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Related Concept Videos

Mechanism of heat transfer01:19

Mechanism of heat transfer

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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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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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Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

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Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
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Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

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Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
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Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

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Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
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Body Temperature01:25

Body Temperature

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The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
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Advanced Cooling Textiles: Mechanisms, Applications, and Perspectives.

Xueping Zhang1, Fei Wang1, Hanyu Guo1

  • 1Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 23, 2023
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Summary
This summary is machine-generated.

Developing advanced textile-based cooling systems is vital for human safety in high-temperature environments. These innovative personal cooling textiles manage heat and moisture, preventing heat-related illnesses.

Keywords:
cooling textilesenergy conservationthermal-moisture management

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Area of Science:

  • Materials Science
  • Textile Engineering
  • Human Physiology

Background:

  • Extreme heat poses serious health risks, including heat stroke and dehydration.
  • Effective personal thermal-moisture management is essential for human well-being in hot conditions.
  • Recent advancements focus on textile-based solutions for personal cooling.

Purpose of the Study:

  • To review current progress in textile-based personal cooling systems.
  • To classify different cooling mechanisms and fabrication techniques.
  • To highlight challenges and potential applications for industrialization.

Main Methods:

  • Literature review of recent advancements in textile-based cooling.
  • Classification of cooling systems based on mechanisms.
  • Analysis of fabrication techniques and materials used.
  • Identification of challenges and application scenarios.

Main Results:

  • Textile-based cooling systems utilize innovative materials and strategies.
  • Various mechanisms, including evaporative, convective, and radiative cooling, are employed.
  • Different fabrication techniques enable tailored thermal-moisture management.
  • Key challenges include durability, scalability, and user comfort.

Conclusions:

  • Textile-based personal cooling systems show significant promise for mitigating heat stress.
  • Further research is needed to address current challenges for widespread adoption.
  • Industrialization of these advanced textiles can enhance safety in high-temperature environments.