cooling and heating. It uses only a fraction of
the electricity of current systems and halves
greenhouse gas emissions. The process begins with a
typical solar hot water system. Water is heated by solar panels
and stored in the hot water tank. This solar hot water can
then be used throughout the home, reducing the need
for gas or electricity. A portion of the hot water is
diverted into CSIRO’s new solar air conditioning unit, which is
divided into two compartments. The hot water enters
a heat exchanger in the first compartment
of the unit. Similar to a car radiator the heat
exchanger uses the hot water to heat outside air that has
been drawn into the first compartment
through the vent. At the same time outside
air is also being drawn into the second compartment
into a desiccant wheel. The desiccant wheel is the most
critical part of the system. It is used to dry out the air
before it goes into the house. Slowly turning the
desiccant material in the wheel continuously
absorbs moisture in the second compartment and
then the absorbent material dries out in
the first compartment. The desiccant material is dried out
using the hot dry air generated by the heat exchanger. This air is then exhausted
outside the home. The dry air from the desiccant
wheel flows through an indirect evaporative cooler which creates
a stream of cool dry air. This cool dry air is then fed into the
home in order to cool down the rooms. In winter the solar heated air can
be used directly to warm the house. CSIRO’s solar cooling
system is a low emissions alternative to conventional
air conditioning and gas or electric powered heating,
providing more comfortable homes, reduced energy bills
and a cooler planet.

100 thoughts on “Solar powered air conditioning

  1. so, you us an evaproative cooler, but to compensate for the humidity it would add to the air in the hosue you pre-dry it w/ the dessicant wheel??

  2. So, basically, a swamp (evaporative) cooler that works in humid areas. Seems like that desiccant wheel would have to be enormous to work efficiently for a whole-house system though.

  3. heh, i was playing with a similar idea 2 years ago, but based on refrigerators that run on gas flames. So it used amonia

  4. The amount of "green house gas" generated by our cars or homes is not nearly a fraction of the amount generated by cow farming, meat production and using billions of acres of land to plant useless things like soy and corn. If you want to focus on a problem, focus on the right side of it then!

  5. There's one area I worry about with this. Air quality. The desiccant wheel is cycling between both chambers, and it's picking up particulates from the air in both. Which is then being recirculated through the house.

  6. This is effectively a two stage evaporative cooler. The first stage is described in this video where the incoming air in chamber two is desiccated and cooled slightly by the desiccation (the act of removing water from the air medium cools the air slightly). This desiccated slightly cooler air then comes across a typical evoprative cooler (stage 2) where it absorbs more water than normal, thus cooling the air more than a single stage evaporative cooler. The real question is, does this provide better cooling per litre of water?

  7. How effective is this system in a very humid environment? Does it reduce the humidity of the air as well as cool it?

  8. It's basically just an overly complicated, low output swamp cooler (the "air conditioning" side of it) with multiple single points of failure. The heating aspect might work but the cooling is going to be weak to non-existent. Because among other things you have a very hot "desiccant wheel" constantly moving through the cooling side of the system.

    Gotta love those Aussies though, they're the kings of over-complication. That's why they do things like use three syllable words to describe something the rest of English language speakers use a single syllable for. "Billabong" vs. "Pond" for example.

  9. Correct me if I'm wrong. But besides the fact that the dessicant wheel itself is already hot, doesn't the dessication process itself heat up the air anyway?

    Dessication and evaporative cooling are both just the processes of converting sensible to latent heat and vise versa. When you pass the air through the dessicant, it loses water vapor but the water vapor has to release energy to the air to condense to the dessicant. Likewise, when water vapor is evaporated by the air, the air experiences a loss in temperature as the water has to absorb energy from something to turn into water vapor. In an ideal process, the enthalpy or total energy of the air (in the form of sensible and latent heat) has to stay the same.

