car material properties

doors and roof ? steel

windows ? glass

what are you asking??

_{He's asking you to do his homework.}

This is not homework.

I am trying to find out the heat transfer coefficient and the thickness so that I can calculate the heat transferred to the car by sun if it is left in sun. I am searching for this data on net also but I m not getting anything. Btw who gets this kind of homework???

Put a thermometer inside and park the car in the sun. When the thermometer stabilizes, you have the answer.

"Btw who gets this kind of homework?" Engineering students.

Who gets this kind of homework?

I need to make a desalination system which should be small in size, should consume less energy and time. It should be able to desalinate 500mL of 3% by weight of sodium chloride solution at a time.

I need suggestions ,please someone help me out.

Sounds like homework to me.

YOU!!

buy a white car

paint the windows white as well

its the colour of the paint work that would affect heat transfer to inside

unless the metal is very thick or insulated.

any way i found this lot

http://rumors.automobilemag.com/6626446/green/california-scraps-cool-cars-legislation-push-for-reflective-glass/index.html

http://wiki.answers.com/Q/What_color_car_is_best_to_buy_to_stay_cool_black_or_green

http://www.warrantyinfo.com/2009/06/how-to-keep-your-car-cool-in-the-summer/

http://www.ehow.com/how_4532361_keep-car-cool-desert.html

http://www.ehow.com/how_4532361_keep-car-cool-desert.html

Engineering students. Automotive engineering students.

Google UOIT automotive curricula, Or Clemson Automotive curricula.

don't forget reflectivity, and spectral transparency of glass.

also specific heat and mass of interior materials.

My guess is you will find that the thermal pick up is a function of glass area; this can be changed somewhat by reflective coatings, adding metallic gold to the glass, and other means. Law enforcement will take a dim view of many of these as they obscure the view into the cabin as the california Air resources Board recently found out.

If you read the book all corvettes are red, they have a nice discussion of this problem when they designed the "new" corvette. at 125 degress F people's a$$e$ get first degree burns if their shorts are too short and they hit the non fabric seat.

http://www.alibris.com/booksearch?qwork=235973&S=R&mkwid=SPwAl120539&mcid=3789839514&siteID=Pw2LQAj_zJk-bwm4pSAdfrW_dHorsGPoZw

milo

Rana

You appear to be asking for the thermal conductivity of the materials, but this information won't help you. The heat balance is much more strongly influenced by other things. I would guess most of the input goes through the windows as sunlight (visible and infra-red, the glass stops most of the UV but that's a small part of the energy).

It will reach equilibrium temperature when the losses = the input, but these are determined much more by convection coefficients from the air inside to the body parts, and from the outside of the body to the outside air. These will be different for body parts in and out of the sun. Thermal conductivity of the materials has very little effect.

There are so many variables I doubt you would come up with anything useful if you tried to estimate. As various posters have suggested, it's better to do a test.

As an aside, something I've noticed is that a car left in the sun in the UK seems to get hotter inside than it does in say, southern Europe, though the sun is a lot stronger down there. Might be a humidity thing. Anybody agree (or disagree) with that or can comment?

Cheers.........Codey

I ve just thought of anther way to keep the car cool

park in a river

Buy a motorcyle...Cool and cool ( taken from one of the links)

you could try putting a second skin as used on land rover roofs

The Station Wagons saw the first expansion of the Land Rover range. Station Wagons were fitted with a "Safari Roof" which consisted of a second roof skin fitted on top of the vehicle. This kept the interior cool in hot weather and reduced condensation in cold weather. Vents fitted in the roof allowed added ventilation to the interior.

http://en.wikipedia.org/wiki/Land_Rover_Series