Heat transfer coefficient
heat transfer coefficient

Heat transfer coefficient evaluation with Heat Flux Sensing Technology

This short review describes how heat flux sensing technologies can be employed to determine heat transfer coefficient for a broad range of research and industrial applications.

About the importance of heat transfer coefficient assessment

heat transfer coefficient

The well-being of humans largely depends on clothing (i.e. textiles). Wrong clothing leads to discomfort and in extreme cases, to hypothermia (overcooling) or hyperthermia (overheating).

The organ which is responsible for the heat exchange between a human body and the environment is the skin.

The skin acts as a sensor which measures the heat flux. The heat transfer between skin and the environment is influenced by clothing.

Understanding the effects of different textiles on this heat transfer is crucial in designing functional high-tech materials for various applications such as:

  • Firefighting protective gear.
  • Construction workers protective clothing.
  • Oil and mining protective personal protective equipment.

Why choosing to perform heat transfer coefficient evaluation with gSKIN® Heat Flux Sensor?

Advantages of gSKIN® Heat Flux Sensor

gSKIN® Heat Flux Sensor presents many advantages for your application:

  • Miniature & compact heat flux sensor
  • Highly sensitive sensor
  • Facilitated integration into the application setups
  • Non-invasive & In-situ measurement technique of fabrics.
  • Enhanced monitoring of thermal processes in fabrics.
  • Potential integration according to ISO 8301 & ASTM C518-04.

More R&D Uses Cases where the gSKIN® Heat Flux Sensor is employed are available here.

heat transfer coefficient

Examples of heat transfer coefficient practical evaluation

yarn heat flux transfer coefficient

ETH project with yarn made from gelatin

ETH researchers used the gSKIN® KIT-2615 C to determine the insulation quality of yarn made from gelatin.

The yarn has similar qualities to merino wool fibers and could be an environmental friendly alternative to products made from petroleum, natural gas, or natural fibers.

The full article is available here on the ETH website.

In-situ thermal characterization measurements of functional wear

Using gSKIN® Heat Flux Sensors for the measurement of heat transfer coefficients of fabric is simple.

After identifying the spot of interest, the sensor is applied using skin-friendly tape. For read-out of the sensor signals, we recommend using our data loggers. Then, the data logger should be wired in such a way that the test subject can move freely.

The data logger will log all heat fluxes (in W/m2), which can then be evaluated after the experiment.

footwear heat flux coefficient

Discover the full application note “Thermal Characterization of Textiles: Do You Feel Comfortable in your Footwear?” here.