    Given this, isn't the addition of a dessicant wheel redundant then? The decrease in temperature that can be attained by the air was already dictated by how saturated with water vapor the incoming air is.

  10. So it just uses solar heat to slightly dehumidify outdoor air before sending it through an "evaporative" (aka air conditioning) coil powered off from electricity to cool the home? Instead of using a regular, inexpensive air conditioner to keep already conditioned indoor air cool? No thanks

  11. CSIRO, you said it's patented, so, please provide the patent number and the country covered. Thanks

  12. aoa sir sir i am a student of master form pakistan of energy department please tell me which material you used in evaporative cooler wires.

  13. if anyone is looking for some alternative energy sources then I recommend guide from this website since it's very well explained and also if you have any question they're supports is great [Awesome Plan Here >>>https://paper.dropbox.com/doc/Top-Secret-Information-About-Solar-OeSqzg5iDfpx3GdhpirO3 ]. These days electricity cost a lot so why not save your money

  14. way to much comercial and its not getting the planet cooler by wast of energy to drive the system, for cooling

  15. It went over my head. How do you heat water with the sun, bring that heat into the house and make the house cooler? I've used excess heat vented out the roof to bring cool air into the envelope from under the slab. I don't get this.

  16. Carbon and carbon dioxide is good in the atmosphere. Its food for plants and all other living things. It helps evaporate water for rain.

  17. And what about the maintenance cost of material that is certainly in heating and cooling conditions? Certainly it will detoriate fast.

  18. mmmm…evaporative cooler followed by dry cool seems bullshit…additionally recharging dessicant requires looong time and much of thermal energy so again bullshit….

  19. The dry air that flows through the desiccant wheel passes through an evaporative cooler, creating a temperature differential of how much? So there are two fans that move air and presumably some device that sprays water on the heat exchanger in the cooling circuit. Not to be Negative Nancy, but it sounds like two fans and a pump are consuming electricity for maybe / optimistically -2 degrees of differential. Can you share some test results?

  20. Install earth exchangers at about 18 to 22 feet in the ground. A constant temp of 54 to 56 degrees Fahrenheit with unlimited amounts of energy can be obtained.
    Always cool in the summer and a base amount of heat in the winter. The deeper you go the warmer it is.

  21. (energy) to the incoming outdoor air.
    Most energy recovery devices transfer heat (sensible) energy only. An Enthalpy Wheel allows both heat (sensible) energy and moisture (latent) energy to be exchanged. The Enthalpy Wheels are usually made of porous materials to increase surface area which aids in energy transfer. In most cases a matrix core material is coated with a desiccant such as Silica Gel or other molecular sieves to increase latent transfer.

    The Enthalpy Wheel, coated with a desiccant material, is rotated between the incoming fresh air and the exhaust air. Heat and moisture are given up to the wheel. When the space is in the heating mode, the heat and desirable humidity is used to pre-condition the incoming, cold, dry air. In the cooling mode, the incoming air is pre-cooled and dehumidified.

    Because the cost to remove moisture can represent 30 to 50% of the cost to condition air, substantial additional savings are available with enthalpy wheels over conventional air-to-air exchangers.

    Summer & Winter Energy Recovery Wheels

  22. The size of system you will need to achieve decent cooling would be enormous..and it doesn't work at night..

  23. Looks like a dehumidifier cum evaporative cooler. Can work at nights depending upon available sunlight and capacity of storage tank. Is it now commercially available?

