The Deluded World of Air Conditioning Revisited

1. Solar Powered Air Conditioning Just Makes Sense

Some concepts just make sense- like when the developer of a solar powered pontoon boat pointed out-"Since most recreational boating is done when the weather is nice, solar power is particularly well adapted to the task." We were thinking that way while looking for a solar powered air conditioner- when do you need it? When it is hot and sunny. We looked at Justin's SolCool but we knew that natural gas fired AC units or propane fridges existed and thought heat is heat- there must be one somewhere, and put google to work. This is the first of a series- the Direct-Fired Absorption system.(DFA)

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2. Challenge: Build the Solar Powered Air Conditioner


We continue to be fascinated by the idea of a solar powered air conditioner, particularly after reading this in Alternet. Until central air became common, Florida and Arizona were barely habitable- you went in winter and cleared out. Now 20% of our energy goes to power air conditioning, and it defines the peak loads. 5.5% of our gasoline goes to power our car air conditioning, and four southern states-California, Arizona, Texas and Florida, account for 35% of it. Clearly if we are going to use less energy we have to address this problem. So here is a challenge to all you Lifehacker and Make types- build it for us. And not a lame ice-cooled pretend air conditioner but the real thing. Here are some ideas and parameters:

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3. The Sun Lizard - Solar Air Conditioning



Asks an Australian if they've been busy or not, and they might reply, "Mate, I've been flat out. Like a lizard drink'n." Colin Gillam, CEO of Alternative Fuels and Energy may well give just such an answer regarding his Sun Lizard solar heating/cooling project. Especially as he has been working on it for the past 16 years. His persistence finally paid off when last month he was scored both the judge's vote, and the people's choice vote on the ABC New Inventors TV show.

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4. Coolerado Coolers: Getting Close to Solar Powered Air Conditioning


We are intrigued by the idea of solar powered air conditioning; it is just so logical as you need it most when the sun is blazing. Right now the heavy-handed approach is to spend a lot of money on photovoltaics to run conventional units; there has to be a lower cost, more efficient way.

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5. Small-Scale Solar Powered Air Conditioning Is Here (in Spain, Anyways)



For years we have been saying that solar powered air conditioning just makes sense- if you are boiling in Phoenix the sun is probably shining really hard. We have seen big units, evaporative units that won't work in humid climates, a few vaporware units and even home-made absorption chillers

Now it looks like a Spanish company, Rotartica, has put it all together, by combining evacuated tube thermal collectors with a water-heated absorption chiller, and sized it at 4.5Kw (1.28 tons) for residential use, all packaged in a neat little box.

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6. Finally a Solar-Powered Air Conditioner: 6 Tons of A/C Using 4 Solar Panels



Finally a Workable System to Replace Current Energy Guzzling A/Cs?
In 2007 we covered a Coolerado A/C system with the headline "getting close to solar powered air conditioning". Back then, the unit produced 5 tons of cooling using 1,200 watts, getting within the range of what some people and small businesses could afford in solar panels. Now, the new Coolerado design can produce 6 tons of cooling using 600 watts, quite an impressive improvement!

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7. Steinway Installs Solar-Powered Air Conditioning



Solar-powered air conditioning just makes so much sense; it is usually hottest when the sun shines brightest. Now piano maker Steinway has installed an 80 ton absorption chiller that is powered by hot water from tracking solar panels. In the winter, the solar collectors provide water for heating.

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Tags: Air Conditioning | Green Building

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