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  5. Temperature and humidity measuring instruments
  6. [Explanatory Material] What is heat flow in the first place? How does it differ from temperature?

[Explanatory Material] What is heat flow in the first place? How does it differ from temperature?

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last updated:Sep 24, 2025

トヨタ自動車 エナジーソリューション事業部
トヨタ自動車 エナジーソリューション事業部
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Understanding and distinguishing between heat flow and temperature is key to effective thermal design! We will answer questions that you may think you know but can't quite answer.

Everyone has experienced knowing the temperature using a thermocouple, right? But is temperature really all we want to know when designing for heat? Temperature is just a result, and often, I feel that lacking information can lead to detours in development when trying to implement effective measures. Have you ever felt that way? By understanding heat flow, we can connect it to effective thermal countermeasures. By the way, what is heat flow? How is it different from temperature? I've organized this information in an easy-to-understand way, so you can ask without hesitation. You can download it for free. Review it quietly and gain an edge!

    Temperature and humidity measuring instruments
【アイキャッチ】いまさら聞けないシリーズ1.png

[Explanatory Material] What is heat flow in the first place? How does it differ from temperature?

【アイキャッチ】いまさら聞けないシリーズ1.png
【アイキャッチ】いまさら聞けないシリーズ1.png
  • Related Link - https://www.toyota.co.jp/energyflow/

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Applications/Examples of results

- Understanding the heat generation and behavior of circuits, batteries, motors, etc. - Understanding the heat dissipation behavior of heat exchangers - Heat stress measures for on-site and office environments - Quantitative evaluation of the performance of insulation and heat shielding materials - Quantitative evaluation of warmth and coldness, etc.

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【Can't Ask Now #1】What is heat flow? How is it different from temperature?

【Can't Ask Now #1】What is heat flow? How is it different from temperature?

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トヨタ自動車

トヨタ自動車 エナジーソリューション事業部

Energy

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In the business development area of Toyota Motor Corporation, we are developing technology solution businesses that leverage the technologies and know-how cultivated over many years of car manufacturing. The heat flow sensor "Energy flow," which can measure "heat flux" essential for elucidating the mechanisms of temperature changes with high sensitivity and simplicity, is an in-house sensor utilized in Toyota's vehicle development field. It has become an indispensable item for the development of high-efficiency thermal energy management systems/components aimed at a decarbonized society, and it is being used by customers in various industries, including the automotive sector. Please feel free to contact us when you need assistance.

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