  24. I live in Michigan where it gets to 100f or 38c and very high dew point… Winter and very cold -20f -29c. I wanna see it work here

  25. Nice movie. However you should take instructions from Avasva website if you want to learn how to make it easily.

  26. OK, I'm from a hot humid climate, looking for efficient cooling. I searched you tube and this product is wins! C'mon scientists of Youtube, pick this apart! Find the flaw… cuz I couldn't

  27. Wow! Sounds too good to be true. IF it really works, and, lasts…. PLEASE bring that tech to the USA! There are plenty of people who would buy that complicated tech.
    I thought hot water circulated via radiant floors to heat…guess it still could.
    But, using only air to circulate temps, means no water leaks damaging the house, and no tubing clogging from mineral deposits. Just keep the ducts cleaned.
    That said….why not simply design in simple geothermal to cool? Blow air via 6’ to 8’ deep geo-holes in ground, into house, helps cool..,.and, vastly decreases need of heating cold climates. Ground is at about 55 degrees F., at about 8’ deep, almost everywhere people live. THAT translates to simple tempering, winter or summer. So, whether one berms the house, or, carries that temp to the house, measurably reduces heating/cooling costs.
    Humidity can also balance in the ground, given the chance, via use of perforated tubings used to circulate the air to temper it in those holes, or directly.
    Insulate well, the “roof” lid of the geo-holes, over top of the tubing, to separate temps in the holes, from outside ambient temps. Once installed, there’s no fluid to leak, and nothing bringing hot temps into building envelope.
    And, only cost is fans to move the air.
    Tricky parts include: figuring how much tubing is needed in the Geo-holes, to temper the volume of the building.
    Leave bottom of the geo-holes as bare ground, to allow humidity to balance via earth.
    Perf’d drainage tubing comes ready made with drainage “stones” in a sock around them now, which facilitates humidity balancing. Though, some don’t bother to put tubing in the geo-holes; they simply input warmer air to top of holes, and bring cooler air from bottom of holes.
    Just need large enough holes &/or tubing, to cope with volume of air inside the building.
    That seems much simpler.
    Some fear that would bring in mold….it doesn’t seem to. Have seen this done in the Pacific NW of USA…quite humid weather. Mold happens worst, when air doesn’t move, or, when humidity lingers above about 50%.
    Humid air moved via bare-dirt in geo-holes, tends to balance into the earth…dry air takes on a bit of humidity, while damp air drops its moisture into the dirt. It also seems to freshen the air somehow…kinda like being in a cave that has moving air. Those who lived this way, didn’t seem to get mold in their cabins [earthen floors]; while those in well-sealed cabins, constantly fought against mold. Sealed cabins can’t “breathe”. Earthen floors, breathe.
    Geothermal holes, are like having an earthen floor to help the house breathe, as well as tempering the air.

  28. Will this system work well in an arid/dry climate like Phoenix Arizona United States? Or, is conventional air conditioning the only real solution? Temperatures average 107°F or 42°C and do reach temperatures north of 115°F or 46°C. Is your system available in the US?

  29. Well the first sentence in this video was very presumptive!
    Firstly, although I am in SEQld, I have no heating or cooling in my house and my hot water is on the lowest usage tariff and I use very little anyway.
    I would not produce 5ton of GHG per decade let alone per year!
    This is why I am looking at alternatives for a/c. To keep my GHG to the lowest level!
    As I am now in my twilight years and the summers seem to be getting hotter, I have been advised to get AC.
    But the extreme power usage weighs heavily on me, so some research is required before summer takes hold again.

  30. Where does the hot dry air go during summer?I mean,in summer,the cool air is being circulated,but where does the hot air go,which passes through the 1st compartment?

  31. 2:22 "Evaporative COOLER" – Yes like Every other Commercially Available Cooler – It looks like your using a process to reduce water from Atmosphere – that doesn't actually COOL homes, you still need the Evaporative Cooler to do the Work of COOLING the air … Is this a Cry for More Government Money? Aka Tax Money?

  32. Okay, but what if you need to sweat?

    There's nothing that's actually cooling the air except for evaporation, which significantly raises the humidity and reduces your body's ability to cool effectively.
    And for reference, when you remove water from the air, you also heat it up. that's just a part of the condensation process. So this does nothing.

