SYSTEM DESCRIPTION

Our thermodynamic system is a homemade solar heater built using recycled and inexpensive materials. The setup includes:

Two plastic bottles painted black: These bottles are the main heat absorbers. Black absorbs more sunlight, which increases the temperature inside the bottles. The heat warms the air inside them, simulating a basic air-heating system.

Cardboard box as the base structure: The bottles are placed inside a rectangular cardboard box that serves as the main body of the heater.

Interior lined with aluminum foil: The inner walls of the box are completely covered with aluminum foil to reflect and concentrate sunlight toward the black bottles. This improves the efficiency of the system by reducing heat loss and increasing the internal temperature.

Openings at the front and bottom: Holes are made in the box to allow air circulation through the bottles. Cool air enters through the bottom holes, is heated inside the bottles, and exits through the top or front, demonstrating convection.

Transparent cover (to be added during testing): A plastic or glass sheet will cover the top of the box, creating a greenhouse effect. This traps heat inside the system and prevents heat from escaping, further increasing efficiency.