First, I drilled a hole into the center of 5 wooden boards, all the same dimensions. I coated the top of each board with a different colors of fire protection, namely white, black, green, brown, and red. I placed each board on two supports (coating up - hole down) and inserted a temperature probe into the hole. I positioned a 500-watt heat lamp above the board and recorded the temperature every second for 30 minutes. Then, I turned the lamp off and recorded the temperature every second for 60 minutes. I replaced the lamp with a gas torch and repeated the experiments for the white and black boards.
Using curve fit parameters the heating and cooling curves were compared. The heating and cooling curves show a consistent sequence of the five colors: white, green, red, brown, and black. The white board reflected the most heat and released the heat most slowly. The black board absorbed the most heat and released the heat most quickly.
An explanation of the observed results has been developed to explain the evolution of temperature on the surface of a fire protective coating over time.
The project determines the effect of color on characteristics of a heat barrier material.
Science Fair Project done By Peiran Gao