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Related Concept Videos

Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Mechanism of heat transfer01:19

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Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
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Thermoregulation01:26

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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
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Mechanisms of Heat Transfer01:14

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Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
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Thermal Strain01:19

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Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
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Mechanisms of Heat Transfer II01:20

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In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
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Woven-Yarn Thermoelectric Textiles.

Jae Ah Lee1,2, Ali E Aliev1, Julia S Bykova1,3

  • 1The Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, TX, 75080, USA.

Advanced Materials (Deerfield Beach, Fla.)
|April 26, 2016
PubMed
Summary

Flexible textiles were developed to harvest thermal energy. These innovative textiles generate significant power from temperature differences, paving the way for new thermoelectric applications.

Keywords:
garter stitchplain weavetextilethermoelectric generatorszigzag stitch

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Textile Engineering

Background:

  • Traditional thermoelectric materials often lack flexibility, limiting their applications.
  • Harvesting waste heat from temperature gradients is crucial for sustainable energy solutions.
  • Developing flexible thermoelectric generators (TEGs) is essential for wearable electronics and IoT devices.

Purpose of the Study:

  • To fabricate and characterize highly flexible textiles capable of harvesting thermal energy.
  • To integrate n- and p-type semiconductor segments into woven structures for thermoelectric textiles.
  • To evaluate the power generation performance of these novel thermoelectric textiles under temperature gradients.

Main Methods:

  • Fabrication of specialized 'tiger yarns' containing both n- and p-type semiconductor segments.
  • Weaving these tiger yarns into a textile structure to create numerous n-p junctions.
  • Characterization of the textile's thermoelectric properties and power output under varying temperature differences.

Main Results:

  • Successfully fabricated flexible textiles with integrated n-p junctions.
  • Demonstrated efficient thermal energy harvesting in the through-thickness direction.
  • Achieved a high power output of up to 8.6 W m(-2) with a temperature difference of 200 °C.

Conclusions:

  • The developed flexible thermoelectric textiles offer a promising platform for efficient thermal energy harvesting.
  • The unique woven structure enables effective power generation from temperature gradients.
  • These materials hold potential for powering flexible electronics and other low-power devices.