How does the Walter Sweating Fabric Manikin work

The Walter Sweating Fabric Manikin is a thermal manikin that is designed to simulate the heat exchange between a human body and the surrounding environment. The manikin is made of a fabric material that has a high thermal conductivity which allows it to transfer heat to and from the surrounding air.

The manikin also has a network of small tubes that are embedded within the fabric material. These tubes are filled with a liquid coolant that can be heated or cooled to simulate the temperature of the human body.

To use the manikin, it is first dressed in clothing that is typical for the intended use or environment. The manikin is then placed in a chamber where the temperature and humidity can be controlled. The coolant circulates through the tubes in the manikin and the temperature and humidity of the chamber are adjusted until the manikin reaches thermal equilibrium with the environment.

Measurements of the heat transfer between the manikin and the environment can then be taken, which can be used to evaluate the thermal comfort of the clothing and to assess the effectiveness of different insulation materials.