    I was thinking this would involve something similar to an einstein refrigerator, which uses the heat of a flame, combined with liquids that have different rates of expansion and density, to cool the air going into the house. My family had an old motorhome with one of those, but unfortunately I don't think that would have a high enough efficiency to overcome heating by sunlight. maybe if the house was super well-insulated.

  33. FYI, radiant cooling which is very efficient but still needs a separate dehumidifier to dry the air. So an effective solar power desiccant wheel dehumidifier would be useful for many applications. So when will it come to market?

  34. no water pump required as the hot water system is equipped with a circulation pump. Hot air or cold air to house depending on time of year minus the humidity.

  35. Since this is an Australian video, why dont you simply copy the ideas of the Scandinavians and build decent houses with lots of insulation in the walls roof etc and use triple glazing. Otherwise its like trying to fit Air-con in a tent.


    Because the dessicant wheel will need to be larger than the housse AND it will still bring 100% RH inside. Have a look of the explanation. I've include a list of options that will do the work thousand time better than the present piece of shit and at a fraction of the cost.

    COMPARTMENT 1 (It will take hours to dry the dessicant wheel and this wheel will get too hot in the process)

    1 The hot water will be arround 70*C

    2 The air can't be warmed higher than the water temperature

    3 The dessicant wheel media can't be warmed higher than the air that has been previously warmed

    4 So, this double loss due to heat transfer will leave the dessicant wheel way under 70*C, maybe 50*?

    5 At 50*C, drying the dessicant wheel media will take MANY HOURS

    6 The dessicant wheel will barely lose any moisture, but will gain temperature

    COMPARTMENT 2 (It will take forever to remove any humidity from the outside air on a 50*C dessicant wheel)

    7 The dessicant wheel enter into the second compartment at arround 50*C and perhaps 20% less humidity

    8 The dessicant wheel will be cooled down by outside air to about 40*C (if it is 25-30*C outside)

    9 The dessicant wheel will barely trap some humidity from outside air (10% in one hour been outstanding)

    10 The barely driyer air, at 40*C will be cooled in another heat exchanger
    11 This last heat exchanger is an indirect evaporative cooler witch need a large cooling water tower outside (not showned, strange isn't?)
    12 The indirect evaporative cooler can lower the 40*C air to about 30*C


    So basically, as per number 9, unles you have a very very slow air flow, you will not get enough duration to get the water removed significantly from the outside air at such a high dew point. I guestimate that it will require a dessicant wheel about the size of the housse, wich is bulky AND expensive!

    But this is not the worst…

    The main flaws is the last steps. Since the water removal is marginal, it basically only rely on the indirect evaporative cooler, the only working part of this technology. This is not shown since it is not a new technology and it require a large water cooler outside and a large very large heat exchanger inside. Did I mention that an evaporative cooler work only when the outside air is dry? If the outside air is dry, then, there is no point to drying it with de dessicant wheel. If the outside air is moist, the evaporiative cooler is not working. Do you start to get it?


    OK, you asked nicely about a solution?

    Once you fired and sue the responsibles for this sensless proposition, you look to what was already known…

    More than two thousand years ago…

    A Yakhchal was able to cool down enough to create ice in desert. It is bulky and require a little water to evaporate, but it is pretty much zero energy input and it can be made from dirt. This passive evaporative cooling can be used with a heat exchanger. Air passing within a double whall will work just fine or air duct slightly burried under moist sand will work as well for such heat exchanger.

    You can also get a "Puit Canadien" to lower the outside RH and to significantly cool the air.


    Both technology coupled with a solar chimney will drive the energy consumption close to zero.

    You can also plant trees to get more shadow and evaporation from leaves will cool down your yard.

    You can also paint your roof and your driveway with an IR reflective paint (or simply white).

    You can build an irrigated green roof

    You can simply put a tarp over the roof to dissipate the majority of radiation energy from the sun.

    Alex from Québec, Canada

    Ps Please, take a break, remember that as an engineer you can kill peoples if you cannot calculate things properly… Do humanity a favor and consider going back to school.

