What is more efficient to dry clothes: wind or sun?

<sup>By Gabriela Portilho - Source



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Incredibly, the wind is more effective than the sun in drying clothes. It moves the particles of air, which collide with the water molecules of the fabric, speeding up its evaporation. The heat of the Sun causes a process similar to this, just more slowly. To test the theory, put wet clothes to dry in the sun inside a closed glass box and put the same clothes in a dark room with plenty of ventilation. Another factor that influences drying is air humidity. On dry air days, the water molecules that come out of the tissue cluster more easily into the atmosphere. The type of clothes also modifies this equation: clothes of more porous fibers, such as linen, favor the flow of water, while denser and denser clothes, such as wool, make it difficult to evaporate.

DRYING BY THE SUN

1. When we extend the wet clothes on the clothesline, the heat of the Sun provides thermal energy for the water molecules to begin to move

2. Thus, some molecules detach themselves from the tissue slowly and go into the atmosphere in the form of vapor. When all the molecules come loose, the clothes will be dry

WIND DRYING

1. The energy for the movement of particles does not come from heat, but from the displacement of air to the wind, which is faster than heat

2. In this process, known as convection, the mass of air stirs and "pushes" the water molecules out of the fabric, drying the laundry