What house hold materials best reduce temperature rise inside a car
Ryan Ma, Gareth Jones
Burnaby South Secondary
Floor Location : J 079 P

Due to the greenhouse effect, cars left in the sun heat up significantly, placing passengers at risk to heatstroke and dehydration. Small children and pets are especially vulnerable because their size and their inability to escape.nnOur projects purpose was to find the best household material that acts as a windshield shade to reduce temperature rise within a car. We built a small box of plywood and metal to approximate a car. We put various polyester and wool clothing inside to represent a car's interior. We hooked up temperature sensors to the top, back and inside of the car. We used a light that approximated the suns light radiation. We made a cardboard mount on the windshield glass to simulate an air gap. Several household materials were placed on the mount and tests were run to determine the temperature rise inside the box.nnOur conclusions are: 1) reflective materials provide the best effectiveness; 2) low-transmittance (opaque) materials performed better than translucent materials. Another overall conclusion is that practically any household material placed behind the windshield is better than nothing.nnIf we were to continue this experiment, we would add tests for additional variables like the air gap between the shade and windshield, different car interior materials, and exterior paint colour. Also, experiments would be done with materials placed on the outside of the windshield.nnUses for this project and report would be as a tool to inform people how to keep their cars cool using widely-available household materials, and which materials perform the best.n