  37. The desiccant material stays damp all the time, as 2nd compartment gets humid air from outside. I don't see any fans recirculating air from the 'hot water' pipes, unless the air is isolated there to blow into the desiccant, it will be humid as well. You have to have dry, not humid air to start with to dry the desiccant.

  38. Questions:
    1. Does the humdity escape somehow before or after the dessicant material?
    2.Is the dessicant a disposable feature, and if so,
    3. what is the replacement cost?
    4. what is the replacement interval?
    5. Is there a chance of mold accumulation over time?

  39. This is not a new technology..See Reviews of Renewable Energy Resources..sponsored by UN University Fellowship Program at Centre of Energy Studies IIT New Delhi ,India.

  40. A note about charge controllers>>>tinyurl.com/y5zdbb7g I was told by a solar engineer that to leave a controller always connected to a panel without also being connected to battery at the same will eventually burn out the controller. Be aware of this. You gave a very nice presentation; Very basic & easy to understand. Nice work.

  41. I live in a desert, cold in winter, hot in summer. Humidity generally under 20% in summer. How would this work with 20% humidity, 35C outdoor air temperature?

  42. There was a time when government research institutions would release their findings into the public domain and specifically tailor instructions for building their inventions for capable laypeople and mechanics in the general population, specifically farmers, ranchers, and shop enthusiasts. That era ended some time in the 1970s or 1980s. CSIRO — if you can't find an industry partner within a year or two of inventing something useful, then you should publish your results, and publish plans for citizens to build your devices on their own. You are holding back the progress of civilization by withholding your discoveries.

  43. "over 50% of the greenhouse gas emissions you produce in your home are generated by heating, air conditioning and hot water"…

    greenhouse gas emissions associated with electrical appliances are not produced at home you idiots. shame on you for trying to manipulate people who don't know this stuff.
    this is just a glorified evaporative cooler, which will need a gas or electric hot water unit to heat the water on cold days (when you need the heat the most)

    that moment you realize you're watching propaganda rather than a video of new a/c tech…

  44. Can be only be little efficient as it's use dessicant to dry for cooling only little effective mostly on coastal areas as coastal areas real feel is more hotter than the actual temperatures

  45. I do not understand how they say this is cooling, by that I mean where it cools to a satisfactory level. The cooling is taking place thru a dessicant but what are the values? Is it a 10 degree drop, a 5 degree drop? How about some numbers with different ambient temperatures and humidity… cause right now this is an animation that does not mean sh*t!

  46. 0:57 A video starting off like this immediately sounds off my BS alarm.
    Edit: And confirmed at 2:38. This won't work.
    From the trouble to not getting leaks on the compartment, over that they will fight each other (heat exchange in separating the wall) to the evaporating cooler that for reasons doesn't gives off moisture to the air.
    Also this solution, even if it works as advertised, will use a lot of water instead. …

  47. What about mold collecting in the fan? Would it not be prudent to have some type of UV light to treat the air before it's being sent throughout the house?

  48. Our normal temperature 20 to 40 three month winter temp average 18 to 24 degree C and 8 month summer average temp 30 to 45 maximum. I want to use Eco solar heating and cooling system. I want detail about pricing and maintenance price.

  49. If you cared about co2, you could cut all co2 made by internal combustion engines in half over night by taking the 50 largest tankers off the ocean. No need to change laws and culture and the lives of every human on earth instead. So obvious it’s almost as if someone just wants to control everyone’s lives more then help the earth. Hmmm

  50. This 3 in 1 system could be dramatically improved by new recent technology breakthrough of Valeriy Maisotsenko and our R&D team. Look at M-Cycle providing 100 deg. F Cooling Demonstration – 60 deg. Celsius air cooling. M-Cycle is well-known in Australia. Using M-Cycle your solar-powered system could be Siberia-cold and Sahara-hot @7hvA

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