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Cooling Cars with Solar Energy

03/17/2009 2:31 AM

Any one have an idea about water cooling system in parked automobiles by using solar energy.(With engine off condition) and it should be a seperate accesories need to fix in baggage/cabin area.

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#1

Re: Cars get too hot when parked

03/17/2009 3:43 AM

Arrrghhh....
Sledgehammernut syndrome.
The problem could easilly be designed out by suitable use of materials and not buying a black car.
Go for simplicity not added complication.
If you must add something.
It would be very simple to run the fan if the cabin tempreature exceeds a pr-determined threshold.
Unfortunately car manufaturers would feel obliged to wire this via the ignition switch/imobiliser/seat belt/handbrake/door locks etc to maximise the chance of electronic malfunction.

Del

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#2

Re: Cars get too hot when parked

03/17/2009 4:36 AM

In order to obtain cooling one has to push heat uphill along a temperature gradient. According to the lays of thermodynamics, energy is needed to do this, and the only place it can come from while the engine is off is the battery. Until it is flat, that is. So, what about the battery sizing? Larger batteries are more weight, and the charging current will require more power, which needs to come from the engine while it is running......

Sledgehammernut indeed.

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#3

Re: Cars get too hot when parked

03/17/2009 6:35 AM

A while back one of the mass marketers was selling a window mounted solar powered fan. I guess it did not work very well since it was only on those annoying television adverts for a short while.

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#4
In reply to #3

Re: Cars get too hot when parked

03/17/2009 7:59 AM

I have one of those and it actually works. On the days I didn't put it in the window it was very noticable. I got it as a party gift. Thought it was crap until I stopped using it and saw the difference.

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#5
In reply to #4

Re: Cars get too hot when parked

03/17/2009 9:14 PM

I have a solar battery charger, might find a muffle fan around here and make one myself. Just lay the solr panel on the dash...Thanks for the reminder.

Milo

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#7
In reply to #4

Re: Cars get too hot when parked

03/18/2009 6:38 AM

They looked like they might work from what i saw on the television, nice to know they do.

I have a 6 inch computer cooling fan installed in one of the back windows of my Land Rover that I was to suck the hot air out. The only air conditioning I have are the side windows.

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#9
In reply to #3

Re: Cars get too hot when parked

03/18/2009 7:52 AM

Thanks for the reminder. I have one of those window fan things too. They do work quite well. You can buy them at Walamrt or Kmart. Think they cost about $20.

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#6

Re: Cooling Cars with Solar Energy

03/18/2009 5:50 AM

An air-spaced panel above the existing roof (as used in the tropics on some Land Rovers, fuel tankers and other vehicles) makes an enormous difference.

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#8
In reply to #6

Re: Cooling Cars with Solar Energy

03/18/2009 6:40 AM

Ah yes, the tropical roof, wish I had one, I really must get my act together and make one for my beast.

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#10

Re: Cooling Cars with Solar Energy

03/18/2009 8:28 AM

If you had a tank of air compressed & attached to a separate tank of water which could be sprayed/or dribbled onto the roof when high temperatures detected you would evaporate a lot of heat that otherwise soaks into the vehicle .

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#11

Re: Cooling Cars with Solar Energy

03/18/2009 11:39 AM

I know you all guys know it but then, just for records, 'leave a small slit open on the windows and you will not find it very hot when you come back'

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#13
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Re: Cooling Cars with Solar Energy

03/18/2009 2:17 PM

capri,

'leave a small slit open on the windows and you will not find it very hot when you come back' - You probably will not find your car either .

Regards

Mr. W.A Snow

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#12

Re: Cooling Cars with Solar Energy

03/18/2009 12:04 PM

Did we not visit this topic a couple of years back? My original thoughts were to have a 'spoiler' type arrangement with solar panels charging a separate battery which would then drive a small compressor to feed a vortex tube, the cold end of which would provide a stream of cold air in the cabin. However, the gurus claimed this was far too inefficient, but who cares if the energy is free , the unit is neat, and it does the job (?).

Alternatively see cooling effect in Stirling engines. I believe you can work the magic with no moving parts, apart from a fan to distribute the colder air away, and passive regenerators.

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#14
In reply to #12

Re: Cooling Cars with Solar Energy

03/19/2009 8:48 AM

Here is cheapest version used in hot Indian summers (45 deg. C). We get a kind of grass called "Khaskhas" which has natural fragrance. Mat is made out of this grassed and mounted on the top hood of the vehicle, water is sprayed on the mat. Due to evaporation of water there is very cool and sort of perfumed atmosphere inside the car. Well after few hours you have to spray water again.

Suresh Sharma.

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#15
In reply to #12

Re: Cooling Cars with Solar Energy

03/19/2009 9:07 PM

Stirling engines are indeed a good option and it would be possible to drive one via a 12v source powered by solar voltaic array, perhaps mounted on the roof.

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#16

Re: Cooling Cars with Solar Energy

12/27/2012 12:29 AM

My aims to buy a Nano car.

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Biomass Nut (1); capri (1); Chankley (1); charsley99 (1); Dances with Trees (4); duikerbok (1); HoleInTheSnow (1); Milo (1); myname12 (1); PWSlack (1); scotchdrnkr (1); suresh sharma (1); user-deleted-1105 (1)

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