Heat flux explained: Why felt and measured temperature are not the same скачать в хорошем качестве

Heat flux explained: Why felt and measured temperature are not the same

Have you ever wondered why the felt temperature is not necessarily the same as the one measured? The reason for this phenomenon is that the human body is constantly exchanging energy with the environment via the skin. Depending on the external conditions the human body loses or takes up thermal energy. Typically, the outside temperature is lower than the body temperature and heat flows from the body to the air. Whereas a thermometer measures how warm or cold an object or medium is, the human skin can be seen as a sensor for the amount of heat which is transferred through it. On a windy day, for example, it feels colder because convection causes the human body to lose more heat. If the sun is shining, however, the radiation provides heat to the human body. In this case the body loses less heat overall and it therefore feels warmer. With the gSKIN® sensor you can measure conductive and convective heat fluxes as well as radiation fast and with high precision. These characteristics make the gSKIN® an essential tool whenever you need exact data on thermal systems, for example to optimize materials, measure solar radiation or to assess the energy efficiency of a building. For more information visit www.greenTEG.com