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関連する概念動画

Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

2.3K
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...
2.3K
Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

3.3K
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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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 Transfer01:14

Mechanisms of Heat Transfer

382
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...
382
Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

4.4K
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.
4.4K
Heating and Cooling Curves02:44

Heating and Cooling Curves

23.0K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
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Updated: Jul 30, 2025

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

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高性能マルチモードエラストカロリー冷却システム

Suxin Qian1,2, David Catalini2, Jan Muehlbauer2

  • 1Department of Refrigeration and Cryogenic Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.

Science (New York, N.Y.)
|May 18, 2023
PubMed
まとめ
この要約は機械生成です。

研究者らは,疲労に耐えるニチノールチューブを使用して,高性能のエラストカロリー冷却システムを開発しました. この革新的な技術により,優れた冷却能力と温度範囲が提供され,先進的な冷却ソリューションの商用化への道が開けています.

さらに関連する動画

Author Spotlight: Assembly and Operation of a Cooling Stage to Immobilize C. elegans on Their Culture Plates
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Evaluation of the Impact of a New Cooling Cell Processor System on Islet Cell Isolation Facility
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関連する実験動画

Last Updated: Jul 30, 2025

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
11:11

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

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Author Spotlight: Assembly and Operation of a Cooling Stage to Immobilize C. elegans on Their Culture Plates
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Evaluation of the Impact of a New Cooling Cell Processor System on Islet Cell Isolation Facility
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Evaluation of the Impact of a New Cooling Cell Processor System on Islet Cell Isolation Facility

Published on: August 11, 2023

296

科学分野:

  • 材料科学
  • 熱力学について
  • 持続可能なエネルギー

背景:

  • 地球温暖化の可能性がゼロの冷却剤の開発を 求めています
  • カロリー冷却技術は高効率ですが,実用的なアプリケーションにスケールアップする際に課題があります.
  • エラストカロリー冷却は新興技術であり,持続可能な冷却ソリューションの可能性を秘めています.

研究 の 目的:

  • 高性能のエラストカロリー冷却システムの開発と評価
  • 疲労抵抗性ニチノールチューブを新しい熱交換アーキテクチャで使用する可能性を実証する.
  • エラストカロリー冷却の商用化の可能性を評価する.

主な方法:

  • 疲労耐性エラストカロリックニチノール (NiTi) 管を用いた冷却システムの製造.
  • 多モードの熱交換アーキテクチャの実装
  • 冷却能力と温度範囲を決定するための実験試験.

主要な成果:

  • 最大冷却力は260ワットです
  • 最大気温は 22.5 ケルビンでした
  • カロリー冷却システムの性能指数は最高です.

結論:

  • 開発されたエラストカロリー冷却システムは,高い性能を示し,重要な冷却力と温度範囲を示しています.
  • マルチモードの熱交換器の耐疲労性NiTiチューブの使用は,これらの結果を達成するための鍵です.
  • エラストカロリー冷却は,先進的で持続可能な冷却技術の商用化に有望な道を示しています.