What are cyclic devices exactly?

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Discussion Overview

The discussion revolves around the definition and characteristics of cyclic devices, specifically examining whether heat pumps and refrigerators qualify as such. Participants also explore the relationship between heat engines and heat pumps, questioning if they are the same and discussing the broader categorization of engines.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants define a cyclic device as one that operates by following a set cycle repeatedly, affirming that heat pumps and refrigerators fit this definition.
  • There is a question regarding whether a heat engine is the same as a heat pump, with some participants seeking clarification on this relationship.
  • One participant asserts that a heat pump is essentially a refrigerator, which uses work to transfer heat, while a heat engine converts heat into work.
  • Another participant notes that the term "engine" is too broad to provide a definitive answer regarding its classification as a cyclic device.

Areas of Agreement / Disagreement

Participants generally agree that heat pumps and refrigerators are cyclic devices. However, there is disagreement regarding the relationship between heat engines and heat pumps, with no consensus reached on whether they are the same or how to categorize engines.

Contextual Notes

The discussion includes varying definitions and interpretations of terms like "cyclic device," "heat pump," and "heat engine," which may depend on specific contexts or assumptions not fully articulated by participants.

influx
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What are cyclic devices exactly? Are heat pumps and refrigerators both examples of cyclic devices? Also is a heat engine the same as a heat pump?
 
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A cyclic device is a device that operates by following some set cycle over and over again. Yes, heat pumps and refrigerators are cyclic devices.
 
dauto said:
A cyclic device is a device that operates by following some set cycle over and over again. Yes, heat pumps and refrigerators are cyclic devices.

Thanks.

Is a heat engine the same thing as a heat pump?

Lastly, are engines cyclic devices?
 
influx said:
Thanks.

Is a heat engine the same thing as a heat pump?

Lastly, are engines cyclic devices?

No, A heat pump is a refrigerator. It uses work to move heat. A heat engine uses heat to produce work. An engine is too broad a term to answer.
 

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